AIWA CDC662B Service Manual

CD-C662

SERVICE MANUAL

No. S4917CDC662//

CD-C662

CD-C662 mini component system consisting of CD-C662 (Main unit)
and CP-C662 and (Speaker system).

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

CONTENTS

Page

IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)....................................................................................................... 2

SPECIFICATIONS ............................................................................................................................................................. 2

NAMES OF PARTS ........................................................................................................................................................... 3

OPERATION MANUAL ...................................................................................................................................................... 5

QUICK GUIDE (FOR U.S.A. ONLY) .................................................................................................................................. 6

DISASSEMBLY.................................................................................................................................................................. 7

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 10

ADJUSTMENT ................................................................................................................................................................. 10

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 14

BLOCK DIAGRAM ........................................................................................................................................................... 15

SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD................................................................................................18

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 36

FUNCTION TABLE OF IC................................................................................................................................................ 41

FL DISPLAY......................................................................................................................................................................48

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

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-C662

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

SPECIFICATIONS

CD-C662

General

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

Power on; 210 W

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

Height; 13" (330 mm)
Depth; 14-1/8" (358 mm)

Weight: 22.0 lbs. (10.0 kg)

Amplifier section

Output power: 150 watts minimum RMS per

channel into 6 ohms from 60 Hz
to 20 kHz, 10 % total harmonic
distortion

Output terminals: Speakers; 6 ohms

Headphones; 16-50 ohms
(recommended; 32 ohms)
CD digital output (optical)

Input terminal: Video/Auxiliary (audio signal);

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)

CP-C662

Speaker section

Type: 2-way type [7-7/8" (200 mm)

woofer and 3-1/8" (80 mm)
tweeter]

Maximum input power: 300 W
Rated input power: 150 W
Impedance: 6 ohms
Dimensions: Width; 9-13/16" (250 mm)

Height; 13" (330 mm)
Depth; 13-1/14" (335 mm)

Weight: 13.4 lbs. (6.1 kg)/each

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

– 2 –

CD-C662

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. 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

NAMES OF PARTS

CD-C662

9

10
11

14

4

5

2

1

3

6
7

8

13

12

15
16

17
18

19. (CD) Track Down/Review Button
(TUNER) Preset Down Button
(TAPE 2) Rewind Button

20. (CD/TAPE) Stop Button

21. (TAPE) Play Button
(CD) Play/Repeat Button

22. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
(TAPE 2) Fast Forward Button

23. Timer/Sleep Button

24. Clock Button

25. Timer Set Indicator

26. Power Button

27. Function Selector Buttons

28. Equalizer Mode Selector Button

29. Dimmer Button

30. Extra Bass/Demo Mode Button

31. Headphones Socket

32. (TAPE 2) Record Pause Button

33. Memory/Set Button

34. Tuning and Time Up/Cue Buttons

35. Volume Control

36. (TAPE 1) Cassette Compartment

37. (TAPE 2) Cassette Compartment

Rear Panel

38. CD Digital Output Socket

39. AC power lead

40. FM/AM Loop Aerial Socket

41. Video/Auxiliary (Audio Signal) Input Sockets

42. Speaker Terminals

23
24

25
26

27

38

31

19

32

20

33

21

34

22

28

29
30

35

3736

– 3 –

40
41

39

42

CD-C662

CP-C662

Front Speaker

1. Tweeter

2. Woofer

3. Bass Reflex Ducts

4. Speaker Terminals

1

3

4

2

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. Power Button

22. Extra Bass Button

23. Volume Up/Down Buttons

1

2
3

4

5

8
9

10

11

6
7

13 14

16 17 18

15

12

19
20

21 23
22

– 4 –

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" → The 24-ho ur display w ill appear.

(0:00 - 23:59)

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.)

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:

Press the CLOCK button.

Within 5 seconds, press the MEMORY/SET button.

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:

Perform steps 1 - 2 in the section "RESETTING THE

MICROCOMPUTER", on page 15.

Perform steps 1 - 9 above.

(Main unit operation)

In this example, the clock is set for the

12-hour (AM 12:00) system.

1

2

1

2

3

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 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.

CD-C662

– 5 –

CD-C662

SPEAKERS

LEFTRIGHT

RATED SPEAKER INPEDANCE :

6 OHMS MIN.

MINI COMPONENT SYSTEM

Quick Guide/Guía rápida

CD-C662

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

Right speaker

Altavoz derecho

Left speaker

Altavoz 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

Turning the power on and off

Conexión y desconexión de la alimentación

Remote control

Controlador remoto

POWER

Speaker wire x 2

Cable de altavoz x 2

Red

Rojo

Black

Negro

Red

Rojo

Black

Negro

Red

Rojo

15

15

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 sonido

Label facing up

Etiqueta hacia arriba

To stop the playback

Para detener la reproducción

To stop the recording

Para detener la grabación

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

FLAT

HEAVY-1 HEAVY-2

SOFT-2

SOFT-1 VOCAL

To stop the playback

Para detener la reproducción

TAPE 1 TAPE 2

TAPE 2

VOLUME

– 6 –

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. 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-C662

CD-C662

Top Cabinet

Front Panel
(A1)x2
ø3x12mm

Side Panel
(Right)

(B1)x2
ø3x10mm

CD-C662

STEP REMOVAL PROCEDURE FIGURE

1 Top Cabinet 1. Screw ..................... (A1) x4 7-1

2 Side Panel 1. Screw ..................... (B1) x8 7-1

(Left/right)

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. Screw ..................... (C1) x1

3. Hook....................... (C2) x3

4. Hook....................... (C3) x2

5. Socket .................... (C4) x3

4 Rear Panel 1. Screw ..................... (D1) x5 7-2

(with Digital
Output PWB)

5 Main PWB 1. Screw ..................... (E1) x1 8-1

2. Socket .................... (E2) x4

3. Flat Cable .............. (E3) x1

6 Front Panel 1. Screw ..................... (F1) x3 8-1

7 Power Amp. PWB 1. Screw ..................... (G1) x7 8-2

8

Power Supply PWB

9 Display PWB/ 1. Screw ..................... (J1) x13 8-3

Switch PWB 2. Socket .................... (J2) x1

10 Tape Mechanism 1. Open the cassette holder. 8-3

11 Turntable 1. Screw ..................... (L1) x1 8-4

12 Disc Tray 1. Screw ..................... (M1) x2 8-4

13 CD Servo PWB 1. Screw ..................... (N1) x1 8-5

(Note 2) 2. Socket .................... (N2) x4

14 CD Changer 1. Screw ..................... (P1) x4 8-6

Mechanism

15 CD Mechanism 1. Screw ..................... (Q1) x1 8-6

2. Socket .................... (F2) x1

2. Socket .................... (G2) x2

3. PWB Holder ........... (G3) x1

1. Screw ..................... (H1) x4 8-2

2. Screw...................... (K1) x6

2. Cover ..................... (L2) x1

2. Guide ..................... (M2) x2

Back Board

CD Player
Unit

(C1) x1
ø3x10mm

(D1) x3
ø3x6mm

(B1)x4
ø3x10mm

(C4) x3

(D1) x1
ø3x10mm

(C3) x1

Pull

LOCK
LEVER

Figure 7-1

Rear Panel

Figure 7-2

(B1)x2
ø3x10mm

CD Tray Cover

1

Side Panel
(Left)

(A1)x2
ø3x12mm

Hook
(C2) x3

1
2

(C3) x1

(D1)x1
ø3x10mm

Note 1:

How to open the changer manually. (Fig. 7-3)

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 7-3

– 7 –

CD-C662

(E2)x2

(E3)x1

Power Supply
PWB

(E2)x1

(F2)x1

Front Panel

(L1) x1
ø3 x10mm

(L2) x1

Washer

Turntable

Power
Supply
PWB

Power Amp.
PWB

(H1)x4
ø4x8mm

(E2)x1

Power Amp.
PWB

Figure 8-1

(G1)x2
ø3x6mm

(F1)x3
ø3x10mm

Main
PWB

(G1)x5
ø3x10mm

(G2)x2

Push

Main PWB

(E1)x1
ø3x10mm

(G3)x1

1 1

2

Pull

Power Amp.
PWB

Push

(M1) x1
ø3 x10mm

(M2) x1

(N2) x2

CD Player Unit

Disc Tray

(M1) x1
ø3 x10mm

(M2) x1

Figure 8-4

(N1) x1
ø3 x10mm

CD Servo PWB

Main
Chassis

Switch PWB

(J1)x2
ø3x10mm

(J1)x11
ø3x10mm

PowerAmp. PWB

Figure 8-2

(K1)x6
ø3x10mm

Figure 8-3

(J2)x1

Front Panel

Tape Mechanism

Display
PWB

Open

Cassette
Holder

(N2) x2

CD Player Unit

Figure 8-5

(P1) x4

ø3 x12mm
(Q1) x1
ø2.6 x10mm

Shift Lever

CD Changer
Mechanism

CD Player Base

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 8-6

CD Mechanism

– 8 –

CP-C662

STEP REMOVAL

1 Front Panel 1. Net.......................... (A1) x1 9-1

2. Rubber ................... (A2) x4

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

4. Tip .......................... (A4) x2 9-2

2 Woofer 1. Screw ..................... (B1) x4 9-2

3 Tweeter 1. Screw ..................... (C1) x4 9-2

PROCEDURE

Front Panel

CD-C662

FIGURE

(A1)x1

(A2)x4

(A3)x4
ø4x16mm

Figure 9-1

Front Panel

Tweeter

(C1)x4
ø3x10mm

(A4)x2

(B1)x4
ø4x16mm

Woofer

Figure 9-2

– 9 –

CD-C662

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3, 11, 12, 13, 14 and 15 of the disassembly
method to remove the CD mechanism.

How to remove the loading motor
(See Fig. 10-1)

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

How to remove the pickup (See Fig. 10-2)

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.

Loading/Up/Down
Motor

Motor
PWB

(B1) x2

ø2.6 x6mm

(A1) x2
ø2.6 x5mm

Figure 10-1

Stop Washer
(B3) x1

Pickup

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter

Play: TW-2412 Tape 1: Over 80 g

• Torque Check

Torque Meter

Tape 1

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

Specified Value

Tape 2: Over 80 g

Specified Value

Tape 2

Shaft
(B2) x1

Gear

CD Mechanism

(B4) x1

Figure 10-2

• Tape Speed

Test Tape

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

Adjusting

Point

motor. (Load
(MM1) resistance:

TAPE MECHANISM

Specified

Value

MM 1
Motor

Instrument

Connection

8 ohms)

– 10 –

Variable resistor in motor

Figure 10-3

CD-C662

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

IF 450 kHz 1,720 kHz T351 *1
Band — 530 kHz (fL): T333 *2

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

Frequency

Display

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

• FM RF

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

Test Stage

Band — 87.50 MHz L303(fL): *1
Coverage 3.4 V ± 50 mV

RF 98.00 MHz 98.00 MHz L302 *2

Frequency

(10-30 dB)

Frequency

Display

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

• Detection

Signal generator: 10.7 MHz, FM sweep generator

Test

Stage

Detection 10.7 MHz 98.00 MHz T352 Input: Pin 1 of

IF 10.7 MHz 98.00 MHz T301(Turn Input: Pin 1 of

Frequency

Frequency

Display

Setting/

Adjusting

Parts

Serring/

Adjusting

Point

Adjusting

Parts

the core of IC301
transformer Output: TP302
T352 fully
counter­clookwise.)

Instrument

Connection

Instrument

Connection

Instrument

Connection

IC303
Output: TP302

• VCO Frequency

Frequency

98.00 MHz 98.00 MHz VR351* Pin 13, Pin 21
(60 dB) and ground

Frequency

Display

Adjusting

Parts

Instrument

Connection

of IC303

* Adjust for 76 kHz ± 200 Hz.

Notes:

After preparing the test circuit shown in Fig 11-2, 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.

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 11-2

FM BAND
COVERAGE fL

R381

TP301

MAIN PWB

1

IC301

L303

T301

L302

FM RF

FM IF

T351

AM IF

1

T333

IC303

2113

T352

FM DET

VR351

VCO

R360

TP302

Figure 11-1 ADJUSTMENT POINTS

– 11 –

BF301

AM LOOP
ANTENNA

CNP301

T331

AM TRACKING
fL

AM BAND
COVERAGE fL

CD-C662

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. 12-1)
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 12-1

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. 12-2)

2. Tracking offset (Fig. 12-3)

3. E/F balance (tracking error balance) (Fig. 12-4)

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 12-2

200 ms
1V/diV
IC 1 15

200 ms
1V/diV
IC 1 7

TO

TE

TRACKING/
ERROR
BARANCE

1

ADJUST

2

Figure 12-4

– 12 –

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

Figure 12-3

Enlarged
View

TRACKING
OFF-SET
ADJUST

1
2

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.

CD-C662

• 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

JOG701 VOLUME JOG ON—OFF
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 REV ON—OFF
SW711 REC PAUSE ON—OFF
SW712 MEMORY/SET ON—OFF

FRONT

VIEW

REF. NO DESCRIPTION

SW713 STOP ON—OFF
SW714 TUNER (BAND) ON— OFF
SW715 VIDEO/AUX 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
SWM 3 FOOL PROOF ON—OFF
SWM 4 F.A.S. ON—OFF
SWM 5 CAM ON—OFF

FRONT VIEW

E C B

(S) (G) (D)

(1) (2) (3)

2SA1015 GR
2SA1318
2SC3331
2SC535 C
KRA102 M
KRA109 M
KRC102 M
KRC104 M
KRC107 M

KTA1266 GR
KTA1271 Y
KTA1273 Y
KTA1274 Y
KTD2058

L1154GT4
SLI342YCB
SLI342DCB
SLI342UCB

SLI342YCJ
KTC3199 GR
KTC3200 GR
KTC3203 Y

Figure 13 TYPES OF TRANSISTOR AND LED

– 13 –

CD-C662

1

2

5ms

0.50 V
IC1 20 F.E

5ms

5.0 V
IC1 54 DRF

WAVEFORMS OF CD CIRCUIT

STOP PLAY

FOCUS SERCH

0.5ms

6

10.0 V
JP+

0.5ms

7

10.0 V
JP-

0.5ms

8

0.50 V

3
1

JP

0.5ms

9

1.00 V
TE

0.5ms

3

1.00 V
HF

0.5ms

4

5.0 V
HFL

0.5ms

5

5.0 V
TES

0.5ms

1.00 V

3

HF

0.5ms

4

5.0 V
HFL

0.5ms

5

5.0 V
TES

50ms

6

10.0 V
JP+

50ms

7

10.0 V
JP-

50ms

8

0.50 V
JP

50ms

9

1.00 V
TE

CUE

1
2

3

REVIEW

1
2

3

CUE

10

11

10

11

12

20ms

1.00 V
SPO

20ms

2.00 V
CLV+

50ms

1.00 V
SPO

50ms

2.00 V
CLV+

5s
100mV
SLD

PLAY

NORMAL DISC
TN0=01

PLAY

TCD-712 (140mm)
TN0=01

PLAY

TCD-712

0.5ms

10.0 V

6

JP+

0.5ms

10.0 V

7

JP-

0.5ms

0.50 V

8

JP

0.5ms

9

1.00 V
TE

50ms

10.0 V

6

JP+
50ms

10.0 V

7

JP­50ms

8

0.50 V
JP

50ms

9

1.00 V
TE

REVIEW

12

0.5s
100mV
SLD

1

1

– 14 –

27

1

2

3

4

1

8

6

7

18

24

40

20

4

5

15

23

16

26

27

7
2

2520

29

21

22

35

14

38

39

28

41

42

37

36

PU-IN SW

XL1

XIN

LD0

FIN2

JP–

CV+

SLC

SL1

FIN1EF

TO

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

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

9

8

7

6

5

4

3

2

1

GND (D)

MECHA UP

GND (D)

DISK NO.

OPEN/CLOSE

GND (D)M–M+

GND (M)

9

8

7

6

5

4

3

2

1

CNP10

M

+5V

+B1

62

64 45 3623 43

37

31

383940

24

25

10

1

2

2

1

3

3

2

1

4

5

6

10

265853

101220

324043

44

5352515431302923271615

4144

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

BI1B

2

1

BI1A

CNP99

+5V

2

4

8

33

38

39

46

~

646251

11

22

CD-C662

Figure 15 BLOCK DIAGRAM (1/3)

– 15 –

CD-C662

1

4
3

8

M

2

8

M

FM

ANTENNA

AM LOOP
ANTENNA

BF301

FM B.P.F

1

FM FRONT END

2 3 4

L302

AM TRACKING

T331 T333

IC301

TA7358AP

5

7

FM

OSC

FM RF

OSC BUFF

AM BAND
COVERAGE

L303

Q302

8

FM OSC

6

9

FM IF

T301

VT

FM +B

CF301

FM IF IN

FMOSC

Q344

SWITCHING

SWM3

FOOL PROOF

SWM4
F.A.S

SOLM1

FM DET

20

17

+B7

DODICL

6

17

SOLENOID

SWM5

CAM

VR351

MPX VCO ADJ

15

13

VCO

FM/AM

MPX IN

16

11

Q343

FM/AM
SWITCHING

IC704

3

2

VOLTAGE

REGURATER

+B4

MONO/ST

L

9

10

R

1

–B+B5

8

3

IC56

KIA455

5

OPE A

6 7

IC56

KIA455

3

OPE A

8

4

–B1+B5

+B4

AM IF

T351

CF351

1 3

AM MIX

IC303

LA1805

FM/AM IF MPX.

24

23

22

AM+B

AM RF IN

AM OSC IN

X352

4.5MHz

FM IN

20

1

OSC

FM

AM IN

22

16

15

IC302

LC72131

PLL (TUNER)

10

7

+B4

T352

21

6

5

GND AM IF

11

FM DET

FM+B MO/ST

DET OUT

7

STEREO

CE

3 4

5

21

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

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

IC101

Q111

P.B.

H/N

T1/T2

13

4

21

5

20

7

18

8

17
10

Q110

L
R

L NF
R NF
ALC

+B4

PB

L R REC

JK601

VIDEO/AUX

L
R

Q113
Q114

SWITCHING

Q124

L103

AUX
TAPE

TUNER

CD

11

5

L

16

R

4

L

17

R

3

L
R

18

AUDIO PROCESSOR

L

2

R

19

BAIS
Q126

M62439SP

1

20

10

IC601

9

Q121
Q122

MUTING

–B4

R

13

8

L

Figure 16 BLOCK DIAGRAM (2/3)

– 16 –

O/ST

9

0

3
5

3

–B1+B5

8

IC563

KIA4558P

OPE AMP.

6 7

IC562

KIA4558P

OPE AMP.

8

4

–B1+B5

CD-C662

FL701

DISPLAY

Q702

M

Q703

MM1

TAPE MOTOR

4

1

1

+B5

+B7

1

RX701

2

+B7

KEY
SW701,
SW703~SW717,
SW722~SW725,
SW728~SW730

+B7

3

~~~

1 2 3

15 2516

4

50
49
48
47
46

VDD

45
44
43
42
41
40
39
38
37
36
35
34

AVDD

33
32
31

26

535251

282930

+B5

PHM1

36

37 3839

29

IC701

IX0280AW

SYSTEM CONTROL

MICROCOMPUTER

VDD

+B7

XL701

4.19MHz

7170696867666564636261 80797877

737260595857565554

767574

101112131415161718192021222324252627

8

9

6

5

7

Q704

Q705
Q706
Q707

4 3 2 1

+B5

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

100

VDD

TO CD
SECTION

Q907

MEMORY
BACK UP

+B1

M901

M

FAN MOTOR

JK671
HEADPHONES

UNSWITCH
+B7

~

28

Q910

+B5

4

VL–

7

Q803

VH+

Q911

T802

POWER

RL901

F801

5A/125V

SO901
SPEAKER
TERMINAL

FRONT
SPEAKER

RL801

AC POWER
SUPPLY CORD

AC 120V, 60Hz

Q905

L-OUT
R-OUT

Q901
Q902

F804

5A/125V

F805

5A/125V

F806

2A/250V

D802~D805

Q903
Q904

T.F

T801

POWER

TRANSFORMER

TRANSFORMER

13

15

D810

D809

D811~D814

D815
~D817

Q802

14

VH–

2

8

1

Q801

–B4

Q908

Q603
Q604

+B1

+B4

+B5

Q909

+7.3V

+12V(ANALOG)

+12V(MOTOR)

UNSWITCH

+B7

VOLTAGE

REGULATOR

Q853

R

3

L

Q601
Q602

REC

ZD802

T1/T2

BAIS

Q852

Q851

Q850

REGULATOR

REGULATOR

IC901

18

STK40704

22

POWER AMP.

VL+

VOLTAGE

VOLTAGE

VOLTAGE

REGULATOR

Figure 17 BLOCK DIAGRAM (3/3)

– 17 –

CD-C662

R164

R162

µ

0

A

MAIN PWB-A1(2/2)

B

C

P22 2 - E

TO POWER AMP.PWB

D

CHASSIS

E

TAPE1
PLAYBACK HEAD

R-CHL-CH

ERASE

F

HEAD

R-CH

L-CH

G

R635

330

CNS901

L_CH

1

A_GND

2

R_CH

3

GND

4

–15V

5

SP_RLY

6

M_GND

7

M_+12V

8

CNP901

SP_DET

9

HP-L CH

10

HP_GND

11

HP-R CH

12

HP_RLY

13

C103

0.01

MECHA BASE

CNS101

T1_R

1

A_GND

2

T1_L

3

CNP101

CNS102

M_GND

1

ERASE

2

T2_R2

3

A_GND

4

T2_R1

5

T2_L1

6

T2_L2

7

TAPE2
RECORD/
PLAYBACK HEAD

CNP102

D101

1SS133

D102

1SS133

1
2
3

1
2
3
4
5
6
7

FM SIGNAL
CD SIGNAL
PLAYBACK SIGNAL

RECORD SUGNAL

Q603

KTC3199 GR

Q604

KTC3199 GR

–B

+B

+B

9.3V

9.3V

Q104

KTC3200 GR

0V

Q106

KTC3200 GR

KTC3200 GR

0V

0V

0V

Q103

KTC3200 GR

R619

2.2K
C625

0.001
C626

0.001

R620

2.2K

C627

C109

0.047
R113

10K

8.6V

Q109

2SA1318

SWITCHING

0V

0.7V

0V

0.7V

Q105

R105

3.3K

R103

2.2K

R636

330

R615

4.7K

R616

4.7K

C102

0.001

C101

0.001

C106
180P

C105
180P

+B

22/25

R104

2.2K

R106

3.3K

0.7V

0.7V

100K

R653

100K

R652

C634

8200P

R114

10K

R115

C635

8200P

R625
22K

4.7K

Q601

KTC3199 GR

C623

0.001
C624

0.001

Q602

KTC3199 GR

C629
22/25

L601

2.2µH

KRC104 M

SWITCHING

0V

2 3

1

0V

1

0V

2

R112

10K

R102

1K

R101

1K

R108

47K

0V

0V

0V

4.7K

R110

4.7K

R109

0V

0V

0V

Q107

47K

R107

C601

4.7/50

C605

4.7/50

R611

R613

330

10K

C621
10/50

R617

2.2K

R618

2.2K
R614

10K

R628
22K

+B +B

R155

150

Q110

KTC3199 GR

+B

3.4V

3.4V

3

Q111

KRC104 M

SWITCHING

C108

0.001

C112

Q108

SWITCHING

KTC3199 GR

L

C107

0.001

AN7345K

PLAYBACK AND

RECORD/

PLAYBACK

SWITCHING

R111 10K

C153

C155

R

330P

C111
330P

IC101

AMP.

C615

ZD601

MTZJ2.4B

C622

10/50

R171
220K

100/16

3.3/50

R118

1K

24

R117

1K

0.22

R609

2.2K

R169

1.8K

R173

R120

56

C118

0.033
R122

100K

C114
330P

23

C113
330P

R119

56

Q113

C611 0.033

5.6K

R601 1.5K
R603 1.5K
R605 1.5K
R607 1.5K

C613 0.22

10

C617
10/50

C619

0.022

560(1/2W)

R L

C604

C603

4.7/50

4.7/50
Q114

KTC3199 GR

R132

C120

560P

R124

3.9K
C116
47/25

22

21

–

+

112K

Hich=T1

112K

+

–

C115

47/25

100K

R121

R123

C119
560P

C117

0.033

1
2
3
4
5
6
7
8
9

R629

R174

5.6K

KTC3199 GR

33K

R126

5.6K

4 3 2 1

C121

1/50

3.9K
R125

5.6K

20
19
18
17
16
15

IC601

14

M62439SP

13
12
11

AUDIO PROCESSOR

5.6K

C127

R610

C154

47/16

C156

3.3/50

R134 68K

19

6

C128

0.022

10K

R138

3.3/50

R135 18K

R175

R172
220K

C122

1/50

NC

NC

R131

1K

R170

20

5

33K

R623

1.8K

15K

R612

0V

0V

18K

C130

R136

6.8K

18

Hich=CHROME

7

6.8K

R137

C129

R602 1.5K
R604 1.5K

R606 1.5K
R608 1.5K

C612 0.033

C614 0.22

C618

4.7P

C616

C620

10/50

R156
220K

MUTING

R154

0.7V

Q122

KTC3199 GR

R142

560

R140

470P

C132

0.001

C136

C134

22/25

17

–

+

+

–

8

C133

22/25

C131

0.001
R141

560

R139

470P

C135

0.022

ZD602

10K

56

C140

0.082

16
56K
56K

56

C139

0.082

MTZJ2.4B

0.0033

9

0.0033

C602

4.7/50

C606

@

4.7/50

C628

0.22

R624

330

R630 560(1/2W)

–B

REC_R

R153

10K

KTC3199 GR

MUTING

10K

R146

1/50

C142

14

15

Nor/CrO2

ALC

NC

11

10

C141

1/50

R145

10K

R626

2.2K

0.7V

Q121

C145

22/25

RIPPLE

ALC

R157

220K

13

12

C146

220/16

Vcc

GND

R638

220K

R637
220K

REC_L

0V

0V

R158

220

Q124

SWITCHING

2SA1015 GR

L103

R160

R167

R166

C150

+B

11.7V

11.6V

0V

100µH

11.6V

Q12

KTC32

150 (1/2W)

0V

100K

0V

47K

R168

12

0.0039

C151

0.027(ML)

2

H

L104 330

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 13.

1

23456

Figure 18 SCHEMATIC DIAGRAM (1/10)

– 18 –