AIWA CDC406 Service Manual

CD-C406/C,CP-C406

SERVICE MANUAL

No. S1810CDC406//

CD-C406
CD-C406C
CP-C406

CD-C406 and CP-C406 constitute CD-C406.
CD-C406C and CP-C406 constitute CD-C406C.

• 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 CD-C406 ONLY) .................................................................................................. 2

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

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

RESETTING THE MICROCOMPUTER............................................................................................................................. 4

QUICK GUIDE ................................................................................................................................................................... 5

DISASSEMBLY.................................................................................................................................................................. 6

REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 8

ADJUSTMENT ................................................................................................................................................................... 9

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 11

TYPE OF TRANSISTER .................................................................................................................................................. 11

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 12

BLOCK DIAGRAM ........................................................................................................................................................... 13

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................16

VOLTAGE ........................................................................................................................................................................ 28

TROUBLESHOOTING ..................................................................................................................................................... 29

FUNCTION TABLE OF IC................................................................................................................................................ 33

FL DISPLAY......................................................................................................................................................................39

REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (FOR CD-C406 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-C406/C,CP-C406

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

IMPORTANT SERVICE NOTES (FOR CD-C406 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

TEST PROBE

CONNECT TO
KNOWN EARTH
GROUND

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.

SPECIFICATIONS

CD-C406/C

General

Power source: AC 120 V, 60 Hz
Power consumption: 40 W
Dimensions: Width; 10-5/8" (270 mm)

Weight: 9.2 lbs. (4.2 kg)

Amplifier section

Output power: 10 watts minimum RMS per channel into
(CD-C406) 8 ohms from 100 Hz to

Output power: MPO; 36 W (18 W + 18 W)
(CD-C406C) (10 % T.H.D.)

Output terminals: Speakers; 8 ohms

Tuner section

Frequency range: FM; 87.5 - 108 MHz

Height; 11-1/16" (280 mm)
Depth; 13-1/8" (332.5 mm)

20 kHz, 10 % total

harmonic distortion

RMS; 20 W (10 W + 10 W)
(10 % T.H.D.)

Headphones; 16 - 50 ohms
(recommended; 32 ohms)

AM; 530 - 1,720 kHz

Cassette deck section

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

55 dB (TAPE 2, 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-con-ductor

laser pickup

D/A Converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)

CP-C406

Speaker section

Type: 2-way type [4" (10 cm) woofer and super

tweeter]

Maximum input power: 20 W
Impedance: 8 ohms
Dimensions: Width; 6-11/16" (170 mm)

Height; 11" (280 mm)
Depth; 5-15/16" (151 mm)

Weight: 3.1 lbs. (1.4 kg)/each

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

– 2 –

NAMES OF PARTS

CD-C406/C,CP-C406

CD-C406/C

Front Panel

1. Disc Tray

2. CD Play Indicator:

3. Disc Number Indicators

4. FM Stereo Mode Indicator: ST

5. Extra Bass Indicator: X-BASS

6. Memory Indicator

7. CD Pause Indicator:

8. CD Repeat Indicator:

9. FM Stereo Indicator:

10. Function/CD Track/CD Counter/Frequency/Preset
Channel/Volume Indicator

11. Power Switch

12. Memory Button

13. Extra Bass Button: X-BASS

14. Volume Up/Down Buttons:

15. Function Selector Button

16. Band Selector Button

17. Tuning Up/Down Buttons:

18. Track Down/Review/Preset Down Button:

19. Play/Repeat Button:

20. Stop Button:

21. Track Up/Cue/Preset Up Button:

22. Disc Skip Button

23. Open/Close Button:

24. Headphone Socket

1

23 4

123

5

X-BASS

ST

7

810

1112

9

13

15

16

17 18 19 20 21 2223 24

6

MEMORY

14

25. (TAPE 1) Cassette Compartment

26. (TAPE 2) Cassette Compartment

27. (TAPE 1) Record Button:

28. (TAPE 1) Play Button:

29. (TAPE 1) Rewind Button:

30. (TAPE 1) Fast Forward Button:

31. (TAPE 1) Stop/Eject Button:

32. (TAPE 2) Play Button:

33. (TAPE 2) Stop/Eject Button:

Rear Panel

1. AC Power Input Socket

2. Speaker Terminals

3. FM/AM Loop Aerial Socket

/

/

25

26

2728293031 32 33

1
2

3

– 3 –

CD-C406/C,CP-C406

CP-C406

Speaker Section

4. Bass Reflex Duct

5. Speaker Wire

5

4

CD-C406/C

Remote Control

1. Remote Control Transmitter LED

CD Control section

2. Stop Button:

3. (CD) Track Down/Review Button:
(TUNER) Preset Down Button:

4. (CD) Track Up/Cue Button:
(TUNER) Preset Up Button:

5. Play/Repeat Button:

6. Disc Skip Button

7. Pause Button:

8. Memory Button

9. Clear Button

Common section

10. Extra Bass Button: X-BASS

11. Function Selector Buttons

12. Power Button

13. Volume Up/Down Buttons:

1

5

2
3

6
7

4

89

10

11

12 13

RESETTING THE MICROCOMPUTER

Reset the microcomputer by performing the
following procedure for the cases shown below:

To erase all of the stored memory contents, or
If the display does not function properly, or
The unit does not operate properly.

1

Press the POWER switch to turn the power off.

2

Press and hold down the POWER switch and button at the
same time. Hold them for at least 1 second.

3

Press the POWER switch to turn the power on.

– 4 –

CD-C406/C,CP-C406

TAPE 1 TAPE 2

FUNCTION

STOP/EJECT PLAY STOP/EJECT

TAPE 1

FUNCTION

RECORD

STOP/EJECT

FUNCTION

BAND

TUNING

ST

FM STEREO

FM MONO

AM

VOLUME

VOLUME UP

VOLUME DOWN

X-BASS

Recording from CDs

Grabación de discos compactos

Tape playback

Reproducción de cintas

Radio operation

Funcionamiento de la radio

Precaución

Sound control

Control del sonido

"Cd" will appear
in the display.

Load the disc to
be recorded.

CD recording starts.

"Tape" will appear
in the display.

"Tuner" will appear
in the display.

Volume

Extra-BASS

"Cd" aparecerá
en el visualizador.

Introduzca el disco
que va a grabar.

La grabación de
CD empieza.

"Tape" aparecerá
en el visualizador.

"Tuner" aparecerá
en el visualizador.

El nivel de sonido en una posición de volumen
fijado depende de una combinación del
rendimiento de las altavoces, la posición y
muchos otros factores. Es aconsejable evitar un
aumento de volumen. Esto se produce, por
ejemplo, al conectar el aparato con el volumen
puesto en una posición alta. Evite continuar la
audición prolongada a altos
niveles de sonido.

En este aparato sólo pueden
reproducirse los discos que
tengan el logotipo mostrado.

Volumen

Bajos extras

X-BASS

VOLUME UP

VOLUME DOWN

X-BASS

MINI COMPONENT SYSTEM

CD-C406

Quick-Guide
Guía rápida

Preparation for use

Preparación para su uso

15

15

FUNCTION

OPEN/
CLOSE

OPEN/
CLOSE

POWER

POWER

Turning the power on and off

Conexión y desconexión de la
alimentación

Remote control

Control remoto

CD playback

Reproducción de discos compactos

Precaution

FM Antenna

AM Loop Antenna

Right Speaker

Left Speaker

AC 120 V, 60 Hz

Connect the wire with the white line to the
minus (−) terminal and the plain wire to the
plus (+) terminal.

2 "AA" batteries

Batteries are not included.

Remote Sensor

8" - 20' (0.2m - 6m)

"Cd" will appear
in the display.

Label facing up

The sound level at a given volume setting
depends on a combination of speaker efficiency,
location and many other factors. It is advisable
to avoid exposure to high volume levels, which
occur while turning the unit on with the volume
control setting up high, or while continually
listening at high volume levels.

Only discs bearing the logo as
shown can be played in this
unit.

Antena de FM

Antena de cuadro de AM

Altavoz derecho

Altavoz izquierdo

120 V de CA, 60 Hz

Conecte el cable con la línea blanca al
terminal negativo (-) y el cable sin línea al
terminal positivo (+).

Dos pilas "AA"

Las pilas no están incluidas.

Sensor remote

0,2m - 6m

"Cd" aparecerá



en el visualizador.

Etiqueta hacia arriba

– 5 –

CD-C406/C,CP-C406

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 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-C406/C

STEP REMOVAL

1 Top Cabinet 1. Screw ..................... (A1) x4 6-1

2 Side Panel 1. Screw ..................... (B1) x6 6-1

(Left/right)

3 CD Player Unit/ 1. Turn on the power supply, 6-2

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) x4

4 Back Board 1. Screw ..................... (D1) x3 6-2

5 Main PWB/ 1. Screw ..................... (E1) x10 7-1

Display PWB 2. Hook ....................... (E2) x2

3. Socket .................... (E3) x6

6 Front Panel 1. Screw ..................... (F1) x4 7-1

2. Hook....................... (F2) x3

7 Tape Mechanism 1. Open the cassette holder. 7-2

2. Screw...................... (G1) x6

8 Turntable 1. Screw ..................... (H1) x1 7-3

2. Cover ..................... (H2) x1

9 Disc Tray 1. Screw ..................... (J1) x2 7-3

2. Guide ..................... (J2) x2

10 CD Changer 1. Screw ..................... (K1) x4 7-4

Mechanism

11 CD Mechanism 1. Screw ..................... (L1) x1 7-4

Note 1:
How to open the change manually. (Fig. 6-3)

1. Insert the tip of fine screwdriver into the hole of CD player
base, and press down the worm wheel <A>.

2. Then, 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.

PROCEDURE

FIGURE

(B1)x1
ø3x12mm

Side Panel
(Right)

CD Player Unit

Back Board

(D1)x1
ø3x8mm

CD-C406/C

(A1)x2
ø3x12mm

Hook

(B1)x2
ø3x12mm

(D1)x2
ø3x8mm

Push

(B1)x2
ø3x12mm

Hook
(C2)x1

Driver

Top Cabinet

Figure 6-1

CD Tray Cover

Figure 6-2

Hook

(B1)x1
ø3x12mm

(C3)x4

< A >

Hook
(C1)x3

(A1)x2
ø3x12mm

Side Panel
(Left)

Hook

(C2)x1

Driver

Push

CP-C406

STEP REMOVAL

1 Speaker 1. Front panel .............(A1) x1 7-5

2. Screw......................(A2) x4 7-6

PROCEDURE

FIGURE

– 6 –

LOCK
LEVER

Figure 6-3

CD-C406/C,CP-C406

Screw
Driver

Driver should be pried
away from Speaker Box.

Direction of handle

Front Panel

(A1) x1

Speaker Box

(E3)x3

(E3)x1

(E1)x2
ø3x10mm

(E3)x1

(E1)x8
ø3x10mm

Hook
(F2)x3

Front Panel

Figure 7-1

Hook
(E2)x2

(E3)x1

(F1)x2
ø3x10mm

Front Panel

Display PWB

Main PWB

( K1 ) x4

ø3 x14mm
( L1 ) x1
ø2.6 x10mm

Shift Lever

CD Changer
Mechanism

CD Player Base

CD Mechanism

Care 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 7-4

CP-C406

(G1)x6
ø3x10mm

( J1 ) x1
ø3 x10mm

( J2 ) x1

( H2 ) x1

Figure 7-2

( H1 ) x1
ø3 x10mm

Open

Cassette
Holder
(Left/Right)

Tape Mechanism

Turntable

Disc Tray

Super Tweeter

Woofer

(A2) x2
ø4x12mm

Figure 7-5

Speaker Box

CD Player Unit

( J2 ) x1

Figure 7-3

( J1 ) x1
ø3 x10mm

Figure 7-6

– 7 –

CD-C406/C,CP-C406

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

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

How to remove the loading motor
(See Fig. 8-1)

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

How to remove the turntable up/down motor
(See Fig. 8-2)

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

up/down motor.

Loading Motor

Turntable
Up/Down Motor

( A1 ) x2
ø2 x5mm

Figure 8-1

( B1 ) x2
ø2 x5mm

How to remove the pickup (See Fig. 8-3)

1. Remove the screws (C1) x 2 pcs., to remove the shaft (C2).

2. Remove the stop washer (C3) x 1 pc., to remove the gear
(C4).

3. Remove the pickup.

( C1 ) x2

2.6 x6mm

( C2 ) x1

( C3 ) x1

Figure 8-2

Pickup

CD Mechanism

( C4 ) x1

Figure 8-3

– 8 –

ADJUSTMENT

L303

R319

T331

T301

L301

L302

CNP301

AM LOOP ANTENNA

T351

T333

IC351

IC301

FM RF

AM TRAKING fL

VCO

AM IF

FM IF

VR351

FM BAND

COVERAGE

FM DET.

AM BAND

COVERAGE fL

T352

MAIN PWB

1

13

21

C360

C364

TP303

TP302

TP301

+

MECHANISM SECTION

• Driving Force Check

Torque Meter

Play: TW-2412 Tape 1: Over 50 g

• Torque Check

Torque Meter

Tape 1

Play: TW-2111 30 to 60 g. cm 30 to 60 g.cm
Fast forward: TW-2231 — 80 to 135 g.cm
Rewind: TW-2231 — 80 to 135 g.cm

• Tape Speed

Test Tape

Normal MTT-111 Volume in 3,000 ± Speaker
speed motor 30 Hz terminal

Adjusting

Point

TUNER SECTION

fL: Low-range frequency
fH: High-renge frequency

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

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

*1. Input: Antenna (CNP301), Output: TP302
*2. Input: Antenna (CNP301), Output: TP301

Frequency Frequency

Display

TAPE MECHANISM

Volume in motor

Specified Value

Tape 2: Over 100 g

Specified Value

Specified

Value

Setting/

Adjusting

Parts

Tape 2

Instrument

Connection

(Load
resistance:
8 ohms)

Instrument

Connection

CD-C406/C,CP-C406

• FM RF

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

Test Stage

Frequency

Frequency

Display

Serring/

Adjusting

Point

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

RF 98.00 MHz 98.00 MHz L302 *2

(10-30 dB)

*1. Input: Antenna (CNP301), Output: TP301
*2. Input: Antenna (CNP301), Output: Speaker terminal

• Detection

Signal generator: 10.7 MHz, FM sweep generator

Test

Frequency

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

Display

Adjusting

Parts

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

• VCO Frequency

Frequency

Frequency

Display

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

Adjusting

Parts

* Adjust for 76 kHz ± 200 Hz.

Notes:

After preparing the test circuit shown in Fig 9-2, connect the
Pin 13 , Pin 21 and ground of the IC351 with test circuit, and
measure the Value.
At this time, apply a standard unmodulated signal input and
adjust the VCO.

Pin 13 of IC351

G

Pin 21 of IC351

FET : 2SK19 or 2SK54

D

S

10 kohm

Figure 9-2

Instrument

Connection

Instrument

Connection

IC301
Output: TP302

Instrument

Connection

of IC351

TO FREQUENCY
COUNTER

Figure 9-1 ADJUSTMENT POINTS

– 9 –

CD-C406/C,CP-C406
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. 10-1)

2. Tracking offset (Fig. 10-2)

3. E/F balance (tracking error balance) (Fig. 10-3)

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

Figure 10-1

TRACKING
OFF-SET
ADJUST

1
2

CD TEST MODE

When the PLAY and POWER keys are
pressed at the same time in OFF MODE, the

set will enter CD TEST MODE
IL is not
performed.

↓

"CD TEST" of LCD will light up.

↓

The pickup can be moved by using the ( ) or

( ) key.

→

↓

LASER ON

↓

FOCUS SERVO ON

↓

TRACKING ON THE STOP

SERVO OFF PLAY

Display "CD 01 0:00"

↓

TRACKING ON THE STOP

SERVO OFF PLAY

↓

STOP "CD TEST" will display

Press PLAY key

Press PLAY key

Press PLAY key

Press PLAY key

Press PLAY key

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

200 ms
1V/diV
IC 1 15

TO

200 ms
1V/diV
IC 1 7

TE

Figure 10-2

Figure 10-3

Enlarged
View

TRACKING
OFF-SET
ADJUST

1
2

TRACKING/
ERROR
BARANCE

1

ADJUST

2

Cancel method: POWER OFF
LCD display: After the PLAY or APMS MEMORY ke y has been

pressed, the track No. and time only will appear
(valid). The other items are optional.

Note: The pickup can be slid using the or key only

while in the stop mode.

ALL CLEAR AND RE-START FUNCTION

When the STOP and POWER keys are pressed to turn on the
power, the entire internal memory will be cleared and the
mechanism will run from address 0.
All of the tuner presets, APMS, TOC and disc numbers which
were last stored in memory will be cleared, and the tuner,
changer mechanism and all of the other items will be initial­ized.

– 10 –

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-C406/C,CP-C406

• 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 MWCHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SW605 TAPE 1 MAIN ON—OFF
SW606 TAPE 2 MAIN ON—OFF
SW607 REC. ON—OFF
SW701 RANDOM/DEMO ON—OFF
SW702 VOLUME DOWN ON—OFF
SW703 X-BASS ON—OFF
SW704 VOLUME UP ON—OFF
SW705 OPEN/CLOSE ON—OFF
SW706 DISC SKIP ON—OFF
SW709 REC./PAUSE ON—OFF
SW710 UP ON—OFF

FRONT

VIEW

FRONT

VIEW

REF. NO DESCRIPTION

SW711 STOP ON—OFF
SW712 PLAY ON—OFF
SW713 DOWN ON—OFF
SW714 TUNING UP ON—OFF
SW715 TUNING DOWN ON—OFF
SW717 POWER ON—OFF
SW718 CLOCK ON—OFF
SW719 TIMER/SLEEP ON—OFF
SW721 MEMORY/SET ON—OFF
SW722 CD ON—OFF
SW723 TUNER ON—OFF
SW724 TAPE ON—OFF
SWM 3 FOOL PROOF ON—OFF
SWM 4 F.A.S. ON—OFF
SWM 5 CAM ON—OFF

FRONT VIEW

2SA1015 GR
2SB561 C
2SC2389 SS
2SC535 C
KRA102 M
KRA109 M
KRC102 M

E C B
(S)(G)(D)
(1) (2) (3)

KRC107 M
KTA1266 GR
KTA1273 Y
KTC3199 GR
KTC3203 Y

E C B
(D)(G)(S)
(3) (2) (1)

2SD2012 Y KDV147BKRC104 M

Figure 11 TYPES OF TRANSISTOR

– 11 –

KV1236Z23F

CD-C406/C,CP-C406

5ms

0.50 V

1

IC1 20 F.E

5ms

5.0 V

2

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

3
1

0.50 V
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

– 12 –

1

2

3

4

6

7

13

12

24

253031

64

6

62

8

26

29 30 31 54 51 54

32

404344

49

50

15

16

27

10

12

20

61

9

45 44 23 11 43

53

58

24

28

373839

40

36

41

1

9

3

7

M

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

1

1

5

17

20

11

29

22 23

32

2

6

~

IC1

LA9241M

SERVO AMP.

RES. CQCK. COIN

SQOUT. RWC. WRQ

IC2

LC78623D

SERVO/SIGNAL

CONTROL

IC5

M56748FP

SL+, SL–, DRF

XIN XOUT

+B

4.3V

FOCUS COIL

TRACKING COIL

M

M

PICKUP UNIT

XL1

16.93MHz

FOCUS/

DRIVER

SPIN/SLIDE/

TRACKING/

PICKUP IN

SW4

Q1

M4

SLIDE

MOTOR

M3

SPIN

MOTOR

+5V

~~

~

~

DEF, CLK, CL, DAT, CE, DRF

~

+B

4.3V

IC91

TA7291S

Q91

Q93

SW2

M3

LOADING/

UP/DOWN

MOTOR

CHANGER MECHA

+B

5V

+B

4.3V

D81

DISC UP SW

CNS10

PU-IN SW

DISC NO. SENSOR

DRF

WRC

RES

RWC

SLM+

SLM–

LOADING H/L

CQCK

SQ OUT

CO IN

12V MECHA

GND

R-CH OUT

AUDIO GND

L-CH OUT

(OPEN)

TO MAIN

SECTION

~

+B

4.3V

5V CDSVO

MECHA UP SW

IC91: MOTOR DRIVER

LASER

POWER

CONTROL

ALPC

SW3

DISC No. SW

SW1

OPEN/CLOSE SW

PL1

PLUNGER

PLUNGER

DRIVER

SW

CD-C406/C,CP-C406

Figure 13 BLOCK DIAGRAM (1/3)

– 13 –

CD-C406/C,CP-C406

4

O

FM FRONT END

TA7358AP

MIX

RF

4

3

1

FM

ANTENNA

FM ANTENNA

AM LOOP
ANTENNA

3
2
1

CNP301

FM AM ANT.

TERMINAL

BF301

2

13

VD301

FM IN

L302 T301 L303

FM RF

AM ANT. AM OSC.

T331 T333

CD
SECTION

IC301

VD331-2VD331-1

6

57

FM IF

B.A

OSC

89

FM
OSC.

VD302

Q302

CF302

FM +B

RF AMP

FM IF IN

10.7MHz

8

D381

+B5

AM IF

T351

CF351

AM MIX
OUT

1

3

IC351

LA1805

FM IF DET. /FM MPX. /AM IF

67

AM +B

AM OSC

AM RF IN

X381

4.5MHz

VT

1

7

FM

Q381

SWITCHING

T352

AM IF
IN

5

FM DET

DET OUT

FM IN

IC381

LC72131

PLL

+B5

FM DET

VCC

20 21 11

L OUT

R OUT

MPX IN

STEREO

MONO/STST

AM IN

ST

101115162220

4

3

6

5

DI

CL

CE

DO

SWITCHING

FM/AM

9

10

131524 17 162322

VDD

21

Q352

L
R

VR351
FM VCO

17

FM +B

VOLTAGE

REGULATOR

ZD381

MM1
TAPE
MOTOR

TAPE2

P.B. HEAD

L-CH

R-CH

TAPE1

REC/P. B. HEAD

L-CH
R-CH

ERASE
HEAD

M

D202D201

+B4

SW606

T2 MAIN

SW605

T1 MAIN

SW608

T1 PLAY

REC. /P. B. AMP.

L NF

Q207~
Q209

BIAS OSC

Q212

L203

24

23

3

22

6

16

12

Nor/
CrO

1
2

9

AN7345K

15

2

IC201

P. B

ALC

L
R

1110

13

4

21

19

7

18

8

17

ALC CUT

Q201
Q202

REC

SWITCHING

Q201
Q206

PB

~

T1 L

T1 R

T2 L

T2 R

R NF

POP
REDUCE

L REC REC
R REC

SWITCHING

VCC

L OUT
R OUT

T1/T2

L REC IN
R REC IN

CLDICE

232425

16 33 14

LR

9

L

T

T

L

21

CD

R

28

L

19

T2 ON

T1 PLAY

T1/T2

+B5

Q210

REC MUTING

Q213

Q211

SWITCHING

REC

REC

SW607

+B4

TUNER

TAPE

R

30

L

17

R

32

Figure 14 BLOCK DIAGRAM (2/3)

– 14 –

KEY MATRIX

CE

SW702 ~ SW716

CD-C406/C,CP-C406

LCD701

COM 0 ~

COM 3

S0 ~ S20

21

22

25

~~

LCD BIAS

~

25 28

29

~~

32
34

KEY IN

37

DO

63

DI

65

CE

66

CL

64

INITIAL1
INITIAL2

IX0217AW

MICROCOMPUTOR

21

COM OUT SEG OUT

IC701

SYSTEM

~~

~

T1/T2

T2 ON

T1 PLAY

POWER CONT.

24

1

535261 62 67 40 51

53 53

VDD

POWER CONT.

1

~

80

69

9

RESET

SYSTEM STOP

REMOCON

59

XL701

4.19MHz

68

13

38

58

Q701

Q702
Q703

POWER FAIL

DETECTOR

RX701

REMOCON

D703

+B6

GRAPHIC EQUALIZER

CL

DI

5

98

AUDIO PROCESSOR

16 33 14 35 56 63 50 26 27 12 37 11 38 10 39

LR

LR

TO CD SECTION

TO CD SECTION

6

7

IC431

LC75394E

GRAPHIC EQUALIZER

V REF

+B4
+12V

+B5
+12V

+B6(5V)

L VREF

(MECHA)

(ANALOG)

5

R VREF

4

A VSS

VSS

Q925
Q926

VOLTAGE

REGULATOR

IC922

VOLTAGE

REGULATOR

IC921

3

X- BASS

2

1

VOLUME

VOLTAGE

REGULATOR

Q924

VDD

4847464544434241402324

OUT

8

5

L

55

R

7

5

+B5

Q641

VOLTAGE
REGULATOR

IC601
LA4282
POWER AMP.

2

L-IN

5

R-IN

1

NF

6

3

P-CONT

D905 ~ D908

4

GND

9

L-OUT

11

R-OUT

7

10

12

VCC

GND

33V

D901 ~ D904

SPEAKER SWITCH

T901
POWER

TRANSFORMER

T.F

J601
HEADPHONES

120V

SO601
SPEAKER
TERMINAL

AC SOCKET

SO901

AC POWER

SUPPLY CORD

AC 120V 60Hz

Figure 15 BLOCK DIAGRAM (3/3)

– 15 –

CD-C406/C,CP-C406

0.01

C1

R1
1K

C2
47/10

Q1

KTA1266 GR

C25

0.01

LA9241M

SERVO AMP.

C3

0.1/50
R2

100K

C4

0.001

R4

2.2K
C6 0.033

R5

6.8K

R6
100

R7

1K

C9

0.047

R9

(ML)

27K

R11

3.3K

C75

100P

R281KR29

R39
22K

R40
22K

C11

0.1

(ML)

3V

C5

0.033

3.6V1.3V

R8

12K

C10

180P

330/10

IC1

(ML)

C8

0.068

1K

C44

15K

C7

0.1/50

(ML)

+B

C24
1/50

R3

(ML)

R12
15K

R43

12

R13
33K

VCC1

FIN2

1

REF

FIN1

2

REF
E

3

F

4

TB

5

TE-

6

TE

7

TESI

8
9

SCI

TH

10

11
12

TD-

TD

13

JP

14

TO

15

FD

16

C13

0.1

(ML)

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18

+B

R45 1K

4.7K

R32

C21

1/50

+B

56K

C45

4.7/25

C34

0.033
(ML)

R36
47K

C32
27P

R35
470

C50

0.1
(ML)

R34

1K

C31

0.0027

R46 1K
R47 1K

R38
33K

R37
47K

D2

1SS133

+5V

C53
220P

LUG1

C40

0.33/50
C39

C38

0.01

C37

C35

58

FE1

C15

VR

+
–

+
–

–
+

+
–

+

–

+

–

REF

REF

–

REF

SPI

252627

24

0.0047

220/6.3

56

57

REF1

DEF

HFL

DRF

VCC

REF

FSTA

S.Q.R

+

–

+

SPG

SP–

R21
56K
R22

R20 10K

6.8K

R23

1.2K

C17

0.47/50

0.1/50

VCC2

EFBAL
FOSTA

TOSTA

2FREQ
LASER

FSTA

8/12CM

SLOF

REF

JP

C16

0.001

55

FSS

DRF

+

–

+

–

JPCLO

REF

SLEO

SPO

28

C19
47/10

R25

CV–

CV+

JP–

JP+

OR

1.2K

49

DEF

CL

CE

CLK

DAT

FSC

CE

REF

CL

LATOH

REF

RF

RFSM

CV+

CV–

SLOF

SLOF

SLOF

SLOF

+

–

TES

+

–

REF

SL–

SLD

SL+

29

30 31

C18

1/50

10K

R24

18K

R30

R41

48

TBC

47

46

DGND

45

SLI

44

––+

C33

0.001

SLC

43

R33

5.6K

RFS–

42

+

C30

2.2P

41

TP1

40
39
38

HFL

37

36

TOFF

35

TGL

34

JP+

33

JP–

32

R27

220K

C20

0.0033

R26

220K

R10
82K

50

54

515253

0.47/50

560

R42

64

63

62

LDS

LDO

–

+

RF
–
+

–

–

+

+

REF

–

+

VCR

REF

–

+

+

REF

–

REF

REF

+

–

+

GEN

REF

–

TO

REF

GEN
+
–

REF

REF
+

+

–

–

FA

FA–

FD-

19

17

18

R14

10K

R15

47K

IC5

M56748FP

596061

LF2

PHI

BHI

REF

FE1
REF

VCR

VCR

–

+

VCR

+
–

+

TGL1

–

GL

THDL

THD

JP

FSC

FOSTA

GEN

REF

+

–

+

–

REF

AGND

SP

FE

FE–

23

22

20

21

C12

330P

R17

82K

C14

0.01

R16

1.5K

R19
39K

36
35
34
33
32
31
30

29
28
27
26
25

R31

24

10K

23
22

FOCUS/TRACKING/

SPIN/SLIDE DRIVER

21

20
19

+B

A

CNS1B

K

B

1
2

E

3

A
B

4

F

5

CNS1A

1
2
3
4
5

CNP1

1
2
3
4
5

C

PICK UP UNIT

K

1

E

2

A

3

B

4

D

F

5

1
2
3
4
5
6
7
8

1/16

VR1A

1M

2200P

1M

2200P

TR+

FO+

FO­TR-

ACTUATOR

E

CNS2B

CNS2A

CNP2

1

1

1

TR_

2

2

2

TR+

3

3

3

FO+

4

4

4

FO_

GND

F

CD MOTOR

PWB-B

5

5

5

PD

6

6

6

VR

7

7

7

LD

8

8

8

CNS3B

CNS3A

M1

SPIN

M

MOTOR

G

M2

SLIDE

MOTOR

SW4

PU-IN

M

6
5
4
3
2
1

CNP3

SP+

6

6

SP_

5

5

SL+

4

4

SL_

3

3

PU-IN

2

2

1

1

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 11.

1

23456

Figure 16 SCHEMATIC DIAGRAM (1/9)

– 16 –

R54

1K

PUIN

SL–

SL+

1324

DRF

TO