Sharp CD-C478 User manual

– 1 –
CD-C478/478C
No.S6848CDC478//
CONTENTS Page
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)
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.
SERVICE MANUAL
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
Manufactured under license from Dolby Laboratories Licens-
ing Corporation.
DOLBY, the double-D symbol and "PRO LOGIC" are
trademarks of Dolby Laboratories Licensing Corporation.
CP-C478, CP-SW478, CENTER(GBOXS0015AWM1)
and Rear (GBOXS0016AWM1) speaker system
Constibute CD-C478/CD-C478C

CD-C478/478C
– 2 –
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
pinchedorthathardwareisnotlodgedbetweenthechassis
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
havingareturnpathtothechassis(antenna,metalcabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.
AllcheckmustberepeatedwiththeAClinecordplugconnection
reversed.
Anyreading of0.3 voltRMS (thiscorresponds to0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
TEST PROBE
0.15 µ F
1.5k ohms
10W
VTVM
AC SCALE
ACCESSORIES
Remote control ×1
(RRMCG0155AWSA) FM antenna ×1
(92LFANT1746A) AM loop antenna ×1
(QANTL0006AWZZ)
Front speaker wire ×2
(92L3191SW49210) Sub woofer wire ×1
(92L3191SW49210)

– 3 –
CD-C478/478C
SPECIFICATIONS
CP-C478
CD-C478/478C
Specifications for this model are subject to change without prior notice.
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
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-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
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)
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
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)
GBOXS0015AWM1
GBOXS00116AWM1
CP-SW478

CD-C478/478C
– 4 –
NAMES OF PARTS
CD-C478/478C
1234
56
7
8
9
10 11 12
13 14 15 16 17
18
19
20 21 22
23
26 27 28 29
24 25
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
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

– 5 –
CD-C478/478C
30 35
38 39
31 32 33 34 36 37
40 41 42 43 44 45
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
1. (TAPE 1) Cassette Compartment
2. (TAPE 2) Cassette Compartment
12

CD-C478/478C
– 6 –
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
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
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
12
3
4
5
6
7 8 9 10
1
2
3
4
5
1
2
3

– 7 –
CD-C478/478C
GBOXS0015AWM1
GBOXS0016AWM1
1
2
1
2
Centre speaker
1. Woofer
2. Speaker Terminals
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
2
3
4
5 6
7
8
9
10
11
12
13
14
15 16
17 18 19 20
22
23
24
25
26
21
27
28

CD-C478/478C
– 8 –
OPERATION MANUAL
SETTING THE CLOCK
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.
(0:00 - 23:59)
"AM 12:00"→The 12-hour display will appear.
(AM or PM 12:00 - 11:59)
"AM 0:00" →The 12-hour display will appear.
(AM or PM 0:00 - 11:59)
●Note that this can only be set when the unit is first installed
or it has been reset..
5 Press the MEMORY 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 counterclock-
wise, 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 auto-
matically 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 counterclock-
wise, 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:
➀Press the MEMORY button.
➁Perform steps 6 - 9 above.
When the unit is on:
➀Press the CLOCK button.
➁Within 5 seconds, press the MEMORY button.
➂Perform 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:
➀Perform steps 1 and 2 in the section "RESETTING THE MI-
CROCOMPUTER", on page 28.
➁Perform steps 1 - 9 above.
POWER
CLOCK
Jog dial
MEMORY TUNING
( )
In this example, the clock is set for the
12-hour (AM 12:00) system.
0:00 AM 12:00 AM 0:00
2
3
4
5
6
7
8
9
RESETTING THE MICROCOMPUTER
Reset the microcomputer under the following condi-
tions:
●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.
POWER
EQUALIZER
/DENO

– 9 –
CD-C478/478C
MINI COMPONENT SYSTEM
Quick Guide/Guía rápida CD-C478
Remote control x 1
Controlador remoto x 1
2 “AA” batteries
Dos pilas “AA”
Remote sensor
Sensor remoto
3 Placing the speaker system / Situación de los altavoces
2 How to use the remote control / Empleo del controlador remoto
1 Check the supplied accessores / Compruebe los accesorios suministrados
FM antenna x 1
Antena de FM x 1
AM loop antenna x 1
Antena de cuadro de AM x 1
Front speaker wire x 2
Cable de altavoz frontal
x 2
Sub woofer wire x 1
Cable de altavoz de
subgraves x 1
Batteries are not included.
Las pilas no están incluidas.
Rear speaker
Altavoz posterior
Wall
Pared
23-5/8” - 35-7/16”
(60 - 90 cm)
60 - 90 cm
+-
-
+
15
15
8” - 20’ (0.2m - 6m)
0,2m - 6m
4 Connecting the system / Conexión del sistema
123
AM Loop Antenna
Antena de cuadro de AM
FM Antenna
Antena de FM
SUB WOOFER
ALTAVOZ DE
SUBGRAVES
Red
Rojo
Black
Negro
CENTER
SPEAKER
ALTAVOZ
CENTRAL
Red
Rojo
Black
Negro
Red
Rojo
Red
Rojo
Black
Negro
With a white line
Con la línea blanca
With a white line
Con la línea blanca
With a white line
Con la línea blanca
AC 120 V, 60 Hz
120 V de CA, 60 Hz
RIGHT
DERECHO
LEFT
IZQUIERDO
Red
Rojo
Black
Negro
FRONT SPEAKER
ALTAVOZ FRONTAL
RIGHT
DERECHO
LEFT
IZQUIERDO
REAR SPEAKER
ALTAVOZ POSTERIOR

CD-C478/478C
– 10 –
5 Listening to a CD / Audición de discos CD
Press the POWER button to
turn the power on.
Pulse el botón POWER para
conectar la alimentación.
1
Press the CD button.
Pulse el botón CD.
Press the OPEN/CLOSE button to
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.
2
3
Press the OPEN/CLOSE button
to close the disc tray.
Pulse el botón OPEN/CLOSE
para cerrar la bandeja del disco.
4
Press the button.
Pulse el botón .
5
Adjust the volume level.
Turn the VOLUME control clockwise
to increase the 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.
6
To stop the playback
Para detener la reproducción
Press the button.
Pulse el botón .
VOLUME
6 Listening to a tape / Audición de una cinta
Load a cassette into the cassette
compartment.
Inserte un casete en el
compartimiento del casete.
3
Press the POWER button to
turn the power on.
Pulse el botón POWER para
conectar la alimentación.
1
Press the TAPE button to select
"TAPE 1" or "TAPE 2".
Pulse el botón TAPE para
seleccionar "TAPE 1" o "TAPE 2".
2
TAPE 2
TAPE 1
Press the button.
Pulse el botón .
4
To stop the playback
Para detener la reproducción
Press the button.
Pulse el botón .

– 11 –
CD-C478/478C
8 Recording from CDs / Grabaciones de discos CD
Press the POWER button to
turn the power on.
Pulse el botón POWER para
conectar la alimentación.
1
Press the TAPE (1 2) button to
select the "TAPE 2".
Pulse el botón TAPE (1 2) para
seleccionar "TAPE 2".
2
3
Press the REVERSE MODE button
to select the reverse mode.
Pulse el botón REVERSE MODE
para seleccionar el modo de
inversión.
4
Press the CD button and load the
desired disc.
Pulse el botón CD y coloque el
disco deseado.
5
Press the NORMAL EDIT button.
Pulse el botón NORMAL EDIT.
6
•••••
One side / Una cara
•••••
Both side / Ambas caras
TAPE 2
Load a cassette into the
TAPE2 cassette compartment.
Inserte un casete en el
compartimiento del
casete de TAPE 2.
To stop the recording
Para detener la grabación
Press the button.
Pulse el botón .
7 Listening to the radio / Audición de la radio
Press the TUNING ( / ) button
to tune in to the desired station.
Pulse el botón TUNING ( / )
para sintonizar la emisora
deseada.
3
Press the POWER button to
turn the power on.
Pulse el botón POWER para
conectar la alimentación.
1
Press the TUNER (BAND) button
to select "FM ST" ,"FM"or "AM".
Pulse el botón TUNER (BAND) para
seleccionar "FM ST", "FM", o "AM".
2

CD-C478/478C
– 12 –
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
the CD cover, and close.
(Note 1)
2. Hook....................... (C1) x3
3. Hook....................... (C2) x2
4. Screw ..................... (C3) x1
5. Socket .................... (C4) x3
4 Tuner PWB 1. Socket .................... (D1) x1 13-1
2. Screw ..................... (D2) x5
5 Rear Panel 1. Screw ..................... (E1) x11 12-2
................................... 13-1
6 Main PWB 1. Flat cable ............... (F1) x2 13-1
2. Flat wire .................
(F2) x3
3. Socket...................... (F3) x3
4. Screw....................... (F4) x3
7 Front Panel 1. Flat wire ................. (G1) x1 13-2
2. Screw...................... (G2) x2
8 Heat Shink Cover 1. Screw ..................... (H1) x4 13-2
9 Power Amp. PWB 1. Socket .................... (J1) x3 13-2
2. Screw ..................... (J2) x6
10 Power Supply PWB 1. Screw ..................... (K1) x6 13-3
11 Display PWB 1. Knob....................... (L1) x2 13-4
2. Nut.......................... (L2) x1
3. Screw ..................... (L3)x12
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
2. Cover ..................... (Q2) x1
16 Disc Tlay 1. Screw ..................... (R1) x2 13-5
2. Guide ..................... (R2) x2
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
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3.Takeoffnylon bands orwireholderswhere they needto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,besure to rearrangetheleadswherethey were
before disassembling.
4. Take suffcient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 12-2
Figure 12-3
CD-C478/478C
STEP REMOVAL PROCEDURE FIGURE
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 12-1
CD-C478/478C
LOCK
LEVER
CD Tray Cover
CD Player
Unit
( E1 ) x10
ø3 x8mm
( C3 ) x1
ø3 x8mm
Hook
( C1) x3
( C2 ) x1
( C4 ) x3
Rear Panel
Main PWB
Front Panel
1
1
2
A
Tuner PWB
Pull
(C2) x1
( B1 ) x2
ø3 x8mm
( B1 ) x4
ø3 x8mm ( B1 ) x2
ø3 x8mm
Top Cabinet
Side Panel
(Right)
Rear Panel
Side Panel
(Left)
( A1 ) x2
ø3 x12mm
( A1 ) x2
ø3 x12mm

– 13 –
CD-C478/478C
Figure 13-1
Figure 13-2
Figure 13-3
Figure 13-4
Figure 13-5
Figure 13-6
(D2) x4
ø3 x10mm
(E1) x1
ø3 x10mm
(D2) x1
ø3x10mm
(F4) x2
ø3x10mm
(F4) x1
ø3x10mm
(F3) x2
(F1) x2
(F2) x2
(F2) x1
(F3) x1
(D1) x1
Rear Panel
Main PWB
Tuner PWB
Front Panel
(H1)x4
ø3x10mm
(J2)x5
ø3x10mm
Front Panel
( J2 ) x1
ø3x10mm ( G2 ) x1 ø3x10mm
( J1 ) x2
( J1 ) x1
( G1 ) x1
Heat Shink Cover Power Amp. PWB
(K1)x4
ø4x8mm
(K1)x1
ø3x8mm
(K1)x1
ø3x10mm
Power Supply PWB
(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
( S1 ) x1
ø3 x10mm
( S2 ) x2
( S2 ) x2 CD Player Unit
CD Servo PWB

CD-C478/478C
– 14 –
CP-C478
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
STEP REMOVAL PROCEDURE FIGURE
CP-C478
Figure 14-2
CP-SW478
Figure 14-3
CP-SW478
1 Sub woofer 1. Net.......................... (A1) x1 14-3
2. Duct Panel ............. (A2) x1
3. Screw ..................... (A3) x4
STEP REMOVAL PROCEDURE FIGURE
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.
Be careful when installing the CD changer mechanism.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
Figure 14-1
( A3 ) x4
ø4 x16mm
Net
( A1 ) x1
( A2 ) x1 Screwdriver
Woofer
( T1 ) x4
ø3 x12mm
( U1 ) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base
Screw driver
Woofer
Net
(A1)x1
Front Panel
(A2)x1
Tweeter
Woofer
Tweeter
Super
Tweeter (A5)x2
ø3x10mm
(A3)x2
ø3x10mm
(A4)x4
ø4x12mm

– 15 –
CD-C478/478C
How to remove the pickup (See Fig. 15-2)
1.Removethescrews(B1) x 2 pcs., toremovetheshaft(B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 15-2
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. 15-1)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 15-1
( 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-C478/478C
– 16 –
TUNER PWB
IC302
AM IF
T351
TP301
T352
VR351
VCO
FM BAND
COVERAGE fL
L303 T301
FM IF
T304 T302
L302
IC301
SO301
ANTENNA
TERMINAL
AM
GND
FM 75 ohms
FM RF
FM
DETECTION
AM BAND
COVERAGE fL AM
TRACKING fL
Q342
B C E
20
IC303
21
13
1
TP302
1
MECHANISM SECTION
•Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
•Torque Check
Torque Meter
Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 100 g.cm
Fast forward: TW-2231 — 50 to 100 g.cm
Rewind: TW-2231 — 50 to 100 g.cm
Specified
Value
Adjusting
Point Instrument
Connection
Test Tape
Normal MTT-111 VRM1 3,000 ± Speaker
speed 30 Hz terminal
(Load
resistance:
8 ohms)
ADJUSTMENT
Specified Value
Tape 1
•Tape Speed
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
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
Test Stage Frequency Frequency
Display Setting/
Adjusting
Parts
Instrument
Connection
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
•FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Band — 87.50 MHz L303(fL): *1
Coverage 3.7 V ± 0.1 V
RF 98.00 MHz 98.00 MHz L302 *2
(10-30 dB)
Test Stage Instrument
Connection
Frequency Frequency
Display Serring/ Adjusting
Point
•Detection
Signal generator: 10.7 MHz, FM sweep generator
Detection 10.7 MHz 98.00 MHz T352 Input: Pin 1 of
IC303
Output: TP302
IF 10.7 MHz 98.00 MHz T301(Turn Input: Pin 1 of
the core of IC301
transformer Output: TP302
T301 fully
counter-
clookwise.)
Instrument
Connection
Test
Stage Adjusting
Parts
Frequency
Display
Frequency
Adjusting
Parts Instrument Connection
Frequency
Display
Frequency
•VCO Frequency
* 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.
Pin 13 of IC303 Pin 21 of IC303
D
G
S
10 kΩ
TO FREQUENCY
COUNTER
FET : 2SK19 or 2SK54
Figure 16-2
98.00 MHz 98.00 MHz VR351* Pin 13, Pin 21
(60 dB) and ground
of IC303
Figure 16-3 ADJUSTMENT POINTS
Figure 16-1
VRM1
TAPE
SPEED
FAS
SW
SWM1
TAPE MECHANISM PWB

– 17 –
CD-C478/478C
TEST MODE
2
1
TO
TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST
Figure 17-2 Figure 17-3
2
1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
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.
CD SECTION Figure 17-1
Note:
Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 17-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the ( ) or ( ) key.
<MEMORY>
LASER ON
<PLAY> key input Press <STOP> key. Stop
TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
<MEMORY>
Tracking on the spot.
SERVO ON PLAY STOP
2
0.1s
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
1
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
Figure 17-4
IL is not performed.
<STOP>

CD-C478/478C
– 18 –
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)
SP out L-ch Almost no output (only omitting component)
(TMV01) R-ch Almost no output (only omitting component)
(TMX11) SP out C-ch Input signal is output.
(TMX11) SP out S-ch Almost no output (only omitting component)
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)
EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD
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←
Outline
• Namely, two speakers are connected in parallel to one
amplifier.
•IntheProLogicBYPASSmodetheamplifierforC-ch(center
channel)andtheamplifierforS-ch(surroundchannel)arein
MUTE state. The SP output is cut.
• 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.
•InthePhantommodeofProLogic ONmodethe amplifierfor
C-ch is in MUTE state, so that the SP output is cut. The
amplifierforS-ch(surround)isin operative state, so that the
SP output appears
•State of element output and terminal output in specific mode
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
Output point Phantom mode
(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 Almost no output (only omitting component)
(TMV01) R-ch Almost no output (only omitting component)
(TMX11) SP out C-ch Almost no output (only omitting component)
(TMX11) SP out S-ch Input signal is output.
Output point Phantom 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 SP cut, no output
(TMX11) SP out S-ch Input signal is output.
•Accordingly,ifyouwanttooutputsignalwaveformtoC-chSP
out, give the same phase input into L-ch/R-ch INPUT in the
Pro Logic Normal mode.
Ifoneofchannelsreceivesinput,C-chdoesnotoutput. Only
L-ch or R-ch outputs.
•IfyouwanttooutputsignalwaveformtoS-chSPout,youcan
use either Normal mode or Phantom mode. However, 180°
reverse phase input must be given to L-ch/R-ch INPUT.

– 19 –
CD-C478/478C
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
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
•The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
1. In the tuner section,
( ) indicates AM
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
•Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
NOTES ON SCHEMATIC DIAGRAM
•Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
•Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolyticcapacitor,theexpression“capacitance/withstand
voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
•Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
Figure 19 TYPES OF TRANSISTOR
KTA1266 GR
KTA1270Y
KTA1271 Y
KTC3199 GR
KTC3203 Y
KRA102 M
KRA109 M
KRC102 M
KRC104 M
KRC107 M
2SC535 C
2SD468 C
2SC2878 A
2SD2012
2SB1375
SLR325 MG
SLR325 VR
KL052 UL
SLR505 MC
LMKD515B
KV1236Z23
(S)(G) (D)
(1) (2) (3)
E C B
FRONT
VIEW
FRONT
VIEW
B C E
(D)(G)(S)
(3) (2) (1)
FRONT
VIEW
FRONT VIEW

CD-C478/478C
– 20 –
WAVEFORMS OF CD CIRCUIT
3
5ms
0.50 V
IC1 20 F.E
1
5ms
5.0 V
IC1 54 DRF
STOP PLAY
FOCUS SERCH
1
3
5
4
2
6
7
8
9
10
11
3
4
5
6
7
8
9
6
7
8
10
11
12
9
6
7
8
9
12
0.5ms
1.00 V
HF
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
1
2
3
CUE
0.5ms
1.00 V
HF
1
2
3
0.5ms
5.0 V
HFL
0.5ms
5.0 V
TES
REVIEW
50ms
10.0 V
JP+
CUE
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
REVIEW
50ms
10.0 V
JP+
50ms
10.0 V
JP-
50ms
0.50 V
JP
50ms
1.00 V
TE
0.5ms
10.0 V
JP+
0.5ms
10.0 V
JP-
0.5ms
0.50 V
JP
0.5ms
1.00 V
TE
PLAY
20ms
1.00 V
SPO
NORMAL DISC
TN0=01
20ms
2.00 V
CLV+
PLAY
TCD-712 (140mm)
TN0=01
50ms
1.00 V
SPO
50ms
2.00 V
CLV+
PLAY
TCD-712
5s
100mV
SLD
1
0.5s
100mV
SLD
1