AIWA CDC492 Service Manual

CD-C492/492C

Manufactured under license from Dolby Laboratories. "Dolby", "Pro Logic" and the double-D symbol are trademarks of Dolby Laboratories. Confidential Unpublished Works. ©1992-1997 Dolby Laboratories, Inc. All rights reserved.

● QSOUND and the QLogo are registered trademarks of QSound Labs, Inc.

● QSound is protected under US Patent Nos. 5,105,462 and 5,208,860 and foreign counterparts.

SERVICE MANUAL

No.S5829CDC492//

CD-C492 CD-C492C

CP-C492, CP-SW492, CENTER(GBOXS0010AWM1) and SURROUND(GBOXS0011AWM1) speaker system Constibute CD-C492/CD-C492C.

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

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............................................................................................. 26

TROUBLESHOOTING ..................................................................................................................................................... 55

FUNCTION TABLE OF IC................................................................................................................................................ 59

FL DISPLAY..................................................................................................................................................................... 70

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

SHARP CORPORATION

CONTENTS

– 1 –

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

Page

CD-C492/492C

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

(RRMCG0141AWSA)

Front speaker wire × 2

(92L3191SW49210)

FM antenna × 1

(92LFANT1746A)

Center speaker wire × 1

(92L3191SW49210)

Sub woofer wire × 1

(92L3191SW49210)

AM loop antenna × 1

(QANTL0006AWZZ)

Surround speaker wire × 2

(92L291-0068)

– 2 –

General

Power source: AC 120 V, 60 Hz Power consumption: 200 W Dimensions: Width; 10-5/8" (270 mm)

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

Weight: 23.2 lbs. (10.5 kg)

Amplifier section

Output power: Front speakers; 40 W minimum

RMS per channel into 8 ohms, from 60 Hz to 20 kHz with no more than 10 % total harmonic distortion. Center speaker; 40 W (1 kHz, 10 % T.H.D.) Surround speakers; 40 W per channel (1 kHz, 10 % T.H.D.) Sub woofer; 40 W (80 Hz, 10 % T.H.D.)

Output terminals: Front speakers; 8 ohms

Center speaker; 8 ohms Surround speakers; 8 ohms Sub woofer; 8 ohms Monitor; 1 Vp-p/75 ohms Headphones; 16 - 50 ohms (recommended; 32 ohms)

Input terminals: DVD1 (Digital); Optical

DVD2 (Digital); Coaxial VCR1/AUX1; 500 mV/47 kohms VCR2/AUX2; 500 mV/47 kohms DVD1/VCR1; 1 Vp-p/75 ohms DVD2/VCR2; 1 Vp-p/75 ohms

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: 100 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: 80 W Impedance: 8 ohms Dimensions: Width; 8-11/16" (220 mm)

Height; 12-1/2" (316 mm) Depth; 11-3/16" (284 mm)

Weight: 7.5 lbs. (3.4 kg)/each

Center speaker section

Type: 2-way, 4-3/4" (120 mm) woofer

and 2" (50 mm) tweeter

Maximum input power: 80 W Impedance: 8 ohms Dimensions: Width; 10-5/8" (270 mm)

Height; 5-5/8" (142 mm) Depth; 8-11/16" (220 mm)

Weight: 4.0 lbs. (1.8 kg)

Surround speaker section

Type: 2-way, 4" (100 mm) woofer and

2" (50 mm) tweeter

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

Height; 5-5/16" (134 mm) Depth; 9-1/2" (240 mm)

Weight: 3.1 lbs. (1.4 kg)/each

Sub woofer section

Type: 6-1/2" (160 mm) woofer Maximum input power: 80 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)

CD-C492/492C

SPECIFICATIONS

CP-C492

GBOXS0010AWM1

GBOXS0011AWM1

CP-SW492

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

– 3 –

CD-C492/492C

NAMES OF PARTS

Front panel

1. Disc Tray

2. Disc Number Selector Buttons

3. Disc Skip Button

4. Open/Close Button:

5. LFE Indicator

6. Left Surround Speaker Indicator

7. Left Front Speaker Indicator

8. Centre Speaker Indicator

9. Sub Woofer Indicator

10. Right Front Speaker Indicator

11. Dolby Pro Logic Indicator

12. Dolby Virtual Indicator

13. (CD) Disc Number Indicator

14. (TAPE) Direction Indicator

15. (TAPE) Reverse Mode Indicator

16. Surround Signal Indicator

17. Right Surround Speaker Indicator

18. Dolby Digital Indicator

19. (CD) Play Indicator

20. (CD) Repeat Play Indicator

21. (CD) Pause Indicator

22. (TAPE) Record Indicator

1

7

5 6

234

91011

8

16 1718 19

23 2425 26

12 13 14

21

20

22

15

27

28

23. Timer Record Indicator

24. Timer Play Indicator

25. Sleep Indicator

26. Extra Bass Indicator: X-BASS

27. (CD) Random Play Indicator

28. (CD/TUNER) Memory Indicator

29. (TUNER) FM Stereo Indicator:

30. (TUNER) FM Stereo Mode Indicator: ST

31. Spectrum Analyzer Indicator

32. Function Selector Buttons

33. Extra Bass Button

34. Volume Control

35. Power Button

36. Headphone Socket

37. Surround Mode Selector Buttons

38. Equalizer Selector/Demo Mode Button

29

30

31

32 33 34

35

36

37

38

– 4 –

39. Clock Button

40. Sleep Button

41. Reverse Mode Button: ( )

42. CD Pause Button:

43. Jog Dial

44. (CD/TAPE) Stop Button:

45. Record Pause Button:

46. Menu Button

47. Item Button

48. Timer Button

49. Memory Button

50. Clear Button

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

52. (TAPE 2) Reverse Play Button:

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

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

55. (TAPE) Normal Edit Button

56. (TAPE) High Edit Button

39 40 41 42 43

49 50 51 52 53 54 55 56

48

44 45 46 47

CD-C492/492C

57. (TAPE 1) Cassette Compartment

58. (TAPE 2) Cassette Compartment

57 58

– 5 –

CD-C492/492C

Rear panel

1. DVD 1 Digital Input Socket (Optical)

2. DVD 2 Digital Input Socket (Coaxial)

3. DVD 1/VCR 1 Video Input Socket

4. DVD 2/VCR 2 Video Input Socket

5. Video Output Socket

6. CD Digital Output Socket (Optical)

7. VCR 1/AUX 1 Input Socket

8. VCR 2/AUX 2 Input Socket

9. FM 75 ohms Aerial Terminal

10. Aerial Earth Terminal

11. AM Aerial Terminal

12. AC Power Lead

13. Front Speaker Terminals

14. Centre Speaker Terminals

15. Surround Speaker Terminals

16. Sub Woofer Terminals

1

2

67 8

3

4

5

9

10 11

CP-C492

Front speakers

1. Super Tweeter

2. Tweeter

3. Woofer

4. Bass Reflex Duct

5. Speaker Terminals

1 2

4

3

12

RATED SPEAKER IMPEDANCE : 8 OHMS MIN. IMPEDANCE NOMINALE DU HAUT-PARLEUR : 8 OHMS MINIMUM

14

13

RATED SPEAKER IMPEDANCE : 8 OHMS MIN. IMPEDANCE NOMINALE DU HAUT-PARLEUR :

8 OHMS MINIMUM

15 16

5

CP-SW492

Sub woofer

1. Woofer

2. Bass Reflex Duct

3. Speaker Terminals

1

3

2

– 6 –

1 2

3

GBOXS0010AWM1

1

2

3

Centre speaker

1. Tweeter

2. Woofer

3. Speaker Terminals

GBOXS0011AWM1

Surround speakers

1. Tweeter

2. Woofer

3. Speaker Terminals

Remote control

CD-C492/492C

1. Remote Control Transmiter LED

2. Surround Mode Selector Buttons

3. Sub Woofer Level Control Buttons: /

4. Setup Up/Down Buttons: /

5. Menu Button

6. Item Button Tuner control section

7. Preset Up/Down Buttons: / CD control section

8. Track Up/Cue Button: /

9. 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. Stop Button:

20. (TAPE 1) Play Button: (TAPE 2) Forward Play Button:

21. (TAPE 2) Fast Wind Buttons: /

2

3

8

9

10

22 23

24 25

17

1

45

15 16

18 19

7

6

11 12

13 14

20

21

26

Common section

22. Extra Bass Button

23. Equalizer Mode Button

24. Function Selector Buttons

25. Power Button

26. Volume Control Buttons

27. Dimmer Button

– 7 –

27

CD-C492/492C

SETTING THE CLOCK

1

Press the POWER button to enter the stand-by mode.

2

Press the CLOCK button.

3

Within 5 seconds, press the MEMORY 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 (see page 37).

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 in the stand-by mode:

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 37.

➁ Perform 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

POWER

EQUALIZER

/DENO

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 button to turn the power off.

2

Press the POWER button while holding down the

button and the EQUALIZER/DEMO button.

WHEN "PROTECT" APPEARS

Caution:

● The operation explained above will erase all data stored

in memory including clock and timer settings, and tuner

and CD presets.

OPERATION MANUAL

– 8 –

CD-C492/492C

MINI COMPONENT SYSTEM

Quick Guide/Guía rápida

CD-C492

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

Center speaker

wire x 1

Cable de altavoz

central x 1

Sub woofer wire x 1

Cable de altavoz de

subgraves x 1

Surround speaker

wire x 2

Cable de altavoz de

sonido perimétrico x 2

Batteries are not included.

Las pilas no están incluidas.

Surround speaker

Altavoz de sonido perimétrico

Wall

Pared

23-5/8” - 35-7/16”

(60 - 90 cm)

60 - 90 cm

+

-

+

15

8” - 20’ (0.2m - 6m)

0,2m - 6m

4

Connecting the system /

Conexión del sistema

AC 120 V, 60 Hz

120 V de CA, 60 Hz

TV

Video

Audio (Optical)

Audio

RRL

L

Video

Audio (Coaxial)

Audio (Analog)

DVD

VCR

How to switch between an audio signal and a

video signal

Cómo cambiar entre una señal de audio y una

señal de vídeo

BUTTON/

BOTÓN

“DVD 1”

AUDIO OUTPUT/

SALIDA DE AUDIO

VIDEO OUTPUT/

SALIDA DE V?DEO

DISPLAY/

VISUALIZACIÓN

“VCR 1”

“DVD 2”

“VCR 2”

DVD 1

VCR 1/AUX 1

DVD 2

VCR 2/AUX 2

DVD 1/VCR 1

DVD 2/VCR 2

DVD 1

VCR 1

DVD 2

VCR 2

– 9 –

CD-C492/492C

Red

Rojo

1

2

3

AM Loop Antenna

Antena de cuadro de AM

FM Antenna

Antena de FM

SUB WOOFER

ALTAVOZ DE

SUBGRAVES

Red

Rojo

Black

Negro

RIGHT

DERECHO

LEFT

IZQUIERDO

RIGHT

DERECHO

LEFT

IZQUIERDO

Red

Rojo

Black

Negro

Red

Rojo

Black

Negro

CENTER

SPEAKER

ALTAVOZ

CENTRAL

FRONT SPEAKER

ALTAVOZ FRONTAL

SURROUND SPEAKER

ALTAVOZ DE SONIDO

PERIMÉTRICO

Red

Rojo

Black

Negro

Red

Rojo

Black

Negro

Red

Rojo

Black

Negro

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

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

– 10 –

CD-C492/492C

6

Listening to a tape /

Audición de una cinta

7

Listening to the radio /

Audición de la radio

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 .

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

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 .

– 11 –

CD-C492/492C

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-C492/492C

STEP REMOVAL

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

2 Side Panel 1. Screw ..................... (B1) x4 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 Dolby PWB 1. Flat cable ............... (D1) x2 13-1

5 Tuner PWB 1. Socket.................... (E1) x1 13-1

6 Rear Panel 1. Screw ..................... (F1) x10 12-2

7 Main PWB 1. Flat cable ............... (G1) x2 13-2

8 Front Panel 1. Flat wire ................. (H1) x2 13-2

9

Heat Shink Cover

10

Power Amp. PWB

11

Power Supply PWB

12 Display PWB 1. Knob....................... (M1) x2 13-4

13 CD Switch PWB 1. Screw ..................... (N1) x3 13-4

14 Headphones 1. Screw ..................... (P1) x1 13-4

15 Tape Mechanism 1. Screw ..................... (Q1) x6 13-4

16 Turntable 1. Screw ..................... (R1) x1 13-5

17 Disc Tlay 1. Screw ..................... (S1) x2 13-5

18 CD Player Unit/ 1. Screw ..................... (T1) x1 13-5

CD Servo PWB 2. Socket .................... (T2) x4

19 CD Changer 1. Screw ..................... (U1) x4 14-1

Mechanism

20 CD Mechanism 1. Screw ..................... (V1) 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. Socke ..................... (D2) x1

3. Screw ..................... (D3) x10

2. Screw ..................... (E2) x5

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

3. Socket...................... (G3) x4

4. Screw....................... (G4) x3

2. Screw...................... (H2) x2

1. Screw ..................... (J1) x4 13-2

1. Socket .................... (K1) x3 13-3

2. Screw ..................... (K2) x6

1. Screw ..................... (L1) x6 13-4

2. Nut.......................... (M2) x2

3. Screw ..................... (M3)x12

2. Cover ..................... (R2) x1

2. Guide ..................... (S2) x2

PROCEDURE

FIGURE

(G2) x1

CD-C492/492C

( A1 ) x2 ø3 x12mm

( B1 ) x2 ø3 x8mm

Side Panel (Right)

( B1 ) x4 ø3 x8mm

( C4 ) x3

A

CD Player Unit

( D2 ) x1

( C3 ) x1 ø3 x8mm

( F1 ) x10 ø3 x8mm

Rear Panel

(C2) x1

Pull

LOCK LEVER

Figure 12-1

CD Tray Cover

Rear Panel

Figure 12-2

Top Cabinet

( A1 ) x2 ø3 x12mm

Side Panel (Left)

( B1 ) x2 ø3 x8mm

Hook ( C1) x3

1

1 2

( C2 ) x1

Front Panel

Main PWB

Tuner PWB

< A >

Note 1:

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

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.

Figure 12-3

– 12 –

CD-C492/492C

(D3) x4 ø3x10mm

(D1) x1

(G4) x1 ø3 x10mm

(D2) x1

(D3) x6 ø3x10mm

(E2) x1 ø3x10mm

(K2)x5 ø3x10mm

Rear Panel 

Front Panel

(H1)x1

Dolby PWB

(D1) x1

(G3) x2

Tuner PWB

Figure 13-1

(G2) x1

(G1) x2

(E1) x1

(G4) x2 ø3x10mm

Front Panel

(E2) x4 ø3 x10mm

(G3) x2

Main PWB

CD Switch PWB

Front Panel

(N1)x3 ø3x10mm

(M3)x12 ø3x10mm

Tape Mechanism

(Q1)x6 ø3x10mm

( R2 ) x1

(M2)x1

Lug Wire

Figure 13-4

( R1 ) x1 ø3 x10mm

(M1)x2

Washer

(M2)x1

Display PWB

Headphones PWB

Open

(P1)x1

ø3x10mm Cassette Holder (Left/Right)

(J2)x4 ø3x10mm

Heat Shink Cover

Power Supply PWB

( K1 ) x1

Figure 13-2

(L1)x4 ø4x8mm

( K2 ) x1 ø3x10mm

Power Amp. PWB

(L1)x1 ø3x10mm

( K1 ) x2

( H1 ) x1

( H2 ) x1 ø3x10mm

( S1 ) x1 ø3 x10mm

( S2 ) x1

CD Player Unit

( T2 ) x2

Turntable

Disc Tray

( S1 ) x1 ø3 x10mm

( S2 ) x1

Figure 13-5

( T1 ) x1 ø3 x10mm

CD Servo PWB

(L1)x1 ø3x10mm

Figure 13-3

( T2 ) x2

CD Player Unit

Figure 13-6

– 13 –

CD-C492/492C

( U1 ) x4

ø3 x12mm ( V1 ) 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-C492

STEP REMOVAL

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

2. Baffle Board ........... (A2) x1

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

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

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

CD Mechanism

PROCEDURE

FIGURE

Net

(A1)x1

Tweeter

CP-C492

Tweeter

Baffle Board

(A2)x1

Woofer

Screw driver

Super

(A5)x2

ø3x10mm

Tweeter

CP-SW492

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.

(A3)x2

ø3x10mm

(A4)x4

ø4x16mm

Woofer

Figure 14-2

CP-SW492

Net ( A1 ) x1

( A3 ) x4 ø4 x16mm

Woofer

– 14 –

( A2 ) x1

Figure 14-3

Screwdriver

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3, 18 and 20 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-C492/492C

Loading / Up / Down Motor

Motor PWB

( A1 ) x2 ø2.6 x5mm

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.

( B1 ) x2 ø2.6 x6mm

Shaft ( B2 ) x1

Stop Washer ( B3 ) x1

Pickup

CD Mechanism Gear ( B4 ) x1

Figure 15-2

– 15 –

CD-C492/492C

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

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.

Pin 13 of IC303

Pin 21 of IC303

VRM1

FAS SW

SWM1

TAPE SPEED

Figure 16-1

TUNER PWB

IC302

20

TP301

AM IF

T351

1

Q342

B C E

VR351

VCO

Figure 16-3 ADJUSTMENT POINTS

IC303

13

TP302

FM DETECTION

– 16 –

21

T352

G

D

S

L303

FM BAND COVERAGE fL

T304 T302

AM BAND COVERAGE fL

FET : 2SK19 or 2SK54

10 kΩ

Figure 16-2

IC301

T301

FM IF

AM TRACKING fL

L302

FM RF

1

TO FREQUENCY COUNTER

SO301 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. <CD> + <EQ> + <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

Tracking on the spot. SERVO OFF PLAY

) or ( ) key.

Tracking on the spot. SERVO ON PLAY

IL is not performed.

CD-C492/492C

<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-C492/492C

EXPLANATION OF DOLBY DIGITAL

DOLBY DIGITAL

When you connect this unit to a DVD player which is playing

DVD 1 /VCR 1

Type of Dolby digital signal

There are different types of Dolby digital signals. The type of Dolby digital signal being input into this unit can be checked in the display.

DVD 2 /VCR 2

DVD 1 /VCR 1

DVD 2 /VCR 2

a disc with the trademark, you can enjoy realistic, powerful sound by playing back the recorded signal through 6 speakers with the sound coming from the front left, front right, center, surround left, surround right and sub woofer speakers.

To listen to a disc using the Dolby Digital mode:

1

Connect a DVD player.

2

Press the DVD 1/VCR 1 or DVD 2/VCR 2 button to select "DVD 1" or "DVD 2".

3

Start the DVD player.

Note:

● When the Dolby Digital surround mode is being used, the equalizer will be set to FLAT.

Display Channels available Display Channels available

Normal PCM playback Front (L, R) + surround

Center only (monaural) Front (L, R) + center

Front (L, R) (When the surround mode is set to Normal or Phantom, sound will also be heard from the surround speakers.)

Front (L, R) + surround (monaural)

● If a low frequency sound effect (Low Frequency Effect) contains a Dolby digital signal, "LFE" will light in the display. When this "LFE" is lit, low frequency signals will be output from the sub woofer.

(L, R)

Front (L, R) + center + surround (monaural)

Front (L, R) + center + surround (L, R)

SURROUND EFFECT CONTROL

This product allows you to enjoy 4 surround modes.

Normal mode:

When you play a sound source that has the (5.1 chan nels) or trademarks, you can enjoy surround sound using all 6 speakers.

Phantom mode:

When you play a sound source that has the or trademarks, you can enjoy surround sound using 5 speakers, but not the center speaker.

Virtual Dolby Surround:

You can enjoy a three-dimensional surround stereo image using just the 2 front speakers.

Enhanced Virtual Surround:

You can enjoy surround sound, using only the 2 front speakers, but this mode increases the three-dimensional stereo image effect even more.

– 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 ON—OFF SWD2 JOG ON—OFF SWD3 X-BASS ON—OFF SWD4 PRE EQ ON—OFF SWD5 MENU ON—OFF SWD6 ITEM ON—OFF SWD12 TUNING UP/CUE ON—OFF SWD13 STOP ON—OFF SWD14 NORMAL EDIT ON—OFF SWD15 REC. PAUSE ON—OFF SWD16 REC/PAUSE ON—OFF SWD17 F-PLAY ON—OFF SWD23 QSOUND ON—OFF SWD26 VIRTUAL 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

• 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.

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 DVD/VIDEO 1 ON— OFF SWD40 DVD/VIDEO 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-C492/492C

KTA1266 GR KTA1270Y KTA1271 Y KTA1273 Y KTC3199 GR KTC3203 Y KRA102 M KRA107 M

FRONT

VIEW

E C B

(S)(G) (D)

(1) (2) (3)

KRA109 M KRC102 M KRC104 M KRC107 M 2SC535 C 2SD468 C 2SC2878 A

FRONT

VIEW

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

2SD2012 2SB 1375

SLR325 MG SLR325 VR KL052 UL SLR505 MC LMKD515 B

Figure 19 TYPES OF TRANSISTOR

– 19 –

FRONT

VIEW

FRONT VIEW

KV1236Z23

CD-C492/492C

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

10.0 V

7

JP-

0.5ms

8

3 1

0.50 V JP

0.5ms

1.00 V

9

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

10.0 V

7

JP50ms

0.50 V

8

JP 50ms

1.00 V

9

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

8

0.50 V JP

0.5ms

9

1.00 V TE

50ms

10.0 V

6

JP+ 50ms

10.0 V

7

JP50ms

0.50 V

8

JP 50ms

1.00 V

9

TE

REVIEW

12

0.5s 100mV SLD

1

– 20 –

TO MAIN SECTION

+B1

6

5

SW2

MECHA UP

SW3

9

8

GND (D)

MECHA UP

GND (D)

9

8

10 10

SW1

OPEN/CLOSE

DISC No.

7

5

6

DISK NO.

OPEN/CLOSE

GND (D)M–M+

7

5

6

M3

LOADING

M

3

4

3

4

SOLM1

2

1

GND (M)

2

1

CNS10

CNP10

TO MAIN

SECTION

CD-C492/492C

+5V

+B1

Q1 Q52

XL1

IC81

8

Q91

31

XVDD RVDD

LVDD

VDD

VVDD

DOUT

4144

6

27

CONT4

CONTROL

SERVO/SIGNAL

LC78622K

XOUT

XIN

64 45 3623 43

VCC1

IC2

EFMO

EFMIN

9

101220

~

324043

JP–

IC1

CLV+

CV+

~

SLC

JP–

44

SL1

LA9241M

62

LD0

SERVO AMP.

FIN2

FIN1EF

2

3

1

4

3

DRIVER

TA7291S

LORDING MOTOR

1

9

24

25

CONT2

CONT1

265853

~

RES. CQCK. COIN

SQOUT. RWC. WRQ

CE

5352515431302923271615

DAT CL

DRF SL+ SL–

SLD NC SPO FD TO

+12V(+B5)

Q93

Q91

CL, DAT, SELIAL CONTROL/CE

SL+. SL–. DRF

3222

5

6

+B1

20

7

34

272628

29

IC3

DRIVER

M56748FP

242530

13

12

PU-IN SW

35

36

10 11

98

31

7

Q81 +7.3V (B1)

REGULATOR

+4.3V

PICKUP UNIT

FOCUS COIL

TRACKING COIL

M1

M2

DISC

MOTOR

SLIDE

MOTOR

M

Figure 21 BLOCK DIAGRAM (1/5)

– 21 –

SW4

PICKUP IN

CD-C492/492C

C

LOW PASS FILTER &

DIFFERENTIAL AMP

+B7

ANAROG RCH

ANAROG LCH

DIGITAL

DVD2

DIGITAL

FROM CD UNIT

IN

DVD2

IN

2

A-GND

+B7

2 1

A-GND

LOW PASS FILTER &

DIFFERENTIAL AMP

GP1F38R

ICA12

NJM4580M

8

1

4

8

4

ICA11

NJM4580M

TOS

ICA14

TC74HCU04

INVERTER

IN

1 4

IN

13

IN

6

AINR– AINL–

IN

6

ICA15

14

OUT

7

OUT

7

6

8

10

AINL+ OUT

AINR+

3

AINR–

4

AINL+

5

AINL–

6 2 8

18 19 20 22 25

A-GND

ICA16

TC74HCU15

SWITCH

IN

3

IN

4

IN

5 6

11

1

6

ICA13

1

7

~

13

PWDA

PWAD

23

24

16 17 15 11 12 13

A/D,D/A

AK4520A

14

CONVERTER

27 26

21

10

9

+B13+B9

14

D-OUT

7 9 2

+B13

16

15

DEM0 DEM1 SCK CLK CLK2L/R SL/SR IN D-OUT

LS OUT RS OUT



DGTL2

DGTL1

DGTL2

V1/V2

D-IN

83

61

4

CLK2L/R OUT

CLK2OUT

SL/SR OUT

97

92

91

79

85

62

36

60

95

86

S CL CL

SCK2IN

66

2

94

78

VIDEO1 IN

VIDEO2 IN

MONITOR

OUT

+B13

QH51

+B7

D4-GND

ICH51

NJM2246M

SWITCH

1

3

7

+B7

5

2

4

8

V-GND

D4-GND

SWITCHING

QH53

QH52

SWITCHING

DGTL2

V1/V2

DGTL2

V1/V2

LS/RS

OUT

D3-GND

Figure 22 BLOCK DIAGRAM (2/5)

– 22 –

SSSOSCK SIDEMO1

DEMO0

AC3 RESET

SUB

ON/OFF

WOOFER

CD-C492/492C

AD RESET

+B9

SCK CLK CLK2L/R

SCK2IN

95

66

29

19

8

2

ZR38600

DOLBY AC-3 /5.1

MPEG2 AUDIO

DECORDER

94

86

48

78

90

5

44

37

GND

ICA18

12

6

PD

6

DEM0

12

DEM1

13

XT1

5

BICK

7 9

8

ICA19

1

3

10

LRCK

FL/FR

IN

D3-GND

PD

6

DEM0

87

70

SCK

SI

89

81

FL/FR OUT

80

54

WOOFER

93

84

CENTER

SUB OUT

SUB

WOOFER

ON/OFF

CENTER WOOFER

QA01

SSSORESET

68

53

65

30

35

17

34

VDD

55

82

3

59

67

71

45

DEM1

XT1 BICK LRCK

SUB

IN

12 13

5 7 9

8

1 3

D3-GND

ICA20

10

16 20 22

2

14

D/A

15

AK4321

24

CONVERTER

18 17

OUT

11

21

A-GND

+B9

16 20 22

2

14

D/A

15

AK4321

24

CONVERTER

18 17

11

21

A-GND

FL FR

CENTER

SUB

WOOFER

QA02

6

+B13

ICB01

NJM4580M

MIX AMP

OUT

L

1

R

SWITCHING

+B7

8

7

4

3 5

QA03

MIX

IN

SUB

WOOFER

OUT

A-GND

SUB

WOOFER

FL/FR

12 13

10

2 9

14

+B12

5

7

–B12

ICA21

NJM4580M

–15dB AMP

4 1

8

11

7

ICA22

BU4066BCE

SWITCH

8

4

–B12

+B7

SUB

WOOFER

5

IN

–B12

SUB

WOOFER

OUT

FL/FR

OUT

CENTER

OUT

Figure 23 BLOCK DIAGRAM (3/5)

– 23 –

+B12

+B13

VOLTAGE

REGURATER

VOLTAGE

REGURATER

QB01

VOLTAGE

REGURATER

UN-SWITCHED

–B6–B12

+B7

+B9

CD-C492/492C

C

7

O

SL

IN

SL OUT

TERMINAL

FM AM

SO301

ANTENNA

JR11

VCR/AUX1

FM BPF

BF301

AM RF

T202

A1064

AM ANT

1

FM FRONT END

2 3

L302

IC201

TA7358AP

5

4

FM RF

AM

OSC

T204

B1074

7

FM

OSC

OSC BUFF

8

FM OSC

L303

Q202

+B7

FM IF

T301

6

9

FMOSC

FM IF CF301

FM IF IN

1

AM MIX AM IF

AM IF

T351

FM/AM IF+MPX IC241

24 23227

AM+B

AM RF IN

AM OSC IN

+B7

T352

653

FM DET VCO

GND

VCC

LA1805

FM/AM DET OUT

15 111716

FM/AM

STEREO

MONO/ST

SWITCHING

MPX VCO ADJ

FM DET

MPX IN

Q342

VR351

132021

MO/ST

9

L

10

R

Q343

VOLTAGE

REGURATER

Q344

FM +B

+B7

X352

4.5MHz

AM IN

FM IN

16

221

20

7

FM

OSC

PLL CONTROLLER

15

TC72131

IC302

3

FM MONO/ST

10

11

4

5621

DICLCE

+5V

17

DO

FM +B

7

B.P.F

ICH11

2

SPE IN

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-B

FUNC-A

10 9

12

L

TUNER

1

R L

TAPE

VCR 1

VCR 2

14 5

R L

15

2

R L

11 4

R

-B10

L

21 27

R

7

16

+B10

+B2

MOTOR DRIVER

M

QL14

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

ICZ09 NJM4565D LINE AMP.

-B10

L

R

IN

5

3

+B10

4

8

71

OUT

R

L

L-OUT

R-OUT

C-OUT

L

R

19

18

20

I

QS

41

42

40

L-IN

R-IN

C-IN

-

REC

P.B

AC BIAS

T2 PH-IN

DRIVER

P.B

QK03 QK04

REC/PB

QK05 QK06

QK09

QK10

+B2

QL15

POP REDUCE

QK07 QK08

QK11

T2 PH-OUT

TA PUL

QL19

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

QK28 LK04

NOR/ HIGH

12

IC101

AN7345K

15

P.B.

H/N

T1/T2

PB MUTE

QK17 QK18

MUTING

P.B

4

L

21

R

5

20

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

REC/PB

SWITCHING SWITCHING

QK24

BAIS

QK26

TO AC-3

Figure 24 BLOCK DIAGRAM (4/5)

– 24 –

RIN

C-OUT

R

18 17

ICQ01

QS7777PF

QSOUND

42

44

C-IN

SL-IN

T2 CrO

TAPE SOL

HIGH SP

REC MUT

PB MUTE

REC MUTE

L-IN

R-IN C-IN

SL-IN SR-IN

SW-IN

SR-OUT

SL-OUT



16

45

SR-IN

+B7

T1 RUN

T2 RUN T2 A FP T2 B FP T1 CrO

CAM-SW TA MOT

FR SP

BIAS

TA R/P

T1/T2

PB EQ

REC EQ

17 16

11

9

8

6

31

15

+B7

VOLTAGE

REGURATER

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 71

70 69 58 56

VR ST

VR CLK

FUNC B

FUNC A

VR CLK

VR ST

VR DATA

41

40

39

31

L-OUT

32

R-OUT

C-OUT

33

ICZ10 M62446FP 6-ch VOL

IC04,06,08 NJM4565D

IN/OUT

FILTER

AMP

ICZ01

LC7522

G.E. VOL

IC03,05,07 NJM4565D

IN/OUT

FILTER

13 12

11

10

AMP

BYP

34 35

SW-OUT

36 30

5

42

16 17

1

14

15

SL-OUT SR-OUT

+B10

-B10

+B10

-B10

DOLBY SECTION

AD RES

SW ON/OFF

DIGITAL1

TU-SD

DIGITAL2

TU-DO

AC32RES 

IX0233AW

SYSTEM MICROCOMPUTER

53

DI

CLK2

TU CL

VR DATA

-B10 +B10 +B11

DI

CLK

+B10

-B10

+B11

VOLTAGE REGURATER

+B11

+B7

MO AR

AC

AC32SO

V1/V2

AC32SCK

DEM 1

DEM 0

97 98 6

COM

DAT

7

AC32SI

AC32SS

93 94 95 96

ICF01

82 24 262749 50 51 525463 64 65 66 76

75 74 73

FAN

QS2AC

QS2MO

H/P SW

POSISTOR

PROT

SP DET

FRONT RELAY

CENTER RELAY

QS2AR

S-MUTE

QP03 QP04 QP16

+B7

IN

L R

-B6

-B10

+B2

+B9

+B6

+B7

+B10

REGULATOR

+B8

TO CD UNIT

8

5 3

4

ICP11 NJM4565D LOW BOOST AMP.

-B6

-15V VOLTAGE

REGULATOR

QZ02

+4.6V

UN-SWITCHED

+5V(DOLBY)

+12V(MOTOR)

VOLTAGE

REGULATOR

+12V(ANALOG)

QZ01

VOLTAGE

+7.3V(CD)

OUT

7 1

L R

SCK

89

1078

9

STB

SCK

DAT

STB

RES

VDD

VSS

POWER

S-MUTE

S-W-MUTE

S-W RELAY

CENTER-MUTE

SURROUND-MUTE

SURROUND RELAY

C-MUTE

SR-MUTE

SW-MUTE

QP13 QP14

QP15

VOLTAGE

REGURATER

VOLTAGE

REGULATOR

Q903

VOLTAGE

REGULATOR

Q902 Q901

Q906 Q905

Q904 SWITCHING

VOLTAGE

REGULATOR

Q909 Q908

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

4.19MHz

17

SYSTEM STOP

27

CD O/C

86

CD U/D

85

CD DNO

84

POWER

POWER ON/STB

Q907

SWITCHING

L-IN

R-IN

C-IN

SL-IN

SR-IN

SW-IN

RXD01 REMOTE

SENSOR

29

RES

12

STB

1

DAT

95

COM

96

SCK

97

1

8 79 91

LEDD01~ LEDD28

+B3

+B4 (5V BACK UP)

+B4

RESET

QG01 OSC X201

POSISTOR

ICV01  STK407-250 POWER AMP.

-B

ICX01

STK407-250

POWER AMP.

-B

VOLTAGE

REGULATOR

Q911 Q910

7

+B

3

+B

3

10

12

18

10 12

18

~

4530

VSS

4

~

10

~

88

~

94

~

QG02 QG03 ZDF01

P.FAIL DET

5

7

1

5

+B-B

D991

D996~D999

D992~D995

5

53

~

~~

5250

47

~

ICD01

IX0233AW FL DRIVER u CONTROLLER

VDD VEE

46

90

72

18

+B2

+B6

+5V

MEMORY BACK UP

+B3

FAN

H/P SW

SP DET

RELAY

PROT

QV13 QV14 QY11

L-OUT

9

8

R-OUT

201

C-OUT

SL-OUT

9

8

SR-OUT

20

SW-OUT

Q951

VF1 (AC)

FD01

FL DIPLAY

73

75

71

~

138915

51

14

SWD01

JOG SW

-VP

UNSWITCH +B2

QX13 QX14 QY51

F995

10A

F996

10A

VOLTAGE

REGULATOR

VF2

VP



(AC)

21

26

27

28

SWD02

QV18 QV19

QX51

RLYX11 RLYY51 RELAY

F998

1.6A

F997

2.5A



~

KEY IN

TO CD UNIT

QV22 QY12

RLYV11 RLYY11

RELAY

QX16

QY52

QY12

T991

POWER

TRANSFORMER

CD-C492/492C

1

T.F

F1

2

F1 F2

62 57

F2

+B6

QV20 QV21

VF1

(AC)

VF2

(AC)

KEY MATRIX

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

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 25 BLOCK DIAGRAM (5/5)

– 25 –

CD-C492/492C

C37

7

0

S

A

CNS1B

K

2200P

1M

MON

1M 2200P

E A B F

B

C

D

LT0H30M1

TR+ FO+

FO– TR–

ACTUATOR

LD

K E B

A F C

GND

CNS1A

5 4 3 2 1

K

1

A

2

B

3

E

4

F

5

CNP1

K

5

E

4

A

3

B

2

F

1

TR–

1

TR+

2

FO+

3

FO–

4

GND

5

PD

6

VR

7

LD

8

PICKUP UNIT

E

CNS2B

CNS2A

TR–

1

TR+

2

FO+

3

FO–

4

GND

5

6

PD VR

7

LD

8

F

1 2 3 4 5 6

7

8

C15

0.01

PD

LD

CNP2

R2 1K

1.5V

C2

0.01

TE

C54

R11

6.8K R12

100

1K

R13

R14 27K

R16

3.3K

R21 22K

C12

0.1

TR– TR+ FO+ FO–

CD2GND

C1

47/16

Q1

4.2V

KTA1266 GR

9

C4

0.1 R9

100

R10

2.2K

0.001

C9

0.047

R15 12K

C10

180P

8

1K

R20

R22 22K

100/16

4.8V

R8

15K

0.033

C8

0.068

C36

2.5V

C5

C6

0.033 C7

0.1/50

2.5V

2.4V

2.5V

1/50

2.4V

2.5V

R19

R1 10

C3

0V

4.8V

VCC1

–

LDS

FIN2

1

–

REF

+

FIN1

2

–

REF

+

E

3

F

4

REF

TB

5

2.5V TE–

REF

6

TE

7

REF

2.5V TESI

8 9

SCI

2.5V

TH

10

–

NC

11 12

GEN

TD–

2.5V TD

13

REF

JP

14

TO

+

–

15 16

FD

FD–

17

R17

2.5V

33K

R18

C11

15K

0.1

1K

1

VREF

R24 47K

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

12

0V 2V

13

2.5V

14

2.5V

15

0V

16

4.7V

17

0V

18

C33

C34

0.33/50

0.47/50 C32

0.01 C31

220/6.3

560

R46

1V

4.2V

2.2V PHI

BHI

LDO

+

RF

FE1

–

+

REF

VCR

–

+

VCR

–

+

–

REF

+

JP

REF

+

–

TO

REF

+

GEN

–

REF

+

–

FA

FA–

20

19

18

2.4V

2.5V

R23

10K

C13

C14

0.01

IC3

M56748FP

FOCUS/TRACKING/SPIN

2.5V

VR

LF2

REF

VCR

–

VCR

+

LA9241M

+

–

+

TGL1

–

REF

GL

THDL

FSC

FOSTA

FE1

REF

GEN +

–

REF

+

–

REF

AGND

FE

FE–

SP

2423

22

21

0V

2.5V

330P

82K

R26

C16

0.0047

R27 39K

R25

1.5K

36

0V

35

0V

34

0V

33

2.5V 32

2.5V 31

1.8V 30

1.8V 29

0V

28

0V

27

0V

26

0V

25

2V

R48

24

2V

/SLIDE DRIVER

10K

23

2.5V 22

2.5V 21

2.5V 20

4.7V

19

0.7V

2.5V

REF1

+

–

+

DEF

– –

+

HFL

+

DRF

–

IC1

SERV

VCC

+

– +

–

FSTA

S.Q.R

THD

+

–

REF

+

–

SP–

SPI

SPG

26

25

2.5V

10K R28

R29 56K

R31

1.2K

C18

0.47/50

C30

REF

0.1/50

4.8V

VCC2

JP

2.5V

C17

R30

4.8V

10

SPO

27

0.001

6.8K

FSS

EFBAL FOSTA TOSTA 2FREQ

LASER FSTA

8/12CM SLOF

+

–

+

–

REF

SLEO

28

2.5V

R33

1.2K

4V4V0V

0V

2.4V

0V

DRF

C20

CE

DAT

CV– CV+ JP– JP+

JPCLO

SLOF

OR

REF

47/16

R34 22K

LATOH

SLOF

SLD

C19

R32

10K

CL

CE CL

+

–

2.5V

1/50

REF

29

49505152535455565758596061626364

0V

NC

48

R45

TBC FSC

+

–

SLC

–

TOFF

JP+

JP–

32

SLI

0V

C21

47 46

45 44

2.5V

43

2.4V

42

1.5V

41

40 39 38 37 36 35 34 33

R36

0.0033

220K

4.7K

C29

C28

4.7/50

0.1

2.5V

2.5V 0V

2.4V

C27

TP1

4.8V

4.8V 0V

6

HF

4.8V 0V

0V

0.001

R40

5.6K C24

2.2P

R44

33K

C26

0.033 R41

R42

47K

C25

R39

27P

1K

R43 56K

R38

C23

470

0V

0.0027

C22 220P

CLK

DEF

2

DGND

REF

3

RFS–

+

RFSM

RF

CV+

4

CV–

SLOF

HFL

5

TES

TGL

+

–

SL–

SL+

30

31

2.2V

7

R35

220K

R37 82K

1/50

GND

C35

D1

1SS133

C5

0.0

12

D4

1N4004S

+B

D3

1N4004S

D2

1N4004S

+B

+

M1

M

DISC

M2

SW4

– +

M

–

IN

MOTOR

SLIDE

MOTOR

PICKUP

G

6 5 4 3 2 1

CNS3B

CNP3A

6 5 4 3 2 1

CNS3A

6 5 4 3 2 1

CNP3

6 5 4 3 2 1

SP+ SP– SL2+ SL2– CD2PUIN

CD MOTOR PWB-K

H

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

1

23456

Figure 26 SCHEMATIC DIAGRAM (1/20)

– 26 –

CNP12

WRQ(DSP)

RWC(DSP)

CO IN(DSP)

234

1

10K

R47

D2GND

RES(DSP)

CQ CK(DSP)

SQ OUT(DSP)

DRF (ASP)

6

5

7

CN

TO MA

P31

C29

ND

35

0

4.7/50

C26

0.033

R41 47K

C25 27P

R43 56K

C28

0.1

R44 33K

R42 47K

R39

1K

R38

470

1SS133

D4

1N4004S

0.0027

D1

C23

C22

220P

R47

10K

C57

0.001

C37

0.022

R57 1K R58 1K R59 1K

R61 1K

C39

0.047

0.047 R52 27K

R53 1.2K

11

R62 1K R63 1K

R51

3.3M R50

680

C40

R60

1K

C38

0.01

/CS

TEST5

TEST1

DEF1

0V

1

0V

TA1

2

0V

PDO

3

0V

VVSS

4

1.9V

ISET

5

4.8V

VVDD

6

0V

FR

7

0V

VSS

8

2.5V

EFMO

9

SLICE LEVEL

EFMIN

2.5V

CONTROL

10

0V

TEST2

11

CLV+

0V

12

CLV

CLV2

0V

DIGITAL SERVO

13

V/P

4.8V 14

HLF

0V

15

SERVO

TES

0V

COMMAND

16

TOFF

TGL

17

18 19 20 21 22 23 24 25 26 27 28 29

4.8V

IC2

LC78622K

SERVO/SIGNAL

CONTROL

C56

0.022 CD2LD2M–

+B

IC81

TA7291S

LOADING MOTOR DRIVER

0V

6.4V1V0V

6.5V

4 3 2 1

6

5

7

NC

3.9

C82

47/16

R83

C81

47/16

NC

4M

16M

/RES

TEST11

INTERFACE

VCO CLOCK

OSC CONTROL

SYNC-DETECT

EFM DEMODULATE

JP+

JP2

PCK

FSEQ

0V

2.5V

NC

R81

2.9V

0V

3.9K

8

9

R82

6.8K

C46

100P

COIN

RWC

/CQCK

SQOUT

WRQ

µ-COM

2Kx8 RAM

ERROR COERECT

FLAG CONTROL

EXTERNAL

OUTPUT

VDD

CONT1

CONT2

CONT3

CONT4

0V

0V0V0V

4.8V

R88 1K

R90 1K

R89 1K

CD2LD2M+

C45

C44

100P

NC

FSX

SFSY

SBCK

SUB-CODE

X-TAL

GENERATOR

CONT5

EMPH

30 31

NC

NC 0V

0V

Q51 KRC107 M 3

0V

1

0V

Q93

KRC102 M

3

0V

1

100P

NC

49505152535455565758596061626364

PW

4FS

DIGITAL

FILTER

DIGITAL

OUT

C2F

DOUT

NC

2.5V

4.8V

2

R80

6.8K

+B

12V

2

R86

2.2K

C47

100P

32

0V

KTA1271 Y

12V

C48

100P

EFLG SBSY

XVSS

XOUT

XVDD

MUTER

RVDD

1BIT DAC

LVDD MUTEL

TEST4

TEST3

NC

R54 330

10K

R87

XIN

RCHO RVSS

LVSS LCHO

Q91

12V

0V

D91

C49

100P

2.2V

48 47

0V

46

2.1V

45

2.2V

44

4.8V

43

4.8V

42

4.5V

41

2.0V

40

0V

39

0V

38

0V

37

4.5V

36

4.8V NC

35 34

0V

33

0V

R55

150

1SS133

SOL

M– M+

CD2D2NO

C53

0.022

330/6.3

+B

CNP10

C41 12P

C42 15P

R93 220

C83

C43

L61

0.82µH

C50

0.022

+B

SOL

1 2

GND(M) M–

3

M+

4

GND(D)

5

OPEN CLOSE

6

DISC NO.

7

GND(D)

8

MECHA UP

9

10

GND(D)

CD SERVO PWB-B

+B

XL1

D82

1SS133

D81

1SS133

Q52

KTC3203 Y

R66

R64

22

C52

100/16

330

C51

+5V

100/16

+7.3V

BI99

1

2

2 3

3

CNS99

CNS10

CNPR11

TO MAIN PWB

P28 3-C

BIM05

1

2

3

4

5

6

6 7 8 9

10

1 2 1

CNS5

CD-C492/492C

CD-GND

+7.3V

+12V

CNP11

+B

ZD61

MTZJ4.7B

+B

SOLENOID 2

LOCK

SENSOR PWB

–

M3 T/T UP/DOWN

M

LOADING

+

SW1 OPEN/ CLOSE

SW2 MECHA UP

SW3 DISC

2

NOMBER

TO MAIN PWB

1

P30 1-C

2

CNSF11

3

OP/CLOS

UP/DOWN

SLD+

9

SLD–

PUIN SW

11

10

DISC NO.

12 13

14

CNP12

WRQ(DSP)

RWC(DSP)

CO IN(DSP)

234

1

D2GND

RES(DSP)

CQ CK(DSP)

SQ OUT(DSP)

DRF (ASP)

8

6

5

7

CNSF12

TO MAIN PWB

P31 1-D

• The numbers 1 to 12 are waveform numbers shown in page 20.

7

8 9 10 11 12

Figure 27 SCHEMATIC DIAGRAM (2/20)

– 27 –