AIWA CDC478 Service Manual

CD-C478/478C

SERVICE MANUAL

No.S6848CDC478//

CD-C478
CD-C478C

CP-C478, CP-SW478, CENTER(GBOXS0015AWM1)
and Rear (GBOXS0016AWM1) speaker system
Constibute CD-C478/CD-C478C

• 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 ...................................................................................................................................................... 8

QUICK GUIDE ................................................................................................................................................................... 9

DISASSEMBLY................................................................................................................................................................ 12

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 15

ADJUSTMENT ................................................................................................................................................................. 16

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 19

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 20

BLOCK DIAGRAM ........................................................................................................................................................... 21

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 24

TROUBLESHOOTING ..................................................................................................................................................... 48

FUNCTION TABLE OF IC................................................................................................................................................ 52

FL DISPLAY..................................................................................................................................................................... 59

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-C478/478C

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

ACCESSORIES

Remote control × 1

(RRMCG0155AWSA)

FM antenna × 1

(92LFANT1746A)

Front speaker wire × 2

(92L3191SW49210)

AM loop antenna × 1

(QANTL0006AWZZ)

Sub woofer wire × 1

(92L3191SW49210)

– 2 –

SPECIFICATIONS

CD-C478/478C

CD-C478/478C

General

Power source: AC 120 V, 60 Hz
Power consumption: 190 W
Dimensions: Width; 10-5/8" (270 mm)

Height; 12-1/2" (316 mm)
Depth; 13-1/2" (343 mm)

Weight: 22.5 lbs. (10.2 kg)

Amplifier section

Output power: Front speakers; 50 W minimum

RMS per channel into 8 ohms,
from 60 Hz to 20 kHz with no
more than 10 % total harmonic
distortion.
Center speaker; 25 W
(1 kHz, 10 % T.H.D.)
Rear speakers; 25 W (Total)
(1 kHz, 10 % T.H.D.)
Sub woofer; 50 W
(80 Hz, 10 % T.H.D.)

Output terminals: Front speakers; 8 ohms

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

Input terminals: Video/Auxiliary (audio signal) × 2;

500 mV/47 kohms

CP-C478

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)

Front speaker section

Type: 3-way, 5-1/8" (130 mm) woofer,

2" (50 mm) tweeter and super
tweeter

Maximum input power: 100 W
Impedance: 8 ohms
Dimensions: Width; 7-1/2" (190 mm)

Height; 12-1/2" (316 mm)
Depth; 10-7/16" (264 mm)

Weight: 6.6 lbs. (3.0 kg)/each

Center speaker section

GBOXS0015AWM1

Type: 4" (100 mm) woofer
Maximum input power: 50 W
Impedance: 8 ohms
Dimensions: Width; 10-5/16" (262 mm)

Height; 5-3/4" (145 mm)
Depth; 7-15/16" (201 mm)

Weight: 3.1 lbs. (1.4 kg)

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)

GBOXS00116AWM1

Rear speaker section

Type: 4" (100 mm) woofer
Maximum input power: 25 W
Impedance: 16 ohms
Dimensions: Width; 6-3/4" (170 mm)

Height; 4-7/8" (123 mm)
Depth; 6-15/16" (176 mm)

Weight: 1.5 lbs. (0.7 kg)/each

Sub woofer section

CP-SW478

Type: 6-1/2" (160 mm) woofer
Maximum input power: 100 W
Impedance: 8 ohms
Dimensions: Width; 8-11/16" (220 mm)

Height; 12-1/2" (316 mm)
Depth; 11-5/8" (294 mm)

Weight: 8.4 lbs. (3.8 kg)

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

– 3 –

CD-C478/478C

NAMES OF PARTS

CD-C478/478C

Front panel

1. Disc Tray

2. Disc Number Selector Buttons

3. Disc Skip Button

4. Open/Close Button:

5. Dolby Pro Logic Indicator

6. (CD) Disc Number Indicator

7. (TAPE 2) Direction Indicator

8. (TAPE 2) Reverse Mode Indicator

9. (CD) Play Indicator

10. (CD) Repeat Indicator

11. (CD) Pause Indicator

12. (TAPE 2) Record Indicator

13. Timer Record Indicator

14. Timer Play Indicator

15. 4-Speaker Indicator

16. Sleep Indicator

17. Extra Bass Indicator

18. Random Play Indicator

19. (CD/TUNER) Memory Indicator

20. (TUNER) FM Stereo Indicator

21. (TUNER) FM Stereo Mode Indicator

22. Spectrum Analyzer Indicator

1

234

56

10

9

13

11

14

7

12

15

8

17

16

18

19

23. Function Selector Buttons

24. Extra Bass Button

25. Volume Control

26. Power Button

27. Headphone Socket

28. Surround Mode Selector Buttons

29. Equalizer Selector/Demo Mode Button

– 4 –

26

23

27

20

28

21

22

24

25

29

CD-C478/478C

30. Clock Button

31. Sleep Button

32. (TAPE 2) Reverse Mode Button

33. CD Pause Button

34. Jog Dial

35. (CD/TAPE) Stop Button

36. (TAPE) Record Pause Button

37. Sub Woofer Level Control Button

38. Timer Button

39. Memory Button

40. (CD) Clear Button

41. (CD) Track Down/Review Button
(TAPE 2) Fast Wind Button
(TUNER) Tuning Down Button

42. (TAPE 2) Reverse Play Button

43. (CD) Play/Repeat Button
(TAPE 1) Play button
(TAPE 2) Forward Play Button

44. (CD) Track Up/Cue Button
(TAPE) Fast Wind Button
(TUNER) Tuning Up Button

45. Editing Speed Selector Button

38

30

39

31

40 41

32

33

42

34

43

35

44

36

37

45

1. (TAPE 1) Cassette Compartment

2. (TAPE 2) Cassette Compartment

12

– 5 –

CD-C478/478C

FRONT

SPEAKERS

SUB

WOOFER

RATED SPEAKER IMPEDANCE:

8 OHMS MIN.

RIGHT LEFT

REAR

SPEAKERS

CENTER

SPEAKER

RIGHT

RATED SPEAKER

IMPEDANCE:
16 OHMS MIN.

RATED SPEAKER

IMPEDANCE:
8 OHMS MIN.

LEFT

1

2

3

4

5

6

7 8 9 10

Rear panel

1. CD Digital Output Socket

2. Video/Auxiliary (Audio Signal) Input Sockets

3. FM 75 ohms Aerial Terminal

4. Aerial Earth Terminal

5. AM Aerial Terminal

6. AC Power Lead

7. Front Speaker Terminals

8. Sub Woofer Terminals

9. Rear Speaker Terminals

10. Centre Speaker Terminals

CP-C478

Front speakers

1. Super Tweeter

2. Tweeter

3. Woofer

4. Bass Reflex Duct

5. Speaker Terminals

CP-SW478

Sub woofer

1. Woofer

2. Bass Reflex Duct

3. Speaker Terminals

1

2

5

3

4

1

3

2

– 6 –

GBOXS0015AWM1

Centre speaker

1. Woofer

2. Speaker Terminals

GBOXS0016AWM1

CD-C478/478C

1

2

Surround speakers

1. Woofer

2. Speaker Terminals

■ Remote control

11.

Remote Control Transmitter LED

12.

Surround Mode Selector Buttons

13.

Test Tone Button

14.

Sub Woofer Level Control Buttons

15.

Centre Level Buttons

16.

Surround Level Buttons

● Tuner control section

17.

Preset Up/Down Buttons

● CD control section

18.

Track Up/Cue Button

19.

Track Down/Review Button

10.

Memory Button

11.

Disc Skip Button

12.

Stop Button

13.

Play/Repeat Button

14.

Pause Button

15.

Clear Button

16.

Random Button

● Tape control section

17.

(TAPE 2) Record Pause Button

18.

(TAPE 2) Reverse Play Button

19.

(TAPE 1/2) Stop Button

20.

(TAPE 1) Play Button

3

(TAPE 2) Forward Play Button

21.

(TAPE 2) Fast Wind Button

● Common section

22.

Extra Bass Button

23.

Equalizer Mode Button

24.

Function Selector Buttons

25.

Balance Control Buttons

26.

Power Button

27.

Volume Up/Down Buttons

28.

Dimmer Button

1

10

22
23
24
25

26

8
9

2
3
4

1

5 6

15 16

17 18 19 20

2

7

11
12
13
14

21

27
28

– 7 –

SETTING THE CLOCK

In this example, the clock is set for the
12-hour (AM 12:00) system.

CLOCK
POWER

MEMORY

2

3

– 8 –

4

0:00 AM 12:00 AM 0:00

5

6

7

8

9

Jog dial

TUNING
( )

1

Press the POWER button to turn the power off.

2

Press the CLOCK button.

3

Within 5 seconds, press the MEMORY button.

4

Turn the jog dial to select the time display mode.

"0:00" → The 24-hour display will appear.
"AM 12:00" → The 12-hour display will appear.
"AM 0:00" → The 12-hour display will appear.

● Note that this can only be set when the unit is first installed
or it has been reset..

5

Press the MEMORY button.

6

Adjust the hour by turning the jog dial.

● When the jog dial is turned one click clockwise, the time will
increase by 1 hour. When it is turned one click counterclock­wise, the time will decrease by 1 hour.
Keep turning the jog dial to change the time continuously.

● When the 12-hour display is selected, "AM" will change auto­matically to "PM".

7

Press the MEMORY button.

8

Adjust the minutes by turning the jog dial.

● When the jog dial is turned one click clockwise, the time will
increase by 1 minute. When it is turned one click counterclock­wise, the time will decrease by 1 minute.
Keep turning the jog dial to change the time continuously.

● The hour setting will not advance even if minutes advance from
"59" to "00".

9

Press the MEMORY 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.
If this happens, follow the procedure below to change the clock
time.

To change the clock time:

When the unit is off:

➀ Press the MEMORY button.
➁ Perform steps 6 - 9 above.

When the unit is on:

➀ Press the CLOCK button.
➁ Within 5 seconds, press the MEMORY button.
➂ 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:

➀ Perform steps 1 and 2 in the section "RESETTING THE MI-

CROCOMPUTER", on page 28.

➁ Perform steps 1 - 9 above.

(0:00 - 23:59)
(AM or PM 12:00 - 11:59)
(AM or PM 0:00 - 11:59)

RESETTING THE MICROCOMPUTER

EQUALIZER

POWER

/DENO

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 turn the power off.

2

Press the POWER button while holding down the
button and the EQUALIZER/DEMO button.

Caution:

● The operation explained above will erase all data stored
in memory including clock and timer settings, and tuner
and CD presets.

CD-C478/478C

OPERATION MANUAL

MINI COMPONENT SYSTEM
Quick Guide/Guía rápida

1

Check the supplied accessores /

CD-C478

Compruebe los accesorios suministrados

4

Connecting the system /

1

2

Conexión del sistema

3

FM Antenna

Antena de FM

AM Loop Antenna

Antena de cuadro de AM

CENTER
SPEAKER

ALTAVOZ
CENTRAL

– 9 –

Remote control x 1

Controlador remoto x 1

Front speaker wire x 2

Cable de altavoz frontal
x 2

2

How to use the remote control /

Batteries are not included.

Las pilas no están incluidas.

3

Placing the speaker system /

FM antenna x 1

Antena de FM x 1

Sub woofer wire x 1

Cable de altavoz de
subgraves x 1

2 “AA” batteries

Dos pilas “AA”

AM loop antenna x 1

Antena de cuadro de AM x 1

Empleo del controlador remoto

Remote sensor

Sensor remoto

+

­+

-

Situación de los altavoces

Rear speaker

Altavoz posterior

8” - 20’ (0.2m - 6m)

0,2m - 6m

15

15

Wall

Pared

23-5/8” - 35-7/16”
(60 - 90 cm)

60 - 90 cm

AC 120 V, 60 Hz

120 V de CA, 60 Hz

REAR SPEAKER

ALTAVOZ POSTERIOR

RIGHT

DERECHO

With a white line

Con la línea blanca

LEFT

IZQUIERDO

With a white line

Con la línea blanca

Red

Rojo

Black

Negro

RIGHT

DERECHO

With a white line

Con la línea blanca

Red

Rojo

Black

Negro

Red

Rojo

FRONT SPEAKER

ALTAVOZ FRONTAL

Black

Negro

SUB WOOFER

ALTAVOZ DE
SUBGRAVES

LEFT

IZQUIERDO

Red

Rojo

Black

Negro

Red

Rojo

CD-C478/478C

5

Listening to a CD /

Audición de discos CD

6

Listening to a tape /

CD-C478/478C

Audición de una cinta

– 10 –

Press the POWER button to

1

turn the power on.

Pulse el botón POWER para
conectar la alimentación.

Press the CD button.

2

Pulse el botón CD.

Press the OPEN/CLOSE button to

3

open the disc tray and place the CD (s)
on the disc tray, label side up.

Pulse el botón OPEN/CLOSE para abrir la
bandeja del disco y coloque el disco(s) CD en la
bandeja del disco con el lado de la etiqueta arriba.

Press the OPEN/CLOSE button

4

to close the disc tray.

Pulse el botón OPEN/CLOSE
para cerrar la bandeja del disco.

Press the button.

5

Pulse el botón .

Press the POWER button to

1

turn the power on.

Pulse el botón POWER para
conectar la alimentación.

To stop the playback

Para detener la reproducción

Press the button.

Pulse el botón .

Press the TAPE button to select

2

"TAPE 1" or "TAPE 2".

Pulse el botón TAPE para
seleccionar "TAPE 1" o "TAPE 2".

Load a cassette into the cassette

3

compartment.

Inserte un casete en el
compartimiento del casete.

TAPE 1

Press the button.

4

Pulse el botón .

TAPE 2

To stop the playback

Para detener la reproducción

Press the button.

Pulse el botón .

Adjust the volume level.

6

Turn the VOLUME control clockwise
to increase the volume.

VOLUME

Turn the VOLUME control
counterclockwise to decrease the
volume.

Ajuste el nivel de volumen.
Girando el control VOLUME hacia
la derecha se incrementa el
volumen.
Girando el control VOLUME hacia
la izquierda se reduce el volumen.

7

Listening to the radio /

Audición de la radio

8

Recording from CDs /

Grabaciones de discos CD

– 11 –

Press the POWER button to

1

turn the power on.

Pulse el botón POWER para
conectar la alimentación.

Press the TUNER (BAND) button

2

to select "FM ST" ,"FM"or "AM".

Pulse el botón TUNER (BAND) para
seleccionar "FM ST", "FM", o "AM".

Press the TUNING ( / ) button

3

to tune in to the desired station.

Pulse el botón TUNING ( / )
para sintonizar la emisora
deseada.

Press the POWER button to

1

turn the power on.

Pulse el botón POWER para
conectar la alimentación.

Press the TAPE (1 2) button to

2

select the "TAPE 2".

Pulse el botón TAPE (1 2) para
seleccionar "TAPE 2".

Load a cassette into the

3

TAPE2 cassette compartment.

Inserte un casete en el
compartimiento del
casete de TAPE 2.

Press the REVERSE MODE button

4

to select the reverse mode.

Pulse el botón REVERSE MODE
para seleccionar el modo de
inversión.

•••••

One side /

•••••

Both side /

Press the CD button and load the

5

desired disc.

Pulse el botón CD y coloque el
disco deseado.

Una cara

Ambas caras

TAPE 2

To stop the recording

Para detener la grabación

Press the button.

Pulse el botón .

Press the NORMAL EDIT button.

6

Pulse el botón NORMAL EDIT.

CD-C478/478C

CD-C478/478C

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 suffcient care on static electricity of integrated
circuits and other circuits when servicing.

CD-C478/478C

STEP REMOVAL

1 Top Cabinet 1. Screw ..................... (A1) x4 12-1

2 Side Panel 1. Screw ..................... (B1) x8 12-1

(Left/right)

3 CD Player Unit/ 1. Turn on the power supply, 12-2

CD Tray Cover open the disc tray, take out

4 Tuner PWB 1. Socket .................... (D1) x1 13-1

5 Rear Panel 1. Screw ..................... (E1) x11 12-2

6 Main PWB 1. Flat cable ............... (F1) x2 13-1

7 Front Panel 1. Flat wire ................. (G1) x1 13-2

8

Heat Shink Cover

9

Power Amp. PWB

10

Power Supply PWB

11 Display PWB 1. Knob....................... (L1) x2 13-4

12 CD Switch PWB 1. Screw ..................... (M1) x3 13-4

13 Headphones 1. Screw ..................... (N1) x1 13-4

14 Tape Mechanism 1. Screw ..................... (P1) x6 13-4

15 Turntable 1. Screw ..................... (Q1) x1 13-5

16 Disc Tlay 1. Screw ..................... (R1) x2 13-5

17 CD Player Unit/ 1. Screw ..................... (S1) x1 13-6

CD Servo PWB 2. Socket .................... (S2) x4

18 CD Changer 1. Screw ..................... (T1) x4 14-1

Mechanism

19 CD Mechanism 1. Screw ..................... (U1) x1 14-1

the CD cover, and close.
(Note 1)

2. Hook....................... (C1) x3

3. Hook....................... (C2) x2

4. Screw ..................... (C3) x1

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

2. Screw ..................... (D2) x5

2. Flat wire .................

3. Socket...................... (F3) x3

4. Screw....................... (F4) x3

2. Screw...................... (G2) x2

1. Screw ..................... (H1) x4 13-2

1. Socket .................... (J1) x3 13-2

2. Screw ..................... (J2) x6

1. Screw ..................... (K1) x6 13-3

2. Nut.......................... (L2) x1

3. Screw ..................... (L3)x12

2. Cover ..................... (Q2) x1

2. Guide ..................... (R2) x2

PROCEDURE

................................... 13-1

(F2) x3

FIGURE

CD-C478/478C

( A1 ) x2
ø3 x12mm

( B1 ) x2
ø3 x8mm

Side Panel
(Right)

( B1 ) x4
ø3 x8mm

( C4 ) x3

A

CD Player
Unit

( C3 ) x1
ø3 x8mm

( E1 ) x10
ø3 x8mm

Rear Panel

LOCK
LEVER

(C2) x1

Pull

Rear Panel

Figure 12-1

CD Tray Cover

1

Figure 12-2

Top Cabinet

( A1 ) x2
ø3 x12mm

Side Panel
(Left)

( B1 ) x2
ø3 x8mm

Hook
( C1) x3

1
2

( C2 ) x1

Front Panel

Main PWB

Tuner PWB

Note 1:

How to open the changer manually. (Fig. 12-3)

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.

Figure 12-3

– 12 –

(E1) x1

(M1)x3
ø3x10mm

(L3)x12
ø3x10mm

(P1)x6
ø3x10mm

Lug Wire

(N1)x1
ø3x10mm

Open

Headphones
PWB

Display
PWB

(L1)x2

(L2)x1

Washer

Tape Mechanism

Cassette
Holder (Left/Right)

Front Panel

CD Switch PWB

( R1 ) x1
ø3 x10mm

( R1 ) x1
ø3 x10mm

( Q1 ) x1
ø3 x10mm

Turntable

Disc Tray

( Q2 ) x1

( R2 ) x1

( R2 ) x1

CD Player Unit

ø3 x10mm

(D2) x1
ø3x10mm

(F2) x2

Rear Panel

Front Panel

(F2) x1

(F1) x2

(F3) x1

(D1) x1

Tuner PWB

Figure 13-1

CD-C478/478C

(F4) x2
ø3x10mm

Front Panel

(F3) x2

(F4) x1
ø3x10mm

Main PWB

(D2) x4
ø3 x10mm

Figure 13-4

(J2)x5
ø3x10mm

(H1)x4
ø3x10mm

Heat Shink Cover

Power Supply PWB

( J1 ) x1

Figure 13-2

(K1)x4
ø4x8mm

( J2 ) x1
ø3x10mm

Power Amp. PWB

(K1)x1
ø3x10mm

( J1 ) x2

( G1 ) x1

( G2 ) x1
ø3x10mm

Figure 13-5

( S1 ) x1
ø3 x10mm

CD Servo PWB

( S2 ) x2

(K1)x1
ø3x8mm

Figure 13-3

( S2 ) x2

CD Player Unit

Figure 13-6

– 13 –

CD-C478/478C

Woofer

Tweeter

Super

Tweeter

(A5)x2

ø3x10mm

(A3)x2

ø3x10mm

(A4)x4

ø4x12mm

( T1 ) x4

ø3 x12mm
( U1 ) 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 14-1

CP-C478

STEP REMOVAL

1 Front Speaker 1. Net.......................... (A1) x1 14-2

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

3. Screw ..................... (A3) x2

4. Screw ..................... (A4) x4

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

CD Mechanism

PROCEDURE

FIGURE

CP-C478

Tweeter

Front Panel

(A2)x1

Net

(A1)x1

Woofer

Screw driver

CP-SW478

STEP REMOVAL PROCEDURE FIGURE

1 Sub woofer 1. Net.......................... (A1) x1 14-3

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

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

Note:

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

– 14 –

CP-SW478

Net
( A1 ) x1

( A2 ) x1

Figure 14-2

( A3 ) x4
ø4 x16mm

Woofer

Screwdriver

Figure 14-3

REMOVING AND REINSTALLING THE MAIN PARTS

( A1 ) x2
ø2.6 x5mm

Loading / Up
/ Down Motor

Motor
PWB

( B1 ) x2
ø2.6 x6mm

Shaft
( B2 ) x1

Stop Washer
( B3 ) x1

Gear
( B4 ) x1

CD Mechanism

Pickup

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. 15-1)

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

CD-C478/478C

Figure 15-1

How to remove the pickup (See Fig. 15-2)

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.

Figure 15-2

– 15 –

CD-C478/478C

Pin 13 of IC303

Pin 21 of IC303

D

G

S

10 kΩ

TO FREQUENCY
COUNTER

FET : 2SK19 or 2SK54

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 100 g.cm
Fast forward: TW-2231 — 50 to 100 g.cm
Rewind: TW-2231 — 50 to 100 g.cm

• Tape Speed

Test Tape

Normal MTT-111 VRM1 3,000 ± Speaker
speed 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): T302 *2

Coverage 1.1 ± 0.1 V
Tracking 990 kHz 990 kHz (fL): T302 *1

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

TAPE MECHANISM PWB

Frequency Frequency

Display

Specified Value

Tape 2: Over 80 g

Specified Value

Specified

Value

Setting/

Adjusting

Parts

Tape 2

Instrument

Connection

(Load
resistance:
8 ohms)

Instrument

Connection

• FM RF

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

Test Stage

Band — 87.50 MHz L303(fL): *1
Coverage 3.7 V ± 0.1 V

RF 98.00 MHz 98.00 MHz L302 *2

Frequency

(10-30 dB)

Frequency

Display

Serring/

Adjusting

Point

Instrument

Connection

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

• 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

Adjusting

Parts

the core of IC301
transformer Output: TP302
T301 fully
counter­clookwise.)

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 16-2, 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.

VRM1

SWM1

FAS
SW

TAPE
SPEED

Figure 16-1

TUNER PWB

Q342

B C E

VR351

VCO

Figure 16-3 ADJUSTMENT POINTS

AM IF

T351

IC303

13

TP302

FM
DETECTION

– 16 –

IC302

21

T352

Figure 16-2

SO301

20

TP301

L303

FM BAND
COVERAGE fL

1

T304 T302

AM BAND
COVERAGE fL

IC301

L302

T301

FM IF

AM
TRACKING fL

1

FM RF

ANTENNA
TERMINAL

FM 75 ohms

GND

AM

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. 17-1)
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.

CD-C478/478C

<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 17-1

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. 17-2)

2. Tracking offset (Fig. 17-3)

3. E/F balance (tracking error balance) (Fig. 17-4)

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

0.1s

0.50 V
IC1 7 TE

FOCUS
OFF-SET
ADJUST

TRACKING
OFF-SET
ADJUST

1
2

10ms

0.50 V
IC1 20 FE

10ms

0.50 V
IC1 7 TE

Figure 17-2

200 ms
1V/diV
IC 1 15

200 ms
1V/diV
IC 1 7

TO

TE

TRACKING/
ERROR
BARANCE

1

ADJUST

2

Figure 17-4

– 17 –

Figure 17-3

Enlarged
View

TRACKING
OFF-SET
ADJUST

1
2

CD-C478/478C

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

ICC01 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
ICC01 9pin C-out No output Output enabled state No output
ICC01 10pin S-out No output Output enabled state Output enabled state
SP OUT L-ch Output enabled state Output enabled state Output enabled state
(TMV01) R-ch Output enabled state Output enabled state Output enabled state
SP OUT C-ch No output in MUTE (Q604) state Output enabled state No output in MUTE (Q604) state
(TMX11)
SP OUT S-ch No output in MUTE (Q603) state Output enabled state Output enabled state
(TMX11)

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)
(TMV01) R-ch Almost no output (only omitting component)

(TMX11) SP out C-ch
(TMX11) 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.
(TMV01) R-ch Input signal is output.

(TMX11) SP out C-ch SP cut, no output
(TMX111) 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
(TMV01) R-ch

(TMX11) SP out C-ch
(TMX11) SP out S-ch Input signal is output.

Output point Phantom mode

SP out L-ch
(TMV01) R-ch

(TMX11) SP out C-ch SP cut, no output
(TMX11) 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.

– 18 –

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.

REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION

SW1 OPEN/CLOSE ON—OFF
SW2 MECHA UP ON—OFF
SW3 DISC NUMBER ON—OFF
SW4 PICKUP IN ON—OFF
SWD1 VOLUME JOG ON—OFF
SWD2 JOG ON—OFF
SWD3 X-BASS ON—OFF
SWD4 PRE EQ ON—OFF
SWD5 MENU ON—OFF
SWD12 TUNING UP/CUE ON—OFF
SWD13 STOP ON—OFF
SWD14 NORMAL EDIT ON—OFF
SWD15 HIGH EDIT ON—OFF
SWD16 REC/PAUSE ON—OFF
SWD17 F-PLAY ON—OFF
SWD19 SUB WOOFER VOLUME UP ON—OFF
SWD20 SUB WOOFER VOLUME DOWN ON—OFF
SWD24 4SP-1 ON—OFF
SWD25 4SP-2 ON—OFF
SWD27 PHANTOM ON—OFF
SWD28 NORMAL ON—OFF
SWD29 BYPASS ON—OFF
SWD30 TUNING DOWN/REWIND ON—OFF

• 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.

SWD31 CD PAUSE ON—OFF
SWD32 REVERSE MODE ON—OFF
SWD33 R-PLAY ON— OFF
SWD34 CLOCK ON—OFF
SWD35 MEMORY ON—OFF
SWD36 TIMER ON—OFF
SWD37 SLEEP ON—OFF
SWD38 CLEAR ON—OFF
SWD39 VIDEO/AUX 1 ON—OFF
SWD40 VIDEO/AUX 2 ON—OFF
SWD41 TAPE 1/2 ON—OFF
SWD42 TUNER/BAND ON— OFF
SWD43 CD ON—OFF
SWD48 POWER ON—OFF
SWD50 DISC 1 ON—OFF
SWD51 DISC 2 ON—OFF
SWD52 DISC 3 ON—OFF
SWD53 DISC SKIP ON—OFF
SWD54 OPEN/CLOS ON—OFF
SWM3 REC FWD ON—OFF
SWM4 REC RVS ON—OFF
SWM5 F.A.S ON—OFF
SWM6 CAM ON—OFF

CD-C478/478C

KTA1266 GR
KTA1270Y
KTA1271 Y
KTC3199 GR
KTC3203 Y
KRA102 M
KRA109 M

FRONT

VIEW

E C B

(S)(G)(D)

(1) (2) (3)

KRC102 M
KRC104 M
KRC107 M
2SC535 C
2SD468 C
2SC2878 A

FRONT

VIEW

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

2SD2012
2SB1375

SLR325 MG
SLR325 VR
KL052 UL
SLR505 MC
LMKD515B

Figure 19 TYPES OF TRANSISTOR

– 19 –

FRONT

VIEW

FRONT VIEW

KV1236Z23

CD-C478/478C

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

4

3

4

5

6

8

0.5ms

5.0 V
HFL

0.5ms

5

5.0 V
TES

0.5ms

1.00 V
HF

0.5ms

5.0 V
HFL

0.5ms

5.0 V
TES

50ms

10.0 V
JP+

50ms

7

10.0 V
JP-

50ms

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

7

10.0 V
JP-

0.5ms

8

0.50 V
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

– 20 –

PICKUP UNIT

+5V

Q1 Q52

+B1

XL1

+5V

FOCUS COIL

TRACKING COIL

Figure 21 BLOCK DIAGRAM (1/3)

– 21 –

M2

SLIDE

MOTOR

M

PICKUP IN

SW4

M1

DISC

MOTOR

M

FIN2

1

FIN1

2

E

3

F

4

TOFDSPONCSLD

5

6
7

12

13

M56748FP

24

DRIVER

25
30
31

62

LD0

64 45 3623 43

VCC1

IC1

LA9241M

SERVO AMP.

SL–

SL+

3222

IC3

10 11

98

JP–

32

~

40

CV+

43

SLC

44

SL1

DRFCLDAT

20
26

27
28
29
34
35
36

CE

5352515431302923271615

CL, DAT, SELIAL CONTROL/CE

SL+. SL–. DRF

+B1

PU-IN SW

XIN

XOUT

IC2

LC78622K

SERVO/SIGNAL

CONTROL

EFMO

9

10

EFMIN
CLV+

12

~

20

JP–

RES. CQCK. COIN
SQOUT. RWC. WRQ

4144

6

XVDD

RVDD

DOUT

CONT4

CONT1
CONT2

RCHO

40

LCHO

37
31

27

24
25

+12V(+B5)

Q91

8

1

TA7291S

LORDING MOTOR

9

DRIVER

3

IC81

6
5

7

10 10

9
8
7
6
5
4
3
2
1

CNP10

TO MAIN SECTION

+B1

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

CNS10

SW2
MECHA UP

SW3
DISC No.

SW1
OPEN/CLOSE

M

SOLM1

M3
LOADING

VDD

LVDD

VVDD

265853

~

Q93

Q91

TO MAIN
SECTION

+4.3V

CD-C478/478C

REGULATOR

Q81 +7.3V (B1)

CD-C478/478C

1

2
2
2

A
A

G

T

P
E

C

8

U

Y

C

FM
AM

SO301

ANTENNA

TERMINAL

JR11

VCR/AUX1

L

+B7

FM BPF

BF301

AM RF

T202

A1064

AM ANT

1

FM FRONT END

2 3

L302

IC301

TA7358AP

5

4

FM RF

AM

OSC

T204

B1074

7

FM

OSC

OSC BUFF

8

FM OSC

L303

Q202

FM IF

T301

6

9

FM IF
CF301

FM IF IN

1

AM MIX AM IF

AM IF

T351

IC241

24 23227

Q344

FMOSC

+B7

FM

20

7

X352

4.5MHz

OSC

AM OSC IN

221

AM+B

AM RF IN

AM IN

16

15

IC302

LC72131

PLL CONTROLLER

FM +B

R

+B7

653

GND

VCC

FM/AM IF+MPX

LA1805

15 111716

FM/AM

STEREO

MONO/ST

SWITCHING

VOLTAGE

REGURATER

+B7

FM MONO/ST

FM IN

10

17

11

4

3

5621

DICLCE

DO

FM +B

T352

FM DET

FM DET VCO

MPX IN

FM/AM DET OUT

Q343

+5V

VR351

MPX VCO ADJ

132021

MO/ST

9

10

L

R

Q342

7

ICH11

B.P.F

T

T
T
T

T1
T2

C

TAP

T

HI

RE

PB

REC

R

VCR/AUX2

CAM SW
FAS SW

PHM1

TAPE 1

TAPE 2

L

JR12

MOTOR

SWM3
SWM4

SOLM1

PB HEAD

L-CH
R-CH

REC/PB
HEAD
L-CH
R-CH

ERASE
HEAD

R

FUNC-A

10

12

L

TUNER

1

R
L

TAPE

VCR 1

VCR 2

14

5

R
L

15

2

R
L

11

4

R

7

16

-B10

+B10

+B2

MOTOR
DRIVER

M

QL14

DRIVER

DRIVER

QL12

QL11

QL18

QL13

QL17

TA MOT SW

HI SPEED

SWITCHING

TA MOT H/L

T2 A/B-FP

HI SPEED

TA CUM SW
T1 RUN SW

P.B

AC BIAS

T2 PH-IN

REC

DRIVER

P.B

QK03
QK04

REC/PB

QK05
QK06

QK09

QK10

+B2

QL15

POP REDUCE

QK07
QK08

QK11

T2 PH-OUT

TA PUL

QL19

AN7345K

PLAYBACK&RECORD AMP

L(T1)

1

24

R(T1)

L(T2)

2

23

R(T2)

L NF

3

R NF

4

T1/T2

6

REC

L REC

9

16

R REC

REF

14
13

+B7

NOR/
HIGH

12

15

ICK01

T1/T2

P.B.

23 24 25

PB MUTE

QK17
QK18

MUTING

P.B

4

L

21

R

5
20

H/N

L RREC

7

18

L NF

8
17

R NF

ALC

10

19

REC MUTE

QK21
QK22

MUTING

SWITCHING

QK15
QK16

QK19

SWITCHING

T1/T2

51
59
50
60

ICU01

LC75396N

AUDIO PROCESSOR

49
62
48
18
55
30
63

ICC02

NJM4565M

BUFFER AMP.

18
30

8

9
22
23

24

DOLB

2

31

L

DE

REC/PB

QK28
LK04

SWITCHING SWITCHING

BAIS

QK24

QK26

BAIS

Figure 22 BLOCK DIAGRAM (2/3)

– 22 –

CD-C478/478C

2

1

F1

2

FD01

FL DIPLAY

5

43

QG02
QG03
ZDF01

VSS

~

~

435

ICD01

IX0234AW
FL DRIVER u
CONTROLLER

VDD VEE

46

90

72

18

+B2

+B6

+5V

MEMORY
BACK UP

+B3

138915

51

14

SWD01

JOG SW

-VP

UNSWITCH
+B2

27

SWD02

21

~

26

28

T1 RUN

T2 RUN
T2 A FP
T2 B FP
T1 CrO

T2 CrO

CAM-SW

TAPE SOL

TA MOT

HIGH SP

FR SP

BIAS

TA R/P

REC MUT

T1/T2

PB MUTE

PB EQ

REC EQ

REC MUTE

TUNER MUTE

SPE1~5

~

19 23626160787987 88 91 92

29
30
31
32

2

33

2

34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

684967

CE

FUNC A

DOLBY SECTION

AD RES

SW ON/OFF

DIGITAL1

TU-SD

DIGITAL2

AC32RES

TU-DO

AC32SS

ICF01

IX0235AW

SYSTEM MICROCOMPUTER

56

TU CL

DEM 1

AC32SI

AC32SO

V1/V2

AC32SCK

DEM 0

97 98 6

93 94 95 96

82 24 262749 50 51 525463 64 65 66 76

SP DET

H/P SW

POSISTOR

DAT

COM

7

FAN

PROT

FRONT RELAY

STB

SCK

89

CENTER RELAY

SURROUND RELAY

STB

SCK

DAT

RES

9

1078

VDD

VSS

S-MUTE

S-W-MUTE

S-W RELAY

CENTER-MUTE

SURROUND-MUTE

RES

99

CQCK

5

COIN

3

SQ OUT

4

WRQ

11

RWC

100

CD SL+

2

CD SL-

1

CD-PUIN

14

CD-DRF

13

18

56
90

15

57

89

RESET IN

12
16

17

SYSTEM STOP

27

CD O/C

86

CD U/D

85

CD DNO

84

POWER

RXD01
REMOTE

SENSOR

29

RES

12

STB

1

DAT

95

COM

96

SCK

97

+B4 (5V BACK UP)

+B4

RESET

QG01
OSC
X201

4.19MHz

4

1

~

8

10

~

88

79

~

94

91

~

LEDD01~
LEDD28

+B3

P.FAIL DET

FAN

H/P SW

5

7

5

+B-B

D991

D996~D999

D992~D995

SP DET
RELAY
PROT

QV13
QV14

QV18 QV19

QY11

L-OUT

9
8

R-OUT

201

C-OUT

QX13
QX14

QX51

RLYX11
RLYY51
RELAY

QX16

QY51

SL-OUT

9
8

SR-OUT

20

1

SW-OUT

F995
10A

F996
10A

F998

1.6A

F997

2.5A

Q951

VOLTAGE

REGULATOR

VF2

VP

VF1

(AC)

(AC)

SR-MUTE

SW-MUTE

QP13
QP14
QP15

POWER

Q907

SW-IN

POWER
ON/STB

SWITCHING

L-IN

10

12

R-IN

18

C-IN
SL-IN

10
12

SR-IN

18

VOLTAGE

REGULATOR

POSISTOR

7

ICV01
STK407-250
POWER AMP.

+B

-B

3

ICX01

STK407-250

POWER AMP.

+B

-B

3

Q911
Q910

S-MUTE

C-MUTE

QP03
QP04
QP16

+B7

IN

-B6

5M

AMP.

17

28

31

31

ICC01

LU1035M

DOLBY PRO LOGIC

DECORDER

IN

L
R

5
3

-B6

+B7

OUT

8

7
1

4

ICP12

NJM4565M
LOW BOOST
AMP.

-B10

+B2

+B9

+B6

+B7

+B10

+B8

TO CD UNIT

8

L

5
3

R

4

NJM4565M
LOW BOOST
AMP.

-B6

-15V
VOLTAGE

REGULATOR

QZ02

+4.6V

UN-SWITCHED

+5V(DOLBY)

+12V(MOTOR)

VOLTAGE

REGULATOR

+12V(ANALOG)

QZ01

VOLTAGE

REGULATOR

+7.3V(CD)

OUT

7
1

ICP11

L
R

VOLTAGE

REGURATER

VOLTAGE

REGULATOR

Q903

VOLTAGE

REGULATOR

Q904

SWITCHING

REGULATOR

Q902
Q901

Q906
Q905

VOLTAGE

Q909
Q908

F1
F2

F2

KEY IN

TO CD UNIT

QV22
QY12

RLYV11
RLYY11

RELAY

QY52
QY12

T991

POWER

TRANSFORMER

T.F

62

57

QV20
QV21

VF1

(AC)

VF2

(AC)

KEY MATRIX

SWD03~SWD06
SWD12~SWD17
SWD23~SWD48
SWD50~SWD54

+B6

M

FAN

MOTOR

JV91

HEADPHONES

TMV01

SPEAKER

TERMINAL

+

L-CH

-

GND

+

R-CH
GND

­C-CH

+

GND

­+

SL-CH
GND

­+

SR-CH
GND

­+

SW-CH
GND

-

TMV01
SPEAKER
TERMINAL

F990

5A

AC POWER CORD

AC120V 60Hz

Figure 23 BLOCK DIAGRAM (3/3)

– 23 –

CD-C478/478C

4

R2
1K

C1

A

CNS1B

K

CNS1A

5

E

4

A

B

B
F

1

3

2

2

3

1

4

C

LD

MON

K
E
B

LD

GND

A
F

2200P

C

LT0H30M1

D

ACTUATOR

1M

2200P

1M

TR+
FO+

FO–
TR–

K

5

E

4
3

A

2

B

1

F

TR–

1

TR+

2

FO+

3

FO–

4

GND

5

PD

6

VR

7

LD

8

C15

47/16

0.01

CNP1

K

1

A

2

B

3
4

E

5

5

F

C2

0.01

C85

0.001

C4 0.1/50

TE

C54

0.001

R13 1K

R14 27K

C12

0.1

2.2K
R11

6.8K

R10

R12
100

R22
22K

0V

R9

C9

0.047
R15

12K

100K

5V

Q1
KTA1266

C5

0.033
C6

0.033

C8 0.068

R16

3.3K

R21

22K

C10

180P

R20

R8

15K

C7

0.1/50

1K

PICKUP UNIT

E

F

PICKUP UNIT

M1

DISC

MOTOR

M2

SLIDE

MOTOR

SW4

M

M

+
–

+

–

TR–
TR+
FO+
FO–

GND

PD
VR
LD

CNP3A

6
5
4
3
2
1

CNS2B

1

2

3
4
5

6

7
8

CNS3B

6

5

4

3

2

1

CNS2A

1
2
3
4
5
6
7
8

TR–
TR+
FO+
FO–

GND

PD
VR
LD

6
5
4
3
2
1

CNP2

1
2
3
4
5
6
7
8

CNS3A

6
5
4
3
2
1

CNP3

SP+
SP–
SL+
SL–
PU-IN

R1
10

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

2.5V

C36

100/16

+B

C3
1/50

5V

64

VCC1

FIN2

1
2

REF

FIN1

REF

E

3
4

F
TB

REF

5

TE–

6

TE

7

REF

8

TESI

9

REF

SCI

10

TH
TA

11
12

TD–
TD

13

+

–

GEN

REF

JP

14

+

–

TO

15

16

FD

R17 33K

C11

0.1

R18 15K

R19
1K

VREF

2.5V

1

2.5V

2

0V

3

2.5V

4

2.5V

5

2V

6

2V

7

0V

8

0V

9

0V

10

0V

11

2V

12

2V

13

2.5V

14

2.5V
15

0V

16

4.7V

17

0V

/SPIN/SLIDE DRIVER

R46
560

4.2V

0V

2.2V

61 62 63

LDS

BHI

LDO

–
+

–

RF

+

–

–

+

+

+
–

HIST.COMP

SHOCK;WCOMP

REF

REF

+
–

+
–

+

–

IC3 M56748FP

FOCUS/TRACKING

FE1
REF

–

VCR

+

–
+

R23
10K

–
+

VCR

BAL

+
–

REF

+
–

WCOMP

JP

+–

REF

FSC

TO

GEN

+

REF

–

+
–

GEN

FD–

18 19

2.5V

R24
47K

STAND

BY

TSD

+

–

FA

2.5V

FOF

FA–

20 21

2.5V

R25

1.5K

REF

+
–

17

1CH

CH2

C34 0.33/50

C33 0.47/50

1V

1V

59

60

PHI

LF2

REF

VCR

+
–

VCR

IC1
LA9241M
SERVO AMP.

REF

TGL1

GL

THDL

THD

REF

REF

+

–

+

REF

SP

AGND

FE

FE–

23

22

24

2.5V

0V

2.5V

C13

330P

C16

R26

0.0047

82K

R27 39K

C14

0.01

0V

36

0V

35

0V

34

2.5V

33

+

2.5V

-

32

1.8V

31

1.8V

30

0V

29

0V

28

0V

27

0V

26

2V

25

2V

CH3 CH4

24

2.5V

23

2.5V

–

22

2.5V

+

21

4.7V

20
19

0.7V

C32 0.01

2.5V

58

VR

+

–
–

+

VCC

+

-

+

­PSTR

S.Q.R

+

–

–

SPOF

SPI

25 26

2.5V

R28 10K

0.47/50

C30 0.1/50

C31 220/6.3

2.5V

57

VCC

REFI
+
–

DEF

HFL

DRF

REF

JP

REF

SP–

SPG

2.5V

2.5V

C17

0.001
R30

6.8K

R29 56K

R31

1.2K

C18

R48
10K

0V

5V

56

VCC2

+

–

+
–

SPO

27

2.5V

R32 10K

0V

54 55

FSS

DRF

FEBAL
FOSTA
TOSTA
2FREQ
LASER
FSTA
8/12CM
SLOF

JP–

JP+
CV–

CV+

REF

TO

C19 1/50

52

53

CE

SLOF

OR

SLEO

28

2.5V

C20

R33 1.2K

4V4V0V

CL

DAT

LATCH

REF

SLOF

SLOF

+
–

REF

SLD

29

2.5V

47/16

R34 22K

0V

2.4V

49 50 51

CLK

DEF

CLK
CE

CL

DAT

P-ON RES

RF

+
–

30

C21

0.0033

R35 220K

+

–

SL–

31 32

2.5V

THLD

REF

SLC

SL+

2.5V

DGND

RFS–

RFSM

SLOF

TOFF

R36

R37
82K

JP–

NC
TBC
FSC

SLI

+

CV+
CV–

HFL
TES

TGL
JP+

0V

220K

–

R45

4.7K

C29

4.7/50

0V

48
47
46

2.5V

0V

45

2.5V

44

C27

0.001

2.5V

43

R40

5.6K

2.5V

42

C24

2.2P

41

1.6V
0V

HF

40

0V

39

5V

38

0V

37

0V

36

5V

35

5V

34

0V

33

GND

C35
1/50

1SS133

D2

RL104AD3RL104A

D1

C26

0.033

R41
47K

C25
27P

R43
56K

C28

0.1

R44
33K

R42
47K

R39

1K

R38

C23

470

0.0027

C22
220P

D4

RL10

CD MOTOR PWB-K

G

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 19.

1

23456

Figure 24 SCHEMATIC DIAGRAM (1/16)

– 24 –