Sharp CD-C831W User manual

– 1 –
CD-C831W
No. S5934CDC831W/
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
VOLTAGE SELECTION..................................................................................................................................................... 2
SPECIFICATIONS ..............................................................................................................................................................3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 9
ADJUSTMENT ................................................................................................................................................................. 10
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 12
BLOCK DIAGRAM ........................................................................................................................................................... 13
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................16
VOLTAGE ........................................................................................................................................................................ 32
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 33
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 34
FUNCTION TABLE OF IC................................................................................................................................................ 39
FL DISPLAY......................................................................................................................................................................46
PARTS GUIDE/EXPLODED VIEW
CD-C831W
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
SERVICE MANUAL
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
CD-C831WminicomponentsystemconsistingofCD-C831W
(Mainunit), CP-C831(Front speaker)and GBOXS0025AWM1
(Surround speaker).

CD-C831W
– 2 –
SAFETY PRECAUTION FOR SERVICE MANUAL
WARNINGS
THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANTTHATTHEFOLLOWINGPRECAUTIONSAREOBSERVEDDURINGSERVICINGTOPROTECTYOUREYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHENTHECABINETISREMOVED,THEPOWERISTURNEDONWITDOUTACOMPACTDISCINPOSITIONANDTHE
PICK-UP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICK-UP LENS.
2-THE LASER POWER OUTPUT OF THE PICK-UP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY
PRE-SET BEFORE SHIPMENT.
DO NOT ATTEMPT TO RE-ADJUST THE LASER PICK-UP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICK-UP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
CAUTION
This Mini Component System is classified as a CLASS
1 LASER product.
The CLASS 1 LASER PRODUCT label is located on the
rear cover.
Use of controls, adjustments or performance of proce-
dures other than those specified herein may result in
hazardous radiation exposure.
As the laser beam used in this compact disc player is
harmful to the eyes, do not attempt to disassemble the
cabinet. Refer servicing to qualified personnel only.
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO
BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA
EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.
VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE.
ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT
INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE
INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.
VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
QACCB0008AW00
VOLTAGE SELECTION
The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCE0011AW00
92LCoRDZ1652A
QACCL0002AW00
92LCoRD577B
92LPLUG027 92LPLUG155A

– 3 –
CD-C831W
Cassette deck section
Type: Compact cassette tape
Frequency response: 50 - 14,000 Hz (Normal tape)
Motor: DC motor with electronic
governor x 1
Signal/noise ratio: 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/
playback)
Bias and erasure system: AC
Tape speed: 4.76 cm/sec. (1-7/8 ips.)
Wow and flutter: 0.15 % (WRMS)
Heads: TAPE-1: Playback x 1
TAPE-2: Record/Playback x 1
Erase x 1
Front speaker section
Type: 2-way [13 cm (5-1/4") woofer
and 5 cm (2") tweeter]
Maximum input power: 60 W
Rated input power: 30 W
Impedance: 6 ohms
Dimensions: Width; 220 mm (8-11/16")
Height; 300 mm (11-13/16")
Depth; 217 mm (8-9/16")
Weight: 2.6 kg (5.7 lbs.)/each
Surround speaker section
Type: 10 cm (4") full range speaker
Maximum input power: 20 W
Rated input power: 10 W
Impedance: 16 ohms
Dimensions: Width; 170 mm (6-3/4")
Height; 170 mm (6-3/4")
Depth; 88 mm (3-1/2")
Weight: 0.4 kg (0.9 lbs.)/each
CP-C831
GBOXS0025AWM1
General
Power source: AC 110/127/220/230-240 V,
50/60 Hz
Power consumption: 89 W
Dimensions: Width; 270 mm (10-5/8")
Height; 300 mm (11-13/16")
Depth; 351 mm (13-13/16")
Weight: 6.4 kg (14.1 lbs.)
Amplifier section
Output power: MPO; 144 W (72 W + 72 W)
(10 % T.H.D.)
RMS; 80 W (40 W + 40 W)
(10 % T.H.D.)
RMS; 66 W (33 W + 33 W)
(0.9 % T.H.D.)
Input terminal: Video/Auxiliary (audio signal);
500 mV/47 kohms
Output terminals: Front speakers; 6 ohms
Surround Speakers; 16 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Compact disc player section
Type: 3-disc multi-play compact disc
player
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
D/A Converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)
Tuner section
Frequency range: FM; 88 - 108 MHz
AM; 531 - 1,602 kHz
Specifications for this model are subject to change without
prior notice.
SPECIFICATIONS
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CD-C831W

CD-C831W
– 4 –
NAMES OF PARTS
Front Panel
1. Disc Number Selector Buttons
2. Disc Tray
3. Multi Indicator
4. Disc Skip Button
5. Open/Close Button
6. Extra Bass Indicator
7. FM Stereo Mode Indicator
8. FM Stereo Indicator
9. (CD) Repeat Indicator
10. (CD) Play Indicator
11. (CD) Pause Indicator
12. (CD) Disc Number Indicators
13. (CD/TUNER) Memory Indicator
14. Timer Play Indicator
15. Timer Record Indicator
16. Sleep Indicator
16. Dynamic PTY Indicator
17. Spectrum Analyzer/ Volume Level Indicator
18. (TAPE 2) Racord Indicator
19. Timer Set Indicator
20. (CD) Track Down/Review Button
(TUNER) Preset Down Button
(TAPE 2) Rewind Button
21. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
(TAPE 2) Fast Forward Button
22. Timer/Sleep Button
23. Clock Button
24. On/Stand-by Button
25. Equalizer Mode Selector Button
26. Dimmer Button
27. Extra Bass/Demo Mode Button
28. Headphone Socket
29. Function Selector Buttons
30. (TAPE 2) Record Pause Button
31. Memory/Set Button
32. (CD/TAPE) Stop Button
33. (TAPE) Play Button
(CD) Play/Repeat Button
34. Tuning and Time Up/Down Buttons
35. Volume Up/Down Buttons
36. (TAPE 1) Cassette Compartment
37. (TAPE 2) Cassette Compartment
CD-C831W
17 18
14
35
6
123 45
7
8
13
15
11 12
10
9
16
19
33
25
26
27
28 29 30 31
20 21
24
22
23
32 34
37
36

– 5 –
CD-C831W
Front Speaker
1. Tweeter
2. Woofer
3. Bass Reflex Ducts
4. Speaker Wire
Surround Speaker
1. Full Range Speaker
2. Speaker Wire
CP-C831
GBOXS0025AWM1
Remote Control
1. Remote Control Transmitter LED
CD Control section
2. Disc Number Select Buttons
3. Memory Button
4. Pause Button
5. Clear Button
6. Track Down/Review Button
7. Track Up/Cue Button
8. Disc Skip Button
9. Play/Repeat Button
10. Stop Button
11. Random Button
Tuner control section
12. Preset Up/Down Buttons
Tape control section
13. (TAPE 1) Play Button
14. (TAPE 2) Record Pause Button
15. (TAPE 1/2) Stop Button
16. (TAPE 2) Play Button
17. (TAPE 2) Rewind Button
18. (TAPE 2) Fast Forward Button
Common section
19. Equalizer Mode Selector Button
20. Function Selector Buttons
21. On/Stand-by Button
22. Extra Bass Button
23. Volume Up/Down Buttons
Rear Panel
1. AC Voltage Selector
2. AC Power Input Socket
3. AM Aerial Terminal
4. Aerial Earth Terminal
5. FM 75 Ohms Aerial Socket
6. Video/Auxiliary (Audio Signal) Input Sockets
7. Span Selector Switch
8. Surround Speaker Terminals
9. Front Speaker Terminals
5
1
6
2
3
4
7
8
9
1
2
34
1
2
1
8
3
410
9
5
6
7
11
12
13 14 16 17 18
20
19
21 23
2
15
22

CD-C831W
– 6 –
OPERATION MANUAL
TUNING/ TIME ( )
MEMORY/ SET
CLOCK
ON/ STAND-BY
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Press the CLOCK button.
3
Within 5 seconds, press the MEMORY/SET button.
4
Press the TUNING/TIME ( or ) button to select the time display mode.
"0:00" →The 24-hour display will appear. (0:00 - 23:59) "AM 12:00" →The 12-hour display will appear. (AM or PM 12:00 - 11:59) "AM 0:00" →The 12-hour display will appear. (AM or PM 0:00 - 11:59)
Note that this can only be set when the unit is first installed or it has been reset.
5
Press the MEMORY/SET button.
6
Press the TUNING/TIME ( or ) button to adjust the hour.
Press the TUNING/TIME ( or ) button once to advance the time by 1 hour. Hold it down to advance continuously. When the 12-hour display is selected, "AM" will change auto- matically to "PM".
7
Press the MEMORY/SET button.
8
Press the TUNING/TIME ( or ) button to adjust the minutes.
Press the TUNING/TIME ( or ) button once to advance the time by 1 minute. Hold it down to change the time in 5 minute intervals. The hour setting will not advance even if minutes advance from "59" to "00".
9
Press the MEMORY/SET button.
The clock starts operating from "0" seconds. (Seconds are not displayed.)
To see the time display: Press the CLOCK button.
The time display will appear for about 5 seconds.
AM 12:00AM 0:000:00
2 3
4
7
6 5
8 9
Note:
The clock display will flash on and off at the push of the CLOCK button when the AC power supply is restored after a power failure occurs or after the AC power lead is discon- nected. If this happens, follow the procedure below to change the clock time.
To change the clock time:
Press the CLOCK button. Within 5 seconds, press the MEMORY/SET button. Perform steps 6 - 9 above.
To change the time display mode:
Perform steps 1 - 2 in the section "RESETTING THE MICRO- COMPUTER". Perform steps 1 - 9 above.
(Main unit operation)
In this example, the clock is set for the 24-hour (0:00) system.
SETTING THE CLOCK
1 2
1
2
3
PREPARATION FOR USE
15
15
Remote control
Notes concerning use:
Replace the batteries if the operating distance is reduced or if the operation becomes erratic. Periodically clean the transmitter LED on the remote control and the sensor on the main unit with a soft cloth. Exposing the sensor on the main unit to strong light may in- terfere with operation. Change the lighting or the direction of the unit. Keep the remote control away from moisture, excessive heat, shock, and vibrations.
0.2 m - 6 m (8" - 20')
AM/FM interval (span)
The International Telecommunication Union (ITU) has estab- lished that member countries should maintain either a 10 kHz or a 9 kHz interval between broadcasting frequencies of any AM station. The illustration shows the 9 kHz interval zones (regions 1 and 3), and the 10 kHz interval zone (region 2). Before using the unit, set the SPAN SELECTOR switch (on the rear panel) to AM tuning interval (span) of your area.
To change the tuning zone: 1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Set the SPAN SELECTOR switch to "50/9" for 9 kHz AM interval (50 kHz FM interval), and "100/10" for 10 kHz AM interval (100 kHz FM interval).
3
Whilst pressing down the button and the button, hold down the ON/STAND-BY button for at least 1 second.
Caution:
The operation explained above will erase all data stored in memory including clock and timer settings, and tuner and CD presets.
SPAN SELECTOR
FM/AM(kHz)
50/9
100/10
2
1,2
RESETTING THE MICROCOMPUTER
Reset the microcomputer under the following conditions:
To erase all of the stored memory contents (clock and timer settings, and tuner and CD presets). If the display is not correct. If the operation is not correct.
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Whilst pressing down the button and the button, hold down the ON/STAND-BY button for at least 1 second.
Caution:
The operation explained above will erase all data stored in memory including clock and timer settings, and tuner and CD presets.

– 7 –
CD-C831W
DISASSEMBLY
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 and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3.Takeoffnylon bands or wire holders where theyneedto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,besure to rearrange the leads where theywere
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
CD-C831W
1 Top Cabinet 1. Screw ..................... (A1) x4 7-1
2 Side Panel 1. Screw ..................... (B1) x6 7-1
(Left/right) 2. Hook....................... (B2) x2
3 CD Player Unit/ 1. Turn on the power supply, 7-2
CD Tray Cover open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook....................... (C1) x3
3. Hook....................... (C2) x2
4. Socket .................... (C3) x2
4 Back Board 1. Screw ..................... (D1) x6 7-2
5 Tuner PWB 1. Screw ..................... (E1) x3 8-1
2. Socket .................... (E2) x1
6 Main PWB 1. Screw ..................... (F1) x4 8-1
2. Socket .................... (F2) x4
3. Flat Wire................. (F3) x1
4. Tip Wire.................. (F4) x1
5. Flat Cable............... (F5) x1
7 Front Panel 1. Screw ..................... (G1) x1 8-1
2. Socket .................... (G2) x1
3. Hook....................... (G3) x2
8 Headphones PWB 1. Screw ..................... (H1) x1 8-2
2. Support Bracket ..... (H2) x1
9 Display PWB/ 1. Screw ..................... (J1) x12 8-2
Switch PWB 2. Hook....................... (J2) x2
3.Socket ..................... (J3) x1
10 Tape Mechanism 1. Open the cassette holder. 8-2
2. Screw...................... (K1) x5
11 Turntable 1. Screw ..................... (L1) x1 8-3
2. Cover ..................... (L2) x1
12 Disc Tray 1. Screw ..................... (M1) x2 8-3
2. Guide ..................... (M2) x2
13 CD Servo PWB 1. Screw ..................... (N1) x1 8-4
(Note 2) 2. Socket .................... (N2) x4
14 CD Changer 1. Screw ..................... (P1) x4 8-5
Mechanism
15 CD Mechanism 1. Screw ..................... (Q1) x1 8-5
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 7-3)
1. Turn fully the lock lever in the arrow direction through the
hole on the loading chassis bottom in this state.
After that, push forward the CD player base.
Note 2:
1.After removing the connectorforthe optical pickupfromthe
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
Figure 7-1
CD-C831W
Top Cabinet
(A1) x2
ø3x12mm
(A1) x2
ø3x12mm
(B2) x1
(B2) x1
Side Panel
(Left)
Side Panel
(Right)
(B1) x1
ø3x10mm
(B1) x1
ø3x10mm
(B1) x4
ø3x8mm
Back Board
(D1) x6
ø3x10mm
Back Board
Main PWB
CD Tray Cover
CD Player
Unit
(C1) x3
(C2) x1
(C3) x2
1
1
2
Pull
(C2) x1
LOCK
LEVER

CD-C831W
– 8 –
Figure 8-1
Figure 8-2
Figure 8-3
Be Careful when installing the CD changer mechanism.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
Figure 8-4
Figure 8-5
(G1) x1
ø3x10mm
(F1) x3
ø3x10mm
(E1) x1
ø3x10mm
(F1) x1
ø3x10mm
(E1) x2
ø3x10mm
(F4) x1
(G2) x1
Front Panel
Main PWB
Tuner PWB
(F2) x2
(F5) x1
(F3)x1
(F2) x2
(E2) x1
(G3) x1
(G3) x1
Front Panel
Display PWB
Switch PWB
Open
Cassette
Holder
Tape Mechanism
(J1)x2
ø3x10mm
(J1)x7
ø3x10mm
(J1)x3
ø3x10mm
(H1)x1
ø3x10mm (K1)x5
ø3x10mm
(H2)x1
Headphones
PWB
(J3)x1
(J2)x2
(M1) x1
ø3 x10mm
(M1) x1
ø3 x10mm
(L1) x1
ø3 x10mm
Turntable
Disc Tray
(L2) x1
(M2) x1
(M2) x1
CD Player Unit
Washer
(N1) x1
ø3 x10mm
(N2) x2
(N2) x2 CD Player Unit
CD Servo PWB
(P1) x4
ø3 x12mm
(Q1) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base

– 9 –
CD-C831W
CP-C831
1 Front Speaker 1. Front Panel ............ (A1) x1 9-1
2. Tip .......................... (A2) x2
3. Screw ..................... (A3) x6
STEP REMOVAL PROCEDURE FIGURE
Figure 9-1
Note:
The Surround speakers can be easily disassembled.
Therefore the disassembling method is not described.
For details refer to the disassembling drawing in the Parts
Guide.
How to remove the pickup (See Fig. 9-3)
1.Removethescrews(B1)x2pcs.,toremove the shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 9-3
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Performsteps1,2,3,11,12,13,14and15ofthedisassembly
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 9-2)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 9-2
Note
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
(A1) x2
ø2.6 x5mm
Loading Motor
Motor
PWB
(B1) x2
ø2.6 x6mm
Shaft
(B2) x1
Stop Washer
(B3) x1
Gear
(B4) x1
CD Mechanism
Pickup
Screw Driver
Woofer
(A3)x4
ø4x12mm
(A3)x2
ø3x10mm (A2)x2
Front Panel
(A1)x1
Tweeter

CD-C831W
– 10 –
MECHANISM SECTION ADJUSTMENT
Figure 10 ADJUSTMENT POINTS
•Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
•Torque Check
Torque Meter Specified Value
Tape 1 Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 100 g.cm
Fast forward: TW-2231 — 50 to 100 g.cm
Rewind: TW-2231 — 50 to 100 g.cm
•Tape Speed
Test Tape Adjusting
Point Specified
Value Instrument
Connection
Normal MTT-111 VRM1 3,000 ±Speaker
speed 30 Hz terminal
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency Frequency
Display Setting/ Adjusting
Parts
Instrument
Connection
IF 450 kHz 1,602 kHz T351 *1
AM Band — 531 kHz (fL): T306 *2
Coverage 1.1 ±0.1 V
AM 990 kHz 990 kHz (fH): T302 *1
Tracking
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
• FM
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually
Adjusting
Parts Instrument Connection
Frequency
Display
Frequency
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz 98.00 MHz VR351 Input: Antenna
(25 dBµV) Output: Speaker
Terminal
VRM1
TAPE
SPEED
FAS
SW
SWM1
TAPE MECHANISM PWB
CD ERROR CODE DESCRIPTION
When a malfunction occurs during CD operation, an error
code will be displayed to identify the function in CD operation
which failed.
Error State Code
0001 Cannot detect pickup-in SW
0101 Tray close operation error
0105 Tray close operation error
0201 Tray open operation error
0203 Tray open operation error
0304 Disc skip operation error
0305 Disc skip operation error
0307 Disc skip operation error
TP302
R357
T351 VR351
FM MUTE
LEVEL
R336 TP301
FE301
IC303
T306 T302
SO301
ANTENNA
TERMINAL
TUNER PWB
AM IF
AM BAND
COVERAGE AM
TRACKING

– 11 –
CD-C831W
TEST MODE
Figure 11-2 Figure 11-3
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
• Automatic adjustment item
1. Focus offset (Fig. 11-2)
2. Tracking offset (Fig. 11-3)
3. E/F balance (tracking error balance) (Fig. 11-4)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is changed. Therefore,
each disc is played back using the optimal settings.
CD SECTION Figure 11-1
Note:
Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 11-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the ( ) or ( ) key.
<MEMORY>
LASER ON
<PLAY> key input Press <STOP> key. Stop
TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
<MEMORY>
Tracking on the spot.
SERVO ON PLAY STOP
Figure 11-4
IL is not performed.
<STOP>
1 2 3
2
0.1s
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
1
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
2
1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
2
1
TO
TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST

CD-C831W
– 12 –
SW715 VIDEO ON—OFF
SW716 TAPE ON—OFF
SW717 CD ON—OFF
SW721 DISPLAY MODE ON—OFF
SW722 FF ON—OFF
SW723 TUNING UP ON—OFF
SW724 TUNING DOWN ON—OFF
SW725 PLAY ON—OFF
SW726 VOLUME DOWN ON—OFF
SW727 VOLUME UP ON—OFF
SW728 X-BASS/DEMO ON—OFF
SW729 EQUALIZER ON—OFF
SW730 DIMMER ON—OFF
SW801 VOLTAGE SELECTOR 110/127/220/
230–240V
SWM 3 FOOL PROOF ON—OFF
SWM 4 F.A.S. ON—OFF
SWM 5 CAM ON—OFF
SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW601 SPAN SELECTOR 100/10 –50/9
SW701 ON/STAND-BY ON—OFF
SW703 CLOCK ON—OFF
SW704 TIMER/SLEEP ON—OFF
SW705 DISC 1 ON—OFF
SW706 DISC 2 ON—OFF
SW707 DISC 3 ON—OFF
SW708 DISC SKIP ON—OFF
SW709 OPEN/CLOSE ON—OFF
SW710 REV ON—OFF
SW711 REC PAUSE ON—OFF
SW712 MEMORY/SET ON—OFF
SW713 STOP ON—OFF
SW714 TUNER/BAND ON—OFF
•The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
1. In the tuner section,
( ) indicates AM
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
•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.
NOTES ON SCHEMATIC DIAGRAM
•Resistor:
To differentiate the units of resistors, such 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
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
•Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolyticcapacitor,theexpression“capacitance/withstand
voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
•Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
Figure 12 TYPES OF TRANSISTOR AND LED
(1) (2) (3)
(S) (G) (D)
E C B
FRONT
VIEW
2SA1015 GR
2SA1318
2SC2389 SE
2SC3331
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR
KTA1271 Y
KTA1273 Y
KTA1274 Y
KTD2058 Y
KTC3199 GR
KTC3203 Y
L1154GT4
SLI342YCB
SLI342DCB
SLI342UCB
SLI342UCB
SLI342YCJ
2SA1318 SVC348S
FRONT VIEW
FRONT
VIEW
B C E
(D)(G)(S)
(3) (2) (1)
1 2 3

– 13 –
CD-C831W
Figure 13 BLOCK DIAGRAM (1/3)
27
123418
67
18244020
45
15
23 16 26 27
7
2
25
20
29
35
14
21
22
3839284142 37 36
PU-IN SW
XL1
XIN
LD0
FIN2 JP–
CV+
SLC
SL1
FIN1 E F
FD
SPO
NC
SLD
SL–
SL+
DRF
CL
DAT
CE
VCC1
6
+5V
PICKUP IN
SW4
FOCUS COIL
TRACKING COIL
M1
SPINDLE
MOTOR
M
M
M2
SLED
MOTOR
PICKUP UNIT
9
24 8
IC2
LC78622NE
SERVO/SIGNAL
CONTROL
+B1
IC3
M63001FP
FOCUS/
TRACKING/
SPIN/SLED
DRIVER
IC1
LA9241M
SERVO AMP.
RES. CQCK. COIN SQOUT. RWC. WRQ
~
~
~
CL, DAT, SELIAL CONTROL/CE
Q51
SL+. SL–. DRF
987654321
GND (D) MECHA UP GND (D) DISK NO. OPEN/CLOSE GND (D) M– M+ GND (M)
987654321
CNP10
M
+5V
+B1
62
64
45
36
23
43
37 38 39 40
33 38 39 46 24 25
10
123456
10
26
58
53
~
64
62
51
10 12
11
22
20
32 40 43 44
53
52
51
54
31
30
29
23
27
16
15
41
44
Q1
Q52
+4.3V
Q81
+7.3V (B1)
REGULATOR
TO MAIN SECTION
(TO IC601)
XOUT
EFMO EFMIN CLV+ JP–
CONT2 CONT1
LCHO
LVSS
RVSS
RCHO
VVDD
VDD
LVDD
RVDD
XVDD
SW1 OPEN/CLOSE
SW2 MECHA UP SW3 DISC No.
M3 LOADING
SOLM1
TO MAIN
SECTION
CNS10
+B5
~~
CNP11

CD-C831W
– 14 –
Figure 14 BLOCK DIAGRAM (2/3)
X351 456kHz
FM DET CF351
+B4
+B4
+B4
+B4
VOLTAGE
REGURATER
+5V
FM +B
VT
T306
T302
CF302
DO
CE CL
DI
FE301
FM FRONT END
Q360
MPX
VCO
CUT
RL
Q354
Q353
PHASE
Q361
MPX
MPX
IN
FM/AM
OUT
IF IN
IC303
LA1832
FM/AM IF MPX. IF
OUT
SD
FM MONO/ST MONO/ST
AM RF IN
AFC
IN
OUT
VR351
FM MUTE LEVEL AM OSC
REG INOUT VCC
FM IF IN
12 3 4589
17 19 20 18 16
15
14
12
11
10
67 13
21
22
23
24
FM IF
FM
X352
4.5MHz
OSC
STEREO
IC302
LC72131
PLL (TUNER)
INAM
FM IN
FMOSC
T351
AM IF
GND
OSC
F OUT
AM OSC
VOLTAGE
REGULATOR
AM ANT
AM RF
CF352
TUNER MUTE
MUTING
SO301
ANTENNA
TERMINAL
2
8
67 3 4
1
5
4
3 6
521
17
1213
10
1116
15
2220
7
1
Q371
1
1
6 7
4
8
3
3
5
FM
75 ohms
GND
AM
1
24
2
23
3
4
4
21
5
20
6 7
17
8
9
16
10
14
12
13
18
H/N
T1/T2
R-CH
L-CH
L-CH
R-CH
P.B
REC
TAPE 2
TAPE 1
L NF
L(T1)
R(T1)
L(T2)
R(T2)
R NF
L
R
POP REDUCE
L REC
R REC
L
R REC
P.B.
REC
ALC
NOR/
HIGH T1/T2
REF L NF
R NF
PB HEAD
REC PB HEAD
SWITCHING
Q103~Q106
AC BIAS
IC101
AN7345K
PLAYBACK AND RECORD
/PLAYBACK AMP.
PB
ERASE
HEAD
SWITCHING BAIS
Q126
Q124
L103
Q128
L104
Q111
Q110
Q109
Q107
Q108
SWITCHING SWITCHING
SWITCHING
+B4
1
2
3
CNS11
FROM CD SECTION
CNP11
SWM
3
FOOL PROO
F
SWM4
F.A.S
SOLM1
SOLENOID
SWM5
CAM
5
16
4
17
3
18
2
19 1 20 9
IC601
M62439SP
AUDIO PROCESS
O
L
R
L
RL
R
L
R
L
R
TUNER
AUX
TAPE
CD
+B7
–B1+B5
MUTING
Q121
Q122
Q113
Q114
F
M
S
W
BIAS
OCS
15 19
11 10
JK601
VIDEO/AUX
KIA
7
R
E
4
8
–B1+B5
IC563
KIA4558P
OPE AMP.
IC562
KIA4558P
OPE AMP.

– 15 –
CD-C831W
Figure 15 BLOCK DIAGRAM (3/3)
Q704
D701
~D704
ZD802
RL801
110V
230-240V
127V
220V
SWM3
L
PROOF
SWM4
F.A.S
SOLM1
O
LENOID
SWM5
CAM 1 2 3 4 15 2516 26 28 373839
FL701
DISPLAY
9 8 7 6 5 4 3 2 1
IC701
IX0281AW OR IX0310AW
SYSTEM CONTROL
MICROCOMPUTER
1
9
SP
C
ESSOR L
R
VDD
UNSWITCH
+B7
MEMORY
BACK UP
VDD
XL701
4.19MHz
+B5
+B7
KEY
SW701~SW717
SW721~SW730
Q908
+B5
M
Q960
+B5
RL901
TO CD
SECTION
M901
FAN MOTOR
JK970
HEADPHONES
SO901
SPEAKER
TERMINAL
T.F
T801
POWER
TRANSFORMER
AC POWER
SUPPLY CORD
AC 110/127/220/230-240V
50/60Hz
T802
POWER
TRANSFORMER
Q803
Q802
+B6
+B7 UNSWITCH
3
IC704
1
7 2
BAIS
T1/T2
REC
MUTING
Q121
Q122
+B4
FM/AM
SWITCHING
D801
D803~D806
Q801 D807
~D809
2 3
1
+B7
RX701
Q705
Q706
Q707
2
1 3
6
7 L-OUT
IC901
STK407040B
POWER AMP.
–B +B R-OUT
13
8
Q601
Q602
ZD801
Q603
Q604
+B1
–B1
+B4
+B5
+B2
+7.3V
+12V(ANALOG)
+12V(MOTOR)
+5.6V
+5V
Q821
Q822
Q824
Q823
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
Q702
Q703
AVDD
~~~
14
10
15
101112131415161718192021222324
25
2627
282930
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
7170696867666564636261 80797877
767574
737260595857
56
5554
535251
VDD
PHM1
D810~D813
FRONT
FRONT
SPEAKER
SURROUND
SPEAKER
F802
T4A L 250V
F803
T4A L 250V
F832
T500mA L 250V
F805
T2A L 250V
29 36
~
M
MM1
TAPE MOTOR
SW601
SPAN
SELECTOR
+B7
+B7
–15V
KIA7042AP
RESET
SW801
VOLTAGE
SELECTOR

CD-C831W
– 16 –
Figure 16 SCHEMATIC DIAGRAM (1/9)
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.
R602 1.
R604 1.
R606 1.
R608 1.
R605 1.5K
R601 1.5K
C603
4.7/50
R603 1.5K
C605
4.7/50
R607 1.5K
C601
4.7/50
C627
22/25 R625 22K
R639
47K
R615 3.9K
R101
1K
C108 0.001
Q108 2SC3331
R108 47K
R110 4.7K
R109 4.7K
R112
10K
R117
1K C113
330P
R114
10K
Q110
KRC104 M
Q111
KRC104 M
R111
10K
R102
1K
C111
330P
C153
100/16
R155
150
ZD601
MTZJ2.4B
C614 0
C612 0
R612
22K
R610
10K
C619
0.022 R623
10K
C617
10/50
IC601
M62439SP
AUDIO PROCESSOR
10 11
12
13
14
15
16
17
18
19
20
9
8
7
6
5
4
3
2
1
C613
0.22
C611 0.033
C615
0.22
R609
2.2K
R621
10K R613
10K
C621
0.1/50
R611
330
R115
4.7K
R104
2.2K
R106
3.3K
R105
3.3K
R103
2.2K
R113
10K
C109
0.047
Q109
2SA1318
Q106
2SC2389 SE
Q104
2SC2389 SE
Q105
2SC2389 SE
Q103
2SC2389 SE
C102
0.001
C101
0.001
C105
180P
C106
180P
CNP102 CNP101
R172
220K
R171
220K
C114
330P
R118
1K
C112
330P
Q107 2SC3331
R107 47K
C107 0.001
R619
2.2K
R620
2.2K
R616 3.9K
R622
10K
C622
0.1/50 R629
330(1/2W)
R635
330
R636
330
C629
22/25
R628 22K
R617
2.2K
R618
2.2K
R614
10K
C623
0.001
C624
0.001
Q602
2SC3331
Q601
2SC3331
C634
0.0047
C635
0.0047
R646 100K R645
100K
C626
0.001
C625
0.001
Q604
2SC3331
Q603
2SC3331
C115
47/25
C116
47/25
R135
8.2K
C127 0.022
C128 3.3/50
R137
C121
1/50
R123 3.9K
C119
560P
C117
0.033
R1
38
R132 33K
R120
56 C120
560P
R126
5.6K
R119
56
C118
0.033
R122
100K
R124 3.9K
C122
1/50
R125
5.6K
R121
100K
R131
33K
6
5
4321
C156 3.3/50
C154
C155 3.3/50
R173
5.6K
R169
680
Q113
2SC3331
R174
5.6K
R170
680
R175
1K
Q114
2SC3331
P18 1 - E
TO POWER SECTION
BI601
P23 12 - C
TO CD SERVO PWB
CNP11
1
2
3
2
TAPE1_R
TAPE1_L
A_GND
A_GND
M_GND
ERASE
TAPE2_R2
TAPE2_R1
TAPE2_L1
9.3V
8.6V
9.3V
0V 3.4V
3.4V
0V
0V
0V
0V
0.7V
0V 0.7V
0V
0V
0V
0.7V
0V
0V
0V
0.7V
0V
0V
0V
CNS11
+12V
+7V
CD_GND
L-CH
A_GND
R-CH
–
–
+
Hich=T1
+
112K
112K
+B
+B
+B
+B +B
+B
CD_+B
CD_GND
L
A_GND
A_12V
A_GND
M_GND
3
2 1
1 3
2
CNS101 R-CH
L-CH
PLAYBACK HEAD
TAPE1
CNS102
RECORD/
PLAYBACK HEAD
TAPE2
R-CH
L-CH
ERASE
HEAD
FM SIGNAL RECORD SIGNAL
1
6
4
5
3
2 1
6
4
5
3
2
7
6
5
4
3
1
2
1
3
2
3
2
1
7
6
5
4
3
1
2
R134 68K
R
12
13
10
14
TAPE2_L2
PLAYBACK SIGNAL
1920
21
222324
R136 8.2K
Q109 ~ Q111: SWITCHING
Q103 ~ Q108: SWITCHING

– 17 –
CD-C831W
Figure 17 SCHEMATIC DIAGRAM (2/9)
78 9 10 11 12
CNP303
R640 47K
R642
47K
6
02 1.5K C604
4.7/50
6
04 1.5K C606
4.7/50
6
06 1.5K
608 1.5K C602
4.7/50
C654
4.7/50
C652
1/50
C651
3.3/50
C653 4.7/50
C650 3.3/50
C620
10/50
ZD602
MTZJ2.4B
R641
47K
R653
220K
R655
5.6K
R651
680
R157
220K
L103
100µH
Q121
2SC3331
R153
10K
R630 330
(1/2W)
C628
0.22
C
614 0.22
C
612 0.033
R612
22K
0
C616
10P
R626 2.2K
R624
330
C618
0.022
C631
390P
C632
390P
R632
22K
R633
22K
R634
22K
R652 220K
R650 680
R654 5.6K
R656 1K
L104
330µH
R168
12
R162
47K
R164 4.7K
C150
0.0039
R167
100K
R166
47K
R160
150
R631
22K
R638
220K
R637
220K
JK601
9
8
7
6
5
4
3
2
1
CNP701
R158
220
Q124
2SA1015 GR
Q128
KTC3203 Y
C151
0.027
(ML)
C152
47/25
Q126
KRC104 M
IC101
AN7345K
PLAYBACK AND
RECORD/PLAYBACK AMP.
R141 56
R135
8.2K
C129 470P
R139 560
C141
1/50
C128 3.3/50
C131 0.001
C146 220/10
R146 10K
C135 0.068
C139 0.0033
R145
10K
R137 6.8K
C145 22/25
C140 0.0033
C130 470P
C142 1/50
R140 560
C132 0.001
R138 6.8K
C134
22/25
C136 0.068 R142
56
C133
22/25
9
8
7
6
Q122
2SC3331
C154 47/16
R156
220K
C630
0.022
D601
1SS133
D602
1SS133
CNS701
P20 1 - D
TO DISPLAY PWB
P18 1 - E
TO POWER SECTION
7
6
8
4
5
MAIN PWB-A1(1/2)
SP_DET
SP_RLY
+5V
VF2
–VF
VF1
–15V
M_12V
REC_R
+5V
–15V
SPA_SIG
A_GND
M_12V
D_GND
REC/PLAY
T_BIAS
T_T1 T2
S_MUTE
HI_CUT
SP_RLY
SP_DET
SPN_P
VF2
-VP
VF1
DO
CLK
CE
DI
0V
0.7V 0.7V
0V
0V
11.6V
0V
0V
0V
0V
VIDEO
IN
0V
Vcc
ALC GND
ALC
RIPPLE
Nor/CrO2
+
+
–
–
Hich=CHROME
56K
56K
0V
+B
–B
–B
+B
DI
A_12V
D_GND
SW601
SPAN SELECTOR
FM/AM(KHz)
CLK
CE
DO
TUN_L
A_GND
TUN_R
–B
+B
+B
–B
+B
+B
+B
+B
+B –B
1
2
P24 6 - A
TO TUNER PWB
A
L CD SIGNAL
L-CH
R-CH
R154
10K
REC_L
R134
68K
11.7V
0V
11.6V
3
17
15
16
10
9
8
7
6
5
4
3
2
1
11
12
13
14
15
16
17
18
19
20
21
22
10 11 12
17
18
1
916 15 14 13
R136 8.2K
MUTING
MUTING
SWITCHING
BIAS
BIAS OSC
CNS303
Q650
2SC3331
Q651
2SC3331
50/9 100/10

CD-C831W
– 18 –
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.
Figure 18 SCHEMATIC DIAGRAM (3/9)
F832
T500mA
L 250V
D821
1SS133
D820
1SS133
C909
2200/50
R830
820 (3W)
C910
2200/50
C918
47/50
D904
1SS133
D903
1SS133 D906
1SS133
Q907
2SC3331
Q906 2SC3331
R928 1K
R930
10K
Q904 2SC3331
R93
56K
C938
47/50
R925
0.1(1W)
D833
1SS133
D832
1SS133
C828
0.1
(ML)
C827
0.1
(ML)
C833
0.1
(ML)
Q822
KIA7806P
31
Q821
AN78L05
1
Q824
KIA7812P
3 1
R827
22K
C826
47/25
C829
3300/25
R825
33
R832
22K
C825
22/25
C824 0.047(ML)
IC901
STK407-040B
POWER AMP.
Q823
KTD2058 Y
C904
10/50
R912
100(1/4W)
C907
10/50
R916
1K
R917
56K
C916
15P
C915
120P
C917
47/50
R918
680
R921
22K
R922
680
R923
56K
C924
15P
R924
1K
C923
47P
D803
1N4004S D
1
D
1
D804
1N4004S
123456789
10 11 12 13 14 15
Q905
2SC3331
R931
10K
R929
1K
C921
0.022
R939
56K
C920
0.022
R926
0.1 (1W)
R803
47K
C802
100/35
ZD801
MTZJ6.2A
C803
R802
2
C830
47/25
C821
0.047(ML)
R837
10K C832
0.1(ML)
C831
47/25
2
C911
100/50
C912
100/50
R913
100 (1/4W)
Fusible
R966
22K
C905
220P C902
220P
R903
100K R901
100K
C903
1/50
C901
1/50
R904
68K R902
68K
R905
1K
R907
1K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
2
3
R801
12K
NC
NC
A_GND
D_GND
M_12V
–15V
SP_RLY
A_GND
L
R
SP_DET
CD_GND
M_GND
A_12V
+5V
–VF
VF2
VF1
CD_+B
(2Ch)
+
+
–
–
–Vcc –Vcc +Vcc
Ch1
Ch2
Ch1 Ch2 Out Out
+B1
+B2
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
–B
–B
CNS806
P21 12 - E
TO DISPLAY PWB
MAIN PWB-A1(2/2)
FM SIGNAL
P16 2 - D, P17 12 - G
TO MAIN SECTION
D
T
Fusible
R
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR

– 19 –
CD-C831W
Figure 19 SCHEMATIC DIAGRAM (4/9)
78 9 10 11 12
L970
2.2mH C971
100P
C970
100P
FW801
C956
100/50
C954
100/50
C953
0.001 C952 0.001
C951
0.001
C950
0.001
Q908
KRC107 M
C937
0.1
(ML)
C936
0.1
(ML)
D802 1SS133
JK970
HEADPHONES
CNP802
R946
330(1/2W)
R937
4.7
R934
4.7
R961
15K
D960
1SS133
C960
10/50
R963
1K
RL901
R936
56K
3
8
5
0
WTM801
D810
1N4004S D813
1N4004S
D812
1N4004S
D811
1N4004S
C809
0.047(ML)
C813
220/50
C806
0.22 C805
0.22
8
03
4
SD806
1N4004S
D805
1N4004S
0
4
04S
ZD802
MTZJ30B
C804
47/50
Q801
KTA1274 Y
R806
2.2K
D807 1N4004S
D808
1N4004S
D809
1N4004S
C812 220/50
C811 220/50
RL801
SW801
VOLTAGE SELCTOR
110V
230-240V
127V
220V
C961
47/50
CNP804
R960
150
R967
150
15
D907
1SS133
R938
56K
R939
56K
R949
330(1/2W)
R941
4.7K
R942
4.7K
R952
68
C962
270P
D961
1SS133
D962
1SS133
R951
68
Q960
2SC3331
–
–
+
+
–
–
+
+
ZD801
MTZJ6.2A
C803
47/50
R802 10
1
2
CNP801
T802
C801
0.1
M
M901
FAN MOTOR
1
23
4
3
45
5
T801
POWER TRANSFORMER
C810
470/35
Q803
AN78L05
1
D816
1SS133
2
3
C814
10/16
R808
220
C815
1000/6.3 D815
1SS133
D818
1SS133
Q802
KRC107 M
CNP806
R962
68K
SO801
AC
INPUT
F802
T4A L 250V
F803
T4A L 250V
1
2
3
16
OHMS/CH
6
OHMS/CH
+B
+B
+B
+B
+B
CNS804
1
5
SURROUND SPEAKER L-CH
SURROUND SPEAKER R-CH
SURROUND SPEAKER L-CH GND
SURROUND SPEAKER R-CH GND
FRONT SPEAKER L-CH
FRONT SPEAKER R-CH
FRONT SPEAKER L-CH GND
FRONT SPEAKER R-CH GND
CNS801
T.F
F805
T2A L 250V
–B
POWER TRANSFORMER
3
2 1
D_GND
UN_SW_5V
AC _RLY_CON
+5V
+B
CNS806
P
21 12 -
E
TO DISPLAY PWB
+B
AC POWER
SUPPLY CORD
AC 110/127/220
230-240V
50/60Hz
POWER PWB-A2
HEADPHONES PWB-A5
8
7
6
5
4
3
2
1
8
7
6
5
4
2
1
3
4
3
2
1
5
4
3
2
1
2
11
2
D801
TS6B04GM
CNS802
C808
0.22 C807
0.22
SO901
SPEAKER
TERMINAL
VOLTAGE
REGULATOR
C935
0.1
(ML)
C934
0.1
(ML)
TO TAPE MECHANISM
CHASSIS

CD-C831W
– 20 –
Figure 20 SCHEMATIC DIAGRAM (5/9)
A
B
C
D
E
F
G
H
123456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.
M
D701
D702
D703
D704
D701~704: 1SS133
C720
47/50
R707
1K
R708
1K
Q707
2SC3331
R749 10K
R748
10K
R747
10K
R709
1K
R712 22K
R713 1K
R715 1K
IC701
IX0281AW O
R
IX0310AW
SYSTEM CONT
R
MICROCOMPU
T
R737 1K
R736 1K
R734 2.2K
R733 2.2K
R732 1K
R731 1K
R730 1K
C568
2.2/50
Q703
KTA1271 Y
D716
1SS133
R759
10K
D554
1SS133
C566
2.2/50
D555
1SS133
D556
1SS133
LED722
SLI342UCJ
R735 1.8K
R
1
R
1
R
1
R753
10K
R754
10K
R752
10K
R714 1K
R701 1K
R702 1K
R703 1K
R705
1K
R741 1K
R740 1K
R739 10K
R738 1K
C705
47/25
Q702
KTA1273 Y
R760
10K
ZD551
MTZJ6.2C
C569 0.022
C563 0.022
R574
330
R575
330
R758
1.2K
R727 10K
R724 10K
R726 10K
FL701
FL DISPLAY
R723
100K
R722
100K
R721
100K
R720
10K
R719
10K
R717
10K
C557
270P
R558
68K
C553
0.0027
R562
390K
R556
33K
IC563
OPE AMP.
KIA4558P
R551
10K
C562
0.022
R572
2.2M
R555
56K C555
0.0068
IC562
KIA4558P
OPE AMP.
R561
15K
C561
0.022
R560
470K
C551
270P
R567 270K
C556
0.0068
R573
560K
R564 390K
C559
0.0027
R553
12K
R568
220K
R570
220K
D551
1SS133
R566 2.2M
R580 100K
R579
100K
C567
2.2/50
R578
100K
CNS701
R716
33
R706
1K
Q706
2SC3331
Q705
2SC3331
1 2 3 4 5 6 7 8 9
DISPLAY PWB-A3
CNP701
TO MAIN PWB
C702
1/50
BI701
4
1
8
7
2
3
5
6
4
1
8
2
3
5
6 7
NC DISTOUT
SPN_P
SP_DET
SPRLY
DIST0
DIST0 L:DEMOSTAR
T
DIST0 H:ECOSTART
REC/PLAY
AC RLY-CON
5V
–15V
SPA SIG
A_GND
TUN_SM
12V M
D_GND
REC/PLAY
T_BIAS
T_T1 T2
S.MUTE
HI_CUT
SP_RLY
SP_DET
SPN_P
VLOAD (–VP)
VF2
VF1
DO
CLK
CE
DI
12V
12V
12V
12V
0V
0V
U/D SW
VD
D
G7 G8 G9
P1
P10 P11
P2 P3 P4 P5 P6 P7 P8
VLOAD
P16
HI-CUT
S MUTE
T_T1T2
T-BIAS
FPA TIFAS CAM SW VDD T_MOT
T_SOL
TIMER LED DNO SW
VSS REMOCON SYS STOP O/C SW
T2
R
P15
P14
P13
P12
P21/DIST3
P22/DIST4
P20/DIST2
P19/DIST1
P18
P17
P11 P10
P9
8
7
65
4
123
GND
CAM SW T1FAS FPA
MOTOR
+12V
T2 RUN SOLENOID
F F F
G11 G10 P01 P02 P03 P04 G07 G08 G09
P05 P06 P07 P08 P09 P10 P11
P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 P22
SPEANA3
SPEANA2
2
–
MM1
TAPE MOTOR
2+
4
13
FWM1
SWM3
FOOPL PROOF
CNPM2
SWM4
F.A.S
SOLM1
SOLENOID
SWM5
CAM FWM2
CNPM1
CNSM1
PHM1
RUN PALS
SENSOR
+B
–B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
SPEANA1
–B
–B
–B
+B
MOTOR
T2 RUN
+12V
FPA
CAM SW
T1 RUN
SOLENOID
GND
TAPE MECHANISM
PWB-F
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
10
11
12
13
14
15
16
17
18
19
20
21
22
10
11
12
10
11
12
3738394041424344454647484950
9493929190898887868584838281
80
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
52
51
1
30
+B
+B
+B
+B
+B
P17 12 - F