Sm-6477

Transcript

!UNION SWITCH & SIGNAL!(m] SM6477 1000 TECHNOLOGY DRIVE PITTSBURGH, PA 15219-3120 Description, Operation, and Maintenance M& PORTABLE TEST UNIT (PTU) TEST SET Part No. N451400-4301 THIS MANUAL SUPERSEDES SM6477, DATED OCTOBER, 1994 COPYRIGHT 1994 UNION SWITCH & SIGNAL PRINTED IN USA MAY, 1996 UNION SWITCH & SIGNAL REVISION INDEX Revised pages of this manual are listed below along with date of issue. The black bar in the page margin indicates the area of change. Revised Page Date of Revision A SM6477 UNION SWITCH & SIGNAL TABLE OF CONTENTS Page No. sec/Para. I INTRODUCTION 1.1 1. 2 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II OPERATION 2.1 2.2 2.3 2.3.1 2.3.1.1 2.3.1.2 2. 3. 4. 1 2. 3. 4. 2 2. 3. 4. 3 2.3.4.3.1 2.3.4.3.2 2.3.4.3.3 2.3.4.4 2.3.4.5 2.3.5 2. 3. 6 2. 3. 6 .1 2. 3. 6. 2 2. 3. 6. 3 2.3.6.4 2. 3. 6. 5 2. 3. 6. 6 2. 3. 6. 7 2. 3. 6. 8 2. 3. 6. 9 2.3.6.10 2.3.7 2.3.8 2. 3. 9 2.3.10 2.3.11 2.3.12 2.3.13 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONTROLS AND INDICATORS . . . . . . . . . . . . . . . . . . . . . . . M6 TESTING USING THE PTU . . . . . . . . . . . . . . . . . . . . . . Preliminary Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amplifier Sensitivity Tests and Adjustments .. . PTU Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M6 System Ground Test . . . . . . . . . . . . . . . . . . . . . . . . . Power Supply Input/Output Measurements ....... . Cab Signal Testing (ATC & ATS Cutouts Both in Normal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Decoder Operation A-Car Controlled ........... . B-Car Controlled Cab Signal Testing .......... . Decoder Dropaway Timing Relay Measurments .... . 180 Decoder (-1207 PCB) . . . . . . . . . . . . . . . . . . . . . . . 120 Decoder (-1206 PCB) . . . . . . . . . . . . . . . . . . . . . . . 75 Decoder (-1205 PCB) . . . . . . . . . . . . . . . . . . . . . . . . ACK. PEN. DLY. Timing Measurement ............ . Failure to Acknowledge Brake Application Test. Speedometer Calibration . . . . . . . . . . . . . . . . . . . . . . . ATC System Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . VZ Test No Motion Detection Point Testing .... . Restricting Aspect Overspeed Point Testing ... . 75 Code 30 MPH Aspect Overspeed Point Testing. 120 Code 45 MPH Aspect Overspeed Point Testing 180 Code MAS Aspect Overspeed Testing ........ . ATC Penalty Delay Timing Measurement ......... . Emergency Brake Delay Timing Measurement ..... . BA Forestalling Test . . . . . . . . . . . . . . . . . . . . . . . . . . Reverse Mode ATC Tests . . . . . . . . . . . . . . . . . . . . . . . . ATC System Brake Application Tests ........... . Master Controller Comparator Test ........... . ATC Check Test Switch Tests . . . . . . . . . . . . . . . . . . . -4002 PCB Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4003 PCB Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ATC Cutout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ATS Cutout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . On-Board Tester Calibration . . . . . . . . . . . . . . . . . . . III FUNCTIONAL OPERATION 3.1 3.2 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DISPLAY P. C. BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. 3. 2 2. 3. 3 2.3.4 1-1 1-1 2-1 2-1 2-3 2-3 2-3 2-4 2-5 2-5 2-6 2-6 2-7 2-7 2-7 2-8 2-8 2-9 2-9 2-10 2-11 2-11 2-11 2-12 2-13 2-13 2-14 2-15 2-15 2-16 2-17 2-18 2-18 2-19 2-20 2-20 2-22 2-23 ~ 3-1 3-1 SM6477 UNION SWITCH & SIGNAL TABLE OF CONTENTS (Continued) Sec/Para. 3.3 3. 3 .1 3. 3. 2 3.3.3 3.3.4 3.4 TESTER P.C. BOARD Code Tester Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 VDC Isolated Power Supply . . . . . . . . . . . . . . . . . . . . No Motion Overspeed Oscillator . . . . . . . . . . . . . . . . . Timer and Timer Triggers Circuit . . . . . . . . . . . . . . . CAB CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-2 3-5 3-5 3-5 3-6 IV PTU TESTING AND CALIBRATION 4. 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PTU TESTING AND CALIBRATION . . . . . . . . . . . . . . . . . . . . . Frequency Counter and Overspeed Oscillator Tests Timer Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Code Tester Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Leakage Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 4 -1 4-1 4-1 4-2 4-3 4-4 4-5 4.2 4. 2 .1 4. 4. 4. 4. 2. 2. 2. 2. 2 3 4 5 v PARTS LIST 5.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 LIST OF ILLUSTRATIONS Figure No. 1-1 3-1 3-2 3-3 3-4 5-1 5-2 5-3 Page No. M6 Portable Test Unit Test Set (F4514000043) 1-2 M6 PTU Test Set Functional Block Diagram ....... . 3-3 M6 PTU Test Set Schematic Diagram . . . . . . . . . . . . . . . 3-9 Tester P.C. Board Schematic Diagram . . . . . . . . . . . . . 3-11 Display P.C. Board Schematic Diagram . . . . . . . . . . . . 3-13 M6 PTU Test Set F451400-0043 Component Location Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 Component Location Diagram for Tester P.C. Board N4518079501 . . . . . . . . . . . . . . . . . . 5-9 Component Location Diagram for Display P.C. Board N4518079401 . . . . . . . . . . . . . . . . . 5-11 ii SM6477 UNION SWITCH & SIGNAL This page intentionally left blank iii SM6477 UNION SWITCH & SIGNAL OVERALL DIMENSIONS (APPROX): 18-1/4"L x 9-3/4"W x 8"D M6 Portable Test Unit iv SM6477 UNION SWITCH & SIGNAL SECTION I INTRODUCTION 1.1 GENERAL The M6 Portable Test Unit (PTU) Test Set, hereinafter called PTU, is shown in figure 1-1. The PTU is used with a cab signal loop tester and provides the necessary equipment for testing, measuring, routine calibration for periodic inspections and troubleshooting of the M6 Cab Signal/ATC System. The PTU interfaces to the M6 rack via the PTU cable that is connected to the M6 rack PTU connector. This cable, when connected, supplies power to the PTU from the cab signal system, and interfaces the PTU's indications and controls to/from the M6 cab signal/ATC system. Short circuit protection is provided for the PTU by the cab signal power supplies internal short circuit protection. 1.2 DESCRIPTION All components of the PTU are housed in a fiberglass case with hinged cover, providing easy access to the controls and indicators. The controls and indicators are all located on the surface of the PTU panel. Mounted to the top and underside of the PTU panel are all the components comprising the PTU. Major components include the Display PCB and Test PCB, digital multimeter and timer and oscillator (frequency counter) meters. A storage compartment is built into the case fore storing the PTU cable and miscellaneous test cord and jumpers. The sonalert interfaces to the alarm circuit in the M6 Cab Signal/ ATC rack to provide an audible indication. The variable oscillator in the PTU is for testing the no-motion, speedometer and overspeed functions of the ATC system. The oscillator's output frequency is applied to the ATC system's speed sensor. The PTU also contains a multimeter, frequency counter, and timer. The multimeter provides the means to measure various voltages, currents and resistances while inspecting and troubleshooting the ATC system. The PTU frequency counter is internally connected to the oscillator output and measures the oscillator output to the nearest hertz. The timer indicates the various time delays generated within the ATC system. The PTU contains a manual code selection (NO CODE, 75, 120, and 180 codes) injection type cab signal test circuit. The cab signal test circuit verifies the operation of the 100 Hz filter, amplifier, decoding and acknowledging systems operation. The cab signal test circuit does not test the amplifier sensitivity. A cab signal loop tester is needed to test the amplifier sensitivity. 1-1 SM6477 ...; , i :::;o '"tj (1) ~ crj "'- Q. (1) (1) (D "::, -g_ -- 11 3 ~ "' ~"' f-'· tQ 25 26 16 (1) "~ (1) f--' ~ (5" c: ::, I ...., cr(1) " ~o s: (1) DODD '<::, o.-· _=> 0 9: 1:1 ...., 14 :::;lll -" 0 (D (1)- S' 00 c:,· >-3 (D 9' ct f-'· ~ 1D ct ')> @@@ CY ::··----@ sI (1) "g- @ 1FUNCTION t ! iNDICATION ::, I SELECTION RANGE "O "'"' (1) Ul "' (D .'.. ct I "'....... .... ~ lli CLiilln! Hz ,------- @l---+-+-- , TIMER RESET l" CJl ct I ·::::·:::«''W"""'"';§f SEC. :·----D :s PTU (f) (D 24 10 2 1 9 8 7 5 i ' s :FREQUENCY ' c: z 0 z ~:::; . ":c 4 e 5· I 23 NO MOTION OVERSPEED OSCILLATOR TIMER "' [j]]-+-+- 15 ...; >-3 ;: i]]]i] i]]]i] i]]]i] i]]]i] '@,.~ACK 9 ;A~E; S~TU~ ®""'@- 19 (1) (1) ~ 00 _,,,1a_,,,20_,,,21_,,, 22 13 -oo CJl >-3 12 (1) Q. ct p, Ifill ---17 in @"' rj c:: bk "' q~o 0 'd S: ------1 "'::, °''d ~I CAB CONTROLS 30 6 en i5 z ,,.r UNION SWITCH & SIGNAL SECTION II OPERATION 2.1 GENERAL This section contains information pertaining to the PTU controls and indicators and the PTU operating procedures. 2.2 CONTROLS AND INDICATORS Table 1 provides a brief description of the PTU controls and indicators which are shown in Figure 1-1. Table 1: Controls Definition CONTROL/INDICATOR DESCRIPTION 1. PTU ON/OFF Switch When set to ON, with PTU connected to an energized M6 rack, turns on PTU. 2. PTU PUSH TO TEST INDICATION Pushbutton Switch When pressed, turns on all PTU indicators when the PTU is properly powered. 3. Multimeter The multilneter provides the means to measure various voltages, currents, and resistances while testing and inspecting the ATC system. 4. NO MOTION/OVERSPEED OSCILLATOR Hz Indicator (Frequency counter) Indicates the output frequency of the PTU internal variable oscillator. 5. RANGE Switch Selects the output frequency range of the PTU internal variable oscillator. 6. FREQUENCY Control Varies the output frequency of the PTU internal variable oscillator. 7. TIMER RESET Pushbutton Switch When depressed, resets the PTU internal timer triggers and resets the TIMER SEC. indicator to zero. 8. TIMER SEC. Indicator Indicates the length of the various time delays generated within the ATC system. 9. TIMER FUNCTION SELECTOR Switch a. 4003 DLY. Position - Measures the 10 to 15 second delay to penalty enforced by the 4003 card. The tilning measurement starts when the PTU MASTER CONTROLLER switch is placed in the POWER position and stops when the SBR relay is deenergized. b. 4002 DLY. Position - Measures the 60 to 80 second delay of the -4002 card. The timing measurement starts when the BA relay is energized and stops when the PK relay is deenergized. c. ACK. PEN. DLY. Position - Measures penalty delay titne for failure to acknowledge. The titning measure1nent starts when the AKP relay is deenergized and stops when the SBR relay is deenergized. d OS. PWR. CUT DLY. Position - Measures delay tilne for a system applied power knockout from overspeed. The timing 1neasure1nent starts when the US relay is deenergized and stops when the PK relay is deenergized. e. OS. PEN. DLY. Position - Measures delay time to penalty fro1n an ATC overspeed. The ti1ning measure1nent starts when the US relay is deenergized and stops when the SBR relay is deenergized. f. SERV. ERK. TO EMER. ERK. DLY. PositionMeasures the delay time from the SER relay deenergizing to the EBR relay deenergizing. g. DECODER DROPAWAY DLY. Position Measures the dropaway time of the 75,120 and 180 decoders. The tilning 1neasure1nent starts when the CODE TESTER ON/OFF switch is set to OFF and stop when the 15 indicator turns on. 2-1 SM6477 UNION SWITCH & SIGNAL Table 1: Controls Definition DESCRIPTION CONTROL/INDICATOR 10. Sonalert Alarm Sounds when ATC syste1n generates an alarm. 11. CAB CONTROLS MASTER CONTROLLER Switch Simulates the ATC Master Controller interface when testing the system using the PTU. When testing this function both the A & B cars MASTER CONTROLLERS MUST BE keyed out. If testing is being perfonned from the A & B cars MASTER CONTROLLERS with the PTU connected, this switch must be in the POWER position. 12. CAB CONTROLS BA Toggle Switch When set to the ON position, energizes up the M6 system BA relay. 13. CAB CONTROLS ACK Pushbutton Switch When mo1nentarily depressed, enables acknowledgment of restricting aspect changes. 14. CAB CONTROLS MODE Toggle Switch When placed in the REVERSE position, energizes the MODE relay in the M6 system. 15. CAB CONTROLS LEAD Toggle Switch The CAB CONTROLS LEAD toggle switch silnulates either A-CAR or B-CAR 1naster controllers KEYED-IN and in FORWARD. If testing is being performed from either cabs master controller with the PTU connected this switch must be in the center OFF position. 16. MAS (Normal Aspect) Indicator The MAS (nonnal aspect) indicator turns on when the M6 cab signal syste1n detects 180 code. 17. 45 (Limited Aspect) Indicator 'furns on when the M6 cab signal systc1n detects 120 code 18. 30 (Approach Aspect) Indicator Turns on when the M6 cab signal syste1n detects 75 code. 19. 15 (Restricting Aspect) Indicator Tun1s on when the M6 cab signal syste1n detects No CODE. 20. !NOP Indicator Turns on when the CAB CONTROLS MODE switch is in REVERSE or the car's ATC or ATS switches are cutout. 21. OVERSPEED Indicator Turns on when the M6 ATC system is in an overspeed condition. 22. CAB TEST Indicator Flashes at the code rate generated by the PTU, controlled by the code tester in the P1U. 23. MSTR CONT Indicator Turns on when the controlling MASTER CONTROLLER switch (PTU, A-CAR or BCAR) is in the COAST thru EMERGENCY positions. 24. VITAL RELAY STATUS Indicators Each of the VITAL RELAY STATUS indicators are described below: a. VZ INDICATOR. Turns on when the ATC syste1n's VZ rel;ay is energized, indicating that syste1n is sensing velocity zero. b. BA INDICATOR. Turns on when the ATC syste1n BA relay is energized, indicating that system is sensing deceleration at the forestalling rate. c. PK INDICATOR. Turns on when the ATC syste1n PK relay is energized, indicating that system is sensing speed below ATC speed limit. d. SBR INDICATOR. Turns on when the ATC syste1n SBR relay is energized, indicating that system is enforcing a penalty. e. EBR indicator. Turns on when the ATC syste1n EBR relay is energized, indicating that syste1n is enforcing an EMERGENCY. 25. CODE TESTER ON/OFF Switch Controls power to the code tester function. 26. CODE TESTER Selector Switch Selects the coded output of the 100 Hz carrier for cab signal testing 2-2 SM6477 UNION SWITCH & SIGNAL 2.3 MG TESTING USING THE PTU 2.3.1 PRELIMINARY TESTS 2.3.1.1 Amplifier Sensitivity Tests and Adjustments Use the M6 CODE TEST SET and test loop. Do not use the PTU. To test and adjust the amplifier sensitivity, perform the following procedure. a. Position a cab signal test loop on the rails under the A-Car track receivers. b. Key in the A-Car Master Controller and place the REVERSER in Forward c. Connect the cab signal tes :._ loop to the LOOP OUTPUT plug on the M6 CODE TES'I' SET. d. Connect the M6 CODE TEST SET's power to 110 Vac power. e. Set the CODE TEST SET's switches on the following position. {NOTE: Input power switch is a circuit breaker) •INPUT POWER - ON (Note: if switch trips, test set is defective.) •CODE SELECT - STEADY •LOOP OUTPUT LEVEL - HIGH •CARRIER LEVEL 100 HZ ADJUST - ADJUST UNTIL UNIT'S METER READS 1 ± 0.1 AMPS f. Set the M6 CODE TEST SET'S CODE SELECT switch to 180. The GREEN ASPECT on the A-Car ADU should not light. If it is lit, the M6 system's amplifier sensitivity is too high, so proceed to Step h. g. Gradually turn the CARRIER LEVEL 100 Hz ADJST clockwise until the GREEN aspect on the A-Card ADU lights. h. To measure the pick-up current level, set the M6 CODE TEST SET' s CODE SELECT switch to STEADY and read the CODE TEST SET' s meter for the pick-up current level. The meter reading should be between 1.3 and 1.6 amps. If the pickup level is within tolerance, proceed to Step i. If the pick-up is not within tolerance, adjust the carrier level lOOHz ADJUST knob until the meter reads 1.45 ±0.1 amps. Then set the CODE SELECT switch to the 180 position. Adjust the M6 ATC System's -1601 PCB amplifier sensitivity per the following: 1. Locate the -1601 AMPLIFIER card in the M6 Cab Signal System. If the LED on the -1601 card is flashing, adjust the lower cardedge adjustable resistor (R14) on the -1601 card clockwise until 2-3 SM6477 UNION SWITCH & SIGNAL the LED turns off. 2. If the LED on the -1207 card is on, adjust the top adjustable resistor (Rll) on the -1601 card counterclockwise until the LED on the -1207 card turns off. 3. To set the amplifier sensitivity, slowly turn the top adjustable resistor (Rll) on the -1601 card clockwise until the LED on the -1207 card lights. 4. To set the "turn on level" of the LED on the -1601 card, adjust the lower cardedge adjustable resistor (R14) on the -1601 cardedge counterclockwise until the LED just begins to flash. The cab signal amplifier sensitivity is now set. i. Using the M6 CODE TEST SET, verify that the minimum cab signal pickup from both the A and B car cabs is within the 1.3 to 1.6 rail amp window at all three code rates; 75, 120, and 180. j. Place the M6 CODE TEST SET'S INPUT POWER switch to OFF. 2.3.1.2 a. PTU Set-up Set the PTU switches in the following positions: •PTU - OFF, BA - OFF, MODE - NORMAL, LEAD - OFF, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. Connect the PTU to the 36 pin plug connector cable supplied with the PTU and connect the cable's other end to the M6 Cab Signal/ATC rack PTU connector located to the left of the interface terminal boards. NOTE When using the master controller controls on the PTU both the A and B car master controllers must be keyed out. c. Place the PTU ON/OFF switch to the ON position. Momentarily depress the ACKNOWLEDGE switch if the Alarm is sounding. Observe: (1) The 15, VZ, PK, SBR, EBR, and MSTR CONT are ON. (2) The digital display on the TIMER is ON. 2-4 SM6477 UNION SWITCH & SIGNAL d. 2.3.2 Press the INDICATION Push to Test button, and observe the thirteen square indicators turn on while the switch is pressed. M6 SYSTEM GROUND TEST a. Turn OFF ATC breakers in the A-CAR. b. On the PTU, unplug the power cable in the side of the FLUKE meter. Meter now operates on it's internal battery. Turn meter on and set to read M ohms. Connect one meter lead to rack's metal frame, perform ground testing on the rack's interface terminal boards terminals 1 thru 77, and all circuit board and filter test points. ALL MEASUREMENTS MUST EXCEED 1 MEG OHM. c. Set the Fluke meter to read resistance (2K scale). Connect the meter leads to the speed sensor input on the ATC rack interface terminal board, terminals 7 and 9. Measurement must be between 175 and 225 ohms. d. Move the meter leads to the F-End track receiver input terminals on the ATC rack interface terminal board, terminals 67 and 69. Measurement must ne between 382 and 470 ohms. e. Move the meter leads to the B-End track receiver input terminals on the ATC rack interface terminal board, terminals 66 and 68. Measurement must be between 382 and 470 ohms. f. When complete, plug meter power plug back into the meter to save battery life. 2. 3. 3 POWER SUPPLY INPU'r/OUTPUT MEASUREMENTS a. Ensure the Cab Signal/ATC rack is powered and the system's power supplies are on. Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - OFF, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF. b. Set the FLUKE meter to read DC volts. Measure M6 rack terminals [101(+) & 102(-)] and [103(+) & 104(-)]. Measurements must be between 24 to 50 volts in both cases. c. In the M6 ATC rack, turn off the circuit breaker on the right power supply. Observe the POWER SUPPLY FAILURE indication light above the ATC locker is on. 2-5 SM6477 UNION SWITCH & SIGNAL d. Using the Fluke meter, measure the DC voltage across M6 rack's interface terminal board, terminals 2 (+) and 1 (-). 31 to 32 volts must be measured. e. Using the Fluke meter, measure the DC voltage across M6 rack's interface terminal board, terminals 1 (+) and 8 (-). 22 to 25 volts must be measured. f. In the M6 ATC rack, turn on the circuit breaker on the right power supply and turn off the circuit breaker on the left power supply. Observe the POWER SUPPLY FAILURE indication light above the ATC locker is on. g. Measure M6 rack interface terminals 2 (+) and 1 (-). Measurement must be between 31 and 32 volts. h. Measure M6 rack interface terminals 1 (+) & 8 (-). Measun:nent must be between ;;7 to 25 volts. i. Ensure both power supplies circuit breakers in the M6 ATC rack are turned on. Observe the POWER SUPPLY FAILURE indication light above the ATC locker is off. CAB SIGNAL TESTING (ATC & ATS CUTOUTS BOTH IN NORMAL) 2.3.4 2.3.4.1 Decoder Operation A-Car Controlled NOTE The code tester in the PTU is designed to verify the operation of the decoder printed circuit boards, and drive a properly adjusted -1601 PCB in performing this verification. The PTU's code tester is NOT to be used in amplifier sensitivity adjustments. a. Set the PTU switches in the following positions: BA - OFF, •PTU - ON, MOM PRESS ACK PUSHBUTTON, •MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF. b. Set FLUKE meter to read DC current, 200mA scale. Measure decoding currents from 75, 120, and 180 phone jacks. In all cases currents must be less than 2mA. c. Set PTU's CODE TESTER to ON & CODE SELECTOR to 75. CAB TEST indicator flashes, 15 indicator turns off and 30 indicator turns on. 2-6 SM6477 UNION SWITCH & SIGNAL (1) d. Measure decoding currents from the 75, 120 and 180 phone jacks. 75 must be between 21 to 32 mA. 120 and 180 below 2mA. Set CODE TESTER to 120. CAB TEST indicator flashes, 30 indicator turns off, 45 indicator turns on. (1) e. Measure decoding currents from 75, 120 and 180 phone jacks. 120 must be between 21 to 32 mA, and 75 and 180 below 2mA. Set CODE TESTER to 180. CAB TEST indicator flashes, 45 indicator turns off. MAS indicator turns on. (1) 2.3.4.2 Measure decoding currents from 75, 120 and 180 phone jacks. 180 must be between 21 to 32 mA, and 75 and 120 below 2mA. B-Car Controlled Cab Signal Testing a. If the alarm is sounding momentarily depress ACK to silence. Set the PTU switches in the following positions: • PTU - ON, BA - OFF, MODE - NORMAL, LEAD - B-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY, •CODE TESTER SELECTOR - N.C., CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. 15 indicator is on. Set CODE TESTER to 75. CAB TEST indicator flashes, 15 indicator turns off and 30 indicator turns on. c. Set CODE TESTER to 120. CAB TEST indicator flashes, 30 indicator turns off and 45 indicator turns on. d. Set CODE TESTER to 180. CAB TEST indicator flashes, 45 indicator turns off and MAS indicator turns on. 2. 3. 4. 3 Decoder Dropaway Timing Delay Measurements 2.3.4.3.1 a. 180 Decoder (-1207 PCB) Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., •CODE TESTER SELECTOR - 180, CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. 2-7 SM6477 UNION SWITCH & SIGNAL b. MAS indicator is on. Allow at least 30 seconds operation. Momentarily press TIMER RESET button. TIMER display should read 00.00. c. Set code tester ON/OFF switch to OFF. TIMER will begin measuring the instant that the switch is toggled and stop when 15 indicator turns on. (1) d. 2.3.4.3.2 a. Final time displayed must be between 2.4 to 3.3 SEC. Momentarily press ACK. button to silence the alarm. 120 Decoder (-1206 PCB) Set the PTU switches in the following positions: BA - OFF, MODE - NORMAL, •PTU - ON, MASTER CONTROLLER - MAX. BRAKE, •LEAD - A-CAR, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., CODE TESTER - ON, •CODE TESTER SELECTOR - 120, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF, b. 45 indicator is on. Allow at least 30 seconds operation. Momentarily press TIMER RESET pushbutton. TIMER display should read 00.00. c. Set CODE TESTER ON/OFF switch to OFF. TIMER will begin measuring the instant switch is toggled and stop when 15 indicator turns on. (1) d. 2.3.4.3.3 a. Final time displayed must be between 2.4 to 3.3 SEC. Momentarily press the ACK. button to silence the alarm. 75 Decoder (-1205 PCB) Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, •LEAD - A-CAR, MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., •CODE TESTER SELECTOR - 75 CODE TESTER - ON •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. 30 aspect is on. Allow the system to operate at 75 code for at least thirty seconds before continuing. Momentarily press the TIMER RESET Button. TIMER display should read 00. 00. 2-8 SM6477 UNION SWITCH & SIGNAL c. Set the CODE TESTER ON/OFF switch to OFF. TIMER will begin measuring the instant switch is toggled and stop when 15 indicator turns on. (1) d. 2.3.4.4 a. Final time displayed must be between 2.3 to 3.3 SEC. Momentarily press ACK. button to silence the alarm. Ack.Pen.Dly.Timing Measurement (ATC & ATS Cutouts Both In Normal) Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR ACK. PEN. DLY., •CODE TESTER SELECTOR - 75, CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. 30 aspect is on. Momentarily press TIMER RESET button. TIMER display should read 00.00. c. Set CODE TESTER ON/OFF switch to OFF, and DO NOT acknowledge when the alarm sounds. TIMER will begin measuring the instant alarm sounds, and stop when SBR relay deenergizes. The SBR followed by the EBR indications turn off. d. The final time must be between 5.00 to 5.74 SEC. e. Momentarily press the ACK. button to silence the alarm. The SBR and EBR indications turn on. 2.3.4.5 a. Failure To Acknowledge Brake Application Tests Ensure the PTU switches are set in the following positions: • PTU - ON, BA - OFF, MODE - NORMAL, LEAD - OFF •MASTER CONTROLLER - POWER, •TIMER FUNCTION SELECTOR - ACK.PEN.DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FREQUENCY KNOB -FULLY CLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. Key in A-Car MASTER CONTROLLER, and set to MAX. BRAKE. Charge the brakes. c. On the PTU, PK, VZ, SBR, EBR, and 15 indicators are on. 2-9 SM6477 UNION SWITCH & SIGNAL d. Set CODE TESTER to 180. MAS aspect is on. Momentarily press TIMER RESET button. TIMER display should read 00.00. e. Set CODE TESTER ON/OFF switch to OFF, and DO NOT acknowledge when the alarm sounds. (1) PTU and A-CAR alarm sounds. (2) TIMER will begin measuring the instant alarm sounds, and stop when SBR relay deenergizes. The SBR indication turns off. (3) After 5.00 to 5.74 second delay PTU's SBR indication turns off followed by the EBR indicator turning off followed by an EMERGENCY brake application. f. The final time PTU displays must be between 5.00 to 5.74 SEC. g. Momentarily press the ACK. button to silence the alarm. The SBR and EBR indications turns on. h. Key out the A-CAR MASTER CONTROLLER. SPEEDOMETER CALIBRATION (ATC & ATS CUTOUTS BOTH IN NORMAL) 2.3.5 a. Verify that both the A & B car speedometers read zero. Set the PTU switches in the following positions: NOTE If a meter is not zeroed remove the ADU's Lexan® cover, and adjust the screw in the center of the meter's dial to zero the unit. •PTU - ON, BA - ON, MODE - NORMAL, •LEAD - A-CAR, MASTER CONTROLLER - MAX.BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., •CODE TESTER SELECTOR - N.C. CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - 300 TO 2.1 KHz, •FLUKE METER side mounted ON/OFF SWITCH - ON. b. Set WHEEL WEAR SWITCH on the M6 Cab Signal/ATC cardfile to the position that corresponds to the diameter of the wheels on the axle the ATC senses for speed. c. Set the FLUKE meter to read DC current, 2mA scale. Connect the FLUKE meter to the SPD jack on the M6 rack. d. Adjust the PTU FREQUENCY knob until the Fluke meter reads 1.000ma ± 0.002ma. Rack's speedometer drive is within calibration if PTU's frequency meter reading is within 2-10 SM6477 UNION SWITCH & SIGNAL the appropriate wheel diameter range of the following table. WHEEL DIAMETER 32.5 32 31.5 31 30.5 30 29.5 29 SPD CAL RANGE 1800 1840 1829 1869 1858 1898 1888 1928 1920 1960 1952 1992 1985 2025 2020 2060 e. Verify both A & B car speedometers read 120 ±3 MPH. ATC SYSTEM TESTING (ATC & ATS CUTOUTS BOTH IN NORMAL) 2.3.6 2.3.6.1 a. VZ Test No Motion Detection Point Set the PTU switches in the fol lowing posit ions: LEAD - A-CAR, •PTU - ON, BA - ON, MODE - NORMAL, •MASTER CONTROLLER - MAX.BRAKE, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. 2.3.6.2 a. Adjust FREQUENCY knob fully counterclockwise. Set RANGE switch to 10 to 60 Hz. Slowly turn FREQUENCY knob clockwise, VZ indicator is off. Continue turning FREQUENCY knob clockwise until, VZ indicator turns on then off again. Second time VZ indicator turns off OSCILLATOR meter must read less than 45 Hz. Restricting Aspect Overspeed Point Testing Set the PTU switches in the following positions: LEAD- A-CAR, •PTU - ON, BA - OFF, MODE - NORMAL, •MASTER CONTROLLER - MAX.BRAKE, •TIMER FUNCTION SELECTOR - OS.PWR.CUT DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •FREQUENCY KNOB - FULLY COUNTER CLOCKWISE, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. If PTU alarm sounding momentarily press the ACK button. Momentarily press TIMER RESET button. The TIMER display should read 00.00. Set NO/MOTION OSCILLATOR RANGE to 60 to 500 HZ. c. Slowly adjust FREQUENCY knob clockwise alarm sounds. Observe: 2-11 SM6477 UNION SWITCH & SIGNAL WHEEL DIAMETER RANGE 2.3.6.3 a. (1) OVERSPEED indicator lights. Timer begins counting and stops when PK relay drops. Final TIMER reading must be between 2.00 to 2.72 SEC. (2) The PK followed by the SBR then EBR indicators on the PTU extinguish. (3) Per following table, oscillator frequency reading should be within the appropriate range of the WHEEL DIAMETER setting of the M6 rack's WHEELWEAR SWITCH. 32.5 32 31.5 31 30.5 30 28.5 28 228 273 231 277 235 282 239 286 243 291 247 296 251 301 255 306 75 Code 30 MPH Aspect Overspeed Point Testing Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, •LEAD - A-CAR, MASTER CONTROLLER - MAX.BRAKE, •TIMER FUNCTION SELECTOR - OS.PWR.CUT DLY. •CODE TESTER SELECTOR - 75, CODE TESTER - ON, •FREQUENCY KNOB - FULLY COUNTER CLOCKWISE, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. If PTU alarm sounding momentarily press the ACK button. 30 indicator is on. Momentarily press TIMER RESET button on the PTU. TIMER display should read 00.00. Set NO/ MOTION OSCILLATOR RANGE SW. to 300 to 2.1 KHz. c. Slowly adjust FREQUENCY knob clockwise until the alarm sounds. Observe: (1) OVERSPEED indicator turns on. Timer begins counting and stops when PK relay drops. Final TIMER reading must be between 2.00 to 2.72 SEC. (2) PK followed by the SBR then EBR indicators turn off. (3) Per the following table, OSCILLATOR reading should be within the appropriate range of the WHEEL DIAMETER setting of the M6 rack's WHEELWEAR SWITCH. 2-12 SM6477 UNION SWITCH & SIGNAL WHEEL DIAMETER RANGE 2.3.6.4 a. 32.5 32 31.5 31 30.5 30 29.5 29 455 501 462 508 470 516 477 525 485 533 493 542 501 551 510 561 120 Code 45 MPH Aspect Overspeed Point Testing Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX.BRAKE, •TIMER FUNCTION SELECTOR - OS.PWR.CUT DLY., •CODE TESTER SELECTOR - 120, CODE TESTER - ON, •FREQUENCY KNOB - FULLY COUNTER CLOCKWISE, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. If PTU alarm sounding momentarily press the ACK button. 45 indicator is on. Momentarily press the TIMER RESET button. The TIMER display should read 00.00. Set NO/ MOTION OSCILLATOR RANGE SW. to 300 to 2.1 KHz. c. Slowly adjust FREQUENCY knob clockwise until alarm sounds. Observe: WHEEL DIAMETER RANGE 2.3.6.5 a. (1) OVERSPEED indicator is on and TIMER begins counting and stops when PK relay drops. Final TIMER reading must be between 2.00 to 2.72 SEC. (2) The PK followed by the SBR then EBR indicators on the PTU extinguish. (3) Per the following table, OSCILLATOR frequency should be within the appropriate range of the WHEEL DIAMETER setting of the M6 rack's WHEELWEAR SWITCH. 32.5 32 31.5 31 30.5 30 29.5 29 683 728 693 740 704 751 716 763 727 776 740 789 752 802 765 816 180 Code, MAS Aspect Overspeed Testing Ensure the PTU switches are set in the following positions: • PTU - ON, BA - OFF, MODE - NORMAL, •MASTER CONTROLLER - MAX. BRAKE, 2-13 LEAD - A-CAR, SM6477 UNION SWITCH & SIGNAL •TIMER FUNCTION SELECTOR - OS.PWR.CUT DLY., •CODE TESTER SELECTOR - 180, CODE TESTER - ON, •FREQUENCY KNOB - FULLY COUNTER CLOCKWISE, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. If PTU alarm sounding momentarily press the ACK button. MAS indicator is on. Press TIMER RESET button. TIMER display should read 00.00. Set NO/MOTION OSCILLATOR RANGE SW. to 300 to 2.1 KHz. c. Slowly adjust FREQUENCY knob clockwise until alarm sounds. Observe: WHEEL DIAMETER RANGE 2.3.6.6 a. (1) OVERSPEED indicator on. TIMER begins counting and stops when the PK relay drops. Final TIMER reading must be between 2.00 to 2.72 SEC. (2) The PK followed by the SBR then EBR indicators on the PTU extinguish. (3) Per the following table, the OSCILLATOR frequency should be within the appropriate range of the WHEEL DIAMETER setting of the M6 rack's WHEELWEAR SWITCH. 32.5 32 31.5 31 30.5 30 28.5 28 1386 1441 1417 1464 1440 1487 1463 1511 1487 1536 1512 1561 1537 1588 1564 1615 ATC Penalty Delay Timing Measurement Ensure the PTU switches are set in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - OS.PEN.DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER •NO MOTION/OVERSPEED OSCILLATOR RANGE - 10 •FREQUENCY KNOB -FULLY CLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - A-CAR, - OFF, to 60Hz, OFF. b. If PTU alarm sounding momentarily press the ACK button. Momentarily press TIMER RESET button. The TIMER display should read 00.00. c. Set the RANGE switch to 60 to 500Hz. Alarm sounds, and TIMER begins measuring. TIMER stops when the SBR relay deenergizes. SBR and EBR indications turn off. 2-14 SM6477 UNION SWITCH & SIGNAL d. Final time displayed must be between 5.00 to 5.72 SEC. e. Set PTU RANGE switch to OFF to silence the alarm. The VZ, PK, SBR and EBR indications turn on. 2.3.6.7 a. Emergency Brake Delay Timing Measurement. Ensure the PTU switches are set in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - SERV. BRK. TO EMER. BRK. DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FREQUENCY KNOB -FULLY CLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. If PTU alarm is sounding momentarily press the ACK button on the PTU. Momentarily press the TIMER RESET button on the PTU. TIMER display should read 00.00. c. Set RANGE switch to 60 to 500Hz. Alarm sounds, and TIMER begins measuring when the SBR indication turns off, and stops when the EBR indication turns off. d. Final time displayed must be between 1.65 to 2.25 SEC. e. Set the RANGE switch to OFF to silence the alarm. The PTU's VZ, PK, SBR and EBR indications turn on. 2.3.6.8 a. BA Forestalling Test Ensure the PTU switches are set in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - OS.PEN.DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FREQUENCY KNOB -FULLY CLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. If PTU alarm sounding momentarily press the ACK button. Momentarily press TIMER RESET button. The TIMER display should read 00.00. c. Set the RANGE switch to 60 to 500Hz. OVERSPEED indicator turns on. TIMER begins measuring. Instant ALARM sounds set BA switch to ON. Observe, alarm silences and timer 2-15 SM6477 UNION SWITCH & SIGNAL continues running. PK indicator turns off but SBR and EBR remain on. d. After timer exceeds 30 seconds set BA to off. SBR then EBR indicators turn off. e. Ensure the PTU switches are set in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - SERV. ERK.TO EMER. BRK DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FREQUENCY KNOB -FULLY CLOCKWISE, •FLUKE ME'l'ER side mounted ON/OFF SWI'PCH - OFF. f. Momentarily press TIMER RESET button. The TIMER display should read 00.00. g. Set the RANGE switch to 60 to 500Hz. OVERSPEED indicator turns on. PK indicator turns off. Instant SBR indicator turns off set BA switch to ON, alarm silences and timer is running. EBR indicator remains on. h. After timer exceeds 30 seconds set BA to OFF. EBR indicator turns off. 2.3.6.9 a. Reverse Mode ATC Tests Ensure the PTU switches are set in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - OS.PWR.CUT.DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FREQUENCY KNOB -FULLY COUNTERCLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. If PTU alarm is sounding momentarily press the ACK button. Momentarily press the TIMER RESET button on the PTU. The TIMER display should read 00.00. c. Set the PTU's MODE switch to REVERSE and observe the 15 indicator turns off and the INOP indicator turns on. Set RANGE switch to 300 to 2.1 KHz and adjust the FREQUENCY KNOB until alarm sounds. Observe the TIMER begins and then stops when PK indicator turns off. The PK followed by the SBR and EBR indications extinguish. 2-16 SM6477 UNION SWITCH & SIGNAL (1) WHEEL DIAMETER RANGE Oscillator frequency reading should be within the appropriate range of the WHEEL DIAMETER setting of the cardfile's WHEELWEAR SWITCH. 32.5 32 31.5 31 30.5 30 29.5 29 1213 1259 1233 1279 1252 1299 1272 1320 1293 1347 1315 1364 1337 1387 1360 1411 (2) Final time displayed must be between 2.00 to 2.72 SEC. d. Set RANGE switch to OFF to silence the alarm. The PTU's VZ, PK, SBR and EBR indications turn on. e. Set FUNCTION SELECTOR to ACK. PEN.DLY., and momentarily press TIMER RESET button. Set CODE TESTER switch to 75. The 30 indicator turns on and alarm sounds. TIMER begins measuring instant the alarm sounds, and stops when the SBR relay drops. SBR and EBR indications turn off. f. Final time displayed must be between 5.00 to 5.72 SEC. g. Momentarily press the ACK. button, and observe the alarm continues. h. Set the CODE SELECTOR switch to the 120. On the PTU the 30 indicator turns off and the 45 indicator illuminates. The alarm continues to sound. i. Set CODE SELECTOR to 180. The 45 indicator turns off and the MAS indicator turns on. The alarm continues to sound. j. Set PTU's MODE switch to NORMAL. Alarm silences, INOP indicator turns off, and the SBR and EBR indicators turn on. 2.3.6.10 ATC System Brake Application Tests a. On the A-CAR, ensure the ATC & ATS CUT OUT switches are in the NORMAL positions. b. Ensure the PTU switches are set in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - OFF, •MASTER CONTROLLER - POWER, •TIMER FUNCTION SELECTOR - OS.PEN.DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FREQUENCY KNOB -FULLY CLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - OFF. 2-17 SM6477 UNION SWITCH & SIGNAL c. Key in A-Car MASTER CONTROLLER, and set to MAX. BRAKE. Charge the brakes. d. On the PTU, PK, VZ, SBR, EBR, and 15 indicators are on. e. Momentarily press TIMER RESET button. TIMER display should read 00.00. f. On the PTU, set RANGE to 300 to 2.1 KHz. (1) PTU and A-CAR alarm sounds, OVERSPEED indicator turns on followed by PK indicator turning off. (2) After 5.00 to 5.72 second delay PTU's SBR indicator followed by EBR indicator turn off. Car applies an EMERGENCY brake application. (3) Key out the A-CAR MASTER CONTROLLER. 2.3.7 MASTER CONTROLLER COMPARITOR TEST (ATC & ATS CUTOUTS BOTH IN NORMAL) NOTE Before performing this test ensure the brake system is in an Emergency brake application. a. Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - OFF, •MASTER CONTROLLER - POWER, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY, •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. Key in A-Car MASTER CONTROLLER and set to MAX. BRAKE. Step master controller from MAX. BRAKE thru P4. At each step observe MSTR. CONT. indicator on PTU. MAX. BRAKE thru COAST indicator on. Pl thru P4 indicator off. c. Key out A-Car MASTER CONTROLLER and key in B-car MASTER CONTROLLER. Step master controller from MAX. BRAKE thru P4. At each step observe MSTR.CONT. indicator on PTU. MAX. BRAKE thru COAST indicator on. Pl thru P4 indicator off. d. Ensure both the A-CAR and B-CAR MASTER CONTROLLERS are keyed out. 2.3.8 ATC CHECK TEST SWITCH TESTS. NORMAL.) a. (ATC & ATS CUTOUTS BOTH IN Set the PTU switches in the following positions: 2-18 SM6477 UNION SWITCH & SIGNAL BA - OFF, MODE - NORMAL, LEAD - OFF, •PTU - ON, •MASTER CONTROLLER - POWER, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY, •CODE TESTER SELECTOR - 180., CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - 60 to 500 Hz •FREQUENCY ADJUST KNOB - FULLY CLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. In the A-Car cab, key in the MASTER CONTROLLER and set to FORWARD and MAX. BRAKE. Momentarily depress the ACKNOWLEDGE button in the cab if the alarm is sounding. On the ADU, the GREEN aspect is lit and the OVERSPEED indicator is extinguished. c. In the cab, depress the ATC CHECK switch. The alarm sounds and the ADU's OVERSPEED indicator lights. Release the ATC CHECK SWITCH when the OVERSPEED indicator begins to flash. d. Key out the MASTER CONTROLLER and in the B-CAR cab, key in the MASTER CONTROLLER and set to FORWARD and MAX. BRAKE. Momentarily depress the ACKNOWLEDGE button in the cab if the alarm is sounding. On the ADU, the GREEN aspect is lit and the OVERSPEED indicator is extinguished. e. In the cab, depress the ATC CHECK switch. The alarm sounds and the ADU's OVERSPEED indicator lights. Release the ATC CHECK SWITCH when the OVERSPEED indicator begins to flash. f. Ensure both the A-CAR and B-CAR MASTER CONTROLLERS are keyed out. 2.3.9 -4002 PCB DELAY a. (ATC & ATS CUTOUTS BOTH IN NORMAL) Set the PTU switches in the following positions: •PTU - ON BA - OFF, MODE - NORMAL, LEAD - B-CAR, •MASTER CONTROLLER - BRAKE, •TIMER FUNCTION SELECTOR - 4002 DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. Momentarily press TIMER RESET button. TIMER display should read 00.00. c. Set BA switch to ON. TIMER begins instant BA is switched and stops when PK indicator turns off. 2-19 SM6477 UNION SWITCH & SIGNAL (1) 2.3.10 a. Final time displayed must be between 55 to 85 SEC. -4003 PCB DELAY (ATC & ATS CUTOUTS BOTH IN NORMAL) Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - B-CAR, •MASTER CONTROLLER - BRAKE, •TIMER FUNCTION SELECTOR - 4003 DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. b. VZ indicator is on. Momentarily press TIMER RESET button. TIMER display sLould read 00.00. c. Set MASTER CONTROLLER to the POWER position. TIMER begins measuring instant controller is switched and stops when SBR indicator turns off. (1) 2 . 3 . 11 Final time displayed must be between 9 to 18 SEC. ATC CUTOUT TESTS a. On the A-CAR, set the ATC CUT OUT switch to CUT OUT. b. Set the PTU switches in the following positions: •PTU - ON, MOM. PRESS ACK PUSHBUTTON, BA - OFF, •MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - 4002 DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF. c. Set PTU's CODE TESTER to ON & CODE SELECTOR to 75. CAB TEST indicator flashes, 15 indicator turns off and 30 indicator turns on. d. Set CODE TESTER to 120. CAB TEST indicator flashes, 30 indicator turns off, 45 indicator turns on. e. Set CODE TESTER to 180. CAB TEST indicator flashes, indicator turns off. MAS indicator turns on. f. Set CODE TESTER to 120. CAB TEST indicator flashes, MAS indicator turns off and 45 indicator turns on. g. Momentarily press ACK. button to silence the alarm. 2-20 45 SM6477 UNION SWITCH & SIGNAL h. Set CODE TESTER to 75. CAB TEST indicator flashes, 45 indicator turns off and 30 indicator turns on. i. Momentarily press ACK button to silence the alarm. j, Set the PTU switches in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - A-CAR, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - ACK. PEN. DLY., •CODE TESTER SELECTOR - 75, CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. k. 30 aspect is on. Momentarily press TIMER RESET button. TIMER display should read 00.00. 1. Set CODE TESTER ON/OFF switch to OFF, and DO NOT acknowledge when the alarm sounds. TIMER will begin measuring the instant alarm sounds, and stop when SER relay deenergizes. The SER followed by the EBR indications turn off. m. The final time must be between 5.00 to 5.74 SEC. n. Momentarily press the ACK. button to silence the alarm. The SER and EBR indications turn on. o. Ensure the PTU switches are set in the following positions: •PTU - ON, BA - OFF, MODE - NORMAL, LEAD - OFF, •MASTER CONTROLLER - POWER, •TIMER FUNCTION SELECTOR - OS.PWR.CUT.DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FREQUENCY KNOB - FULLY COUNTERCLOCKWISE, •FLUKE METER side mounted ON/OFF SWITCH - OFF. p. Key in A-Car MASTER CONTROLLER, and set to MAX. BRAKE. Charge the brakes. q, On the PTU, PK, VZ, SER, EBR, INOP and 15 indicators are on. On the A-Car ADU INOPER indicator on, 15 aspect on. r. On the PTU, set RANGE to 300 to 2.1 KHz, and adjust FREQUENCY knob clockwise until oscillator output greater than 1500 Hz. 2-21 SM6477 UNION SWITCH & SIGNAL s. 2. 3 . 12 (1) No alarm sounds, OVERSPEED indicator turns on followed by PK indicator turning off. (2) On A-Car cab ADU, the INOPER indicator is on. The brakes may be released, and no emergency application occurs. Set ATC CUTOUT switch to NORMAL. PTU and A car alarm sounds. After 5 to 6 second delay PTU's SBR indicator flashes followed by an EMERGENCY brake application. ATS CUTOUT TESTS a. On the A-CAR, set the ATC & ATS cutout switches to CUTOUT. b. Set the P'l'U switches in the tollowing positions: BA - OFF, MODE - NORMAL, LEAD - OFF, •PTU - ON, •MASTER CONTROLLER - POWER, •TIMER FUNCTION SELECTOR - DECODER DROPAWAY DLY, •CODE TESTER SELECTOR - N.C., CODE TESTER - ON, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - OFF. c. Key in A-Car MASTER CONTROLLER and set to MAX. BRAKE. Charge the brakes. On the A-Car ADU, INOPER indicator on, 15 aspect on. d. On the PTU, PK, VZ, SBR, EBR, INOP and 15 indicators are on. Set CODE TESTER to 75. CAB TEST indicator flashes, 15 indicator turns off and 30 indicator turns on. e. Set CODE TESTER to 120. CAB TEST indicator flashes, 30 indicator turns off and 45 indicator turns on. f. Set CODE TESTER to 180. CAB TEST indicator flashes, 45 indicator turns off and MAS indicator turns on. g. Set code tester ON/OFF switch to OFF. h. (1) Alarm does not sound when the MAS indicator turns off and the 15 indicator turns on. SBR AND EBR indicators turn off. (2) In A-Car cab, no alarm sounds, ADU's INOPER indicator on. Brakes may be released, and no emergency application occurs. Set ATC and ATS CUT OUT switches to NORMAL. PTU and A car alarm sounds, ADU's INOPER indicator turns off. EMERGENCY brake application occurs. 2-22 SM6477 UNION SWITCH & SIGNAL i. 2. 3 .13 a. Momentarily press the ACK. button to silence the alarm. The SBR and EBR indicators turn on. Insure the A-Car MASTER CONTROLLER is in MAX. BRAKE. ON-BOARD TESTER CALIBRATION Use the M6 CODE TEST SET and test loop. (1) Position a cab signal test loop on the rails under the A-Car track receivers. (2) Key in the A-Car Master Controller and place the REVERSER in FORWARD. (3) Connect the cab signal test loop to the LOOP OU'.c'PUT plug on the M6 CODE TEST SET. (4) Connect the M6 CODE TEST SET'S power to 100 ac power. (5) Set the CODE TEST SET's switches to the following positions: NOTE: INPUT POWER switch is a circuit breaker. •INPUT POWER - ON (Note: If switch trips, test set is defective) . •CODE SELECT - STEADY •LOOP OUTPUT LEVEL - HIGH •CARRIER LEVEL 100 HZ ADJUST - Adjust until unit's meter reads 2 ±.05 amps. b. Set the PTU switches in the following positions: •PTU - ON BA - OFF, MODE - NORMAL, LEAD - OFF, •MASTER CONTROLLER - MAX. BRAKE, •TIMER FUNCTION SELECTOR - 4002 DLY., •CODE TESTER SELECTOR - N.C., CODE TESTER - OFF, •NO MOTION/OVERSPEED OSCILLATOR RANGE - OFF, •FLUKE METER side mounted ON/OFF SWITCH - ON. c. Using the PTU multimeter set to AC volts, measure across the green and brown test points on the -1601 card in the M6 rack and record (HIGH MEASUREMENT). Set the loop current to 1 ±.05 amp. steady by adjusting the CARRIER LEVEL 100 HZ ADJUST knob on the M6 CODE TEST SET, and measure the AC voltage across the green and brown test points (LOW MEASUREMENT) and record. 2-23 SM6477 UNION SWITCH & SIGNAL d. Turn the M6 CODE TEST SET off. On the M6 cardfile set LOCAL TEST Sw. to 100 HZ and CURRENT sw. to HIGH. In the cardfile on -3502 card adjust R35 (bottom potentiometer) until the AC voltage measured on the -1601 card's green and brown test points equals the HIGH MEASUREMENT measured in step c. e. On the M6 cardfile set LOCAL TEST SW. to 100 HZ and CURRENT SW. to LOW. On -3502 card adjust R33 (second from top) until the AC voltage measured on the -1601 card's green and brown test points equals the LOW MEASUREMENT measured in step c. f. ON the M6 cardfile set the LOCAL TEST SW. to OFF. 2-24 SM6477 UNION SWITCH & SIGNAL SECTION Ill FUNCTIONAL OPERATION 3.1 GENERAL The major functional areas of the PTU are the display printed circuit (P.C.) board, a tester P.C. board and its associated front panel mounted controls, and the front panel mounted cab controls. Each of these functional areas are described in the following paragraphs. Refer to Figure 3-2, PTU schematic, Figure 3-3, Tester P.C. Board schematic, and Figure 3-4, Display P.C. Board schematic, as required, while reading the following descriptions. An overall functional diagram of the PTU is shown in Figure 3-1. 'J'he 32 vdc power required by the PTU is supplied by the M6 rack that the PTU is connected to during operation. Pin A of the plus connector is the positive(+) 32 vdc and pin Bis the negative(-) 32 vdc. The 32 vdc is distributed to the various circuits within the PTU by the PTU ON/OFF switch. 3.2 DISPLAY P.C. BOARD The display P.C. board contains the 13 LED indicators that are visible through the faceplate. Each indicator contains two parallel LED circuits for reliability and for continued operating in a partial failure of the indicator. These indicators are connected to the P.C. board plus connector and monitor the various functions of the M6 cab signal/ATC system and PTU. All indicators are referenced to the common of the system. P.C. board plug connector pin 22 is connected to the PUSH TO TEST switch on the PTU. When the PUSH TO TEST SWITCH is pressed, 32 vdc is applied to pin 22 and causes the 13 indicators to light. 3.3 TESTER P.C. BOARD The Tester P.C. board contains four electronic circuit functions which are: a. Code Tester - direct injection type, manual code selection, 100 Hz carrier at 180, 120, 75 and NO CODE. Used in the PTU to verify the operation of the M6 cab signal system. b. 9 Vdc Isolated Power Supply - used to power the PTU multimeter. c. Oscillator - used to test the M6 overspeed system. d. Timer Triggers - used to debounce the relay interlock inputs into the PTU timer. Each of the four electronic circuit functions are described in the following paragraphs. 3-1 SM6477 UNION SWITCH & SIGNAL 3.3.1 Code Tester Circuit The code tester circuit consists of a 100 Hz carrier code rate generator on the tester P.C. board and on the PTU front panel the rotary five position double pole CODE TESTER selector switch and the CODE TESTER ON/OFF toggle switch. The code tester circuit operates when the PTU ON/OFF switch and CODE TESTER selector switch are both in the ON position. The CODE TESTER selector switch is a three pole switch that controls the following: POLE 1- ON position enables coded output to the receiver bars in the M6 system. POLE 2- ON position enables power to the code tester. OFF position enables the start trigger in decoder dropaway timing measurements. POLE 3-0N position enables 32 volt power into the M6 system track receivers for code generation. The code tester circuit generates the following codes: CODE TESTER Selector Switch Position Code Output 1 Steady 100 Hz 2 No Code 3 72 ± 2 Code 4 123 ± 2 Code 5 184.5 ±2 Code Input power from the CODE TESTER ON/OFF switch to the tester P.C. board connector J2 pin 14 provides the input 32 vdc to IC US and it's associated components. IC US is a 32 to 15 vdc regulator that provides operating power for the code tester circuit. IC US and it's associated components comprise the code rate generator of the code tester circuit. The RC time constant between pins 1 and 2 of US determine the code rate. This RC time constant is determined by the position of the CODE TESTER selector switch. IC U6 and it's associated components comprise the 100 Hz carrier oscillator. The output code rate of IC US at pin 8, gates the 100 Hz output of IC U6 at the selected code rate. The output of IC US also drives the LED drivers Ql and QS. The 100 Hz output of IC U6 at pin 8 controls current source transistor Q2. Q2 drives the track receivers during cab signal testing. When the CODE TESTER selector switch is placed in the STEADY position, 15 vdc is connected to J2 pin 5. This inhibits the code 3-2 SM6477 UNION SWITCH & SIGNAL rate generator IC US and allows the 100 Hz oscillator IC U6 to operate continuous. When the CODE TESTER selector switch is placed in N.C. position, 15 vdc is connected to connector J2 pin 5 and inhibits the code rate generator IC US and 100 Hz oscillator IC U6 operation. 3.3.2 9 VDC Isolated Power Supply IC Ul is a 18 to 32 vdc input to 24 vdc isolated output power supply. IC Ul is powered when the PTU is connected to an operational M6 system and the PTU ON/OFF switch is set to ON. The isolated 24 vdc output of IC Ul, pins 3(+) and pin 4(1), is connected to IC U4. IC U4 is a regulator configured with it's associated components to provide a 9.25 ± 0.25 vdc output across connector Jl pins 19 and 18. This 9.25 vdc output is used to power the PTU multimeter. 3.3.3 No Motion Overspeed Oscillator The no motion overspeed oscillator consists of a variable oscillator, and on the PTU's front panel a potentiometer for variable frequency control and a three pole, 4-position, rotary switch for frequency range selection. The no motion overspeed oscillator operates when the PTU ON/OFF switch is ON and the NO MOTION/OVERSPEED OSCILLATOR RANGE switch is not in the OFF position. This oscillator is powered by the 32 vdc connected to connector J2 pin 1 and the common buss of the tester P.C. board. IC U9 is a function generator that provides a sine wave output at it's output, pin 2. The rate that IC U9 oscillates at is determined by the capacitor value connected to IC U9 pin 9 and the resistance value connected across the tester P.C. board connector J2 pins 19 and 3. This resistance value is determined by the front panel mounted FREQUENCY control. The oscillator has four ranges manually selected by the front panel mounted RANGE switch. These ranges are OFF, 10 to 60 Hz; 60 TO 500 Hz; and 300 to 2.lK Hz. The sine wave output of IC U9 is connected to a IC UlO, which provides the gain for driving a load consisting of a 3040A speed sensor connected to shaper limiter P.C.B. N451570-5002. The square wave output of IC U9 is connected to the tester P.C. board connector J2 pin 7 and is the input to the NO MOTION/OVERSPEED OSCILLATOR Hz indicator (frequency counter) at pin 8. 3.3.4 Timer and Timer Triggers Circuit The timer circuit is powered when the PTU is connected to an operational M6 system and the PTU ON/OFF switch is set to ON. The timer circuit consists of a INTERNATIONAL MICROTRONICS MODEL 270 timer, a start/stop trigger circuit, and the front panel mounted FUNCTION SELECTOR switch and TIMER RESET pushbutton switch. The timer circuit FUNCTION SELECTOR double pole, rotary switch is connected to the various trigger inputs in the PTU and M6 system. When a position is selected the appropriate start/stop inputs are 3-5 SM6477 UNION SWITCH & SIGNAL connected to the timer trigger inputs on the tester P.C. board. The TIMER RESET momentary pushbutton switch is a double pole switch. This switch has two functions. When the switch is pressed, one function is to reset the timer triggers by applying 15 vdc to the Timer Reset input at connector Jl pin 25 on the tester P.C. board. The other function is to reset the TIMER display to zero by connecting pin 15 of the 270 timer to common when the switch is pressed. IC Ull is a 15 vdc regulator used to power IC U2. IC U2 contains four NOR gates that are configured to create two separate relay interlock debounce circuits. These debounce circuits generate the start and stop triggers for the PTU TIMER. When the TIMER RESET push-button switch is pressed the timer start input (ANODE D8) is reset to high (15 vdc) and the stop trigger output (ANODE D9) is set low (common). Setting either trigger HIGH, turns on optical isolator J3 and pulls the timer start/stop input at connector J2 pin 8 to common. This prevents the PTU TIMER from counting. When a 32 vdc start input is applied to connector Jl pin 26, the start trigger toggles to low, J3 turns off and the PTU TIMER begins to count. When a 32 vdc stop input is applied to connector Jl pin 25, the stop input toggles high, J3 turns on, and the input into the TIMER pin 10 toggles to low which prevents the TIMER from counting. 3.4 CAB CONTROLS Mounted on the PTU front panel are several controls that duplicate the interface from the car to the M6 system to the PTU. This feature eliminates the need, when testing, to operate the controls in the A-car or B-car cabs. These controls operate when the PTU ON/OFF switch is set to ON. These controls are: a. MASTER CONTROLLER switch - A three position, rotary switch that interfaces to the BRAKE and MAX BRAKE inputs in the M6 system. The A-car and B-car MASTER CONTROLLERS must be keyed out for proper testing using this switch. When testing using the A-CAR or B-CAR MASTER CONTROLLERS with the PTU connected, this switch must be in the POWER position for proper operation. This switch when in the MAX. BRAKE position energizes the MBK relay in the M6 system. When the switch is in the BRAKE position, this switch energizes the controller input to the M6 system's 2703 card. When this switch is in the POWER position it is open circuit to the M6 system. b. BA Toggle Switch - This switch interfaces to the BA relay in the M6 system, and energizes the BA relay when the switch is in the ON position. c. ACK Pushbutton Switch - This switch interfaces the acknowledging switch input of the M6 system and allows acknowledgement of more restrictive aspect changes from the PTU. 3-6 SM6477 UNION SWITCH & SIGNAL d. MODE Toggle Switch - This switch duplicates the operation of the MODE switches in the A & B car cabs. This switch allows testing of NON SIGNAL territory operation from the PTU by energizing the M6 system MODE relay when the switch is placed in the ON position. e. LEAD Toggle Switch - This switch is a three position, toggle switch (A-CAR, center off, and B-CAR). This switch controls the appropriate ACL (A-CAR LEAD) or BCL (B-CAR LEAD) relay in the M6 system. This enables A-CAR or B-CAR interface testing from the PTU. 3-7 SM6477 UNION SWITCH & SIGNAL This page intentionally left blank 3-8 SM6477 UNION SWITCH & SIGNAL EE ~ NO MOTION OVERSPEED OSCILLATOR -= ~~ ·--·---------------------------·--------<>• ------------------------------------------<>B I FREQUENCY COUNTER ~ ~ (i) © (i) 0 ® ® C) (!, (9) ® ® ® ") 09 ® I IOK .---'V·v·~+==~ JSV ~ A56 l~M7~ ~Jc· he---·~ c ! :I J 150 HuF R4B Cl ,-"•>A.!',-•_-,1 I J ~<>O tty- --<>E "'' .. IOOX " ... "" I IN4007 POSITION l•OFF NO MDTION/OVERSPEED l,---<2:=r------1--------~ OSCIU./ITOfl SW. 2~10 TO 60 HZ ON/OFF fMNGE (Si'/3) ~~ n.1 3•60 TO 500 HZ J-- 4• 300 TO 2. 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(Sheet 3 of 3) M6 PTU Test Set Schematic Diagram SM6477, 3-13/3-14 UNION SWITCH & SIGNAL -;---;e~-,:, . 51 STARI TAIGGfR ,ll!fJ,MIP WY'ilorn ~~.,---,~:;:~,-T~--,-r- 1 HC\4001 04 STOP TRIGGfA "' R24 ~ !N4001 20~ '] !5 VOLT OUT " COHM ~ a . . . -----------'W\r R\9 ------------= ·- ~~ 1.0.0. !/OW U l 4/0K ~ \N9U~ ~ -~;~'c:---------------<:a,:;~ ~ ~ D . l/8W!X R!6 ix A5 1.8.0. 1/8W ll R!4 "'' 00 "" ~·-~- "'" ~ - - - - - - - - - - - - - - < n c m ~ I X 1.8.0. 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NO. ~51807, Figure 3 -3 Tester PC Board · · ram Schematic Diag SMG477, 3-15/3-16 D "" Gl z 0 -"- Ul a, . 0 _---.J U) I ~--· -- ' MAS 5 1 1 . 1.8K " 7 8,, ,,6 R2 ~"~LNHL .., __ :,¥ (D - -"- -n - l I - - - ' 5 6 1 8 ' YcLLuWHLM 45 MPH : I r , 4 I 5 I I' 30 MPH I_ 7 '' I I 1 ·- 1 8 - 7 - '- 3 . 4 1 1 5 6 ·. . 1.5!( I ·-°'. 1N4007 " - "' " ,, 0'5 i.BK R16 1N~Oo1 I " 8 ·-',L~· LM. ___ .. 019 i.8K 1N4007 R16 020 v . 1 " 7 A :i OVERSPEEO LEOS 3 1 5 6 ' . I i.BK 1N~Oo1 R11 07 1.BK 1N~Oo1 08 8 1' R10 7 . ,A I 1.SK MSTR. CONT. ' 5 6 2 8 7 - ,A j .SK 1W R5 ,_ ,CLL..,nt-iLM cA 1N40o7 I i.SK INOP. LEDS 3 1 5 6 R13 06 1.8K 1N40o7 1W 7 R12 . .A .c:LLUWti~M. __ :,_ SBR LE013 3 1.1/1 2 ' _6 5 EBR ' - 5 ,6 '~ 7 f-'· lQ ,:; I 'I 5, ,....,6 12 8. l11 41 ....,3 ! . .,..,5 r; w Ci) '."" I () t:I ::r en (D s f-'· Ul 'O :s: "' ~ "' ... .... :" O> • 'd t:I () f-'· ~ PJ c3 '< rt f-'· "' () tJj O • r; "' ~ PJ r; lQ :3 0, ,;23 011 Yl i J.W.BK CAB TEST i . 5' 5 '",. 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L, _:_:-C~M •LLLW'" 15 MPH - 1 LED3 .3 .6 I I -1 I i I j .SK LED2 ,,_ 01 hi .\J.01 . lN~007 016 v, rn~Oo1 ~ R9 09 -V\ 1.5K JN(OQ7 017 010 ~ ~ " R15 1.5K " I ~ '!N(OQ? 1 t 1N4007 c 018 0 ~ z z ~ ::; () :,: "'"'ci z )> r EE UNION SWITCH & SIGNAL SECTION IV PTU TESTING AND CALIBRATION 4.1 GENERAL This section contains the procedures to test and calibrate the PTU. 4.2 PTU TESTING AND CALIBRATION The PTU should be tested foi proper operation and calibrated at least once a year. The digital multimeter should be calibrated per the manufacturer's (Fluke) Instruction Manual. The timer and frequency counter are crystal oscillator controlled devices and are manufactured by: International Microtronics Corporation Ottotek Div. 4016E Tennessee St. Tucson, AZ 85715 602-790-2808 The timer and frequency counter have no calibration adjustments. These units either pass or fail the tests. In the event of an after warranty failure of the timer or frequency counter, contact the manufacturer listed above. To verify that the frequency counter is operating properly, perform the frequency counter and overspeed oscillator tests. To verify that the timer is operating properly, perform the timer test. After performing the frequency counter and overspeed oscillator tests and the timer test, perform the code tester tests, and display tests. Successful completion of all these tests insures that the PTU is operating properly. 4.2.1 Frequency Counter and Overspeed Oscillator Tests Perform the frequency counter and overspeed oscillator tests as follows: a. Connect PTU interface connector pin A to (+) and pin B to (-) of a 30-32 Vdc supply. Connect a separate frequency counter (NOTE: the PTU's Fluke Meter frequency counter may be used.) and oscilloscope to PTU connector pins 1 and B. NOTE The frequency counter of the multimeter may be used as the separate frequency counter required in the step below. 4-1 SM6477 UNION SWITCH & SIGNAL b. Connect a separate frequency counter and oscilloscope to PTU connector pins 1 and B. c. Set the DC power supply to 31 to 32 vdc and set the PTU ON/OFF switch to ON. Set the NO MOTION/OVERSPEED OSCILLATOR RANGE switch to 10 to 60 Hz. Adjust the NO MOTION/OVERSPEED OSCILLATOR FREQUENCY control until the PTU NO MOTION/OVERSPEED OSCILLATOR Hz indicator reads 50 Hz. The separate frequency counter should read between 49 and 51 Hz. The oscilloscope should display a sine wave at an amplitude of 12 volts to 18 volts peakto-peak. d. Set the NO MOTION/OVERSPEED OSCILLATOR RANGE switch to 60 to 500 Hz. Adjust the NO MOTION/OVERSPEED OSCILLATOR FREQUENCY control until the NO MOTION/OVERSPEED OSCILLATOR Hz indicator reads 100 Hz. The separate frequency counter should read between 99 and 101 Hz. The oscilloscope should display a sine wave at an amplitude of 12 volts to 18 volts peak-to-peak. Repeat this procedure at 100 Hz increments to 500 Hz. e. Set the NO MOTION/OVERSPEED OSCILLATOR RANGE switch to 300 to 2.1 KHz. Adjust the NO MOTION/OVERSPEED OSCILLATOR FREQUENCY control until the NO MOTION/ OVERSPEED OSCILLATOR Hz indicator reads 300 Hz. The separate frequency counter should read between 299 and 301 Hz. The oscilloscope should display a sine wave at an amplitude of 12 volts to 18 volts peak-to-peak. Repeat this procedure at 100 Hz increments to 2.1 KHz. 4.2.2 Timer Test Perform the timer test as follows: a. Set the PTU ON/OFF switch to OFF. b. Set the PTU's ON/OFF switch to OFF. Connect PTU interface connector pin A to (+) and pin B to (-) of a 30-32 Vdc supply. Connect a toggle switch (SWl) to switch PTU connector pin N to A. Connect a second toggle switch (SW2) to switch PTU connector pin M to A. c. Set the DC power supply to 31 to 32 vdc. Set the PTU ON/ OFF switch to ON. Set the PTU FUNCTION SELECTOR switch to the SERV. BRK TO EMER. DLY. position. Set oscilloscope to store a single sweep that is triggered when SWl closes. Connect the oscilloscope to measure the voltage across the timer connector pins 10 (+)and 12 ( - ) . d. On the PTU, momentarily depress the TIMER RESET pushbutton. 4-2 SM6477 UNION SWITCH & SIGNAL e. Close SWl and observe that TIMER begins counting. When the PTU TIMER reads in excess of 5 seconds close SW2. Observe that the TIMER stops counting. f. Observe that the oscilloscope displays a 5 ±0,5 volt trace that was on when SWl was high and SW2 was off. Measure the time that the oscilloscope trace was high. This time MUST be within ±0.1 seconds of the time displayed on the TIMER. 4.2.3 Code Tester Tests Perform the code tester tests as follows: a. Set the PTU ON\OFF switch to OFF. b. Set the PTU's ON/OFF switch to OFF. Connect PTU interface connector pin A to(+) and pin B to(-) of a 30-32 Vdc supply. c. Set the PTU ON/OFF switch to ON. Set the CODE TESTER ON/OFF switch to ON. On the 9501 board connect a DC voltmeter across capacitor C9. Observe that DC voltmeter indicates 15 ±0.5 vdc. Connect an external 5.lK ohm load to PTU connector pins Kand J. d. Set the CODE TESTER selector switch to the STEADY position. Set the multimeter to Hz. Connect the multimeter across the external 5.lK ohm load resistor (pin K is positive). A frequency of 100 ±2 Hz should be measured. If the frequency is not within tolerance, locate R47 on the 9501 board in the PTU. Remove resistor R47 and install a decade resistor in it's place. Increase the decade resistor value until the counter reads 100 ±0.5 Hz. Solder in R47 position a standard value resistor that is closest to the final decade resistor value. e. Set the multimeter to read AC RMS volts and measure the voltage across the external 5.lK ohm load resistor. Observer that multimeter reading is between 420 mV-460mV ac. If the voltage is out of tolerance, adjust R38 (R38 is the blue variable resistor on the 9501 board) for a multimeter reading between 420 mV-460 mV ac. f. Set the CODE SELECTOR selector switch to the 75 position. Observe that the CAB TEST indicator flashes at the code rate. Connect an oscilloscope high lead to the 9501 board diode Dll cathode and low lead (common) to PTU input pin B (Dll is located to the left of the blue variable resistor). Observe that oscilloscope displays a square wave with a period between 0.810 to 0.857 seconds (70 to 74 code). If the waveform is out of tolerance, install a decade resistor in place of resistors R3 an R4 on the 9501 board. Adjust the decade resistor value to set the period of the displayed waveform to 0.833 ±0.005 seconds. Solder in R3 and R4 positions two resistors whose 4-3 SM6477 UNION SWITCH & SIGNAL combined value equals the decade resistor value closest. g. Set the CODE TESTER selector switch to the 120 position. Observe that the CAB TEST display flashes at the code rate. Connect an oscilloscope high lead to the 9501 board diode Dll cathode and low lead (common) to PTU input pin B (Dll is located to the left of the blue variable resistor.). Observe that oscilloscope displays a square wave with a period between 0.480 to 0.496 seconds (121 to 125 code). If the waveform is out of tolerance, install a decade resistor in place of resistors R12 an R13. Adjust the decade resistor value to set the period of the displayed waveform to 0.488 ±0.005 seconds. Solder in place of R12 and R13 position two resistors whose combined value equals the decade resistor value closest. h. Set the CODE TESTER selector switch to the 180 position. Observe that the CAB TEST display flashes at the code rate. Connect an oscilloscope high lead to the 9501 board diode Dll cathode and low lead (common) to PTU input pin B (Dll is located to the left of the blue variable resistor). Observe that oscilloscope displays a square wave with a period between 0.322 to 0.329 seconds (182.5 to 186.3 code). If the waveform is out of tolerance, install a decade resistor box in place of resistors R18 an R19. Adjust the decade resistor value to set the period of the displayed waveform to 0.325 ±0.005 seconds. Solder in R18 and R19 positions two resistors whose combined values equals the decade resistor value closest. 4.2.4 Display Tests Perform the display tests as follows: a. Connect 32 vdc power supply common (-) lead to PTU connector pin Band the positive (+) lead to PTU connector pin E. Observe that the MAS indicator lights. b. Move the power supply positive(+) lead to PTU connector PTU connector pin D. Observe that the 45 indicator lights. c. Move the power supply positive(+) lead to PTU connector pin C. Observe that the 30 indicator lights. d. Move the power supply positive(+) lead to PTU connector pin F. Observe that the 15 indicator lights. e. Move the power supply positive(+) lead to PTU connector pin H. Observe that the INOP indicator lights. f. Move the power supply positive(+) lead to PTU connector pin b. Observe that the OVERSPEED indicator lights. g. Move the power supply positive(+) lead to PTU connector pin U. Observe that the MSTR CONT indicator lights. 4-4 SM6477 UNION SWITCH & SIGNAL h. Move the power supply positive(+) lead to PTU connector pin d. Observe that the VZ indicator lights. i. Move the power supply positive(+) lead to PTU connector pin L. Observe that the BA indicator lights. j. Move the power supply positive(+) lead to PTU connector pin h. Observe that the PK indicator lights. k. Move the power supply positive(+) lead to PTU connector pin f. Observe that the SBR indicator lights. 1. Move the power supply positive(+) lead to PTU connector ping. Observe that the EBR indicator lights. 4.2.5 Leakage Test Procedure This test will check for isolation between the PTU control panel and the 36-pin connector plug. On the Portable Test Unit, disconnect the power plug on the side of the multimeter; this allows the meter to operate from the internal battery. Turn the meter on and set to read MQ scale. Connect the supplied 36-pin cable harness to the PTU. With the multimeter, measure the resistance from each pin of the 36-pin connector to the PTU chassis and all exposed switches. The meter should indicate "OL" for all tests. While connecting the meter, the display may jump to some reading less than "OL"; this is normal, as long as the "OL" reading returns after making the connection. While conducting this test, do not touch the ends of the probes with your fingers as this can cause a false reading. This test should be performed annually. 4-5 SM6477 UNION SWITCH & SIGNAL This page intentionally left blank 4-6 SM6477 UNION SWITCH & SIGNAL SECTION V PARTS LIST 5.1 GENERAL This section contains the PTU Test Set, Tester P.C. Board, and Display P.C. Board parts list and component location diagrams. 5-1 SM6477 UNION SWITCH & SIGNAL Parts List for M6 PTU Test Set N451400-4301 (See Figure 5-1) ITEM 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 185 190 195 DESCRIPTION PTU TEST SET (COMPLETE) Case, Fiberglass Panel Assembly, PTU Multimeter, Digital, 8060A Switch, Rotary, 1 Amp Switch, Pushbutton, SPDT Switch, Rotary, 1 Amp Switch, Toggle, DPDT Switch, Rotary, 2 Deck Switch, Toggle, SPS1 Switch, Toggle, DPDT Switch, Pushbutton, DPDT Knob, Round, 90-2WD-2 Potentiometer, 20K ohms, 10 Turn Knob, Alco, Knurl Sonalett, 30-120 Vde Receptacle, Back Panel Mount Timer, Stop Watch Counter, Frequency Plug, DC Power Grommet, Rubber, 9/32 ID P.C. Board, Display P.C. Board, Tester Label, PTU Tag, Nameplate, US&S Screw, SST 6-32X3/8, Pan Hd Standoff, Hex, M/F, 1-5/8" Washer, SST, Plate, No. 6 Washer, SST, Lock No. 6 Nut, No. 6-32, SS, Elastic Stop Screw, SST 8-32 x 1/2", Pan Hd Washer, SST, Plate, No. 8 Washer, SST, Lock, No. 8 Screw, No. 10-32 x 1", Pan Hd Washer, SST, Plate, No. 10 Washer, SST, Lock No. 10 Angle, Pan Mount Cable, Intetface Bar, Slide Bar, Fixed 5-2 PART NO. N451400-4301 10784480007 N4516126202 J6209210011 J7257070191 17257070221 17257070410 17257070454 17257070464 17257070465 17257070468 J583291 1770564 J6208500132 1770571 1705057024 17262720005 J6209210013 J6209210012 17091460697 J5781390003 N4518079401 N4518079501 M4516126301 J4516651901 ]5072980106 17259200054 J4751200108 J4751210107 1048102 J5072950108 J4751200109 J4751210108 ]5072960116 J4751200110 J4751210109 J023073 N4518051301 M4516126203 M4516126204 SM6477 UNION SWITCH & SIGNAL Parts List for M6 PTU Test Set N451400-4301 (Continued) ITEM 200 205 210 215 220 225 230 235 240 245 250 255 260 265 280 285 290 295 300 305 310 315 DESCRIPTION Bracket, Top Bracket, Bottom Sleeve, Crimp Reduction Terminal, Pre-insulated, Dia. G Wire, #22AWG, ETFE, White Tie, Cable, Self Locking Tubing Connector, Receptacle, HDP-20 Retainer, Male Screw Battery, 9 V, Alkaline Shim, Sponge Rubber ' Screw, SST, 6-32 x 1/2", Pan Hd Switch, 3PDT, 5 Amp Cable, PHN Panel Test Clips, Alligator, Fluke Nut, No. 8-32, SS, Elastic Stop Base, Wire Tie Screw, No. 6-32x 1/2", SS Washer, No. 8, Nylon Clip, Burndy, HP-SN Tag,PTU Rivet, 1/S"Dia., St!., Pop 5-3 PART NO. M4516126205 M4516126206 J774239 J730049 A0457790009 J703302 A774199 J7091460391 J507357 J7051850018 A750060 J5072980108 J7257070469 N4516126401 J7005220001 J048080 J7040330001 J5252730108 J475139 J700590 M4516128702 J490034 SM6477 UNION SWITCH & SIGNAL This page intentionally left blank 5-4 SM6477 UNION SWITCH & SIGNAL 200 I ' J:IIB!l ~~ 235 120 210 55 15 c::::J"' 100 95 50 20, 60 230 235 ~/a=t:mkc::::J/ I ,,-,, I 260 DETAIL "A" ASSEMBLY OF WIRE MAlE (PIN) OR FEMAlE (SOCKET}. TYPICAL 105 115 ASSEMBLY FOR "22 GAUGE WIRE. ASSEMBLY OF 116 GAUGE 235, 240 (SEE DETAIL "B") WJRE 'NO" REDUCTION SLEEVE (ITEM 210) IS REQUIRED, 240 DETAIL "8" 35 ~ 270 275 NO MOTION OVERSPEED OSCILLATOR ©©© 190 " 195 I{tJ~m~rn:m:I H, 65, 70 135, 140, 190 80 85 150, 155,1600 195 190 90 145 190 80, 140, 145, 255, 210, 215,220,225,230 75 125, 135, 140 10 25 40, 60 180 165, 170, 175 30, 55 60 20, 60 165. 170, 175 250 VIEW SHOWING SLIDE BARS OPfN FOR INSTALLATION OR REMOVAL OF METERS. VIEW SIIOWJNG TIMER ANO OSCILLATOR METERS INSTALLED. 205 120 110 TIMER COUNTER - -' --- / / SHOAJIN!l CONNECTOR Pl.MEDAS IND!CATW ON TIMER ME!fR, SHORTING CONHECTOII -c I ~ I \ 0 0 0 0 0 0 I I OPEN : 0 t 6 ' . ' • --• ' ' -c I • ' 6 \ •' • BEFORE INSTALLING TIMER UNIT, REMOVE REAR CONNECTOR FROM THE UNIT ANO PUSH THE BOARD ASSEMBLY FROM THE CASE. SET THE SWITCHES IN ON THE BOARD AS SHOWN ABOVE. REINSTALL THE BOARD IN THE CASE WITH ITS CONNECTOR. 13 IS SHOWN IN CLOSED POSITION. ! \ I '- / ' 125, 140, 145 0 0 0 I / ' '- \ ·- 0 - ·-· - ' 0 0 0 I .I '- 6 / / I \ ' ' D' • • • DD D ' PlACEO A8 INOICATED OM FAEQUEMCY METEII. '- ' DD ' 3 • D D OPHI • • , 6 0 -· - t •' • • / ' • - • , 6 I 0 / 130 ' ' 3 75 235, 85 240 135 • (SEE DETAIL "B") 140, 145 5 310, Shop Head Inside )15 • • BEFORE INSTALLING FREQUENCY UNIT, REMOVE REAR CONNECTOR FROM THE UNIT AND PUSH THE BOARD ASSEMBLY FROM THE CASE. SET THE SWITCHES IN ON THE BOARD AS SHOWN ABOVE. REINSTALL THE BOARD IN THE CASE WITH ITS CONNECTOR. #3 IS SHOWN IN OPEN POSITION. FRONT VIEW OF HANDLE, LATCHES, AND ATTACHMENT OF TAG. (Not to same scale) DWG. NO. 451400-43 Figure 5-1. M6 PTU Test Set, Part No. N4514004301 Component Location Diagram SM6477, 5-5/ 5-6 UNION SWITCH & SIGNAL Parts List for Tester P.C. Board N451807-9501 (See Figure 5-2) ITEM Cl C2, C7, C9, Cll, C15 C3 C4 C5, CS C6 ClO, Cl4 Cl2 Cl3 Dl, D2, D4, D6, D7, DlO, Dll, Dl3, Dl4, Dl6, Dl7 D3, D5 DS, D9 Dl2, Dl5 JI, J2 LEDl QI Q2-Q5 RIB, R47 R2 R3-RJO, Rl2-Rl6, Rl8,Rl9 Rll Rl7 R20,R23,R24 R21,R25,R26 R22 R27 R28 R29 R30 R31 R32 R33, R35, R55, R56,R59 R34, R45, R46, R58 R36 R37, R41, R42, R44 R38 R39 R40 DESCRIPTION PART NO. Capacitor, 1 Mfd., 50 vdc ±5% Capacitor, 47 Mfd. ±10% J7091450431 J706419 Capacitor, 0.1 Mfd., 100 vdc ±1% Capacitor, 0.001 Mfd., 100 vdc ± 1% Capacitor, 0.33 Mfd., 50 vdc ±20% Capacitor, 0. I Mfd., 100 vdc ±2% Capacitor, 0.33 Mfcl., 50 vdc ±20% Capacitor, I Mfd., 200 vdc ±5% Capacitor, 0.033 Mfcl., 50 vdc ±20% Diode, 1N4007, Silicon Rectifier J579634 J579635 J7091450486 J7091450256 J7091450486 J7091450401 J706417 J723912 Diode, Zener, IN5350A Diode, 1N914A, Silicon, Switching Diode, IN4740A, I watt Connector, Plug, HDP-20 Diode, LED, Red Transistor, Sihcon, NPN, 2N2270 Transistor, Silicon, NPN, 2N3117 Resistor, lOOK ohms, 1/4 watt ±5% Resistor, 34.SK ohms, 1/8 watt ± 1% Resistor, 16.9K ohms, 1/8 watt ±1 % J7261500115 J726031 J726080 J7091460390 J7261500219 J731186 J7313980079 J735137 J735421 J735076 Resistor, Resistor, Resistor, Resistor, Resistor, Resistor, Resistor, Resistor, Resistor, Resistor, Resistor, Resistor, J7355190141 J735116 J735054 J735405 J735063 J7355190126 J735217 J720894 J735050 J7355190060 J7355190474 J735053 21.5K ohms, 1/8 watt ± 1% 14K ohms, 1/8 watt± 1% 20K ohms, 1/4 watt ±5% 510K ohms, 1/4 watt ±5% l.5K ohms, 1/4 watt ±5% 470K ohms, 1/4 watt ±5% 200 ohms, 1/4 watt ±5% 100 ohms, 1 watt ±5% 100 ohms, 1/4 watt ±5% 240 ohms, 1/4 watt ±5% l.37K ohms, 1/8 watt± 1% lOK ohms, 1/4 watt ±5% lOOK ohms, 1/4 watt ±5% J735137 Resistor, 270K ohms, 1/4 watt ±5% Resistor, 30K ohm, 1/4 watt ±5% J735243 J735068 Potentiometer, ZOOK ohms, 1/2 watt± 10% Resistor, 47K ohms, 1/4 watt ±5% Resistor, 43K ohms, 1/4 watt ±5% J6208500123 J735035 J735172 5-7 SM6477 UNION SWITCH & SIGNAL Parts List for Tester P.C. Board N451807-9501 (Continued) ITEM DESCRIPTION PART NO. R43 R48 R49 R50, R52 R51 R53 R54 R57 R60 TPI-TP3 Ul U2 U3 U4 U5, U6 U7 US, Ul I U9 UlO Resistor, 2K ohms, 1/4 watt ±5% Resistor, 36K ohms, 1/4 watt ±5% Resistor, 15.SK ohms, 1/8 watt± 1% Resistor, 4.75K ohms, 1/8 watt ±1% Resistor, 150 ohms, 1/4 watt ±5% Resistor, 15K ohms, 1/4 watt ±5% Resistor, 1 ohm, 2 watt ±5% Resistor, 4. 7K ohms, 1/4 watt ±5% Resistor, 698 ohms, 1/8 watt± 1% Test Point, Orange Converter, DC-DC, 18 to 32 Input Integrated Circuit, CMOS 4001 Integrated Circuit, HllBI/CLI-10 IntegTated Circuit, LM317T Integrated Circuit, CMOS, 14541BC Integrated Circuit, CMOS, 4049UB Integrated Circuit, MC78L15ACG Integrated Circuit, 8038 Gen/Os Integrated Circuit, 741 Op-Amp Terminal, Solder, Non-insulated (for R3, R4, R6, R7, R9, RlO, Rl2, Rl3, Rl5, Rl6, Rl8, Rl9) Pad, Transistor Mounting, No. 10032 (for Ql, US, Ull) Pad, 7717-7 DAP (For Q2-Q5) Heat Sink, T0-220AI (for U4) Screw, 4-40 x 3/8, RHD, STL (for U4) Washer, No. 4, STL, Lock, MED (for U4) Nut, 4-40, Hex, Steel (for U4) Screw Lock Assembly (for U4) Board, P.C, Tester J735048 J735094 J7355190235 J735124 J735158 J735061 J7355190202 J735034 J7355190776 J713828 J7095570010 J7150290089 J7150290174 J7150290346 J7150290144 J7150290141 J7150290299 J7150290386 J7150290429 J7313990029 - 5-8 J792072 J792437 J7925080033 J525074 J047765 J480006 J507358 J776616729 SM6477 UNION SWITCH & SIGNAL MDI Uf UM PCB, TESTER N451807·9!01 8/11!- U1 ~ @US&SI D1 AEV, 188·8 J1 D J1 l J2 ASSEMBLY OF FEW.LE 8CAEWLOCK6 TO J1 l J2, TYPICAL (2) PLACES EACH CONNECTOR, VIEW SHOWING MOUNTING OF U4 TO HEAT61NK illlO PAINTED CIRCUIT ~D. Figure 5-2. Component Location Diagram for Tester P.C. Board N4518079501 5-9 SM6477 UNION SWITCH & SIGNAL Parts List for Display P.C. Board N451807-9401 (See Figure 5-3) ITEM Dl-D28 JI LED!, LED3 LED2, LED4, LEDS, LED7, LEDS, LED10-LED14 LED6, LED9 RI, R2, R5-R8, Rl0-R14, Rl6-R26 R3, R4, R9, Rl5 - - DESCRIPTION Diode, IN4007, Silicon Rectifier Connector, Plug, HDP-20 Diode, LED, Bar, Green Diode, LED, Yellow, 2755 PART NO 1723912 17091460390 17261500244 17261500250 Diode, LED, Bar, Red resistor, l.8K ohms, I watt 17261500245 1720785 Resistor, I.SK ohms, 1 watt 1720899 Board, P.C., PTU Display Screw Lock Asembly (for J !) 1776616728 1507358 5-10 SM6477 UNION SWITCH & SIGNAL r 1 I I f----, i. 1rnID ~~-J Ffffr ,-----,.J 4lJU_1.J_ LED2 I 1 I iL 0 i I © US&SI ~ .J ·~=~~~---__,,) (~-IIADE IN USA ... CCC. L ___ J LED:D ,D OLEOS D LED6 DLED7I_ - - , I I ,-- L ___ J I 20 -----------...':-==-/I 1- - - - - - - - - - - - - - - - - 1 LED:D, l9,L _________________ J ..S 37 rn=] 017 oc=J 018 f-11d :t 1ffgLLµfliio[]/ j[1{IBrii4Ju] 1 I 11 i..._...., L ___ J ore o;,o I S llljl le I I ~L..-,....a,-....,~ .___...., ~Is IS 1 . . . - ~ - .... -~ Q 1...-"il,-- .... N D NN cc ISS-B VIEW •A• J1 ASSEMBLY OF FEMALE SCREWLOCKS TO J1, TYPICAL (2) PLACES, Figure 5-3. Component Location Diagram for Display P.C. Board N451807-9401 5-11 SM6477