SONY CDPC672A Service Manual

CD-PC672

SERVICE MANUAL

No. S4915CDPC672/

CD-PC672

CD-PC672 mini component system consisting of CD-PC672 (main
unit), CP-C672 (front speakers), CP-SW672 (sub woofer),
GBOXS0022AWM1 (center speaker) and GBOXS0023AWM1 (rear
speaker).

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.

Manufactured under license from Dolby Laboratories Licens­ing Corporation.
DOLBY, the double-D symbol and "PRO LOGIC" are
trademarks of Dolby Laboratories Licensing Corporation.

CONTENTS

IMPORTANT SERVICE NOTES (For U.S.A. Only) ........................................................................................................... 2

SPECIFICATIONS ..............................................................................................................................................................3

NAMES OF PARTS ........................................................................................................................................................... 4

OPERATION MANUAL ...................................................................................................................................................... 7

QUICK GUIDE ................................................................................................................................................................... 8

DISASSEMBLY.................................................................................................................................................................. 9

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12

ADJUSTMENT ................................................................................................................................................................. 13

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 16

BLOCK DIAGRAM ........................................................................................................................................................... 17

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................20

VOLTAGE ........................................................................................................................................................................ 40

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 41

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 42

FUNCTION TABLE OF IC................................................................................................................................................ 47

FL DISPLAY......................................................................................................................................................................54

REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For U.S.A. Only)

Page

SHARP CORPORATION

– 1 –

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

CD-PC672

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.

IMPORTANT SERVICE NOTES (For U.S.A. Only)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)
Before returning the audio product to the user, perform the
following safety checks.

1. Inspect all lead dress to make certain that leads are not
pinched or that hardware is not lodged between the chassis
and other metal parts in the audio product.

2. Inspect all protective devices such as insulating materials,

cabinet, terminal board, adjustment and compartment covers
or shields, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage

current in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor

paralleled by a 0.15µF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.

* Use a VTVM or VOM with 1000 ohm per volt, or higher,

sensitivity to measure the AC voltage drop across the
resistor (See diagram).

* Connect the resistor connection to all exposed metal parts

having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.

VTVM

AC SCALE

1.5k ohms
10W

0.15 µ F

TO EXPOSED
METAL PARTS

All check must be repeated with the AC line cord plug connection
reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.

TEST PROBE

CONNECT TO
KNOWN EARTH
GROUND

– 2 –

SPECIFICATIONS

CD-PC672

General

Power source: AC 120 V, 60 Hz
Power consumption: Stand-by; 0.3 W

Power on; 150 W

Dimensions: Width; 10-5/8" (270 mm)

Height; 11-13/16" (300 mm)
Depth; 14-1/4" (362 mm)

Weight: 17.7 lbs. (8.1 kg)

Amplifier section

Output power: Front speakers; 40 W minimum
(Except for Canada) RMS into 6 ohms from 60 Hz to

20 kHz with no more than 10 %
total harmonic distortion.

Output power: Front speakers;
(For Canada) RMS; 80 W (40 W + 40 W)

(10 % T.H.D.)
Center speaker;
RMS; 20 W (10 % T.H.D.)
Rear speaker;
RMS; 20 W (total)
(10 % T.H.D.)
Sub woofer;
RMS; 40 W
(80 Hz 10 % T.H.D.)

Output terminals: Front speakers; 6 ohms

Center speaker; 4 ohms
Rear speaker; 8 ohms
Sub woofer; 6 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)

Input terminal: Video/Auxiliary (audio signal);

× 2; 500 mV/47 kohms

Tuner section

Frequency range: FM; 87.5 - 108 MHz

AM; 530 - 1,720 kHz

Cassette deck section

Frequency response: 50 - 14,000 Hz (Normal tape)
Signal/noise ratio: 55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/

playback)

Wow and flutter: 0.15 % (WRMS)

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)

CD-PC672

Front speaker section

CP-C672

Type: 2-way 5-1/4" (13 cm) woofer

and 2" (5 cm) tweeter type

Maximum input power: 80 W
Rated input power: 40 W
Impedance: 6 ohms
Dimensions: Width; 7-7/8" (200 mm)

Height; 11-13/16" (300 mm)
Depth; 9-7/16" (240 mm)

Weight: 6.3 lbs. (2.9 kg)/each

Center speaker section

GBOXS0022AWM1

Type: 4" (10 cm) full-range speaker
Maximum input power: 40 W
Rated input power: 20 W
Impedance: 4 ohms
Dimensions: Width; 10-1/4" (260 mm)

Height; 5-1/2" (140 mm)
Depth; 6-1/8" (155 mm)

Weight: 2.0 lbs. (0.9 kg)/each

Rear speaker section

GBOXS0023AWM1

Type: 4" (10 cm) full-range speaker
Maximum input power: 20 W
Rated input power: 10 W
Impedance: 8 ohms
Dimensions: Width; 6-3/4" (170 mm)

Height; 3-1/2" (88 mm)
Depth; 6-3/4" (170 mm)

Weight: 1.0 lbs. (0.5 kg)/each

Sub woofer section

CP-SW672

Type: 5-1/4" (13 cm) full-range

speaker

Maximum input power: 80 W
Rated input power: 40 W
Impedance: 6 ohms
Dimensions: Width; 7-7/8" (200 mm)

Height; 11-13/16" (300 mm)
Depth; 11-5/8" (295 mm)

Weight: 7.5 lbs. (3.4 kg)/each

Specifications for this model are subject to change without
prior notice.

– 3 –

1

3

4

2

5

6
7

8

9
10

11

12

13

16
17

14

15

18

19 20 213522

25

27

29

26

30

37

31
32

33

34 36

38

39

23

24

28

41

40

CD-PC672

NAMES OF PARTS

CD-PC672

■ Front panel

11. Disc Number Selector Buttons

12. Disc Tray

13. Multi Indicator

14. Disc Skip Button

15. Open/Close Button

16. Extra Bass Indicator

17. FM Stereo Mode Indicator

18. FM Stereo Indicator

19. (CD) Repeat Indicator

10. (CD) Play Indicator

11. (CD) Pause Indicator

12. Spectrum Analyzer/Volume Level Indicator

13. (TAPE 2) Record Indicator

14. (CD) Disc Number Indicators

15. (CD/TUNER) Memory Indicator

16. Timer Play Indicator

17. Timer Record Indicator

18. Sleep Indicator

19. (TAPE 2) Record Pause Button

20. (CD) Track Down/Review Button

3 (TUNER) Preset Down Button
3 (TAPE 2) Rewind Button

21. (CD) Track Up/Cue Button

3 (TUNER) Preset Up Button
3 (TAPE 2) Fast Forward Button

22. Bypass Button

23. Normal Button

24. Timer Set Indicator

25. Timer/Sleep Button

26. Clock Button

27. Power Button

28. Headphone Socket

29. Equalizer Mode Selector Button

30. Dimmer Button

31. Phantom Button

32. Extra Bass/Demo Mode Button

33. Volume Control

34. Function Selector Buttons

35. Memory/Set Button

36. (CD/TAPE) Stop Button

37. (TAPE) Play Button

3 (CD) Play/Repeat Button

38. Tuning and Time Up/Down Buttons

39. Sub Woofer Volume Control

40. (TAPE 1) Cassette Compartment

41. (TAPE 2) Cassette Compartment

– 4 –

3

2

1

4

5

67

8

1
2

3

4

9
10

11

5

6

7

8

■ Rear panel

11.

CD Digital Output Socket

12.

AC Power Lead

13.

FM/AM Loop Aerial Socket

14.

Video/Auxiliary (Audio Signal) Input Sockets

15.

Rear Speaker Terminals

16.

Centre Speaker Terminals

17.

Front Speaker Terminals

18.

Sub Woofer Terminals

CD-PC672

CP-C672

■ Front speakers

11.

Tweeter

12.

Woofer

13.

Bass Reflex Duct

14.

Speaker Wire

GBOXS0022AWM1

■ Centre speaker

15.

Full-Range Speaker

16.

Speaker Wire

GBOXS0023AWM1

■ Rear speaker

17.

Full-Range Speaker

18.

Speaker Wire

CP-SW672

■ Sub woofer

19.

Woofer

10.

Bass Reflex Duct

11.

Speaker Wire

– 5 –

CD-PC672

CD-PC672

■ Remote control

11.

Remote Control Transmitter LED

12.

Surround Level Buttons

13.

Centre Level Buttons

14.

Dolby Pro Logic Button

15.

Centre Mode Button

16.

Test Tone Button

17.

Balance Control Buttons

● Tuner control section

18.

Preset Up/Down Buttons

● CD control section

19.

Memory Button

10.

Pause Button

11.

Stop Button

12.

Play/Repeat Button

13.

Clear Button

14.

Track Down/Review Button

15.

Random Button

16.

Track Up/Cue Button

17.

Disc Skip Button

2

3

4

5
6

7

13

14
18

1

109

2419202221

8

11 12

15

16

17

23

● Tape control section

18.

(TAPE 1) Play Button

19.

(TAPE 1/2) Stop Button

20.

(TAPE 2) Record Pause Button

21.

(TAPE 2) Rewind Button

22.

(TAPE 2) Play Button

23.

(TAPE 2) Fast Forward Button

24.

Equalizer Mode Button

25.

Function Selector Buttons

26.

Power Button

27.

Extra Bass Button

28.

Volume Up/Down Buttons

25

26

27

28

– 6 –

OPERATION MANUAL

SETTING THE CLOCK

1

Press the POWER 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.

"AM 12:00" → The 12-hour display will appear.

(AM 12:00 - PM 11:59)

"AM 0:00 " → The 12-hou r display will appear.

(AM 0:00 - PM 11:59)

"0:00" → T he 24-hour d isplay wil l appear.

(0:00 - 23:59)

● Note that this can only be set when the unit is first installed

or it has been reset (see page 18).

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.)

Note:

● In the event of a power failure or when the AC power cord is

disconnected, the clock display will go out.

When the AC power supply is restored, the clock display will

flash on and off to indicate the time when the power failure

occurred or when the AC power cord was disconnected.

CLOCK

POWER

MEMORY/

SET

TUNING/

TIME

( )

AM 12:00 AM 0:00 0:00

2

3

4

7

6

5

8

9

If this happens, follow the procedure below to change the clock

time.

To change the clock time:

①

Press the CLOCK button.

②

Within 5 seconds, press the MEMORY/SET button.

③

Perform steps 6 - 9 above.

To see the time display:

Press the CLOCK button.

● The time display will appear for about 5 seconds.

To change the time display mode:

①

Perform steps 1 - 2 in the section "RESETTING THE MICRO-

COMPUTER", on page 18.

②

Perform steps 1 - 9 above.

(Main unit operation)

In this example, the clock is set for the

12-hour (AM 12:00) system.

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 POWER button to enter the stand-by mode.

2

While pressing down the button and the

button, hold down the POWER 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.

2

1,2

CD-PC672

– 7 –

CD-PC672

MINI COMPONENT SYSTEM

Quick Guide/Guía rápida

CD-PC672

● Remote control x 1

●

Controlador remoto x 1

● 2 “AA” batteries

●

Dos pilas “AA”

Remote Sensor

Sensor remoto

2

Preparation for use /

Preparación para su uso

1

Check the supplied accessories /

Compruebe los accesorios suministrados

● FM/AM loop antenna x 1

●

Antena de cuadro de

FM/AM x 1

● Batteries are not included.

●

Las pilas no están incluidas.

8” - 20’ (0.2m - 6m)

0,2m - 6m

■ Speaker connection

■

Conexión de los altavoces

■ Antenna connection

■

Conexión de las antenas

Rear

speaker

(Right)

Altavoz

trasero

(Derecho)

Rear

speaker

(Left)

Altavoz

trasero

(Izquierdo)

Front

speaker

(Right)

Altavoz

delantero

(Derecho)

Front

speaker

(Left)

Altavoz

delantero

(Izquierdo)

● AM Loop Antenna

●

Antena de cuadro

de AM

● FM Antenna

●

Antena de FM

● AC 120 V, 60 Hz

●

120 V de CA, 60 Hz

White line

Línea blanca

Red

Rojo

Center

speaker

Altavoz

central

■ Turning the power on and off

■

Conexión y desconexión de la alimentación

■ Remote control

■

Controlador remoto

POWER

POWER

15

15

Black

Negro

Sub

woofer

Altavoz de

subgraves

3

Listening to a CD /

Audición de discos CD

4

Listening to a tape /

Audición de una cinta

5

Listening to the radio /

Audición de la radio

6

Recording from CDs /

Grabaciones de discos CD

7

Sound control /

Control del sonldo

● Label facing up

●

Etiqueta hacia arriba

■ To stop the playback

■

Para detener la reproducción

■ To stop the playback

■

Para detener la reproducción

● Load the disc to be

recorded.

●

Introduzca el disco

que va a grabar.

● CD recording

starts.

●

La grabación de

CD empieza.

■ Volume

■

Volumen

■ Extra bass (X-BASS)

■

Graves extra (X-BASS)

■ Pre-programmed equalizer

■

Ecualizador preprogramado

VOLUME

FLAT

HEAVY-1 HEAVY-2

SOFT-2

SOFT-1 VOCAL

■ To stop the playback

■

Para detener la reproducción

TAPE 1

TAPE 2

TAPE 2

■ Sub woofer volume

■

Volumen de subgraves

– 8 –

Caution on Disassembly

Top Cabinet

(A1)x2
ø3x12mm

(A1)x2
ø3x12mm

Side Panel
(Left)

(B1)x2
ø3x8mm

(B1)x2
ø3x10mm

(B1)x4
ø3x10mm

Back Board

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. 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.

CD-PC672

STEP R EMOVAL PROCEDURE FIGURE

1 Top Cabinet 1. Screw ..................... (A1) x4 9-1

2 Side Panel 1. Screw ..................... (B1) x8 9-1

(Left/right)

3 CD Player Unit/ 1. Turn on the power supply, 9-2

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) x3

5. Screw ..................... (C4) x2

4 Back Board 1. Screw..................... (D1) x6 9-2

(with Digital 2. Socket .................... (D2) x1

Output PWB)

5 Main PWB 1. Socket .................... (E1) x2 10-1

2. Flat Cable............... (E2) x1

3. Flat Wire................. (E3) x1

6 Power PWB 1. Screw ..................... (F1) x4 10-1

7 Front Panel 1. Screw ..................... (G1) x2 10-1

8 Display PWB/ 1. Screw ..................... (H1) x13 10-2

Switch PWB
Headphones PWB

9 Tape Mechanism 1. Open the cassette holder. 10-2

10 Turntable 1. Screw ..................... (K1) x1 10-3

11 Disc Tray 1. Screw ..................... (L1) x2 10-3

12 CD Servo PWB 1. Screw ..................... (M1) x1 10-4

(Note 2) 2. Socket .................... (M2) x4

13 CD Changer 1. Screw ..................... (N1) x4 10-5

Mechanism

14 CD Mechanism 1. Screw ..................... (P1) x1 10-5

2. Socket .................... (F2) x4

3. Holder PWB ........... (F3) x5

2.

Support Bracket ..... (H2) x1

2. Screw...................... (J1) x6

3. Socket .................... (J2) x1

2. Cover ..................... (K2) x1

2. Guide ..................... (L2) x2

DISASSEMBLY

CD-PC672

CD Player
Unit

(C4) x1
ø3x10mm

(D2)x1

(D1)x4
ø3x10mm

(C3) x3

LOCK
LEVER

(C2) x1

Pull

Back Board

Figure 9-1

Figure 9-2

CD Tray Cover

1

Main PWB

(D1)x2
ø3x10mm

CD-PC672

Hook
( C1) x3

1
2

(C2) x1

(C4) x1

Note 1:

How to open the changer manually. (Fig. 9-3)

1. Change, 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 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.

Figure 9-3

– 9 –

CD-PC672

(F3)x5

1 1

Push

2

Pull

POWER
PWB

POWER PWB

(F1)x3
ø3x10mm

Switch PWB

(H1)x2
ø3x10mm

(E1)x2

Push

(E2)x1

(F2)x2

Figure 10-1

Front Panel

(F2)x2

Main PWB

(J2)x1

(F1)x1
ø3x10mm

Front Panel

(E3)x1

Headphoens
PWB

( L1 ) x1
ø3 x10mm

( L2 ) x1

CD Player Unit

( K1 ) x1
ø3 x10mm

( K2 ) x1

Washer

Turntable

Disc Tray

( L1 ) x1
ø3 x10mm

( L2 ) x1

Figure 10-3

( M1 ) x1
ø3 x10mm

(H1)x10
ø3x10mm

(H1)x1
ø3x10mm

(J1)x6
ø3x10mm

Figure 10-2

(G1)x2
ø3x10mm

Display PWB

Headphones
PWB

Open

(H2)x1

Cassette
Holder

Tape Mechanism

( M2 ) x2

CD Servo PWB

( M2 ) x2

CD Player Unit

Figure 10-4

( N1 ) x4

ø3 x12mm
( P1 ) x1
ø2.6 x10mm

Shift Lever

CD Changer
Mechanism

CD Player Base

CD Mechanism

Be careful when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.

Figure 10-5

– 10 –

CD-PC672

CP-C672

STEP REMOVAL

1 Front Speaker 1. Net.......................... (A1) x1 11-1

2. Front Panel ............ (A2) x1

3. Screw ..................... (A3) x4

4. Tip .......................... (A4) x2

5. Screw ..................... (A5) x2

6. Tip .......................... (A6) x2

PROCEDURE

FIGURE

CP-C672

Front Panel

(A2)x1

Net

(A1)x1

(A3)x4

(A5)x2

(A6)x2

Figure 11-1

(A4)x2

Screw Driver

CP-SW672

STEP REMOVAL

1 Front Speaker 1. Net.......................... (A1) x1 11-2

2. Duct Panel ............. (A2) x1

3. Screw ..................... (A3) x4

PROCEDURE

FIGURE

Note:

The rear speakers and center speaker can be easily
disassembled.
Therefore the disassembling method is not described.
For details refer to the disassembling drawing in the Parts
Guide.

CP-SW672

Net
( A1 ) x1

( A3 ) x4
ø4 x16mm

( A2 ) x1

Woofer

Screwdriver

Figure 11-2

– 11 –

CD-PC672

( B1 ) x2
ø2.6 x6mm

Shaft
( B2 ) x1

Stop Washer
( B3 ) x1

Gear
( B4 ) x1

CD Mechanism

Pickup

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3 and 10-14 of the disassembly method to
remove the CD mechanism.

Loading / Up
/ Down Motor

How to remove the loading motor
(See Fig. 12-1)

1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.

How to remove the pickup (See Fig. 12-2)

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).

3. Remove the pickup.

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.

Motor
PWB

( A1 ) x2
ø2.6 x5mm

Figure 12-1

MECHANISM SECTION

• Driving Force Check

Play: TW-2412 Tape 1: Over 80 g

• Torque Check

Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm
Fast forward: TW-2231 — 60 to 120 g.cm
Rewind: TW-2231 — 60 to 120 g.cm

Torque Meter

Torque Meter

Specified Value

Tape 2: Over 80 g

Specified Value

Tape 1

ADJUSTMENT

Tape 2

– 12 –

Figure 12-2

• Tape Speed

Test Tape

Normal MTT-111 Varioble 3,000 ± Speaker
speed resistor in 30 Hz terminal

TAPE MECHANISM

Varioble resistor in motor

Adjusting

Point

motor. (Load
(MM1) resistance:

Figure 12-2

Specified

Value

MM 1
Motor

Instrument

Connection

8 ohms)

CD-PC672

Pin 13 of IC303

Pin 21 of IC303

D

G

S

10 kΩ

TO FREQUENCY
COUNTER

FET : 2SK19 or 2SK54

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

IF 450 kHz 1,720 kHz T382 *1
Band — 530 kHz (fL): T333 *2

Coverage 1.1 ± 0.1 V
Tracking 990 kHz 990 kHz (fH): T331 *1

*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301

• FM RF

Signal generator: 1 kHz, 75 kHz dev., FM modulated

Test Stage

Frequency

Band — 87.50 MHz T301(fL): *1
Coverage 3.4 V ± 50 mV

RF 98.00 MHz 98.00 MHz L312 *2

(10-30 dB)

Frequency

Display

*1. Input: Antenna, Output: TP301
*2. Input: Antenna, Output: Speaker terminal

Setting/

Adjusting

Parts

Serring/

Adjusting

Point

Instrument

Connection

Instrument

Connection

• VCO Frequency

Frequency

Frequency

Display

98.00 MHz 98.00 MHz VR381* Pin 13, Pin 21
(60 dB) and ground

Adjusting

Parts

Instrument

Connection

of IC303

* Adjust for 76 kHz ± 200 Hz.

Notes:

After preparing the test circuit shown in Fig 13-2, connect the
Pin 13 , Pin 21 and ground of the IC303 with test circuit, and
measure the Value.
At this time, apply a standard unmodulated signal input and
adjust the VCO.

MAIN PWB

IC301

T302

FM IF

T333

FM DET

1

L312

FM RF

T331

CNP301
AM LOOP
ANTENNA

AM TRACKING
fH

AM BAND
COVERAGE fL

FM BAND
COVERAGE fL

TP301

13

IC386

IC302

AM IF

IC303

VR381

VCO

20

1

22

T301

T382

21

TP302

1

T381

• Detection

Signal generator: 10.7 MHz, FM sweep generator

Test

Frequency

Stage

Detection 10.7 MHz 98.00 MHz T381 Input: Pin 1 of

IF 10.7 MHz 98.00 MHz T302(Turn Input: Pin 1 of

Frequency

Display

Adjusting

Parts

Instrument

Connection

IC303
Output: TP302

the core of IC301
transformer Output: TP302
T381 fully
counter­clookwise.)

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

Figure 13-1 ADJUSTMENT POINTS

Figure 13-2

– 13 –

CD-PC672

1 2 3

TEST MODE

• 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. 14-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the (

<MEMORY>

LASER ON

<MEMORY>
Tracking on the spot.
SERVO OFF PLAY

) or ( ) key.

<MEMORY>
Tracking on the spot.
SERVO ON PLAY

IL is not performed.

<STOP>

STOP

<PLAY> key input

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

Press <STOP> key.

Stop

<Disc Number 3> key: Track 15

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

Figure 14-1

CD SECTION

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. 14-2)

2. Tracking offset (Fig. 14-3)

3. E/F balance (tracking error balance) (Fig. 14-4)

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.

0.1s

0.50 V
IC1 20 FE

FOCUS
OFF-SET
ADJUST

0.1s

0.50 V
IC1 7 TE

TRACKING
OFF-SET
ADJUST

1
2

Figure 14-2

200 ms
1V/diV
IC 1 15

200 ms
1V/diV
IC 1 7

TO

TE

TRACKING/
ERROR
BARANCE

1

ADJUST

2

Figure 14-4

– 14 –

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

Figure 14-3

Enlarged
View

TRACKING
OFF-SET
ADJUST

1
2

CD-PC672

EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD

Outline

• Namely, two speakers are connected in parallel to one
amplifier.

• In the Pro Logic BYPASS mode the amplifier for C-ch (center

channel) and the amplifier for S-ch (surround channel) are in
MUTE state. The SP output is cut.

• State of element output and terminal output in specific mode

State of set Dolby Pro Logic Dolby Pro Logic On mode
Output point Bypass mode Normal mode Phantom mode

IC501 12 pin L-out Output enabled state Output enabled state Output enabled state

11 pin R-out Output enabled state Output enabled state Output enabled state
IC501 9pin C-out No output Output enabled state No output
IC501 10pin S-out No output Output enabled state Output enabled state
SP OUT L-ch Output enabled state Output enabled state Output enabled state
(SO901) R-ch Output enabled state Output enabled state Output enabled state
SP OUT C-ch No output in MUTE (Q404) state Output enabled state No output in MUTE (Q404) state
(SO901)
SP OUT S-ch No output in MUTE (Q403) state Output enabled state Output enabled state
(SO901)

Test tone output

• Pro Logic ON Normal mode
Press the remote control TEST TONE button.
→Output of only L-ch →Output of only C-ch

↑ ↓

Output of only S-ch ← Output of only R-ch
The test tone (noise) is repeatedly output for output period
(2 sec).
In this case the following indication appears repeatedly.
→TEST →L-ch →C-ch

↑ ↓

S-ch ← R-ch

• Pro Logic ON Phantom mode
Press the remote control TEST TONE button.
→Output of only L-ch →Output of only R-ch

↑ ↓

← Output of only S-ch
The test tone (noise) is repeatedly output for output period
(2 sec).

In this case the following indication appears repeatedly.
→TEST → L-ch → R-ch
↑ ↓
← S-ch←

Relation between VIDEO IN input and output in Pro Logic
ON state

(1) L-ch/R-ch same phase input into VIDEO IN input jack in

VIDEO Function mode

Output point Normal mode

SP out L-ch Almost no output (only omitting component)
(SO901) R-ch Almost no output (only omitting component)

(SO901) SP out C-ch
(SO901) SP out S-ch

Input signal is output.
Almost no output (only omitting component)

• In the normal mode of Pro Logic ON mode the amplifiers for
C-ch and S-ch are in operative state, so that the SP output
appears.

• In the Phantom mode of Pro Logic ON mode the amplifier for
C-ch is in MUTE state, so that the SP output is cut. The
amplifier for S-ch (surround) is in operative state, so that the
SP output appears

Output point Phantom mode

SP out L-ch Input signal is output.
(SO901) R-ch Input signal is output.

(SO901) SP out C-ch SP cut, no output
(SO901) SP out S-ch

Almost no output (only omitting component)

(2) L-ch/R-ch reverse phase input into VIDEO IN input jack in

VIDEO Function mode

(Reverse phase: Phase difference between L and R is 180°)

Output point Normal mode

SP out L-ch
(SO901) R-ch

(SO901) SP out C-ch
(SO901) SP out S-ch Input signal is output.

Output point Phantom mode

SP out L-ch
(SO901) R-ch

(SO901) SP out C-ch SP cut, no output
(SO901) SP out S-ch Input signal is output.

Almost no output (only omitting component)
Almost no output (only omitting component)

Almost no output (only omitting component)

Almost no output (only omitting component)
Almost no output (only omitting component)

• Accordingly, if you want to output signal waveform to C-ch SP
out, give the same phase input into L-ch/R-ch INPUT in the
Pro Logic Normal mode.

If one of channels receives input, C-ch does not output. Only

L-ch or R-ch outputs.

• If you want to output signal waveform to S-ch SP out, you can
use either Normal mode or Phantom mode. However, 180°
reverse phase input must be given to L-ch/R-ch INPUT.

– 15 –

CD-PC672

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
electrolytic capacitor, the expression “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.

• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas­sis 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.

REF. NO DESCRIPTION POSITION POSITION

SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW701 POWER 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 REW ON—OFF
SW711 REC PAUSE ON—OFF
SW712 MEMORY/SET ON—OFF
SW713 STOP ON—OFF
SW714 TUNER/BAND ON—OFF

FRONT

VIEW

FRONT

VIEW

REF. NO DESCRIPTION

SW715 VIDEO ON—OFF
SW716 TAPE ON—OFF
SW717 CD ON—OFF
SW722 FF ON—OFF
SW723 TUNING UP ON—OFF
SW724 TUNING DOWN ON—OFF
SW725 PLAY ON—OFF
SW728 X-BASS/DEMO ON—OFF
SW729 EQUALIZER ON—OFF
SW730 DIMMER ON—OFF
SW731 PHANTON ON—OFF
SW732 NORMAL ON—OFF
SW733 BYPASS ON—OFF
SWM 3 FOOL PROOF ON—OFF
SWM 4 F.A.S. ON—OFF

E C B
(S)(G)(D)
(1) (2) (3)

KRA102 M
KRA109 M
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR
KTA1271 Y

KTA1273 Y
KTC3203 Y
KTC3194 Y
KTC3199 GR
2SC2389 SE
KTA1274 Y

Figure 16 TYPES OF TRANSISTOR AND LED

B C E

(D)(G)(S)

(3) (2) (1)

2SA1318

– 16 –

1 2 3

SVC211C
SVC348S

FRONT

VIEW

L1154GT4
SLI342YCB
SLI342DCB
SLI342UCB
SLI342YCJ
SLI3256YC
SLI342UCJ1

TO MAIN SECTION

(TO IC601)

SW2

MECHA UP

10

9

SW3

8

SW1

DISC No.

7

6

M3

LOADING

OPEN/CLOSE

M

5

2

3

4

SOLM1

1

CD-PC672

TO MAIN
SECTION

CNS10

+7.3V (B1)

CNP99

+5V

+5V

+B1

Q52

Q1

3

XL1

+5V

2

1

BI1A

BI1B

43
41
36
23

44

45

64

62

1

2

1

2

1

31 38 39 40

XVDD
RVDD
LVDD
VDD
VVDD

6

SERVO/SIGNAL

XOUT

XIN

2

4 8

22

VCC1

SERVO AMP.

LD0

2

5

4

6

3

37

LVSS

RVSS

LCHO

RCHO

IC2

LC78622NE

CONTROL

EFMO

EFMIN

10 12 20

11

9

~

32 40 4344

JP–

IC1

LA9241M

FIN2

2

1

CNP11

Q51

27

CLV+

~

SLC

CV+

FIN1EF

3

4

24 25

CONT2

CONT1

RES. CQCK. COIN

JP–

CE

SL1

DAT

CL

DRF

SL+

SL–

SLD

NC

SPO

FD
TO

46
39
38
33

26

58

~

53

64

~

SQOUT. RWC. WRQ

62
51

53
52
51

54
31
30

29
23
27
16
15

CL, DAT, SELIAL CONTROL/CE

GND (D)

MECHA UP

GND (D)

DISK NO.

10

7

9

8

SL+. SL–. DRF

25
20

7
2
1

23

6

OPEN/CLOSE

GND (D)M–M+

5

2

3

6

4

+B1

+B5

18244020

IC3

M63001FP

FOCUS/

TRACKING/

SPIN/SLED

DRIVER

15

7

45

GND (M)

1

CNP10

3839284142 37 36

16 26

PU-IN SW

35
29

22
21
14

~~

8

27

Q81

REGULATOR

+4.3V

FOCUS COIL

TRACKING COIL

PICKUP UNIT

Figure 17 BLOCK DIAGRAM (1/3)

– 17 –

M1

SPINDLE

MOTOR

M

M2

SLED

MOTOR

M

PICKUP IN

SW4

CD-PC672

9

4

O

3

O

AM LOOP

FM

ANTENNA

ANTENNA

1

L301

FM B.P.F

AM TRACKING

T331 T333

FM FRONT END

2 3 4

L312

IC301

TA7358AP

5

7
FM

OSC

FM RF

OSC BUFF

AM OSC

8

T301

Q301

6

9

FM OSC

FM IF

T301

VT

FM +B

CF301

FMOSC

Q351

SWITCHING

FM IF IN

4.5MHz

20

1

FM

+B4

AM IF

T382

1 3

AM MIX

LA1805

FM/AM IF MPX.

24

23

AM+B

AM OSC IN

X352

22

15

OSC

LC72131

PLL (TUNER)

7

CF351

IC303

22

AM RF IN

FM IN

AM IN

16

IC302

10

+B4

T381

FM DET

21

5

6

GND AM IF

7

STEREO

11

20

FM DET

FM+B MO/ST

DET OUT

17

+B7

CE

3 4

6

5

21

MPX VCO ADJ

MPX IN

Q382

FM/AM
SWITCHING

DODICL

VOLTAGE

REGURATER

17

SWM3

FOOL PROOF

SWM4
F.A.S

SOLM1

SOLENOID

SWM5

CAM

VR381

MONO/ST

15

13

VCO

L

9

10

R

FM/AM

16

11

Q381

IC704

3

1

2

+B4

VOLUME

JOB

VR702

M

MM

TAPE M

FROM CD SECTION
CNP11

TAPE 1

PB HEAD

TAPE 2

REC PB HEAD

L-CH

R-CH

L-CH

R-CH

ERASE
HEAD

REC

P.B

AC BIAS

CNS11

1
2
3

SWITCHING

Q103~Q106

VIDEO IN

L
R
L
R

PLAYBACK AND RECORD

R(T1)

R(T2)

POP REDUCE

L REC
R REC

SWITCHING SWITCHING

Q107
Q108

BIAS
OCS

Q128
L104

AN7345K

/PLAYBACK AMP.

L(T1)

1

24

L(T2)

2

23

L NF

3
4

R NF

T1/T2

6

REC

9

16
14

REF

12

NOR/
HIGH

15 19

Q109

SWITCHING

JK401

IC101

Q111

P.B.

H/N

T1/T2

13

4

21

5

20

7

18

8

17
10

Q110

L
R

L R REC

L NF
R NF
ALC

+B4

PB

SWITCHING

Q124

VIDEO2
VIDEO1
TAPE

TUNER

CD

23 24 25

L

R

L

R

L

R

L

R

L

R

34

IC501

38

LV1035M

35

DOLBY PRO LOGIC

37

DECORD

36

CLDICE

51

61

52

60

59

58

BAIS

Q126

LC75396N

53

AUDIO PROCESSOR

54

55
57

63

49

L

44

R

45

33 32

IC401

9

33

48

X501

56

Q121
Q122

MUTING

22

9

+B4

20
28

R

17
31

L

30
18

33

48

REC

Z

T1/T2

1

IC

BAIS

LA
P

Figure 18 BLOCK DIAGRAM (2/3)

– 18 –

M

MM1

APE MOTOR

Q702
Q703

~~~

1 2 3

4

DISPLAY

15 2516

FL701

26

CD-PC672

~

28

36

37 3839

29

Q705
Q706
Q707

ZD801

+B7

+B7

1

RX701

3

2

+B7

KEY
SW703~SW717
SW722~SW725
SW728~SW733

VR701

Q401
Q402

+B4

+B5

+B2

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31

Sub Woofer
Volume

Q403
Q404

REGULATOR

+12V(ANALOG)

+12V(MOTOR)

+5.6V

535251

VDD

AVDD

282930

PHM1

VOLTAGE

IC806

2

SYSTEM CONTROL

MICROCOMPUTER

+B5

IC650
IC651

KIA4558P

OPE AMP.

IC471

37

4

IC901

16

STK40704

12

POWER AMP.

Q903Q405

D802

VOLTAGE

REGULATOR

13

IC804

2

VOLTAGE

REGULATOR

13

IC805

2

13

VOLTAGE

REGULATOR

IC701

IX0310AW

VDD

+B7

Q904

18

+B

3

–B

2

1

Q801

XL701

4.19MHz

Q601,Q602
Q603, Q604

15

D801

D803~D806

D807
~D809

7170696867666564636261 80797877

737260595857565554

101112131415161718192021222324252627

8

9

7

Q704

FRONT

L-OUT

9

8

R-OUT

20

3A/250V

6

F804

767574

4 3 2 1

5

Q908

81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99

100

VDD

IC601

3

NJM4560D
OPE AMP.

5

F802

5A/125V

F803

5A/125V

F805

2A/250V

4

PT801

POWER

TRONSFORMER

UNSWITCH
+B7

MEMORY
BACK UP

TO CD
SECTION

Q905

+B5

1
7

+B1

M901

M

FAN MOTOR

JK970
HEADPHONES

F903

RL901

4A/125V

Sub Woofer

Q907

RL902

F902 4A/125V

Front
Speaker

Center
Speaker

Rear
Speaker

SO901
Speaker Terminal

T.F

Q906

RL801

F901 4A/125V

AC POWER
SUPPLY CORD

AC 120V, 60Hz

9

13

7

IC951
LA4551
POWER AMP.

+B6

1
6

+B7

+5V

UNSWITCH

Q802

13

IC803

2

D811~D814

Figure 19 BLOCK DIAGRAM (3/3)

– 19 –

PT802

POWER

TRONSFORMER

CD-PC672

2

SLD+

D

A

CNS1B
K

5

E

B

4

A

3

B

2

F

1

C

K
E
A

D

B
F

E

F

CD MOTOR PWB-D

M1

SPINDLE

MOTOR

G

M2

SLED

MOTOR

SW4

PICKUP IN

CNS1A

1
2

3
4
5

PICKUP UNIT

1
2
3
4
5
6
7
8

+
–

+
–

1M

2200P

TR–
TR+
FO+
FO–
GND
PD
VR
LD

SLIDE

PU-IN

SPIN

1/16

1M

2200P

TR+
FO+

FO–
TR–

ACTUATOR

CNS2ACNS2B

1
2
3
4
5
6
7
8

6
5
4
3
2
1

5
4
3
2
1

1
2
3
4
5
6
7
8

M
M

1
2
3
4
5

CNP1

6
5
4
3
2
1

CNS3B

CNP3A

K
A

B
E
F

TR–
TR+
FO+

FO–

GND

PD
VR

LD

6
5
4
3
2
1

1
2
3
4
5
6
7
8

CNP2

CNS3A

R2
1K

C15

0.01

C2

0.01

C54

R13

PD

TR–
TR+
FO+
FO–

LD

CD_GND

100/16

6
5
4
3

CD_PUIN

2
1

CNP3

C1

47/16

R1

22

1/50

Q1

2SA1318

IC1

LA9241M

SERVO AMP.

C4

R11

R12
100

R14
27K

R16

3.3K

C12

0.1

0.047

R22

100K

C9

820

R9

R10

2.2K
C6 0.033

0.068

R15
12K

1K

R20

R21

1.5K

0.022

R8

15K

C5

0.033

0.1/50

C8

C76

C7

C10

180P

R19

R56

0.1/50
TE

0.001

6.8K

1K

C36

100/16

C55

SP+
SP–
SL_+
SL_–

C3

R17
33K

C11

0.1

1K

6.8K

1
2
3

4
5
6

7

8
9

10
11

12

13
14

TO

15

FD

16

VREF

VCC1
FIN2

REF
FIN1

REF

E
F

TB
TE–

TE

TESI
SCI

TH

NC
TD–

TD
JP

R18

15K

1
2
3
4

5

6

7
8
9

10
11
12
13
14
15
16
17
18
19

20
21

64

C34

0.33/50

63 62

LDS

–
+

–
+

–
+

REF

REF

REF

REF

–

+

GEN

REF

+

–

FD–

17

TO
FD
FO (GAIN)
FO+
FO–
TR+
TR–

GND

SL–
SL+
SLD
VCC1
STANDBY
Vref
MUTE

C32

0.01

C33

0.47/50

560

R46

60

61

BHI

LDO

RF

–
+

–
+

–
+

+

–

REF

+

REF

–

TO

REF

+
–

GEN

REF

+
–

FA

FA–

18

19

R23 10K

R24
47K

IC3

M63001FP

59

PHI

FE1

REF

VCR

VCR

–

VCR

+

VCR

+
–

+
–

TGL1
THDL

JP

FSC

FOSTA

REF

GEN

+
–

+

–

REF

FE

AGND

SP

FE–

21

23

22

20

C13

330P

R26
82K

C14

0.01

R25

1.5K

42

LD_M+

41

LD_M–

40

VCC4

M–

39

M+

38

SOL–

37
36

SOL+

35

34
33
32

GND

31
30

29

28

VCC3

27

SP+
SP–

26
25

SPO

(SPN)

24

VCC2

23

SOLD

22

SOL–

FOCUS/TRACKING/SPIN/SLIDE DRIVER

REF

R27
39K

LF2

GL
THD

58

VR

–
+

VCC

REF

FE1

REF

SPI

24

C16

0.0047

1.2K

C82

100/16

C77

100/16

C31

220/6.3

+
–

+
–

+

–

+
–

+
–

S.Q.R

REF

+

–

SPG

25

R28

R31

0.47/50

57

REF1

DEF
HFL

DRF

FSTA

+

26

10K

C18

C30

–

SP–

0.001

0.1/50

56

EFBAL
FOSTA
TOSTA
2FREQ

LASER

8/12CM

REF

REF

JP

C17

R29

R30

6.8K

VCC2

FSTA

SLOF

SPO

27

56K

55

FSS

+
–

+
–

REF

SLEO

28

1.2K

54 53

DRF

SLOF

SLOF

C20

47/16

R33

52

CE

DAT

CV–
CV+

JP–

JP+
JPCLO

OR

REF

C19

1/50
R32

10K

R34

3.3K

51

CL

CE
CL

LATOH

SLOF

SLD

REF

29

+
–

50

FSC

REF

RF

+
–

CLK

30

49

DEF

+

SL–

C21

NC

TBC

DGND

SLI

+

–

SLC

RFS–

–

RFSM

CV+
CV–
SLOF

HFL

TES

TOFF

TGL

JP+

JP–

SL+

31

32

0.0033

R35

220K

R45

4.7K

48

C29

4.7/50

C28

0.001

R40

5.6K

HF

TP1

220K

GND

C24

2.2P

C26

0.033

R41
47K

C25
27P

R43

56K
R38

470

0.1

C35

1/50

R44
33K

R42
47K

R39

1K

D1

1SS133

C23

0.0027

C22

220P

C57

0.001

47
46

45
44

C27

43

42

41

40
39
38
37
36
35
34
33

R36

R37
82K

+B

R47
10K

C37

0.02

CQ CK(DSP)

CO IN(DSP)

SQ OUT(DSP)

D_GND

RES(DSP)

WRQ(DSP)

CNP12

RWC(DSP)

1 2 3

DRF(ASP)

4

6

5

8

7

CNS12

FROM DISPLA

P29 12-

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.

1

23456

Figure 20 SCHEMATIC DIAGRAM (1/12)

– 20 –

C57

0.001

R51

3.3M
C39

0.047

R57 1K
R58 1K
R59 1K

R61 1K
R62 1K

R63 1K

R50
680

C40

0.047
R52
27K

R53

1.2K

C56

0.022

14

10
11
12
13

15
16

C38

0.01

1
2

3
4

5

6
7
8
9

64

TEST1

DEF1
TA1

PDO
VVSS

ISET

VVDD
FR
VSS
EFMO
EFMIN

TEST2
CLV+

CLV–
V/P

HLF
TES

1K

R60

63

62

61

/CS

TEST5

LC78622N

SLICE
LEVEL

CONTROL

CLV

DIGITAL

SERVO

SERVO

COMMAND

TGL

TOFF

18

17

19

C46

60

4M

16M

CONTROL

JP+

JP–

20

100P

59

NC

IC2

VCO

CLOCK

OSC

21

(CH)

58

55

56

57

/RES

COIN

/CQCK

SQOUT

TEST11

MICRO-COM

INTERFACE

NC

2KX8
RAM

ERROR

COERECT

FLAG

CONTROL

SYNC-DETECT

EFM DEMODULATE

SERVO/

SIGNAL

CONTROL

NC

NC

CONT1

PCK

FSEQ

VDD

22

23

24

R88 1.2K

54

52

53

FSX

RWC

WRQ

NC

EXTERNAL

OUTPUT

CONT2

CONT3

27

26

25

R90 220

R89 1.2K

C44

100P(CH)

51

50

SFSY

SBCK

SUB-CODE

GENERATOR

CONT4

EMPH

CONT5

29

28

NC

R91 1K

C45

100P(CH)

49

NC

X-TAL

4FS

C2F

31

30

NC

NC

R54
330

C47

C48

100P

100P(CH)

NC

PW

NC

XVDD

MUTER

RVDD
RCHO

FILTER

DIGITAL

1BIT DAC

MUTEL

TEST4

DIGITAL

OUT

NC

DOUT

TEST3

32

PIN27

TRY SPEED
HIGH

LOW

BI1-B

2
1

EFLG
SBSY

XVSS

XOUT

RVSS

LVSS
LCHO

LVDD

C49

NC

XIN

NC

NC

100P(CH)

48
47

46

45
44

43
42
41
40

R72

39

2.7K
R71

38

2.7K

37
36
35
34
33

R65

1K

C41
12P

C42
15P

R93
220

C83

0.022

C71

10/50

C43

330/6.3

D81

L61

0.82µH

C50

0.022

XL1

16.934MHz

D82

1SS133

C72

10/50

R74

100K

R73

100K

R55

100

C51

100/16

1SS133

+5V

CD_RCH

C74

220P

C73

220P

KTC3203 Y

R64

22

C52

100/16

A_GND

CD_LCH

Q52

R66

220

ZD61

MTZJ5.6B

BI1-A

2

1

CD-PC672

R-CH

1

A_GND

2

L-CH

3

D-GND

4

+7V

+12V

+B

C75

0.001

+B

BI99

5
6

CNP11

CNS11

P22 6-A

FROM MAIN PWB

CNP99

3 3
2 2
1 1

CNS99

P31 12-B

R47
10K

C37

0.022

D_GND

RES(DSP)

DRF(ASP)

SLD+

6

8

9

7

CNS12

DISPLAY PWB

P29 12-D

SLD–

PUIN SW

11

10

OP/CLOS

DISC NO.

14

12 13

PCCL

UP/DOWN

15

R82

390

D92

R83

1SS133

D93

1SS133

390

KRC102 M

Q51

R80
820

R81

820

R84

2.2K

D91

1SS133

M+
M–

CD_D_NO

CNP10

CD SERVO PWB-B

+B

SOL+

1

SOL–

2

M+

3

M–

4

GND(D)

5

OPEN CLOSE

6

DISC NO.

7

GND(D)

8

MECHA UP

9

10

GND(D)

1
2
3
4
5
6
7
8
9

10

CNS10

CD SIGNAL

SOLM2

SOLENOID

TURNTABLE

BIM5

1
2
3
4
5
6

CD SENSOR PWB-E

1
2

CNS5

UP/DOWN

LOADING MOTOR

–

M

+

OPEN/CLOSE

SW2

MECHA UP

1

DISC NUMBER

2

TO DIGITAL OUT PWB

M3

SW1

SW3

• The numbers 1 to 12 are waveform numbers shown in page 41.

7

8 9 10 11 12

Figure 21 SCHEMATIC DIAGRAM (2/12)

– 21 –

CD-PC672

M

0

0

C438 22/25

M

3

A

TO TUNER SECTION

P27 12-F

123456789

DI

CE

DO

A_12V

TUN_L

TUN_R

A_GND

TUN_SM

TO DECK SECTION

P25 12-B

10 11 12 13 14 15 16 17 18 19 20 21

CL

D_GND

BIAS

T1/T2

A_12V

D_GND

REC_MUTE

M_GND

REC_R

A_GND

+B

REC_L

TAPE_L

TAPE_R

TO CD SERVO PWB

P21 12-C

CNP11

123456

123456

+B

LCH

7.3V

RCH

A_GND

D_GND

M_12V

CNS11
BI401

B

C

D

E

FFC701

TAPE BIAS

SUB_VOL_IN

SUB_VOL_OUT

CNP701

TO DISPLAY PWB

P28 1-D

CNP502

SPN_P

POWER

SR_MUTE

C MUTE

S_MUTE

T1/T2

REC/PLAY

H/PSW

TUN SM

D_GND

D_GND
SPEANA3
SPEANA2
SPEANA1

M_+12V

CLK

ENA

A_GND

R505 4.7K
R506 4.7K
R507 1K
R509 4.7K

R512 4.7K
C532 220/16
C563 0.022

+B

0.

D515

1N4004S

D516

1N4004S

+B

C408
C410

C412

C414

C416

C418

C420

0.0047(
C42

1/5

+B

+B

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17

R522 1K

18

CE

R521 1K

19

DI

DO

20

Q11

21
22
23
24
25

+B

C510 0.47/50
C512 4.7/50
C511 0.47/50
C513 4.7/50
C516 0.15/50
C518 3.3/50

C520 0.15/50

C522 0.15/50
C525 3.3/50
C526 0.15/50
C528 4.7/50
C529 0.47/50
C530 4.7/50
C533 0.47/50

+B

R516 1K
R523 1K
R517 1K

0.1(ML)

C501
(ML)

49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

C543

0.1
C509

0.1(ML)

C502 1/50

L_BPF2

L_BPF1

DC_OUT3
R_RECT

DC_OUT4
L_RECT
VLR_TH
VLR_1
VLR_2
VCS_2

DOLBY PRO LOGIC

VCS_1
VCS_TH
L+R_RECT
DC_OUT2
L-R_RECT
DC_OUT1

R_BPF1

R_BPF2

123456789

C534 0.1(ML)

C535 10/50

R513

3.3K

R501
100K

R502 100K

C505 0.47/50

C504 47/25

C503 1/50

LT_IN

RT_IN

DC_OUT

C_MODE

49

L_BPF3

IC501

LV1035M

DECORDER

64

R_BPF3

L_DC_OUT

R_DC_OUT

C_DC_OUT

S_DC_OUT

C536 10/50

C538 10/50

C537 10/50

R514

330

R518 1K

R519 1K

C507 0.047

C508 680P

C506 0.022

OSC

GND

NS_BPF1

NS_BPF2

S_OUT

C_OUT

VCC

VREF

10 11 12 13 14 15 16

C540

C539

220/16

C544

220/16

C546

0.022

R515

3.3K

10/50

R511

1K

CLK

DATA

L_OUT

R_OUT

C549 100P

C551 100P
R520 22K
C550 100P

33343536373839404142434445464748

CLK

DATA

ENABLE

DC_OUT
DC_OUT

L_OUT

R_OUT

S_OUT

D_GND

R_IN

L_IN

AC_GND

C542
220/16

VSS

OSC
OSC
VDD

IREF

VCC

S_IN

A/D

D/A

DET

NC

R510
18K

32
31
30
29
28

NS

27
26
25
24
23
22
21

20
19
18
17

X501

R503

R504

1K

1M

C547 0.022

C541 220/16
C514 0.082(ML)
C515 0.0033(ML)

C517 0.082(ML)
C519 0.47/50

C521 0.33/50

C523 10/50

C524 10/50

C527 10/50

R508 39K
C531 2.2/50

F

G

MAIN PWB-A1(1/3)

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.

1

23456

Figure 22 SCHEMATIC DIAGRAM (3/12)

– 22 –

+B

R443 22K

C436 22/25

0V

3

4V

Q405

1

KRC104

R442 22K

C437 22/25

D402

DS1SS1
0V
2