Transcript
WQ-790W
SERVICE MANUAL No. S7852WQ790W//
WQ-790W • In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified should be used.
CONTENTS Page SPECIFICATIONS ............................................................................................................................................................... 1 VOLTAGE SELECTION ....................................................................................................................................................... 2 AC POWER SUPPLY CORD AND PLUG ........................................................................................................................... 2 FITTING OF DIAL POINTER ............................................................................................................................................... 2 NAMES OF PARTS ............................................................................................................................................................. 3 DISASSEMBLY .................................................................................................................................................................... 4 ADJUSTMENT ..................................................................................................................................................................... 5 NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 6 VOLTAGE ............................................................................................................................................................................ 7 TYPES OF TRANSISTOR AND LED ................................................................................................................................... 7 SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ................................................................................................. 8 PARTS GUIDE / EXPLODED VIEW
SPECIFICATIONS ● Radio section
● General Power source:
Power consumption: Output power:
Speakers: Input terminal: Output terminal: Dimensions: Weight:
AC 110-127 V/220-240 V, 50/60 Hz DC 15 V ["D" size (UM/SUM1, R20 or HP-2) battery × 10] 20 W PMPO; 120 W (60 W + 60 W) (AC operation) MPO (Max.); 30 W (15 W + 15 W) (AC operation) RMS; 15 W (7.5 W + 7.5 W) (DC operation, 10 % T.H.D.) 12 cm (4-3/4") free-edge speaker × 2 5 cm (2") surround speaker × 2 MIC 1/2; 1 mV/600 ohms CD/LINE; 350 mV/47 kohms Headphones; 16-50 ohms (recommended; 32 ohms) Width; 630 mm (24-13/16") Height; 205 mm (8-1/8") Depth; 215 mm (8-1/2") 5.3 kg (11.7 lbs.) without batteries
Frequency range:
FM; 88 - 108 MHz SW1; 2.3 - 7.3 MHz SW2; 7.3 - 22 MHz MW; 526.5 - 1,606.5 kHz
● Tape recorder section Frequency response: Signal/noise ratio: Wow and flutter: Motor: Bias system: Erase system:
60 - 12,000 Hz (Normal tape) 40 dB (TAPE 1, recording/playback) 55 dB (TAPE 2, playback) 0.15 % (WRMS) DC 15 V electric governor AC bias Magnet erase
Specifications for this model are subject to change without prior notice.
SHARP CORPORATION
This document has been published to be used for after sales service only. The contents are subject to change without notice.
WQ-790W FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
VOLTAGE SELECTION Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage as follows: Slide the AC power supply socket to the visible indication of the side of your local voltage.
AC POWER SUPPLY CORD AND PLUG 9FF24801830210
9FF26802125120
9FF24801600292
9FF26802125210
FITTING OF DIAL POINTER 1. Remove the main PWB. Attach the dial pointer as shown arrow A on the front cabinet, putting it into the section indicated by arrow B . 2. Install the main PWB in the front cabinet and secure it with the four screws. 3. Turn the tuning control knob in the direction indicated by C . Set the dial pointer to point "0", and then make the rest of the adjustments.
Dial Pointer (234)
Front Cabinet Dial Pointer (234)
"0" Point
A
C
Tuning Control Knod (233)
B
Dial Drum (231)
Main PWB Figure 2 –2–
Screw (608) ø3x10mm
WQ-790W
NAMES OF PARTS
13
1
14 15
2 3 4 5 6 7 8 9 10 11 12
16 17 18 19 20 21 22 23 24 33 34
29 30 31
25 26 27 28
32 37
11. 12. 13. 14. 15.
(TAPE (TAPE (TAPE (TAPE (TAPE
Cassette Compartment Record Button: Play Button: Rewind Button: Fast Forward Button:
13. 14. 15. 16. 17.
16. 17. 18.
(TAPE 1) Stop/Eject Button: (TAPE 1) Pause Button: (TAPE 2) Reverse Mode Switch:
19. 10.
(TAPE 2) Play Button: (TAPE 2) Fast Wind Buttons: / (TAPE 2) Stop/Eject Button: (TAPE 2) Direction Switch:
18. 19. 20. 21. 22. 23. 24. 25. 26.
11. 12.
35 36
1) 1) 1) 1) 1)
(TAPE 2) Cassette Compartment Full-Range Speaker Surround Speaker Mixing Microphone Sockets Mixing Microphone Volume Control Surround On/Off Switch Surround Mode Select Switch Function Selector Switch Surround Mode Indicators Band Selector Switch Tuning Control Fine Tuning Control Spectrum Analyzer FM Stereo Indicator
–3–
27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39.
38 39
Power/(TAPE 2) Play Direction Indicators Built-in Microphone Dubbing Speed/Built-in Microphone/FM Mode Switch Extra Bass Control: X-BASS Graphic Equalizer Controls Volume Control FM/SW Telescopic Rod Aerial CD/Line Input Sockets Headphone Socket Beat Cancel Switch Battery Compartment AC Power Input Socket AC Voltage Selector
WQ-790W
DISASSEMBLY Open
Caution on Disassembly Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure excellent performance: 1. Take cassette tape out of the unit. 2. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit and remove the batteries from the unit. 3. Take off nylon bands or wire holders where they need to be removed when disassembling the unit. After servicing the unit, be sure to rearrange the leads where they were before disassembling. 4. Take sufficient care on static electricity of integrated circuits and other circuits when servicing.
Casette Holder (Left/Right) Open (B1)x1 ø3x20mm Front Cabinet
(B3)x6 ø3x10mm
(B1)x1 ø3x20mm Tape Mechanism (C1)x1
(C3)x4
STEP 1
REMOVAL
PROCEDURE
FIGURE
1. Battery Compartment Lid. ................................. (A1)x1 2. Screw ................... (A2)x1 3. Screw ................... (A3)x8 4. Socket .................. (A4)x1
4-1
Tape mechanism 1. Screw ................... (B1)x2 2. Socket .................. (B2)x4 3. Open the cassette holder. 4. Screw ................... (B3)x6
4-2
Main PWB
1. Knob ..................... (C1)x1 2. Screw ................... (C2)x4 3. Socket .................. (C3)x5
4-2
4
Graphic Equalizer 1. Screw ................... (D1)x5 PWB
4-3
5
Volume PWB
1. Knob ..................... (E1)x1 2. Screw ................... (E2)x2 3. Screw ................... (E3)x1
4-3
1. Screw ................... (F1)x1 2. Bracket ................. (F2)x1
4-4
2
3
6
Front Cabinet/ Rear Cabinet
Power PWB
(B2)x1 (C3)x1
(B2)x3 (C2)x4 Main PWB ø3x10mm Figure 4-2
Graphic Equalizer PWB Front Cabinet Volume PWB
(E1)x1
(D1)x5 ø3x10mm
(E2)x2 ø3x10mm (A4)x1
(E3)x1 ø2x6mm
Lug Wire Figure 4-3
Main PWB
Front Cabinet
Rear Cabinet
(F2)x1
(A2)x1 ø2.6x10mm
Power PWB Pull
Rear Cabinet
(A1)x1
(F1)x1 ø3x10mm
(A3)x8 ø3x20mm
Power Transformer
Figure 4-1
Figure 4-4 –4–
WQ-790W
ADJUSTMENT MECHANISM SECTION
TUNER SECTION
• Driving Force Check
fL: Low-range frequency fH: High-renge frequency
Specified Value
Torque Meter Play: TW-2412
• FM IF/RF
Tape 1: Over 60 g Tape 2: Over 50 g
• Torque Check Torque Meter
Specified Value Tape 1
Tape 2
Play: TW-2111
30 to 60 g.cm
30 to 60 g.cm
Fast forward: TW-2231
80 to 135 g.cm
55 to 120 g.cm
Rewind: TW-2231
80 to 135 g.cm
55 to 120 g.cm
• Head Azimuth
IF Detection
T201 T202
Input: FM Antenna Output:Pin 9 of IC202
Band Coverage Tracking
fL: L202 fH: TC202 fL(88.0 MHz): L201 fH(108 MHz): TC201
Input: Antenna Output: Headphone Socket (Load resistance: 32 ohms)
Specified Value/ Adjusting Point
Instrument Connection
Instrument Connection
MTT-114
Test Stage
Headphones Socket (Load resistance: 32 ohms)
* Open the cassette holder, and load the test tape directly into the mechanism. (Do not load the tape into the cassette holder.) • Tape Speed (Normal only)
MTT-111
Instrument Connection
• AM IF/RF
Test Tape
Test Tape
Specified Value/ Adjusting Point
Test Stage
Adjustment Point
Specified Value
IF
T203
Input: Antenna Output: Pin 9 of IC202
MW Band Coverage
fL: L203 fH: TC203
Input: Antenna Output: Headphone Socket
(Load resistance MW Tracking fL(600 kHz): L206 fH(1,400 kHz):TC207 32 ohms)
Instrument Connection
Tape 1,2:VR501 3,000 ± 60 Hz Headphones Socket (Loadresistance: 32 ohms)
DECK SECTION
SW1 Band Coverage
fL(2.3 MHz): L204 fH(7.3 MHz): TC204
SW1 Tracking
fL(2.6 MHz): L207 fH(6 MHz): TC209
SW2 Band Coverage
fL(7.3 MHz): L205 fH(22 MHz): TC205
SW2 Tracking
fL(8.5 MHz): L208 fH(19 MHz): TC210
• Bias Oscillation • Beat Cancel Switch: A Adjustment Point T301
Specified value 100 kHz + 4 kHz
Instrument Connection
• VCO Frequency Adjustment Point
Pin 1 of CNS108
Specified value 76 kHz ± 200 Hz
VR201 Specified Value Beat Cancel
A: 100 ± 4 kHz B: 94 ± 4 kHz C: 104 ± 4 kHz
Instrument Connection Pin 13, Pin 21 and ground of IC202
Note: After preparing the test circuit shown in Fig. 5, connect the Pin 13, Pin 21 and ground of the IC202 with the test circuit, and measure the value.
Pin 21 of IC202
Pin 13 of IC202
D
FET: 2SK212 (or Other 2SK Type FET.)
G
10 pF
S
1M ohm
0.1 µF 10K ohm
TO FREQUENCY COUNTER
Figure 5 VCO FREQUENCY TEST CIRCUIT –5–
WQ-790W CNS110 T301
BIAS OSCILLATION
fL fH T203
IC201 L201 L202
AM IF 9
VCO FM DETECTION fH fL
SW2 TRACKING
1
13
21
VR201
TC 202
TC 201
IC202
T202 TC
TC210
207 TC 203
TC209
L203 fL MW BAND COVERAGE
TC204
CNS108 1 2 3 4
fH SW1 BAND fL COVERAGE
1
TC205
FM TRACKING
fH FM BAND fL COVERAGE
FM IF T201
L204 fL SW2 BAND fH COVERAGE
L205
MW BAND fH COVERAGE
L208 MW TRACKING
SW1 TRACKING
fH fL
fH fL
MAIN PWB SW1
MW L206
L207
Figure 6 ADJUSTMENT POINTS
NOTES ON SCHEMATIC DIAGRAM •
•
•
•
•
Resistor: To differentiate the units of resistors, The symbol as K and M are used: the symbol K means 1000 ohm and the symbol M means 1000 kohm and the resistor without any symbol is an ohm resistor. The resistor designated “Fusible” is a fuse type resistor. Capacitor: To indicate the unit of capacitor, a symbol P is used: this symbol P means pico-farad and the unit of the capacitor without such a symbol is microfarad. As to electrolytic capacitor, the expression “capacitance/withstand voltage” is used. (CH),(RH),(UJ): Temperature compensation (ML): Mylar type (S): Styrol type The indicated voltage in each section is the one measured by Digital Multimeter between such a section and the chassis with no signal given. Schematic diagram and Wiring Side of P.W. Board for this model are subject to change for improvement without prior notice. Parts marked with “ ” ( ) are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.
REF. NO.
DESCRIPTION
POSITION
SW201
BAND SELECTOR
FM
SW301
BEAT CANCEL
C
SW302
RECORD/PLAYBACK
PLAYBACK
SW401
SURROUND MODE
LIVE
SELECT
–6–
SW402
SURROUND ON/OFF
OFF
SW403
SW404
DUBBING SPEED/ HIGH/FM STEREO BUILT-IN MICROPHONE/ FM MODE FUNCTION SELECTOR TAPE
SW501
TAPE 2 MAIN
OFF
SW502
TAPE 1 MAIN
OFF
SW503
TAPE 2 PLAY
OFF
SW504
TAPE 2 DIRECTION
A
SW505
VOLTAGE SELECTOR
AC220-240V
WQ-790W CNS110 T301
BIAS OSCILLATION
fL fH T203
IC201 L201 L202
AM IF 9
VCO FM DETECTION fH fL
SW2 TRACKING
1
13
21
VR201
TC 202
TC 201
IC202
T202 TC
TC210
207 TC 203
TC209
L203 fL MW BAND COVERAGE
TC204
CNS108 1 2 3 4
fH SW1 BAND fL COVERAGE
1
TC205
FM TRACKING
fH FM BAND fL COVERAGE
FM IF T201
L204 fL SW2 BAND fH COVERAGE
L205
MW BAND fH COVERAGE
L208 MW TRACKING
SW1 TRACKING
fH fL
fH fL
MAIN PWB SW1
MW L206
L207
Figure 6 ADJUSTMENT POINTS
NOTES ON SCHEMATIC DIAGRAM •
•
•
•
•
Resistor: To differentiate the units of resistors, The symbol as K and M are used: the symbol K means 1000 ohm and the symbol M means 1000 kohm and the resistor without any symbol is an ohm resistor. The resistor designated “Fusible” is a fuse type resistor. Capacitor: To indicate the unit of capacitor, a symbol P is used: this symbol P means pico-farad and the unit of the capacitor without such a symbol is microfarad. As to electrolytic capacitor, the expression “capacitance/withstand voltage” is used. (CH),(RH),(UJ): Temperature compensation (ML): Mylar type (S): Styrol type The indicated voltage in each section is the one measured by Digital Multimeter between such a section and the chassis with no signal given. Schematic diagram and Wiring Side of P.W. Board for this model are subject to change for improvement without prior notice. Parts marked with “ ” ( ) are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.
REF. NO.
DESCRIPTION
POSITION
SW201
BAND SELECTOR
FM
SW301
BEAT CANCEL
C
SW302
RECORD/PLAYBACK
PLAYBACK
SW401
SURROUND MODE
LIVE
SELECT
–6–
SW402
SURROUND ON/OFF
OFF
SW403
SW404
DUBBING SPEED/ HIGH/FM STEREO BUILT-IN MICROPHONE/ FM MODE FUNCTION SELECTOR TAPE
SW501
TAPE 2 MAIN
OFF
SW502
TAPE 1 MAIN
OFF
SW503
TAPE 2 PLAY
OFF
SW504
TAPE 2 DIRECTION
A
SW505
VOLTAGE SELECTOR
AC220-240V
WQ-790W
VOLTAGE TRANSISTOR
IC101-105 (AN6884): Spectrum Analyzer 1 2 PIN 6.13V 6.16V RADIO 6V TAPE PLAY 6V 6V 6V TAPE REC
3
4
5
6
7
8
9
6V
6V
0V
6V
0V
0V
6.5V
6V
6V
0V
6V
0V
0V
6.5V
6V
6V
0V
6V
0V
0V
6.5V
Q101 Q102 Q103 Q106 Q107 Q108 Q202 Q203 Q301 Q302 Q303 Q401 Q402 Q501 Q502 Q503 Q504 Q505 Q506 Q507 Q508 Q509
IC106-108 (BA4558): Ope Amp. PIN RADIO TAPE PLAY TAPE REC
1
2
3
4
5
6
7
8
6V
6V
6V
0V
6V
0V
6V
7V
6V
6V
6V
0V
6V
0V
6V
7V
6V
6V
6V
0V
6V
0V
6V
7V
IC201 (LA1186N): FM Front End PIN FM AM TAPE
1
2
3
4
5
6
7
8
9
1V
1.8V
0V
0V
0V
5V
1.4V
4V
5V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
IC202 (LA1805): IF Amp, & FM MPX. PIN FM AM TAPE PIN FM AM TAPE
RADIO e
1
2
3
4
5
6
7
8
9
10
11
12
1.4V
1.4V
5.6V
0.6V
1.5V
0V
0V
0V
2.3V
2.3V
5V
1V
1.6V
1.6V
6V
0.6V
0V
0V
0V
0V
2.4V
2.4V
0.5V
1V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
13
14
15
16
17
18
19
20
21
22
23
24
1V
1V
2V
1V
1.8V
1.5V
1.6V
0.4V
5.7V
1.8V
1.8V
1.8V
1.8V
1.8V
1.6V
0.6V
6.6V
6.6V 1.67V 1.67V 1.4V
0V
0V
0V
0V
0V
0V
0V
0V
0V
b
TAPE PLAY c
e
b
c
0V
0.63V 3.27V
0V
0.63V 3.27V
0V
0.63V 3.35V
0V
0.63V 3.35V
TAPE REC e
b
c
7.36V 6.52V 7.28V 7.36V 6.52V 7.28V 0V
0.69V 0.1V
0V
0.69V
0V
7.38V 6.54V 7.3V 7.38V 6.54V 7.3V 7.98V 7.37V 13.67V 7.98V 7.37V 13.67V 0.32V 0.98V 2.88V 0.32V 0.98V 2.88V 0.32V 0.98V 2.85V 0.32V 0.98V 2.85V 0V 0V
0.27V 0.27V 0V
0.4V
0V 0V
0.27V 0.27V 0.05V –0.18V 6.2V 0V
0.4V
0.5V 1.18V 5.53V 0.5V 1.18V 5.53V 0.5V 1.18V 5.53V 0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
7.43V 8.06V 13.14V 7.43V 8.06V 13.14V 0V
0V
0V
–1.74V
0V
–
0V
0.7V
0V
0V
15V
0V
8.8V
15V
0V
8.8V
0V
0V
0.70V
0V
–
0.7V
0V
0V
0.7V
0V
0.7V
0V
0.74V 0.12V
15.01V 14.23V 14.98V 15.01V 14.23V 14.98V 0V
0.74V 0.12V
0V
0.74V 0.12V
1.93V 2.57V 3.82V 1.93V 2.57V 3.82V 1.93V 2.57V 3.82V 0V
0V
0V
0V
0V
0V
5.7V 1.62V 1.62V 0V
0V
0V
IC301 (TA8189N): Record/Playback Amp. 1 2 3 4 5 6 PIN RADIO 0.98V 0.98V 2.11V 1.57V 5.7V 4.8V TAPE PLAY 0.98V 0.98V 2.11V 1.6V 5.7V 4.8V TAPE REC 0.98V 0.98V 2.11V 1.6V 5.7V 4.8V 13 PIN RADIO 1.4V TAPE PLAY 1.4V TAPE REC 1.4V
7
8
9
10
11
12
0V
0V
2V
1.2V
0V
0V
0V
0V
2V
1.2V
0V
0V
0V
0V
2V
1.2V
0V
0V
14
15
16
17
18
19
20
21
22
23
24
0V
1.29V
2V
1.4V
5.8V
0V
5.7V
5.3V
2V
1V
1V
0V
1.29V
2V
1.4V
5.8V
0V
5.7V
5.3V
2V
1V
1V
0V
1.29V
2V
1.4V
5.8V
0V
5.7V
5.3V
2V
1V
1V
IC401 (BA4558): Ope Amp. PIN 1 2 3 RADIO 3.3V 3.3V 3.3V TAPE PLAY 3.3V 3.3V 3.3V TAPE REC 3.3V 3.3V 3.3V
4
5
6
7
8
0V
3.3V
3.3V
3.3V
6.7V
0V
3.3V
3.3V
3.3V
6.7V
0V
3.3V
3.3V
3.3V
6.7V
FRONT VIEW
IC402 (LA4558): Power Amp. 1 2 3 4 5 6 PIN RADIO 14.5V 0.01V 1.1V 7.6V 0.6V 13.6V TAPE PLAY 14.5V 0.01V 1.1V 7.6V 0.6V 13.6V TAPE REC 14.5V 0.01V 1.1V 7.6V 0.6V 13.6V
7
8
9
10
0V
15V 13.7V 0.6V
0V
15V 13.7V 0.6V
0V
15V 13.7V 0.6V
PIN 11 12 13 14 RADIO 7.6V 1.1V 0.01V 0V TAPE PLAY 7.6V 1.1V 0.01V 0V TAPE REC 7.6V 1.1V 0.01V 0V
E B C
2SB1370 2SD2061 8050 C 9014 C 9015 C 9012 G
FRONT VIEW
IFR-523 HD IFR-553 PD
Figure 7 TYPE OF TRANSISTOR AND LED –7–
WQ-790W
C203 22P(CH)
C207 3P
SW201 BAND SELECTOR
R201 10
FM IF D203 1N4148
R206 47
L206
TC207
MW ANTENNA
SW201-F FM MW SW1 SW2
VC203
1
CF202 10.7MHz 1 3
2
3
4
2
FM IF
C219 0.0082(ML)
C221 3.3/50
17
16
14
15
R211 15K
13
6
5
8
7
9
VR201 10K(B) 11
10
12
C 0
VCO
T203
SW201-E R219 100
FM MW SW1 SW2
C243 7P(CH)
18
MIC/FM M NORMAL/FM STE HIGH/FM STE
T201
R204 100
C210 10/16
19
20
R210 150K
C222 3.3/50
IC202 LA1805 IF AMP.& FM MPX.
C231 0.022
C211 0.022
21
1
MW fL TRACKING fH
B
C204 0.001
22
23
24
C213 10/16
fL FM BAND fH COVERAGE
R203 22K fH fL FM TRACKING
R208 3.9K
FM DETECTION
C214 0.022
R202 33
L202
TC201
L201
VC201
2 FM RF
R205 220K
9
AM IF
SW201 BAND SELECTOR fL SW1 fH TRACKING
3
C224 1/50
2 CF203 460kHz AM IF
MW BAND COVERAGE fL fH
C225 0.012(ML)
CF201 BAND PASS FILTER 108MHz
8
7
C226 0.012(ML)
3
6
5
R209 12K
C230 22/16
1
4
C218 0.0047(ML)
T202
C208 33P(CH)
MW SW1 SW2
3
VC202
SW201-B
2
FM OSCILLATION C206 20P(CH)
FM
D202 1N4148
1
C201 0.001
C202 0.001
A
C220 470P
C212 0.022
TC202
SW201 BAND SELECTOR
FM/SW ROD ANTENNA
R207 820K
IC201 LA1186N FM FRONT END
C529 0.022
R212 10 C232 220/16
L207 C229 0.022
C
SW201-G FM C241 C239 MW 3P(CH) 0.0022 SW1 SW2 TC204 R220 220
SW1 ANTENNA L208
TC210
L203
SW1 OSC.
SW2 ANTENNA
VR202 5K(B) FINE TUNING
C237 5P(CH)
fH fL SW2 BAND COVERAGE
SW201-A
C233 0.022
fL SW1 BAND fH COVERAGE
TC205 SW2 fH TRACKING fL
FM MW SW1 SW2
R222 47
C240 0.0047
VC204
C245 12P(CH)
MW OSC. L204
C236 5P(CH)
R214 12K
SW201-D FM MW SW1 SW2 R218 100 R213 12K
C256 0.022
D527 1N4148 C534 4.7/50
R215 2.2K
SW201 BAND SELECTOR
R223 47
C242 0.022
L205 SW2 OSC.
C227 1/50
C228 1/50
R221 47
SW201-H
FM MW SW1 SW2
L206,L207 MW/SW1 BAR ANTENNA
FM MW SW1 SW2
C235 10P(CH)
TC203
R216 2.2K
C244 5P(CH)
TC209 SW201-C
C238 360P
CD/LI RAD TA
D516 1N4148
R327 100K
C311 0.0082(ML)
C260 1/50
C527 470P
R454 2.2K
A B C C357 C356 120P 430P
T301 BIAS OSCILLATION R453 2.2K
C353 0.0056(ML) C354 0.01(ML)
R355 18K R533 47K VR501 470(B)
C352 100/16
R
TAPE SPEED R561 47
SW403 DUBBING SPEED/ BUILT-IN MICROPHONE/ FM MODE
R451 47K
C416 220/16
Q503 9015 C TAPE SPEED CONTROL
R560 56K
R413 10K
C411 4.7/50 R409 12K
R411 12K
R403 10K
5
C413 1/50
– (2/2) + 4
7
IC401 BA4558 OPE AMP. C404 10/16
R510 10K
IC502 KA7809 VOLTAGE REGULATOR
R508 10K
1
Q504 9014 C TAPE SPEED CONTROL
3 2
Q505 9014 C TAPE SPEED CONTROL
C512 0.1
C511 220/16 L501 47µH
FM SIGNAL MW/SW1/SW2 SIGNAL PLAYBACK SIGNAL
R336 100
RECORD SIGNAL
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 6. 1
2
3
4
Figure 8 SCHEMATIC DIAGRAM (1/4) –8–
5
6
R416 10K
C410 4.7/50
6
R512 10K
SW302 RECORD/ PLAYBACK
R412 12K R410 R405 12K 10K
R407 2.7K
R506 3.9K
C521 0.0033(ML)
HIGH/ FM STEREO NORMAL/FM STEREO P R MIC/ SW302-A FM SW403-B MONO P
C409 0.0033(ML)
TAPE RADIO CD/LINE
C362 0.015(ML)
SW302-F
R332 10
C263 1/50
1
SW404 FUNCTION SELECTOR
R314 22K
R316 330K
L302 2.7mH
R323 10K
Q301 8050 C BIAS OSC.
R247 1K
C261 1/50
C412 1/50
8
+ (1/2) –
C415 100/16
R250 18K
C314 4.7/50
R362 270
R318 2.2K
AC BIAS CIRCUIT R333 27K
Q203 9014 C LINE AMP
SW404-D C318 10/16
2
R243 100
C259 1/50
R241 150K C316 330P
3
R245 100
12
R321 12K
GND R-CH
11
R513 10K
J2 CD/LINE
G
10
R330 100
L-CH
9
C351 0.022
L303 22mH
SW301 BEAT CANCEL R452 47K
C258 1/50 R364 1M
C323 22/16 C517 150P
13
C312 0.0082(ML)
C515 130P
R306 56
8
7
R368 18K
R308 150K
C304 470P
A SW504-B SW504 TAPE2 DIRECTION
14
R320 180K
R304 180K
C306 33/16
SIDE-B
6
5
R324 10K
LB GB RB
4
C366 330P
C355 0.0015(ML)
F
1 2 3
C302 0.001(ML)
CNH107 1 2 3
CNS107
L-CH
B
15
C320 4.7/50
3
C310 4.7/50
2
R312 4.7K
1
C364 330P
R-CH
16
17
18
R325 10K
R
A
SIDE-B SIDE-A
19
IC301 TA8189N RECORD/PLAYBACK AMP.
PLAYBACK HEAD SW504-A SIDE-A
B
20
C308 0.033(ML)
R P
21
R310 3.9K
P
22
IC401 BA4558 OPE AMP.
R415 10K
C315 330P
C338 47/16
SW302-D
SW302-E TAPE2
23
Q202 9014 C LINE AMP
R408 2.7K
R317 180K
R562 2.7K
R249 18K
C313 4.7/50
R406 330
C262 1/50
R240 150K
R361 270 C317 10/16
C363 330P 24
D201 1N4148
R246 1K
SW404-C
R315 330K
R401 100
R354 18K
R563 2.7K
R303 180K
R313 22K
C408 0.0033(ML)
C319 4.7/50
C365 330P
C326 2.2/50
C309 4.7/50
+
C305 33/16
C303 470P
ERASE HEAD
R309 4.7K
C301 0.001(ML)
R319 2.2K
C327 1000/10
R311 150K
R367 18K
R404 10K
C307 0.033(ML)
E
SW404 FUNCTION SELECTOR
C520 0.0033(ML)
TAPE RADIO CD/LINE
C325 47/16
LA GA BA RA
L361 2.7mH
R326 33K
R305 56
1 2 3 4
R532 47K
R
C361 0.015(ML)
P
R328 100
R
R307 3.9K
1 2 3 4
R-CH
P
CNS108
CNH108
D
RECORD/PLAYBACK HEAD L-CH
D521 1N4148
Q509 9014 C DUBBING CONTROL R559 100K
C528 470P
L304 22mH
SW302 RECORD/PLAYBACK SW302-B SW302-C
TAPE1
R322 12K
C401 470/16
C321 130P
C516 150P
WQ-790W
SW403 DUBBING SPEED/ BUILT-IN MICROPHONE/ FM MODE MIC/FM MONO
R531 1K
SW403-A
R565 5.6K R557 1K R556 150K
R345 1K
MAL/FM STEREO GH/FM STEREO
C533 4.7/50
R211 15K
R555 4.7K
MIC1
C343 500P
R343 330
R558 33
MIC VOLUME
MIC2
MICROPHONES
C532 500P C536 47/16
D520 1N4148
R552 4.7K C344 4.7/50
Q303 9014 C MIC AMP.
Q508 9014 C MIC AMP.
C342 470/16
Q302 9014 C MUTE
CO
R346 470K
VR301 50K(B)
R341 10K C223 0.0015
R344 4.7K C341 4.7/50
R534 4.7K
R554 680
R553 680
C345 0.0047(ML)
1 C347 10/16
R350 3.9K
R351 1K
R349 2.2K
2
C529 0.022
CNS109 CN2
R217 330 C232 220/16
1 2
A
SW402-A OFF
C450 2.2/50(N.P)
Q402 9014 C POWER MUTE 2
C424 0.0015(ML)
3
L-CH SPEAKERS
SP1 FULL-RANGE
R422 120
7 C429 100/16
9
J1 HEADPHONES
C431 0.18(ML) R423 120
11
C433 1000/10
8
Q507 9014 C SWITCHING
C502 0.1
POWER PWB-C
1
2
2
D501
DC15V[" D " ISIZE(UM/SUM-1, R20 OR HP-2)BATTERYx10]
CNS102
R418 3.3K
C537 10/16
5
5 4 3 2 1
C471 820P
CNH102 VCC GND LO0 RO0 RI0 LI0
C407 10/16
BATTERYS
D501~D504'RL202DC
5 4 3 2 1
SO501 AC POWER INLET SOCKET AC110-127V/ 220-240V 50/60Hz
AC220-240V 50/60Hz AC110-127V 50/60Hz
D507 1N4001
R419 3.3K
SW505 VOLTAGE SELECTOR
T501 POWER TRANSFORMER
D502 C503 0.1
1
F501 T2A L250V
C501 0.1
C522 3300/25
SW404 FUNCTION SELECTOR
D523 1N4148
C432 0.18(ML) C430 100/16
C469 220/16
CNS110
R537 10K
4 6
C504 0.1
R501 4.7 FUSIBLE
D518 1N4148 D509 SW404-B 1N4001
TAPE
CD/LINE
D505
R545 22K
SP3 SURROUND
C437 470/25
T1.25A L250V
R535 330/1W
RADIO
C508 0.1
C507 100/16 C505 10/16
D524 1N4148
1 D401 1N4001 F1
Q506 2SB1370 SWITCHING
D522 1N4148
C414 C417 0.0033(ML) 0.0033(ML)
C423 0.0015(ML)
Q401 9014 C POWER MUTE
R548 100
R502 680
12 13
Q501 8050 C VOLTAGE REGULATOR
D525 1N4148
D305 1N4148
C421 1/50
R420 10K FUSE RESISTOR
14
C425 100/16
R441 10K
C440 10/16
R440 27K
C426 100/16
R416 10K
SP2 FULL-RANGE
R-CH SPEAKERS
D504
C422 1/50
D503
R442 10K
R415 10K
1 2 3 4 5 6
C434 1000/10
C428 0.01(ML)
10
5
IC402 LA4508 POWER AMP.
R421 10K
CNH110
R567 22K
C535 4.7/50
1 2 3 4 5 6
SP4 SURROUND
C427 0.01(ML) D519 1N4001
R564 22K
TWL L-CH GND GND R-CH TWR
C459 2.2/50(N.P)
D517 1N4148
Q510 9014 C MUTE
12 50
CNS106
LIVE
HALL
LIVE
D402 1N4148
CN207 P12 1-F
CNH106
SW401 SURROUND MODE SELECT SW401-A
SW401-D
D515 1N4148
C530 4.7/50
FROM GRAPHIC EQUALIZER PWB
CN4
SW401-B SW401 SURROUND MODE SELECT
SW404 FUNCTION SELECTOR
HALL
HALL
ON
LIVE
LIVE
SW402-B SW402 SURROUND ON/OFF ON OFF
D526 1N4148 SW404-A
1 2 3 4 5 6 7
SW402 SURROUND ON/OFF
SW401-C
CD/LINE RADIO TAPE
SW504-C B
CNS2
1 2
SW504 TAPE2 DIRECTION
HALL
SW401 SURROUND MODE SELECT R566 100K
6 16
2 CNH109
R450 4.7K
56 22
527 4148
BUILT-IN MICROPHONE MIC101
1
C346 4.7/50
C473 0.068
1
R471 8.2K
R472 8.2K
VR401-A 50K(B) VOLUME
VR401-B 50K(B) VOLUME
1 2 3 4 5 6
C474 820P
C472 0.068
VOLUME PWB-B1 FROM GRAPHIC EQUALIZER PWB
CNS101
CN205 P12 1-C 1 2 3 4 5 6 7 8 9
R568 1K
1 H
10
CNS105
1 2 3 4 5 6 + 7 – 8 B 9 A 10
SW502 TAPE1 MAIN SW501 TAPE2 MAIN SW503 TAPE2 PLAY
M
M501 TAPE MOTOR
CNS1
MAIN PWB-A
7
8
9
10
Figure 9 SCHEMATIC DIAGRAM (2/4) –9–
11
12
WQ-790W CNS2 2 1
SW502 TAPE1 MAIN
CNS1
A
WH WH GR GR BL BL RD BK YL PK
1 2 3 4 5 6 7 8 9 10
B
SW504 TAPE2 DIRECTION
A
TAPE 2
HEAD FLEXIBLE PWB
PLAYBACK HEAD (300-6)
SW501 TAPE2 MAIN SW503 TAPE2 PLAY
CNH107
RD
BK
GY
WH
WH
BK
3 2 1
RD BK
B
RECORD/PLAYBACK HEAD(300-4)
ERASE HEAD(300-5)
TAPE 1
WH
AB+BK
RD
BK
M501 TAPE MOTOR TAPE MECHANISM GND
R160 R158
R625
D124 R624
R619 D118
D123 R623
R618
R622
R171
C153
1 2 3 4 5 6 7 8 9
IC101
R621
IC102
1 2 3 4 5 6 7 8 9
C150
R611
R616
R612 1 2 3 4 5 6 7 8 R167 9
C147
IC104 IC103
1 2 3 4 5 6 7 8 9
C148
1 C144 2 3 4 5 6 7 8 R163 9
R175
C141
R173
R164 C142
R471
R472
C473
CN205
C151
C472
C471
VOLUME PWB-B1
CNH102
C474
VR401
1 2 3 4 5
VOLUME
L-CH
R-CH
F
SP1 FULL-RANGE
SP2 FULL-RANGE
SP4 SURROUND
SP3 SURROUND
G BK
RD
CNH106 WH RD BK
RD BK
BK RD WH
RD RD
COLOR TABLE
BR
RD(R)
BROWN
RED
OR
YL
GR
ORANGE YELLOW GREEN
BL
VL
GY
WH(W)
BK
PK
BLUE
VIOLET
GRAY
WHITE
BLACK
PINK
6 5 4 3 2 1
H
1
2
3
4
Figure 10 WIRING SIDE OF P.W.BOARD (1/3) – 10 –
5
6
C154
R169 1
5
R191
1 2 3 4 5 6
R620 D119
D116 R617
R606
R602
R610
R155 C145
R156
C143
C127
R614
D113 D108 D112 D107
D103
R632
R631
R641
R601
R157
R159
C152
D114
R603 D122 R607 R613 D117 D121 D106 D111 D101
IC105
R154
C139
R141 C177
R636
R638
R152
E B C
R615
R609 D109
R608
R604
Q107
R628
C138
2 3 4
IC108
C155
R110 C123 C128
1
8 7 6 5
C140
R172
R165
5
R176
C146
D125
D120
D102 C135
R153
2 3 4
C133
1
8 7 6
D104
D130
C149
R168
R150
R144 C129
IC107
D134
D131
C181
R642
R151
R143 R644
C132
R145 R148
1 2 3 4
7 6 5 R142
C134
R605
D126
D115
D110
R177
E
R149
C106
C105
Q101
C B E
D127
D105
R637 R626
R627
D128
Q106 E B C
R137
R135 C176
C B E
8
R106
C125
C124
C102
6
C118
IC106
B VR101
R645
R122 R118 R116 R111 R112
R124
C103
B VR102
C105
D135 D132
D136 D133 D129
1 7
C130
C116
R136
C126
R138
R102
C120
R104
R101
C122
1
B VR103
Q102
R128
R130
R134
B VR104
R123
B VR105
R117
C113 R129
C11
1
C10
7
C10
9
C10
8
C110
2 C11
4 C11
R132
R629
R181
C180
R650
C182 R643
R651
R131
R103
C184
C185
R183
C183
A
R147
A
C121 R133
D
R184
8
4
A
R640 C191
R180
E C B
R146
A
Q103
R182
C131
A
17
C1
R10 09 R1C 11 5
R127
R107 R115
R119
R126 R121 R125
SPECTRUM ANALYZER
GRAPHIC EQUALIZER PWB-B2
VR101 X-BASS
330Hz
R113
C119
1KHz
1 R1
3.3KHz
R120
10KHz
CN207
1 2 3 4 5 6 7
VR102~VR105 GRAPHIC EQUALIZER
C
WQ-790W
RD WH BK
SW402 SURROUND ON/OFF
A
C408
ON
IC401
C415
R450 SW401 C
R413
B A
D
HALL
R405
C
B
D
A
R566
D517 C220 R207
R210
C256
VC203
VC202
VC204
TC202
TC203
C243
TC205
C235
R220
C242
R205
L203 R222
L204
SW403
TC204
C241
L205 R223
A
B
MAIN PWB -A L206 MW
L207 MW/SW1 BAR ANTENNA
SW1
(281) FM/SW ROD ANTENNA(277)
7
8
9
10
Figure 11 WIRING SIDE OF P.W.BOARD (2/3) – 11 –
11
12
FM STEREO FM MONO
VC201
C233
TC207
SW2 SW1 MW FM
A
H
TC201
VR202 FINE TUNING
C213
T202
SW201 BAND SELECTOR
D202
C214
L202
R221
B
G C244
SW403 DUBBING SPEED/ BUILT-IN MICROPHONE/FM MODE HIGH NORMAL MIC
24
SW201
R219
TC210
20
C
F
C238
R202
C245
TC209
IC202
C225
D
E
C240
R204
R209 C218
C239
C210
C211
C212
C534
D516
R203 D203
L208
C222
C237
R401
D507
C219
C236
C401
13
R208
CF201 3 2 1
1 C201 2 L201 3 4 5 6 7 8 C207 9
R218
STAND-BY
C409
C411
C203
R247
R201
C202
R206
VR201
15
1
C206
CF202 1 2 3
VCO C223
LIVE
SW404 FUNCTION SELECTOR CD/LINE RADIO TAPE
R407
R411
R406
C413
R415
R403 R409
OFF
SW401 SURROUND MODE SELECT
ON
R412
C412
8 7 6 5
MICROPHONES
MIC1
VR301
R531 R533
R355
R554
R555
C323 R341 Q302 R354
R532
C520
R250
R314
L302
C314 C312
MIC2
R 32 1 C5 27
C320
IC301 C327 R416 C404
R418 C414
C416
1 2 3 4
C417 R212 CF203 C226
5 C230
C204
R246 R240 R245
T201
R451
MAX
C221 10
C208
R241
R513
R346 C532 C343 R556 R349 C341 C344 R534 C346 CNS109 C345
C536 Q303
SW302 C342
R312
R310
R308 C306
C366
C310
C364
R325
C316 C318
C365
C363 R313
R419
CNS102 CNS101
C410
R408 R410 R404
12
C231
IC201
Q203
C B E
Q202
C B E
R243
Q504
C229
1 2 3
C258
Q503
R512
R454 R453
C263
E B C E B C
E B C
VR301 MIC VOLUME MIN
SW402
R211
C228
C260
R508 Q505
L-CH
R-CH
C517
C516 R311
R307
C315 C313
R327
C262 VR501
R452
E B C
B
C227 C224
T203
R561 TAPE SPEED
R216
C529
C259
R213
R217
R510
R560 R506
R215
C261
R214
1 2 3 4 5 6 7 8 9 10
J2 CD/LINE
R318
C232
CNS105
J2
R323
R324
SW404
D509
D507
R552
R368
R320 R316
D201
C450
R553
C533
L501
C511
E B C
C521
BK D523
CNS106
C512
C537
C407
C535
6 5 4 3 2 1
D526
R568
C307
R336 R367
D521
3
C459
R309
C309 C305 C319 R559
D305 Q401
C423 C424
Q402
1 2 3 4 5
R558
C325
D525
D524
2
C530
R548 C507 C421
C425 C428
IC402
Q510
R344
R362 C362
C338
R328
E B C
R557
R304
12
R364
R326
R420
10
MIC101 BUILT-IN MICROPHONE
1 2
R343
Q508
5
15
C422
E B C
C304
13
R440
R442
F
R555
C326 C311
R249
C469
IC502 1
R441
E B C
R361 C361
R562
D401
C432 C434
R423
R319 L361
C440
E
C302 R306 1
20 C317 R315
Q509
C515
D
C303
R317
R421
C B E
C
C301 R305 24
R303
E B C
R563
R422
CN2 R345
CN4 R502
D518 Q501
R501 C430
C431
C429
J1 HEADPHONE
D515
D402
C351
14 13 12 11 10 9 8 7 6 5 4 3 2 1
C522
6 5 4 3 2 1
C505
C437
C433
C426
CNS110
C427
2 1
P14 5-C
C528
B
2 3 4 CNS108
2
C347
R351 R350
CNS107 1 2 3
D520
D505
C B E
R567
CNH110
R322
1
C321
A
C508
Q301 C354
FROM POWER PWB
1 2
D519
B C E Q506
R564
R535
F1 T1.25A L 250V
1 2 3 4 5 6 7
CNH109 1
L303
L304
SW302 RECORD/ PLAYBACK PALY REC.
803C
E B C
Q507
C352 R545
D522
C356
B A
A
T301
C
R330
R537 C355
B
C357
C
SW301
SW301 BEAT CANCEL
R333 C353
R332
1 2 3 4 CNH108
E B C
BK
BK
RD RD
WQ-790W FM SIGNAL
GRAPHIC EQUALIZER VR102-A VR102-B 330Hz
X-BASS VR101-A VR101-B
A
VR103-A VR103-B 1kHz
VR105-A VR105-B 10kHz
VR104-A VR104-B 3.3kHz
R138 3.9K
R128 1.5K
R126 3.3K
VR105-A 100K(B)
C114 100P
VR104-A 100K(B)
VR102-A 100K(B)
VR103-A 100K(B) R122 2.2K
R136 680K
R134 1K
R132 820
R191 100
1
R108 12K C116 0.022(ML)
1
C118 0.022(ML)
C120 0.012(ML)
C122 0.0068(ML)
C124 1/50
2
CNS101 P9 10-G
R104 560
3 R102 4
R645 68K
R109 18K
R113 8.2K
R115 5.6K
R119 4.7K
R107 12K C115 0.022(ML)
R121 2.2K
R125 3.3K
VR104-B 100K(B) R127 1.5K
R129 820
C113 100P
C105 0.022
R123 3.3K
C111 0.0022(ML)
6
R117 4.7K
R111 8.2K
VR102-B 100K(B) C109 0.0068(ML)
R105 12K
6
VR101-B 50K(B)
C
C107 0.01(ML)
5
VR103-B 100K(B)
1K
R131 820
R135 3.9K
R137 680K
C177 500P
C125 1/50
R133 1K
C121 0.0068(ML)
C119 0.012(ML)
C117 0.022(ML)
Q101 GRAPHIC 9014 C EQUALIZER AMP.
VR105-B 100K(B)
TO MAIN PWB
C126 1/50
R142 68K
CN205
R120 4.7K
R116 5.6K
C176 500P
GRAPHIC EQUALIZER AMP.
B
R114 8.2K
R130 820
Q102 9014 C
R644 68K
R103 560
R124 3.3K
C112 0.0022(ML)
R101 1K
R118 4.7K
C110 0.0068(ML)
C106 0.022
C102 0.1 C103 470/16
VR101-A R110 50K(B) 18K C108 0.01 (ML)
R112 8.2K
R106 12K
C123 1/50
D
R182 33 R180 2.2
Q103 2SD2061
C180 100/16
D131
C184 10/16
C183 0.1
R183 5.6K
C181 0.1
VOLTAGE REGULATOR
R181 680
E
+B
C182 100/16
FUSIBLE
R184 47K
C185 10/16
R631 56K R632 56K CN207
1
1
+B
15V GND
2
F
HALL TO MAIN PWB CN4 P9 12-C
+B
3 LIVE
4
A-SIDE
5
B-SIDE
6 7
R651 330
R641 82K +B
STEREO 7 R650 330
G
D135 LIVE
R628 330
R642 330
R629 330
R643 330
D128 LIVE
D132 LIVE
D129 HALL
D133 HALL
R627 330
R626 330
D127 A-SIDE
D126 B-SIDE
D1 1N4
D130 STEREO
D136 HALL +B
+B D126~D129 D132,D133 D135,D136
IFR-553PD
D130:IFR-523HD
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 6. 1
2
3
4
Figure 12 SCHEMATIC DIAGRAM (3/4) – 12 –
5
6
WQ-790W
C154 10/16
R622 47
R621 47
D122
D121
6
5
D121~D123:IFR-553PD D124,D125:IFR-523HD
R176 8.2K
1
R623 47
IC106 BA4558
2
D123
C155 1/50
3
R624 47
5
4
D124
C127 82P
R177 100
+B 7
7
R175 82K
C126 1/50
8
+ (1/2) –
C153 10/16
EQUALIZER AMP.
6
C128 1/50
8
9
R141 220K
R625 47
IC106~IC108 BA4458 OPE AMP.
D125
IC101~IC105 AN6884 SPECTRUM ANALYZER IC101 AN6884
3
R168 8.2K
C148 10/16
R619 47
R618 47
R617 47
R616 47
D119
D118
D117
D116
2
1 R611 47
D112
D111
+(2/2) 1 – IC107 BA4558
3
R612 47
C149 1/50 4
4
6
5
D111~D113:IFR-553PD D114,D115:IFR-523HD
R150 1.8K
7
R169 100
R151 390K 2
R149 2.2K
8
9
R613 47
B
C133 0.0033(ML)
R620 47
+B
IC103 AN6884
+B C134 0.015(ML)
D12O
8
+ (1/2) 7 – IC107 BA4558
D113
5
1
R614 47
R147 1.8K
C151 10/16
2
D116~D118:IFR-553PD D119,D120:IFR-523HD
R172 8.2K
R148 390K 6
R146 2.2K
C152 1/50
3
5
D114
C131 0.0082(ML)
R173 100
4
6
R615 47
C132 0.047(ML)
3
7
D115
125 /50
R145 1.8K
8
9
4
+ (2/2) 1 – IC106 BA4558
R171 82K
2 R143 2.2K
R167 82K
35 9K
IC102 AN6884
R144 390K
C129 0.033(ML)
C15O 10/16
C130 0.15(ML)
C147 10/16
R142 68K
+B
+B
C191 22/16
+B
R159 8.2K
Q107,Q106 SPECTRUM ANALYZER LED CONTROL Q106 9014 C
R640 33K
C141 10/16
R607 47
R606 47
R610 47
D107
D106
2
1 R601 47
6
5
D101,D102:IFR-523HD D109,D110
R636 1K
3
D101
R637 56K
C145 10/16
4
D102
D134 1N4148
R158 100
+B
Q107 9012 G
7
R602 47
+B R638 56K
8
9
R603 47
3
IC105 AN6884
D103
R156 1.8K
+B 4
+ (2/2) 1 – IC108 BA4558
R604 47
2 R155 2.2K
C142 1/50
D104
C140 560P
R157 390K
D103~D108:IFR-553PD
R165 8.2K C139 0.001(ML)
D110
C146 1/50
1
D108
R164 100
2
R608 47
+B
3
D109
R609 47
+ (1/2) 7 – IC108 BA4558
4
5
R605 47
5
6
D105
R153 1.8K
7
R163 82K
R152 2.2K
8
9 8
R160 82K
6
C144 10/16
C138 0.001(ML)
IC104 AN6884
R154 390K
C143 10/16
C135 0.0047(ML)
+B
GRAPHIC EQUALIZER PWB-B2 7
8
9
10
Figure 13 SCHEMATIC DIAGRAM (4/4) – 13 –
11
12
WQ-790W
A
RD RD
B
SO501 AC POWER INLET SOCKET AC110V-127V 50/60Hz AC220V-240V 50/60Hz
POWER PWB-C
RD
RD
CNH110 RD 1 TO MAIN PWB CNS110 BK 2 P11 7-B
1 2
C
F501 T2A L 250V
D504 C504 D
D501 C501 D502 C502 T501 POWER TRANSFORMER
COLOR TABLE
D503 C503
E
BR
BROWN
RD(R)
RED
WH
BK BL RD
WH
ORANGE
YL
YELLOW
GR
GREEN
BL
BLUE
VL
VIOLET
GY
GRAY
WH(W)
WHITE
BK
BLACK
PK
PINK
BK
F
OR
AC220-240V
(280)
BATTERYS DC15V [ "D" SIZE (UM / SUM-1, R20 or HP2) battery X10 ]
AC110-127V
G SW505 VOLTAGE SELECTOR
(281) (279) H
1
2
3
4
Figure 14 WIRING SIDE OF P.W.BOARD (3/3) – 14 –
5
6
