Transcript
BA-5 CHASSIS
SERVICE MANUAL MODEL
KV-24FV12 KV-24FV12 KV-25FV12 KV-25FV12A KV-25FV12C
881 Front.p65
1
COMMANDER
DEST
CHASSIS NO.
RM-Y168
US
SCC-S40C-A
RM-Y168
CND
SCC-S41C-A
RM-Y168
E
SCC-S38G-A
RM-Y168
E
SCC-S38H-A
RM-Y168
E
SCC-S38J-A
3/9/00, 2:20 PM
KV-24FV12/25FV12/25FV12A/25FV12C SPECIFICATIONS KV-25FV12 KV-25FV12A KV-25FV12C
KV-24FV12 120V, 60Hz
120-220V, 50/60Hz
Video 1)
2
2
S Video 2)
1
1
Audio 3)
2
2
Audio Out 4)
1
1
Headphone Out4)
1
1
10W x 2
10W x 2
150W
150W
1W
1W
652 x 524.3 x 467.3mm
652 x 524.3 x 467.3mm
25 2/3 x 20 2/3 x 18 5/12
25 2/3 x 20 2/3 x 18 5/12
Power requirements Number of inputs/outputs
Speaker output(W) Power Consumption(W) In use(Max) In standby Dimensions(W/H/D) (mm) (in) Mass
1) 2)
(kg)
37kg
37kg
(lbs)
81 lbs 9oz
81 lbs 9oz
1 Vp-p 75 ohms unbalanced, sync negative Y: 1 Vp-p 75 ohms unbalanced, sync negative C: 0.286 Vp-p (Burst signal), 75 ohms
3) 4)
500mVrms (100% modulation), impedance: 47kilohms More than 408 mVrms at the maximum volume setting (variable) More than 408 mVrms (fix)
Television system American TV standard/NTSC PAL M, N (KV-25FV12A ONLY)
Channel coverage VHF:2-13/UHF:14-69/CATV:1-125
Visible screen size 24” picture measured diagonally
Actual screen size 25” picture measured diagonally
Antenna 75 ohm external antenna terminal for VHF/UHF
Supplied accessories Remote Commander RM-Y168 Size AA (R6) batteries (2)
Optional accessories Connecting cables: VMC-810S/820S, VMC-720M, YC-15V/30V, RK74A U/V mixer EAC-66
Design and specifications are subject to change without notice.
—2—
KV-24FV12/25FV12/25FV12A/25FV12C TABLE OF CONTENTS Section
Title
Page
Warnings and Cautions ............................................................................................................................................................... 4 Self-Diagnostic Function ............................................................................................................................................................. 4 Safety Check-Out Instructions .................................................................................................................................................... 7
1. 2.
GENERAL ........................................................................................................................................................... 8 DISASSEMBLY 2-1. 2-2. 2-3. 2-4.
3.
SET-UP ADJUSTMENTS 3-1. 3-2. 3-3. 3-4. 3-5. 3-6.
4.
6-4.
Block Diagram ............................................................................................................................................................... 27 Circuit Board Location .................................................................................................................................................. 31 Printed Wiring Boards and Schematic Diagrams ......................................................................................................... 31 • A Board .................................................................................................................................................................... 33 • MB Board ................................................................................................................................................................. 39 • CB Board .................................................................................................................................................................. 45 • HZ Board .................................................................................................................................................................. 46 • K Board .................................................................................................................................................................... 47 • VB Board .................................................................................................................................................................. 48 Semiconductors ............................................................................................................................................................ 49
EXPLODED VIEW 7-1. 7-2. 7-3.
8.
Setting the Service Adjustment Mode .......................................................................................................................... 21 Memory Write Confirmation Method ............................................................................................................................. 21 Adjustment Buttons and Indicators ............................................................................................................................... 21 A Board Adjustments .................................................................................................................................................... 23
DIAGRAMS 6-1. 6-2. 6-3.
7.
R564 Confirmation Method (HV Hold-Down Confirmation and Readjustments) .................................................... 19 B+ Voltage Confirmation and Adjustment ..................................................................................................................... 19
CIRCUIT ADJUSTMENTS 5-1. 5-2. 5-3. 5-4.
6.
Beam Landing ............................................................................................................................................................... 15 Convergence ................................................................................................................................................................. 16 Focus ............................................................................................................................................................................. 17 Screen (G2) ................................................................................................................................................................... 17 Method of Setting the Service Adjustment Mode ......................................................................................................... 18 White Balance Adjustments .......................................................................................................................................... 18
SAFETY RELATED ADJUSTMENTS 4-1. 4-2.
5.
Rear Cover Removal ..................................................................................................................................................... 13 Chassis Assembly Removal ......................................................................................................................................... 13 Service Position ............................................................................................................................................................ 13 Picture Tube Removal ................................................................................................................................................... 14
Chassis (KV-24FV12 ONLY) ........................................................................................................................................ 50 Chassis (KV-25FV12A ONLY) ....................................................................................................................................... 51 Chassis (KV-25FV12/25FV12C ONLY) ........................................................................................................................ 52
ELECTRICAL PARTS LIST ................................................................................................................................................. 53
—3—
KV-24FV12/25FV12/25FV12A/25FV12C WARNINGS AND CAUTIONS CAUTION
ATTENTION!!
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.
APRES AVOIR DECONNECTE LE CAP DE L'ANODE, COURT-CIRCUITER L'ANODE DU TUBE CATHODIQUE ET CELUI DE L'ANODE DU CAP AU CHASSIS METALLIQUE DE L'APPAREIL, OU AU COUCHE DE CARBONE PEINTE SUR LE TUBE CATHODIQUE OU AU BLINDAGE DU TUBE CATHODIQUE.
WARNING!!
ATTENTION!!
AN ISOLATION TRANSFORMER SHOULD BE USED DURING ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BECAUSE OF LIVE CHASSIS. THE CHASSIS OF THIS RECEIVER IS DIRECTLY CONNECTED TO THE AC POWER LINE.
AFIN D'EVITER TOUT RESQUE D'ELECTROCUTION PROVENANT D'UN CHÁSSIS SOUS TENSION, UN TRANSFORMATEUR D'ISOLEMENT DOIT ETRE UTILISÉ LORS DE TOUT DÉPANNAGE. LE CHÁSSIS DE CE RÉCEPTEUR EST DIRECTEMENT RACCORDÉ À L'ALIMENTATION SECTEUR.
SAFETY-RELATED COMPONENT WARNING!!
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS, AND IN THE PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS SUSPECTED.
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE MARQUE SUR LES SCHEMAS DE PRINCIPE, LES VUES EXPLOSEES ET LES LISTES DE PIECES SONT D'UNEIMPORTANCE CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE DANS LE PRESENT MANUEL OU DANS DES SUPPLEMENTS PUBLIES PAR SONY. LES REGLAGES DE CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE PRESENT MANUEL. SUIVRE CES PROCEDURES LORS DE CHAQUE REMPLACEMENT DE COMPOSANTS CRITIQUES, OU LORSQU'UN MAUVAIS FONTIONNEMENT SUSPECTE.
SELF-DIAGNOSTIC FUNCTION The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to flash. The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
Diagnostic Test Indicators When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the LED will identify the first of the problem areas. Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
—4—
KV-24FV12/25FV12/25FV12A/25FV12C
Display of Standby/Timer LED Flash Count 2 times 4 times 5 times LED ON 0.3 sec.
STANDBY/TIMER LED
LED OFF 3 sec.
LED OFF 0.3 sec.
Diagnostic Item +B overcurrent Vertical deflection stopped White balance failure
Flash Count* 2 times 4 times 5 times
*One flash count is not used for self-diagnostic.
Stopping the Standby/Timer LED Flash Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER LAMP from flashing.
Self-Diagnostic Screen Display For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurrences of failure on the screen for confirmation.
To Bring Up Screen Test In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:
Display
Channel 5
Sound volume
Power ON
Note that this differs from entering the service mode (sound volume + ). Self-Diagnostic Screen Display
SELF DIAGNOSTIC 2: 0 3: N/A 0 4: 0 5: 1 101: N/A 0
Numeral “0” means that no fault was detected.
Numeral “1” means a fault was detected one time only.
—5—
KV-24FV12/25FV12/25FV12A/25FV12C
Handling of Self-Diagnostic Screen Display Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you have completed the repairs, clear the result display to “0”. Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs. Clearing the Result Display To clear the result display to “0”, press buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below: Channel 8
ENTER
Quitting the Self-Diagnostic Screen To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.
Self-Diagnostic Circuit
+B overcurrent (OCP)
Occurs when an overcurrent on the +B (135V) line is detected by pin 18 of IC1301 (MB Board). If the voltage of pin 18 of IC1301 (MB Board) is less than 1V when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.
I-Prot
Occurs when an absence of the vertical deflection pulse is detected by pin 17 of IC1001 (MB Board). Power supply will shut down when waveform interval exceeds 2 seconds.
IK
If the RGB levels* do not balance within 2 seconds after the power is turned on, this error will be detected by IC1301 (MB Board). TV will stay on, but there will be no picture. *(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).
—6—
KV-24FV12/25FV12/25FV12A/25FV12C SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
Leakage Test
1. Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder splashes and bridges. 2. Check the interboard wiring to ensure that no wires are “pinched” or touching high-wattage resistors. 3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely certain that you have replaced all the insulators.
6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer. 7. Check the B+ and HV to see if they are specified values. Make sure your instruments are accurate; be suspicious of your HV meter if sets always have low HV. 8. Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.
1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instructions. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.
4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement. 5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.
The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods.
3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low voltage scale. The Simpson’s 250 and Sanwa SH-63TRD are examples of passive VOMs that are suitable. Nearly all battery-operated digital multimeters that have a 2 VAC range are suitable (see Figure A). How to Find a Good Earth Ground A cold-water pipe is a guaranteed earth ground; the coverplate retaining screw on most AC outlet boxes is also at earth ground. If the retaining screw is to be used as your earth ground, verify that it is at ground by measuring the resistance between it and a cold-water pipe with an ohmmeter. The reading should be zero ohms. If a cold-water pipe is not accessible, connect a 60- to 100-watt troublelight (not a neon lamp) between the hot side of the receptacle and the retaining screw. Try both slots, if necessary, to locate the hot side on the line; the lamp should light at normal brilliance if the screw is at ground potential (see Figure B).
Trouble Light AC Outlet Box
Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage.
Figure B. Checking for earth ground.
—7—
GENERAL
The instructions mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers shown reflect those of the Operating Instruction Manual.
Connecting Your TV
Connecting Additional Equipment
Read this section before setting up your TV for the first time. This section covers basic connections in addition to any optional equipment you may be connecting.
TV and VCR Rear of TV
Basic Connections
2
TV with indoor or outdoor antenna, or CATV cable
VCR
Depending on the cable available in your home, choose one of the connections below:
1
Coxial Cable From cable/ antenna
—8—
3 (Optional connection)
1
Connect the coaxial cable from your TV antenna or cable service to the IN jack on your VCR.
2
Connect a coaxial cable (not supplied) from the OUT jack on your VCR to the VHF/UHF jack on the TV.
To watch video programs from your VCR, tune your TV to channel 3 or 4 (as set on the rear of your VCR).
(Optional connection)
3
If you are connecting to an indoor or outdoor antenna, you may need to adjust the orientation of the antenna for best reception.
3
4
If your VCR is equipped with video outputs, you can get better picture quality by connecting A/V cables (not supplied) from AUDIO and VIDEO OUT on your VCR to AUDIO/VIDEO IN on your TV. You can use the inputs.
button to switch between the VHF/UHF and VIDEO
For optimum picture quality, use S VIDEO (if your VCR is equipped with the S VIDEO connection) instead of the yellow A/V cable. S VIDEO does not provide sound, the audio cables must still be connected.
KV-24FV12/25FV12/25FV12A/25FV12C
SECTION 1
TV and Cable Box
TV, VCR and Cable box Rear of TV
Cable Box
1
Coaxial Cable From cable
3 VCR
2
Coaxial Cable
2 Rear of TV Coaxial Cable
4 (Optional connection) Cable box
1 From cable
—9—
1
Connect the coaxial cable from your cable service to the IN jack on your cable box.
2
Connect a coaxial cable (not supplied) from the OUT jack on your cable box to the VHF/UHF jack on the TV.
Connect the coaxial cable from your cable service to the IN jack on your cable box.
2
Connect a coaxial cable (not supplied) from the OUT jack on your cable box to the IN jack on your VCR.
3
Connect a coaxial cable (not supplied) from the OUT jack on your VCR to the VHF/UHF jack on the TV.
To view channels from your cable box, tune your TV to channel 3 or 4 (as set on the rear panel of your cable box) and use the cable box’s remote control to change channels. If you will be controlling all channel selection through your cable box, you should consider using the Channel Fix feature, (see page 21).
(Optional connection)
4
5
If you will be controlling all channel selection through your cable box, you should consider using the Channel Fix feature, (see page 21).
6
If your VCR is equipped with video outputs, you can get better picture quality by connecting A/V cables (not supplied) from AUDIO and VIDEO OUT on your VCR to AUDIO/VIDEO IN on your TV. You can use the inputs.
button to switch between the VHF/UHF and VIDEO
For optimum picture quality, use S VIDEO (if your VCR is equipped with the S VIDEO connection) instead of the yellow A/V cable. S VIDEO does not provide sound, the audio cables must still be connected.
KV-24FV12/25FV12/25FV12A/25FV12C
1
TV, Satellite Receiver and VCR Satellite antenna cable
Rear of TV
2
From cable/ antenna
1
Rear of TV From cable/ antenna
4 VCR
Satellite receiver
1 Satellite antenna cable
SATELLITE IN
VHF/UHF AUDIO R AUDIO L VIDEO
SATELLITE IN
VHF/UHF AUDIO R AUDIO L VIDEO
2
AUDIO R AUDIO L VIDEO
IN OUT
LINE OUT
VHF/UHF
LINE IN
IN
IN
Satellite receiver
OUT
OUT
LINE OUT
LINE OUT
3 5 3
— 10 —
1
Connect the cable from your satellite antenna to SATELLITE IN on your satellite receiver.
2
Connect the coaxial cable from your cable service or antenna to the VHF/UHF jack on your TV.
3
Using A/V cables, connect AUDIO and VIDEO OUT on your satellite receiver to AUDIO and VIDEO IN on your TV.
You can use the inputs.
button to switch between the VHF/UHF and VIDEO
1
Connect the cable from your satellite antenna to SATELLITE IN on the satellite receiver.
2
Connect the coaxial cable from your cable service or antenna to the IN jack on your VCR.
3
Using a coaxial cable, connect the OUT jack on your VCR IN to the VHF/UHF jack on your TV.
4
Using A/V cables, connect AUDIO and VIDEO OUT on your satellite receiver to AUDIO and VIDEO IN on your VCR.
5
Using A/V cables, connect AUDIO and VIDEO OUT on your VCR to AUDIO and VIDEO IN on your TV.
For optimum picture quality, use S VIDEO (if your Satellite Receiver is equipped with the S VIDEO connection) instead of the yellow A/V cable. S VIDEO does not provide sound, the audio cables must still be connected.
7
8
To view from the satellite receiver or VCR, select the video input to which your satellite receiver or VCR is connected by pressing on the remote control.
KV-24FV12/25FV12/25FV12A/25FV12C
TV and Satellite Receiver
Using the Remote Control and Basic Functions
MTS/SAP
Cycles through the Multi-channel TV Sound (MTS) options: Stereo, Mono, and Auto-SAP (Second Audio Programming).
DISPLAY
Press to display the current time, (if set) and channel number.
This section shows you how to use the more advanced buttons on the remote control and how to use the on-screen menus.
Using the Remote Control
Cycles through available Steady Sound settings, (see page 19).
— 11 —
JUMP
Press when you want to turn connected equipment on and off.
Alternates between the last two channels selected with the 0 9 buttons.
GUIDE
FUNCTION
Press when you want to control connected equipment with your remote control.
Brings up the custom guide of your satellite receiver.
MENU
MUTING
Instantly turns off the sound. Press again or press to restore sound.
Displays the on-screen menu. Press again to exit the menu at any time.
RESET
Press to return to factory settings while in an on-screen menu.
CODE SET
SYSTEM OFF
Powers off all Sony equipment at once, (may not work with older equipment).
Use to program your remote control to operate connected video equipment, (see page 31).
TV/VIDEO
Cycles through available video inputs.
TV/VTR
Press when you are finished using a VCR and you want to switch to the TV input. Your VCR power will remain on.
Button
Description
POWER
PICTURE MODE
Cycles through the available Video Mode settings.
SLEEP
Turns the TV off automatically in approximately 15, 30, 45, 60, or 90 minutes. Cancel by pressing until SLEEP OFF appears. (continued)
11
12
KV-24FV12/25FV12/25FV12A/25FV12C
Moves the cursor in the on-screen menus. Press the arrow buttons to move the cursor, press the center button to select or access an option.
If you lost your remote control, see page 35.
If you are having a problem with your TV, try the suggestions below. If the problem persists, contact your nearest Sony dealer. No picture, no sound
— 12 —
Poor or no picture, good sound Good picture, no sound
No color Only snow appears on the screen
Dotted lines or stripes
Double images or ghosts
34
Make sure the power cord is plugged in. If a red light is flashing on the front of your TV for more than a few minutes, disconnect and reconnect the power cord to restore the TV. If the problem continues, call your local service center. Check the TV/VIDEO settings: when watching TV, set to TV; when watching video equipment, set to VIDEO (page 11). Make sure the batteries have been inserted correctly into the remote control (page 2). Try another channel, it could be station trouble. Adjust Picture in the Video menu (page 18). Adjust Brightness in the Video menu (page 18). Check the antenna and/or cable connections (page 3). Press so that MUTING disappears from the screen (page 11). Check your Audio settings. Your TV may be set to Auto-SAP (page 20). Adjust Color in the Video menu (page 18). Check the Cable setting in the Options menu under Setup (page 30). Check the antenna and/or cable connections (page 3). Make sure the channel selected is currently broadcasting. Adjust the antenna. Move the TV away from other electronic equipment. Some electronic equipment can create electrical noise, which can interfere with TV reception. Check your outdoor antenna or call your cable service.
KV-24FV12/25FV12/25FV12A/25FV12C
Troubleshooting
KV-24FV12/25FV12/25FV12A/25FV12C
SECTION 2 DISASSEMBLY
2-1. REAR COVER REMOVAL Rear Cover
Screw +BVTP 4x16
Screw +BVTP 4x16
Screw +BVTP 4x16
Screw +BVTP 4x16
Screw +BVTP 4x16
Screw +BVTP 4x16
2 Screws +BVTP 4x12
2-2. CHASSIS ASSEMBLY REMOVAL
Screw +BVTP 4x16
2-3. SERVICE POSITION
CB Board CB Board VB Board VB Board
Claw
A Board
HZ Board (KV-25FV12A ONLY)
MB Board MB Board K Board
K Board
— 13 —
A Board
KV-24FV12/25FV12/25FV12A/25FV12C
2-4. PICTURE TUBE REMOVAL WARNING: BEFORE REMOVING THE ANODE CAP
1
10
High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and CRT coated earth ground strap.
2
9
3
8 7 6
Coated Earth Ground Strap
5
4 Discharge the anode of the CRT and remove the anode cap.
6.
Loosen the deflection yoke fixing screw and remove.
2.
Unplug all interconnecting leads from the deflection yoke, neck assembly, degaussing coils and CRT grounding strap.
7.
Place the set with the CRT face down on a cushion and remove the degaussing coil holders.
3.
Remove the CB Board from the CRT.
8.
Remove the degaussing coils.
4.
Remove the chassis assembly.
9.
Remove the CRT grounding strap and spring tentioners.
5.
Loosen the neck assembly fixing screw and remove.
10. Unscrew the four CRT fixing screws [located on each CRT corner] and remove the CRT [Take care not to handle the CRT by the neck].
1.
ANODE CAP REMOVAL WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electrical shock, discharge the CRT before attempting to remove the anode cap. Short between anode and coated earth ground strap of CRT. NOTE:
After removing the anode, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon painted on the CRT.
REMOVAL PROCEDURES c b
a
Anode Button
1
Turn up one side of the rubber cap in the direction indicated by arrow a .
2
Use your thumb to pull the rubber cap firmly in the direction indicated by arrow b .
HOW TO HANDLE AN ANODE CAP 1
Do not use sharp objects which may cause damage to the surface of the anode cap.
2
To avoid damaging the anode cap, do not squeeze the rubber covering too hard. A material fitting called a shatter-hook terminal is built into the rubber.
3
Do not force turn the foot of the rubber cover. This may cause the shatter-hook terminal to protrude and damage the rubber.
— 14 —
3
When one side of the rubber cap separates from the anode button, the anode cap can be removed by turning the rubber cap and pulling it in the direction of arrow c .
KV-24FV12/25FV12/25FV12A/25FV12C SECTION 3 SET-UP ADJUSTMENTS The following adjustments should be made when a complete realignment is required or when a new picture tube is installed. These adjustments should be performed with rated power supply voltage unless otherwise noted.
Perform the adjustments in order as follows: 1. Beam Landing 2. Convergence 3. Focus 4. Screen (G2) 5. White Balance
Set the controls as follows unless otherwise noted:
Note: Test equipment required: • • • •
VIDEO MODE: STANDARD PICTURE control: ................ Normal BRIGHTNESS control: ........ Normal
3-1. BEAM LANDING
Color Bar Pattern Generator Degausser DC Power Supply Digital Multimeter
5. Move the deflection yoke forward and adjust so that the entire screen becomes green.
Before beginning adjustment procedure: 1. Degauss the entire screen. 2. Feed in the white pattern signal.
Adjustment Procedure 1. Input a raster signal with the pattern generator. 2. Loosen the deflection yoke mounting screw and set the purity control to the center as shown below.
Purity Control
6. Switch over the raster signal to red and blue and confirm the condition. 7. When the position of the deflection yoke is determined, tighten it with the deflection yoke mounting screw. 8. If landing at the corner is not right, adjust by using the disk magnets. Purity control corrects this area
3. Turn the raster signal of the pattern generator to green.
Disk magnets or rotatable disk magnets correct these areas (a-d)
4. Move the deflection yoke backward and adjust the purity control so that green is in the center and red and blue are at the sides evenly.
a
b
c
d
Deflection yoke positioning corrects these areas
Blue
Red
b d
Green
a
c
— 15 —
KV-24FV12/25FV12/25FV12A/25FV12C
3-2. CONVERGENCE
Horizontal Static Convergence
Before starting convergence adjustments:
If the blue dot does not converge with the red and green dots, perform the following:
1. Perform FOCUS, V.LIN AND V.SIZE adjustments.
1. Move BMC magnet (a) to correct insufficient H. Static convergence.
2. Set BRIGHTNESS control to minimum. 3. Feed in dot pattern.
2. Rotate BMC magnet (b) to correct insufficient V. Static convergence.
Vertical Static Convergence 1. Adjust V.STAT magnet to converge red, green and blue dots in the center of the screen (Vertical movement adjust V.STAT RV701 to converge).
3. After adjusting the BMC magnet, repeat Beam Landing Adjustment.
V-STAT
BMC MAGNET
PURITY
2. Tilt the V.STAT magnet and adjust static convergence to open or close the V.STAT magnet.
b When the V.STAT magnet is moved in the direction of arrows a and b, red, green, and blue dots move as shown below:
(1)
a
b
a
b
b B
B
G
G
R
R
(2) a
R
G B
B
G R
BMC magnet
b
Dynamic Convergence Adjustment Before performing this adjustment, perform Horizontal and Vertical Static Convergence Adjustment.
(3) b
a
1. Slightly loosen deflection yoke screw.
B
R
2. Remove deflection yoke spacers.
G
G b B
R
3. Move the deflection yoke for best convergence as shown on the following page.
— 16 —
KV-24FV12/25FV12/25FV12A/25FV12C
Perform adjustments while tracking items 1 and 2.
R B G R B G G B R G B R R G B
Screen-Corner Convergence
B G R
B G R R G B
1. Affix a permalloy assembly corresponding to the misconverged areas. b a
a
b
a-d: screen-corner misconvergence c B R G B R G G R B G R B
d
c d
4. Tighten the deflection yoke screw. 5. Install the deflection yoke spacers.
3-3. FOCUS TLH Plate Adjustment
1. Adjust FOCUS control for best picture.
1. Input crosshatch pattern. 2. Adjust PICTURE QUALITY to standard, PICTURE and BRIGHTNESS to 50%, and OTHER to standard. 3. Adjust the Horizontal Convergence of red and blue dots by tilting the TLH plate on the deflection yoke.
Focus (FV) Screen (G2)
3-4. SCREEN (G2) 1. Input a dots pattern. 2. Set the PICTURE and BRIGHTNESS controls at minimum and COLOR control at normal. 3. Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as shown below so that voltages on the red, green, and blue cathodes are 170 VDC.
BR (R)(B)
RB (B)(R)
TLH+ TLH-
170 VDC
Pedestal
Ground
4. Adjust XCV core to balance X axis. 5. Adjust YCH VR to balance Y axis. 6. Adjust vertical red and blue convergence with V.TILT (TLV VR).
4. Observe the screen and adjust SCREEN (G2) VR in FBT to obtain the faintly visible background of dot signal.
— 17 —
KV-24FV12/25FV12/25FV12A/25FV12C
3-5. METHOD OF SETTING THE SERVICE ADJUSTMENT MODE Service Mode Procedure 1. Standby mode (power off). 2. Display
Sound volume +
Channel 5
Power
on the Remote Commander (press each button within a second).
Service Adjustment Mode In 1. The CRT displays the item being adjusted. Disp. (Item) SERVICE
Item Data
HSIZ
0
2. Press
or
on the Remote Commander to select the item.
3. Press data.
or
on the Remote Commander to change the
4. Press
then
to save into the memory.
Service Adjustment Mode Memory Turn set off then on to exit service adjustment mode. SERVICE
WRITE
MUTING
Green
ENTER
Red
3-6. WHITE BALANCE ADJUSTMENTS 1. Input an entire white signal with burst. 2. Set to Service Adjustment Mode. 3. Set DCOL to “0”. 4. Set the PICTURE and BRIGHTNESS to minimum. 5. Adjust with SBRT if necessary. 6. Select GCUT and BCUT with 7. Adjust with
and
and
.
for the best white balance.
8. Set PICTURE and BRIGHTNESS to maximum. 9. Select GDRV and BDRV with 10. Adjust with
and
and
.
for the best white balance.
11. Reset DCOL to “1”. 12. To write into memory, press
then
.
— 18 —
KV-24FV12/25FV12/25FV12A/25FV12C SECTION 4 SAFETY RELATED ADJUSTMENTS 4-1.
R564 CONFIRMATION METHOD (HV HOLD-DOWN CONFIRMATION) AND READJUSTMENTS
Hold-Down Readjustment If the setting indicated in step 2 of Hold-Down Operation Confirmation cannot be met, readjustment should be performed by altering the resistance value of R564 component marked with .
The following adjustments should always be performed when replacing the following components which are marked with on the schematic diagram: Part Replaced ( ) DY, T505, CRT, IC501, C507, C520, C505, C509, C515, T504, T503, C551, L510, C546, C537,C547, D517, D518, D519, R560, R561, R562, R563, R565, R566, R567, R525 .................................. A Board
T505 FBT ammeter 3.0 mA DC range
Adjustment ( ) HV HOLD-DOWN R564
ABL
+
A
-
IABL
4-2. B+ VOLTAGE CONFIRMATION AND ADJUSTMENT
IC1301 ............................. MB Board
Note: The following adjustments should always be performed when replacing the following components, which are marked with on the schematic diagram on the A Board.
Preparation Before Confirmation 1. Using a Variac, apply AC input voltage: 120-220 ± 2 VAC. 2. Turn the POWER switch ON. 3. Input a white signal and set the PICTURE and BRIGHTNESS controls to maximum.
A BOARD:
4. Confirm that the voltage between C546 (+) or TP503 and ground is more than 97 VDC.
IC601, PH601
1. Using a Variac, apply AC input voltage: 130 ± 2 VAC. 2. Input a dot signal. 3. Set the PICTURE and BRIGHTNESS controls to minimum.
Hold-Down Operation Confirmation
4. Confirm that the voltage of A Board TP-600 is <136 VDC.
1. Connect the current meter between Pin 11 of the FBT (T505) and the PWB land where Pin 11 would normally attach. (See Figure 1 on the next page.)
5. If step 4 is not satisfied, replace the components listed above, then repeat steps 1–3.
2. Input a dot signal and set PICTURE and BRIGHTNESS to minimum: IABL = 100 ± 100 µA. 3. Confirm the voltage of A Board TP-600 is 135 ± 1 VDC. 4. Connect the digital voltmeter and the DC power supply via diode 1SS119 to C546 (+) and ground. (See Figure 1 on the next page.) 5. Increase the DC power voltage gradually until the picture blanks out. 6. Turn DC power source off immediately. 7. Read the digital voltmeter indication (standard < 138 ± 0.3 VDC). 8. Input a white signal and set PICTURE and BRIGHTNESS to maximum: IABL = 1650 ± 100 µA. 9. Repeat steps 4 to 7.
— 19 —
KV-24FV12/25FV12/25FV12A/25FV12C
POWER SUPPLY DIGITAL MULTIMETER
+ –
+ –
1SS119
R564 C546 1
9
R454
R438
R449
JR503
C448
+
R450
C530 R529
R567 R565
R445
IC501
R522
Q411
R525
8
Q503
10
D235
R563 C546
R573
R531
R447
D620
18
R225
R403
5 4
H.PROT
D234 C213 R218
R407
C541 C542
Q205 Q206
E
B
E
R659 C659
6
4
D232
2
6
R539 D506
2
R506
C510
R518
7 T504
L509
C523
R231
D233 D520
R511
C525
C550
D518
R540
C543 C511
L505
H.PULSE
R232
-13V
1
R615
C518
IC502
C629
L502
D236
D510
FB502 C524
R601
R226 R227
C211
R541 R514
L602
Q201
1 R527
D507
R532 C519 R537
R561
D514
D517
D616 FB503 TH501 C532
H.DRIVE
6
R507
C624
R558
R559
R543 200V
1
FB610
L501 C517
CN502
JR502 R557
D511 C513 T503
Q505 C552
CN511
C611
HEATER
4
1
T505 FBT
R554
D516 R555
C654
6 E
CN506
B
T502
R535
5
JUMPER-ID
135V
5
1
Q501
B
4
R505
R801
3 7
CN515
V DY -
C555
C504
Q502 R516
V DY +
T505
H DY -
H-OUT
R503
R804
C503
ABL11
H DY + R504
R515
1
C505
C509 C536
R803
H DY -
2
H DY +
CN501
+B
C
1
R545
C515 CN504
D521 R533
L510 C554
R546
R568 R502
L507 R547
C551
R534
R553
AMMETER 3mA dc range
A
TP600
+ – Figure 1
— 20 —
KV-24FV12/25FV12/25FV12A/25FV12C SECTION 5 CIRCUIT ADJUSTMENTS ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER Use the Remote Commander (RM-Y168) to perform the circuit adjustments in this section. NOTE: Test Equipment Required: • • • •
Pattern generator Frequency counter Digital multimeter Audio oscillator
5-1. SETTING THE SERVICE ADJUSTMENT MODE
5-2. MEMORY WRITE CONFIRMATION METHOD
1. Standby mode (power off).
1. After adjustment, remove the power plug from the AC outlet, then plug it in again.
2. Display
Sound volume +
Channel 5
Power
2. Turn the power switch ON and set to service mode.
on the Remote Commander (press each button within a second).
3. Call the adjusted items again to confirm they were adjusted.
5-3. ADJUSTMENT BUTTONS AND INDICATORS
Service Adjustment Mode On 1. The CRT displays the item being adjusted. Disp. (Item) SERVICE
Item Data
HSIZ
MUTING
POWER
0
DISPLAY
2. Press
or
on the Remote Commander to select an item.
3. Press
or
on the Remote Commander to change the data.
3
4. Press
then
5
to save into the memory.
6
Service Adjustment Mode Memory
1 4
SERVICE
WRITE
MUTING
ENTER
Green
8
ENTER
1. Press then initialize. SERVICE
Red
on the Remote Commander to VOLUME
RESET
Carry out step 1 when adjusting IDs 0–4 and when replacing and adjusting IC1003. 2. Turn set off then on to exit service adjustment mode.
RM-Y168
— 21 —
KV-24FV12/25FV12/25FV12A/25FV12C Adjustment Items Reg #
ITEM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
HSIZ HPOS VBOW VANG TRAP PAMP UPIN LPIN VM BLKO VMLV AGN2 REFP VBLK JPSW VSIZ VPOS VLIN SCOR VZOM EHT ASP SCRL HBLK LBLK RBLK VUSN HDW EWDC LVLN UVLN HTRAP RDRV GDRV BDRV RCUT GCUT BCUT DCOL SHUE SCOL SBRT RON GON BON AXPL AXNT CBPF CTRP COFF KOFF SSHP SHPF PREL Y-DC GAMM ABLM VTH YDEL NCOL FSC K-ID HOSC
FUNCTION Horizontal Size Adjustment Horizontal Position Adjustment Vertical Line Bowing Adj. Vertical line Bowing Slant Adj. Horizontal Trapezoid Adj. Horizontal PIN Distortion Adj. Upper PIN Distortion Adj. Lower PIN Distortion Adj. Velocity Modulation On/Off Vertical Blanking On/Off Velocity Modulation Level Aging 2 Reference Pulse Position Vertical Blanking On/Off Vertical Size Adjustment Vertical Position Adj. Vertical Linearity Adj. Vertical "S" Correction Adjustment 16:9 CRT Z Mode On/Off Vertical High-Voltage Correction Aspect Ratio Control 16:9 CRT Z Mode Trans. Scroll Horizontal Blanking On/Off Left Blanking Adjustment Right Blanking Adjustment V Saw Waveform Compress Horizontal Drive Pulse Width "Parabola" EW/ D.C. Adjustment Lower Screen BTM Vertical Line Adj. Upper Screen BTM Vertical Line Adj. Horizontal Trapezoid Adj. R Output Drive Control G Output Drive Control B Output Drive Control R Output Cutoff Control G Output Cutoff Control B Output Cutoff Control Dynamic Color On/Off Sub HUE Sub Color Sub BRIGHTNESS R Output On/Off G Output On/Off B Output On/Off Axis PAL Axis NTSC Chroma BPF On/Off Y TRAP FILTER On/Off Color On/Off Set Color Killer Sub SHARPNESS SHARPNESS Circuit Fo Pre-Shoot / Over-Shoot DC Transmission Ratio Switching Gamma Correction Amnt ABL Mode Switching ABL CD VHT Switching Y Delay Time Control No Color ID FSC Out On/Off Killer ID Control On/Off Horizontal VCO Oscillation Freq.
FIX RANGE DATA NTSC PAL M 0-63 0-63 0-15 0-15 0-15 0-63 0-63 0-63 0,1 0,1 0-3 0,1 0,1 0,1 0,1 0-63 0-63 0-15 0-15 0,1 0-15 0-63 0-63 0,1 0-15 0-15 0,1 0,1 0.1 0-15 0-15 0,1 0-63 0-63 0-63 0-15 0-15 0-15 0,1 0-31 0-31 0-31 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0,1 0-15 0,1 0,1 0,1 0-3 0,1 0,1 0-15 0,1 0,1 0,1 0-15
PAL N
VIDEO
35 35 35 33 33 33 5 5 5 7 7 7 7 7 7 7 7 7 36 36 36 36 36 36 Palette mode controls this register 0 Palette mode controls this register 0 0 0 0 40 32 7 6
47 32 7 6
47 32 7 6
15
15
15
0 6 47 31 1 11 8 0 1 0 0 0 **** 31 21 21 10 6 6 0 15 16 1 1 1 0 1 1 1 0 0 5 Palette mode controls this register 1 Palette mode controls this register Palette mode controls this register 1 1 7 1 1 0 7
— 22 —
RF
AVERAGE DATA
38 21 9 5 7 32 39 39 0 0 2 0 0 0 0 49 32 6 8 0 6 47 31 1 12 5 0 1 0 0 0 0 36 26 25 8 6 7 1 15 15 15 1 1 1 0 0 1 1 0 0 7 1 1 1 1 1 1 7 1 1 0 7
KV-24FV12/25FV12/25FV12A/25FV12C Reg # 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
ITEM
FUNCTION
RANGE
FIX DATA
VSS Vertical Sync Slice Level 0,1 HSS Horizontal Sync Slice Level 0,1 HMSK 0,1 VTMS Select Signal VTIM Pin 0-3 CDMD Vertical Count Down Mode Switching 0-3 AFC AFC Loop Gain Switching 0-3 FIFR Field Frequency 0-3 SBAL Sub Balance 0-15 SBAS Sub Bass 0-15 STRE Sub Treble 0-15 BBEL BBE Low 0-15 BBEH BBE High 0-15 SRND Surround 0,63 BBE BBE On/Off 0,1 DISP O.S.D Display Position 0-63 TROT Tilt Correction 0-63 HCLW Horizontal Count Lower Limit 0-127 HCHG Horizontal Count High Limit 0-127 ABL0 0,1 ABL1 0-7 SYSC Color System 0-7 VENH Vertical Enhancement 0-7 CBPC 0,1 BYCF 0,1 KILC 0,1 LDOT 0,1 CORE 0,1 CHTR 0,1 CHPF 0,1 ENHO 0,1 ID0 0,255 ID1 0,255 ID2 0,255 ID3 0,255 ID4 0,255 ID5 0,255 ID6 0,255 * FIFR = 3 for NTSC models, FIFR=1 for Trinorma models ** VSS = 1 for US & CND, VSS=0 for Other *** CDMD = 3 for US & CND, CDMD =0 for Other **** KV-25FV12A/25FV12C =1; Others = 0
NTSC
PAL M
PAL N
VIDEO
RF
AVERAGE DATA
** 0 0 0
* 5 0 3 4 5 0 0 15 31 16 64 4
0 3
3 0 1
0 0 0 0 0 0 3 7 9 9 12 9 13 1 15 31 16 64 1 7 6 4 0 0 0 0 0
*** 0
1
Palette mode controls this register 0 0 3 0 Palette mode controls this register 1 1 0 1 0 25 3 91 2 233 17 0
See ID Map See ID Map See ID Map See ID Map See ID Map See ID Map See ID Map
SERVICE
ID0
25
Notes: No. 1–100 show the order that each adjustment mode may be selected while in service mode. Data Range shows the range of possible settings for each adjustment mode. Initial Data shows the standard settings for each adjustment mode.
Feature ID Map V. Frequency (Free Run) Check KV-24FV12 KV-24FV12 KV25FV12 KV25FV12C KV25FV12A
Destination (US) (CND) (E) (E) (E)
ID-0 ID-1 ID-2 ID-3 ID-4 ID-5 ID-6 89 89 17 17 23
19 19 19 19 19
239 239 255 255 255
50 50 2 2 2
137 137 233 233 233
19 19 19 19 19
0 0 0 0 128
5-4. MB BOARD ADJUSTMENTS
1. Select video 1 with no signal input. 2. Set the conditions for a standard setting. 3. Connect the frequency counter to TP-502 (V OUT) or (V DY+) and ground on the A Board . CN501 pin 4. Check that V. Frequency shows 60 ± 4 Hz for NTSC, 50 ± 4 Hz for PAL-N (KV-25FV12A ONLY).
H. Frequency (Free Run) Check
Drive (RDRV)
1. Input a TV mode (RF) with no signal.
1. Input a color-bar signal and set the level to 75%.
2. Connect a frequency counter to base of Q501 (TP-500 H. DRIVE) on the A Board. 3. Check H. Frequency for 15735 ± 200 Hz, and 15650 ± 200 Hz for PAL-N (KV-25FV12A ONLY.)
2. In Standard mode, set PICTURE to maximum and COLOR to minimum. 3. Activate the Service Adjustment Mode.
— 23 —
KV-24FV12/25FV12/25FV12A/25FV12C 4. Set both GON and BON items. Using and ; set each to the following values. Leave RON set to “1”.
5. Adjust the values of SBRT with visible crosshatch. 6. Press
SERVICE
RON
then
and
to obtain a faintly
to save into the memory.
1 1: ON 0: OFF
Sub Hue, Sub Color Adjustment (SHUE, SCOL) 1. Input a color-bar signal and set level to 75%. 2. Activate the Service Adjustment Mode.
R ON: G ON: B ON:
ON (1) OFF (0) OFF (0)
3. Select the DCOL item and set the value to “0”. 4. Connect an oscilloscope probe to CB Board, CN705 Pin
(Blue Out). and
.
5. Select the DCOL item and set it to “0”.
5. Select the SHUE and SCOL item with
6. Connect an oscilloscope probe to CB Board, J701 pin (KR) (RED OUT).
6. While showing the SHUE item, adjust the waveform with and until the second and third bars show the same level (V2 = V3 < 0.1 Vp-p).
and
7. Select RDRV with
. and
8. Adjust the value of RDRV with
7. While showing the SCOL item, adjust the waveform with and until the first and fourth bars show the same level (V1 = V4 < 0.1 Vp-p).
for
92.0 ± 2 VDC.
8. Input RF PAL-M and PAL-N color-bar and repeat steps 1-7 for each. (KV-25FV12A ONLY). 90.2 ± 2 VDC
V1
V2
V3
V4
9. Reset the item DCOL to “1”. 10. Reset GON and BON values to “1”. R ON: G ON: B ON:
ON ON ON
(1) (1) (1)
8. Select the DCOL item and reset to 1. 9. Press
then
to save into the memory.
11. Reset Picture and Color to normal values: PICTURE: COLOR: 12. Press
V. Size Adjustment (VSIZ)
MAX CENTER
1. Input a crosshatch signal.
then
to save into the memory.
2. Activate the Service Adjustment Mode. 3. Select the VSIZ item with 4. Adjust value of VPOS with center.
Display Position Adjustment (DISP) 1. Input a color-bar signal.
5. Press
2. Set to Service Adjustment Mode. 3. Select DISP with
and
then
and
.
and
for the best vertical
to save into the memory.
.
4. Adjust values of DISP with to the center.
and
to adjust characters then
5. Write to memory by pressing
.
6. Check to see if the text is displayed on the screen.
V. Center Adjustment (VPOS) SERVICE
DISP
15
Perform this adjustment after performing H. Frequency (Free Run) Check. 1. Input a crosshatch signal. 2. Activate the Service Adjustment Mode. 3. Select the VPOS item with
and
.
Sub Bright Adjustment (SBRT)
4. Adjust value of VPOS with center.
and
for the best vertical
1. Input a monoscope signal.
5. Press
2. Activate the Service Adjustment Mode. 3. Set the PICTURE and BRIGHTNESS to minimum. 4. Select the SBRT item with
and
.
— 24 —
then
to save into the memory.
KV-24FV12/25FV12/25FV12A/25FV12C H. Center Adjustment (HPOS)
V. Angle (VANG), V. Bow (VBOW), Upper pin (UPIN) and Low Pin (LPIN) Adjustments
Perform this adjustment after performing H. Frequency (Free Run) Check.
1. Input a crosshatch signal.
1. Input a crosshatch signal.
2. Activate the Service Adjustment Mode.
2. Activate the Service Adjustment Mode. and
3. Select the HPOS item with
3. Select VANG, VBOW, UPIN, and LPIN with .
and
4. Adjust the value of HPOS with horizontal center.5. Press to save into the memory.
4. Adjust with for the best then
5. Press
and
and
.
for the best picture.
then
to save into the memory.
V ANGLE (VANG)
H. Size Adjustment (HSIZ)
V BOW (VBOW)
1. Input a monoscope signal. 2. Activate the Service Adjustment Mode. and
3. Select HSIZ with 4. Adjust with 5. Press
and
. UPPER PIN (UPIN)
for the best horizontal size.
then
to save into the memory.
LOW PIN (LPIN)
V. Linearity (VLIN), V. Correction (VSCO), Pin Amp (PAMP), and Horizontal Trapezoid (TRAP) Adjustments 1. Input a crosshatch signal.
1. Change the value of the DCOL item to “1”.
2. Activate the Service Adjustment Mode. 3. Select VLIN, VSCO, PAMP, and PPHA with 4. Adjust with 5. Press
and
and
.
for the best horizontal size.
then
Service Adjustment Mode Memory
to save into the memory.
2. After completing all adjustments, press
then
Read From Memory SERVICE
READ
Green
0
V LINEARITY (VLIN)
Red
ENTER
V CORRECTION (VSCO)
PIN AMP (PAMP)
HORIZONTAL TRAPEZOID (TRAP)
— 25 —
.
KV-24FV12/25FV12/25FV12A/25FV12C SECTION 6 DIAGRAMS 6.1 BLOCK DIAGRAM C 60 CN4 N460 M -L MON ON-L
1 1
PO LY PPLY SUPP R SU WER POWE DE ON TION ECTI FLEC DEFL /IF IF ER/ T TUN UNER L L
05 J205 J2
V IX /FIX VAR AR/F Y O DIO AUDI CR R AU YCB CBC
3 3
-L 44 IX-L /FIX VAR AR/F V
O DIO AUDI AU
O -L L OUT UT-
O L OU UTT-L
5 5
L OR SSOR CESS ROCE PRO T P LOU OUT
6 6
O -R R OUT UT-
O R OU UTT-R
6 6
R T ROU OUT
9 9V V
9 9V V
7 7
8 8
G GND ND
G GND ND
8 8
9 9
Y -L L YUV UV-
Y L YU UVV-L
9 9
1 10 0
Y -R R YUV UV-
1 11 1
V L V33-L
V L V33-L
1 12 2
V R V33-R
V R V33-R
13 3 1
V L V11-L
L V V11-L
1 13 3
IN 2 IN2
14 4 1
R V V11-R
R V V11-R
14 4 1
2A IN2A IN
1 15 5
B A ATA B-D -DAT
1 16 6
B LK K B-C -CL
B K B-CL CLK
1 17 7
T L TVV-L
T L TVV-L
17 7 1
IN 1 IN1
1 18 8
T R TVV-R
T R TVV-R
18 8 1
1A IN1A IN
1 19 9
V R V22-R
V R V22-R
19 9 1
3A IN3A IN
2 20 0
V L V22-L
V L V22-L
2 20 0
IN 3 IN3
7 7
Y Y
4 4
1 1
4 4
L X-L FIXR/FI VAR/ VA
5 5
9V 9V
SS
2 2
V IX-R /FIX -R 33 VAR AR/F
M MTS TS
R R
C C
1 1
MO R N-R MON-
M -R MON ON-R R X-R FIXR/FI VAR/ VA
A IO AUD UDIO
AU DIO IO AUD
IN INPU T PUT
50 C CN4 N450 MO L N-L MON-
2 2 3 3
2 2
J 1 J20 201 S O IDE DEO S-V -VI VV
LL
Y R YU UVV-R
I 03 C403 IC4
9 9V V IN 5 IN5 LI B NE B LINE LI A NE A LINE
10 0 1
5A IN5A IN
11 1 1 12 2 1
O -B OUT UT-B
LI N LIN
O -A OUT UT-A
RI N RIN
O DIO AUDI AU R SOR ESSO OCES PROC PR I 04 C404 IC4
SD A SDA
ATA TA 1155 B-D -DA B
SC L SCL
1 16 6
RR
V EO VID IDEO
Y ITY OCIT ELOC VEL ( MMVOD ) ON TION LATI ULA ODU
02 J2 202 J
F V A/V NT T A/ FRO RON ( ) UT) (I INP NPUT
L L AU DIO IO AUD
C 06 6 CN5 N50 R R
9 V 9V
+ B +B
3 903 CN90 CN
C 1 CN N90 901
V M VM
3 3
9 V 9V E E
9 V 9V E E
2 2
N C NC
N C NC
2 2
1 1
+ B +B
+ B +B
1 1
4 4
OUT VM OUT VM
AMP AMP
V M VM
5 5
5 5 4 4
9 V 9V
DRIVE VM DRIVE VM
Q903 Q903
Q905 Q905
Q901 Q901
Q904 Q904
Q906 Q906
Q902 Q902
VM VM
E E
3 3
VM VM
VM VM
1 1 2 2
S V 7.5 .5V Y 7 STB TBY T 01 TU1 U101 9 V 9V
9 V 9V
3 30V 0V
3 30V 0V
5 V 5V
5 V 5V
3 3
5 5
T I I-P -PRO ROT
6 6
DG DGC C
7 7
RE LAY AY REL
8 8 9 9
CL CLOC K OCK
1 10 0 1 11 1
F ONO F M O MON DE MODE MO AP L LED ED S SAP LE LED D
ST ST
O DEO VIDE VI D ET-O UT -OUT DET
AG AGC C
RF RF
AGC AGC
L L OU T OUT
H P HP M E MUT UTE SE L1 SEL1
A
CN 02 2002 CN20
L0 SEL0 SE
1 12 2
GN D GND
3 1 13
O ONO O-M -MON O
1 14 4
OO-SA P SAP
1 15 5
I-SA P SAP I-
1 16 6
I N REN TERE I-S -STE
1 17 7
1 IN1 MAIN MA
1 18 8
A FT O OUT UT AFT
V M VM GND D GN
TA DATA DA
DE T -EM OUT DE-E M OU
S W SPS PSW S Y 7. 5V STB TBY 7.5V
4 4
MA MAIN 2 IN2
1 19 9
AF T AFT
0 2 20
A E MUT UTE AGC GC M
IWN HLD LDWN I-H
Q101 Q101
R R OU T OUT TE MUTE MU
2 2 6 D 2 2 D 6 D 2 22 62 D6 F -F L0L 60 B6 SB 4S D4 D F L 0 6 B S 4 D F L 0 6 B S 4 D T CT EC RE C R AC T C E A R C A T C E R C A
TT 66 00 44 SS RR TT :: SS TT AA NN DD BB YY
S IT CUIT CIR IRCU NDBY STA TAND BY C
VOL-CTRL VOL-CTRL
VOL-CTRL VOL-CTRL
Q410 Q410
Q411 Q411
1 1
+B +B
D623 D623 3 3
MUTE MUTE
ER RTER NVE VERT CO CON 4 4
Q6 05 5 Q60
P TP T P T P T
2 02 50 5 2 0 5 2 0 5
STANDBY STANDBY
D 626 6 D62
P CT TECT PRO ROTE
5 5
9 9
6 6
8 8
A P AMP IO AM UDIO AUD IC 2 402 IC40
C 636 36 C6
Q6 06 6 Q60
2 0 6 Y R R 2 0 2 6 02 Y 60 R Y6 RY
Y A L R E R Y A Y L AY E LA R EL RE R ER WE OW PO C P AC A R E W O P C A R E W O P C A
IN3+ IN3+
1 1
IN4+ IN4+
2 2
IN1+ IN1+
3 3
GN D GND
IN2+ IN2+
4 4
AB L ABL
5 5 6 6 7 7
VD VD-
8 8
MO OR NIT ITOR MON
9 9
V3 V3
1 10 0
OO-VO L VOL
1 11 1
PI PIPL P-L
08 Q608 Q6
1 12 2
S T SDA DAT
11
33
Q501 Q501
03 3 T60 T6
OUT H OUT H
66
Q502 Q502
2 2
D DGC GC
1 1
22
1133
+B +B RECT RECT
V D OLD HOL V H C RL NTRL CNT +B +B
B LOW B LOW
S S
REF REF
1122 AUDIO AUDIO
77
1111
99
1100
RECT RECT
AUDIO AUDIO VCC VCC
P TP T P T P T
PP HH 66 00 00 PP HH OO TT OO CC OO UU PP LL EE RR 4 4 4 4
1 1 1 1
3 3 3 3
2 2 2 2
11
22 33
44
1 01 60 R6 DR VD V 1 0 6 R D V 1 0 6 R D V
SW SW
OUT2 OUT2
1 1 2 2 3 3
8 08 50 5 8 0 5 8 0 5
11 1 1
L BL AB A L B A L B A
OUT OUT
DF DF H H H H
Q604 Q604
11
R K ACK BAC R B R O GO R G L K ACK BAC L B
55
L O GO L G HP ND GND HP G
1 1
L -TIM ER LED ED-T IMER
2 2
P W -SW ER-S POW OWER
44
I T ECT ETEC DET R D IR 01 2001 IC20 IC
4 4
K -SW KEY EY-S W
6 6
S V +5V Y +5 STB TBY
01 J401 J4 HE HONE ADP NE HEAD PHO
ON TION NCTI FUNC FU SW CH ITCH SWIT 11
11
22
33 44
33
22
44
C 02 CN9 N902
55 AC AC
2 2
2 2
C AC A
66
12V 12V
5V G EG RE 5V R I 04 C604 IC6
CN 01 2001 CN20
GN D GND
Q503 Q503
55
C AC A
C
CN 7 407 CN40
ME SW NUU-SW MEN
5 5
OUT PIN OUT PIN
T 4 T50 504
1 1
+ +
L SPL SP
R) R(SE NSO SOR) SEN IR( 3 3 I
8 8
DRIVE PIN DRIVE PIN
S901 S901
1 1
4P 4P
7 7 V 2) 2(VI DEO EO2) VID V2(
POWER AC POWER AC
AC AC
SP R SPR CN 6 406 CN40 4P 4P
S LPK L SPK L+ K L+ SPK SP
33
5 5
Q504 Q504
CN 901 CN90 1
+ +
S + R+ PK R SPK S RPK R SPK
4 4
22 DRIVE RELAY DRIVE RELAY
6 6
+ +B B
5 0 6 D 5 0 6 D 5 05 D 60 D6 F L 0 6 B S 4 D F L 0 6 B S 4 D D F -F L0L 60 B6 SB 4S D4 T CT EC RE C R AC A T C T E C R E R C A C A
A IN C IN AC
S SPL PL
2 G G 2
9 9
0 0
S SPR PR
SP L+ K L+ SPK S LPK L SPK CN CN40 4 404
8 8
Q506,507 Q506,507
IN-1 IN-1 IN+2 IN+2
+ +
SP R+ K R+ SPK S RPK R SPK
+ +
+5V STBY +5V STBY
IC 2 602 IC60
C1 C1
22
5 4 5 6 4 R 6 R 5 45 64 R6 R k 0 k 1 0 1 k 1 0k 10
ER P AMP R AM ROR ERRO
Y Y1 1
11 FV V F
2 0 6 T 2 0 6 T 2 02 T 60 T6 1 0 1 6 0 F 6 F 1 01 F 60 F6
GN D GND
1 19 9 2 20 0
11
1 01 00 D 20 D2 1 0 0 2 D 1 0 0 2 D
A C IN IN AC
V1 V1
1 18 8
22
TT 55 00 55 FF BB TT
0 0
V T OUT V OU IC 2 502 IC50
B LOW B LOW
RECT RECT 88
IN+1 IN+1
I 01 C501 IC5 O OU UT T1 1
1177
1144
12V 12V
Q609 Q609
1155
33
VIN IN V
O B /FB OCP CP/F
DRIVER DGC DRIVER DGC
44
1 17 7
B
CN 09 2009 CN20
03 3 C CN4 N40
DR RI IV VE E+ + D
D DGC GC
S 9V SET ET9V
1166
DR RI IV VE ED
1 01 60 Y6 RY R 1 0 1 6 0 Y 6 R Y R Y AY LA EL RE C R GC DG D Y A L E R C G D Y A L E R C G D
D D
3 30V 0V
1 16 6
4 4
7 7
CO R TER ERTE NVER CONV I 01 C601 IC6
1 15 5
1188 2 2
55
1 14 4
3 V 30 0V
HV V H
1 1
V 0V 2 00 20 V 0 V 0 0 2 0 2
11
SC L SCL V T5V SE SET5
44
22
DRIVE H DRIVE H
1 13 3
V T5V SE SET5
SE V T9V SET9
T 1 T50 501
C GC DG D
VD + VD+
SW ITCH SWIT CH
07 Q607 Q6
:M INI NI :MI
EW EW
OUT1+ OUT1+ OUT2OUT2OUT2+ OUT2+ OUT1OUT1-
S E Y DR IVE STB TBY DRIV
CN 601 01 CN6 2 2P P
HD HD
5V 5V
12V 12V
9 G REG V RE 9V I 03 C603 IC6
55 9V 9V
POWER) (AC POWER) (AC
K LY ONLY A ON 12A FV12 25FV V-25 KV-
C 02 CN5 N502
P T P T P TP T
0 5 6 6 0 5 6 06 50 5
R CK BACK R BA R O GO R G K ACK BAC L B L
CN 8 408 CN40
GO L GO L HP ND GND HP G V DY + DY+ V DYV DY V
44
DYH DY H
33
H H DY DY-
22
H H DY + DY+
11
H H DY + DY+
D
6 6 H HE EA AT TE ER R
C 01 1 CN5 N50
E
— 27 —
881 Block - A PWB.p65
1
— 28 —
3/15/00, 1:40 PM
KV-24FV12/25FV12/25FV12A/25FV12C
2 002 CN1 N100 C
H SW H SW NCH SYNC HSY
DI B OMB COM G C DIG F R TER ILTE FIL < L> ROL> NTRO CONT G CO NG NIN TUNI
C C
R1316 R1316 0 0 CHIP CHIP
R1336 R1336 1.5k 1.5k :CHIP :CHIP
C C
L1304 L1304
6
5
Q1307 2SB709A BUFFER
R1332 R1332 560 560 :CHIP :CHIP
1.0 Vp-p (H)
Y Y
R1334 R1334 100 100 :CHIP :CHIP
R1335 R1335 100 100 :CHIP :CHIP
Q1354 2SB709A BUFFER
G G
5V
FB1301 FB1301 0UH 0UH
C1331 C1331 0.01 0.01 CHIP CHIP
4 4
R R
C1334 C1334 0.01 0.01 CHIP CHIP
3 3
FL1302 FL1302
6 6
C1327 C1327 100 100
TO CB BOARD
H- TRAP
19
COUT COUT
C1328 C1328 10p 10p CHIP CHIP
1 1
17 1 7 C1332 C1332 0.01 0.01 CHIP CHIP
C1326 C1326 0.01 0.01 CHIP CHIP
2 2
2 2
2.7 Vp-p (8 MHz)
4.7 Vp-p (H) R1329 R1329 56k 56k CHIP CHIP
C C
1 1
DAVRT DAVRT
1 6 16
VRT VRT
5 15 1
R1311 R1311 820 820 CHIP CHIP C1324 C1324 0.01 0.01 CHIP CHIP
C1329 C1329 0.0012 0.0012 CHIP CHIP
AIN AIN
4 14 1
3 3
17
18 VSS1 VSS1
3 13 1
VRB VRB
12 1 2
4 4
FIL FIL
C1359 C1359 10 10
CN1303 9P
11 1 1
5 5
VDD1 VDD1
9V
5V
VSS2 VSS2
IC1304 NJM2534M-TE2 VIDEO SWITCH
9V R1308 R1308 220 220 CHIP CHIP
6 6
VDD3 VDD3
VID VIDEO EO2 2
CKIN CKIN
V1 V1
VDD4 VDD4
OUT T VOU V
7 7
8 8
KILLER KILLER
VO VO
V IDEO1 VIDE O1 9V 9V
SDA SDA
R1306 R1306 220 220 CHIP CHIP
TVM TVMAI AIN N
9 9
TEST TEST
IC1302 TC90A49P DIG COMB FILTER
R1400 R1400 0 0 CHIP CHIP
V EO VID IDEO
10 1 0
C1330 C1330 15p 15p :CHIP :CHIP
C1322 C1322 CHIP 0.01 CHIP 0.01
C1321 C1321 0.01 0.01 CHIP CHIP
C1320 C1320 0.01 0.01 CHIP CHIP
9V
FB1302 FB1302 0UH 0UH
L1305 L1305
5V
C1304 C1304 0.47 0.47
C1309 C1309 0.01 0.01 CHIP CHIP
C1308 C1308 100 100
C1306 C1306 100 100
SCL SCL
C1358 C1358 4.7 4.7
CHIP CHIP
C1307 C1307 C1305 C1305 CH 0.01 CH CH 0.01 0.01 0.01 CH
R1390 R1390 100 100 CHIP CHIP
R1073 R1073 4.7k 4.7k :CHIP :CHIP
R1072 R1072 4.7k 4.7k :CHIP :CHIP
L1303 L1303
CHIP CHIP
C1325 C1325
V EO O VID IDE
L1302 L1302
— 40 —
— 41 —
3/15/00, 2:26 PM
— 42 —
3.1 Vp-p (H)
KV-24FV12/25FV12/25FV12A/25FV12C MB BOARD IC BLOCK DIAGRAMS MB BOARD IC VOLTAGE LIST IC1001 pin volt
IC1002 pin volt
33
8.7
34
4.9
1
1.7
1
4.6
35
4.8
2
4.8
2
4.8
36
0.2
15
4.6
3
GND
47
1.7
4.3
4
GND
48
0.2
4.9
5
4.8
B
0.2
1
3.3
5
1.9
22
2.3
2
5.1
6
5.0
23
GND
3
1.3
7
0.0
24
2.2
4
5.1
8
5.0
25
2.3
5
4.8
9
4.9
26
0.0
6
4.3
10
4.9
27
4.9
7
6.3
11
0.0
28
2.2
8
5.0
12
0.0
29
2.3
9
5.1
13
2.5
30
5.0
10
GND
14
2.1
31
0.0
11
4.1
15
5.0
32
5.0
12
2.4
16
0.0
33
2.4
13
3.5
17
2.5
34
4.4
14
3.5
18
3.2
35
5.0
15
5.4
19
1.9
36
4.8
16
7.7
20
2.4
37
4.8
17
1.6
IC1304 pin volt
20
21
C
AFT
2.4
ISAP
4
AGC
3.2
2.1
ST
3
20
IC1301 pin volt
OSAP
5.0
5
1.4
19
IC1002
2
R1036 C1001 C1011
5.0
8
8
1
5.0
4.9
R1022
1
18
Q1009
GND
R1032
4.8
7
D1003
6
-0.2
R1074 R1060
0.0
17
D1011
16
IC1001
IC1302 pin volt
HP
14
5.2
46
CN1004
0.0
45
GND
7.5V
13
GND
1
2
R1046
1
5.0
VM
0.1
12
8.7
R1095
11
5.1
44
D1001
0.1
R1049
10
43
IC1003 pin volt
C1373
0.0
R1407
6.2
9
R1020
5.1
42
R1023
41
GND
R1040
3.8
8
D1014
7
0.0
C1082
NC
8
R1405
7
A
R1053
GND
Q1325
5.3
40
JR1001
39
8.9
C1080
NC
6
R1080
5
0.1
C1083
0.0
6
D1012
5
PIN 52
5.3
R1063
4.6
38
PIN 26
37
NC
5
4
JR1900
4.6
4
3
JR1901
3
0.4
2
JR1902
0.0
4
1
JR1903
3
MB BOARD: IC1301 CXA2135S (KV-25FV12A ONLY)
[TUNING CONTROL, YCJ]
GND
Vcc2
GND2
Y CLAMP
APED
VM OUT/ V PROT
EB-Y IN
ER-Y IN
EY IN
YUV SW
R1 IN
G1 IN
B1 IN
YS1
R2 IN (YOUT)
G2 IN (R-YOUT)
B2 IN (B-YOUT)
YS2/YM
CN1003
FSCOUT
VD-
R1106
Q1011
40
8
1
15
39
38
37
36
28
27
26
25
32
31
30
29
5V
EYUV CLAMP YUV SW YUVOUT
Y1
COLOR AMP AXIS
COLOR KILLER <>
JR1088
BPF
Y/C MIX RGB CLAMP
VPROT <> VM AMP (OFF YS/YM)
ACC AMP
D1301
R1374
CLAMP DC TRAN
FILTER ALIGNMENT CAL. by fsc
CHROMA Q1301
R1384
C1372
TV/C2 IN
43
CHROMA SW
ATT
9
1
Q1317
R1379
SHARPNESS DL SHARPNESS AMP
TRAP + EQ
IC1003
D-2
Q1002
F-4
Q1306
E-4
Q1315
G-3
Q1329
F-2
E-3
Q1316
F-3
Q1330
F-3
CRYSTAL X1001
D-4
D1003
C-3
D1301
G-5
IC1302
E-1
Q1009
C-4
Q1308
E-3
Q1317
G-3
Q1331
G-4
X1303
E-2
D1005
D-3
D1310
F-3
IC1304
E-4
Q1010
C-5
Q1310
D-2
Q1325
B-4
Q1332
F-1
X1304
E-2
D1010
D-3
IC1305
D-3
Q1011
E-3
Q1311
E-3
Q1326
B-4
Q1336
F-4
X1305
E-2
D1011
C-3
IC1001
C-3
TRANSISTOR
Q1301
G-5
Q1312
D-2
Q1327
F-2
Q1350
G-4
D1012
B-3
IC1002
C-4
Q1001
Q1302
F-1
Q1313
D-2
Q1328
G-1
Q1354
D-3
6
MON OUT
H SYNC SEP AFC <> <>
PHASE DET. HPROT <>
H TIM GEN.
HD GEN. IREF
REG
20
17
5
18
19
10
12
— 44 —
3/15/00, 2:29 PM
HSAW GEN. (ZAP)
16
33
REG
Q1307
VIDEO SW
