Sharp CP-K491, CP-SW491, GBOXS0010AWM3, GBOXS0011AWM3 Service Manual

– 1 –

CD-K491W

No.S0883CDK491W/

CONTENTS

Page

SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2

VOLTAGE SELECTION..................................................................................................................................................... 2

SPECIFICATIONS ............................................................................................................................................................. 3

NAMES OF PARTS ........................................................................................................................................................... 4

OPERATION MANUAL ...................................................................................................................................................... 7

DISASSEMBLY.................................................................................................................................................................. 8

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 11

ADJUSTMENT ................................................................................................................................................................. 12

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 16

TYPES OF TRANSISTOR AND LED................................................................................................................................16

BLOCK DIAGRAM ........................................................................................................................................................... 17

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 22

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 52

TROUBLESHOOTING ..................................................................................................................................................... 53

FUNCTION TABLE OF IC................................................................................................................................................ 57

FL DISPLAY..................................................................................................................................................................... 68

REPLACEMENT PARTS LIST/EXPLODED VIEW

CD-K491W

• 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

CD-K491W mini component system consisting of CD-K491W mini component system, CP-K491, CP-SW491, centre (GBOXS0010AWM3) and surround (GBOXS0011AWM3) speaker system.

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.

CD-K491W

– 2 –

SAFETY PRECAUTION FOR SERVICE MANUAL

WARNINGS

THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES AGAINST EXPOSURE TO THE LASER BEAM.

1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITDOUT A COMPACT DISC IN POSITION AND THE

PICK-UP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT LOOK INTO THE PICK-UP LENS.

2-THE LASER POWER OUTPUT OF THE PICK-UP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY

PRE-SET BEFORE SHIPMENT.

DO NOT ATTEMPT TO RE-ADJUST THE LASER PICK-UP UNIT DURING REPLACEMENT OR SERVICING. 3-UNDER NO CIRCUMSTANCES STARE INTO THE PICK-UP LENS AT ANY TIME. 4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE

SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen. VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.

QACCA0001AW00

VOLTAGE SELECTION

The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.

Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

QACCE0008AW00

QACCJ0003AW00

QACCL0005AW00

92LPLUG027

92LPLUG155A

CAUTION

● This Mini Component System is classified as a CLASS 1 LASER product.

● The CLASS 1 LASER PRODUCT label is located on the rear cover.

● Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

As the laser beam used in this compact disc player is harmful to the eyes, do not attempt to disassemble the cabinet. Refer servicing to qualified personnel only.

Laser Diode Properties

Material: GaAIAs Wavelength: 780 nm Emission Duration: continuous Laser Output: max. 0.6 mW

CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.

ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.

VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE. ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT INSTRUMENT. ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.

QACCB0006AW00

– 3 –

CD-K491W

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

CD-K491W

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

SPECIFICATIONS

CP-K491

CP-SW491

GBOXS0010AWM3

GBOXS0011AWM3

● General

Power source: AC 110/127/220/230 - 240 V,

50/60 Hz

Power consumption: 200 W Dimensions: Width; 270 mm (10-5/8")

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

Weight: 10.5 kg (23.2 lbs.)

● Amplifier section

Output power: PMPO; 2,000 W (total)

Front speakers;

MPO; 142 W (71 W + 71 W)

(10 % T.H.D.)

RMS: 80 W (40 W + 40 W)

(10 % T.H.D.)

Centre speaker;

MPO; 71 W

(10 % T.H.D.)

RMS: 40 W

(10 % T.H.D.)

Surround speakers;

MPO; 142 W (71 W + 71 W)

(10 % T.H.D.)

RMS: 80 W (40 W + 40 W)

(10 % T.H.D.)

Sub woofer;

MPO; 71 W

(10 % T.H.D.)

RMS: 40 W

(10 % T.H.D.)

Output terminals: Front speakers; 8 ohms

Centre 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: DVD 1 (Digital); Optical

DVD 2 (Digital); Coaxial VCR 1/AUX 1; 500 mV/47 kohms VCR 2/AUX 2; 500 mV/47 kohms DVD 1/VCR 1; 1 Vp-p/75 ohms DVD 2/VCR 2; 1 Vp-p/75 ohms Microphone 1/2; 1 mV/4.7 kohms

● Tuner section

Frequency range: FM; 88 - 108 MHz

SW2; 9.5 - 21.85 MHz SW1; 3.2 - 7.3 MHz MW; 531 - 1,602 kHz

● Cassette deck section

Frequency response: 50 - 14,000 Hz (Normal tape) Signal/noise ratio: 55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/

playback)

Wow and flutter: 0.15 % (WRMS)

● Compact disc player section

Type: 3-disc multi-play compact disc

player

Signal readout: Non-contact, 3-beam semi-

conductor laser pickup

D/A converter: 1-bit D/A converter Frequency response: 20 - 20,000 Hz Dynamic range: 100 dB (1 kHz)

● Front speaker section

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

50 mm (2") tweeter and super tweeter

Maximum input power: 80 W Rated input power: 40 W Impedance: 8 ohms Dimensions: Width; 220 mm (8-11/16")

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

Weight: 3.4 kg (7.5 lbs.)/each

● Centre speaker section

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

and 50 mm (2") tweeter

Maximum input power: 80 W Rated input power: 40 W Impedance: 8 ohms Dimensions: Width; 270 mm (10-5/8")

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

Weight: 1.8 kg (4.0 lbs.)

● Surround speaker section

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

50 mm (2") tweeter

Maximum input power: 80 W Rated input power: 40 W Impedance: 8 ohms Dimensions: Width; 200 mm (7-7/8")

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

Weight: 1.4 kg (3.1 lbs.)/each

● Sub woofer section

Type: 160 mm (6-1/2") woofer Maximum input power: 80 W Rated input power: 40 W Impedance: 8 ohms Dimensions: Width; 220 mm (8-11/16")

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

Weight: 3.8 kg (8.4 lbs.)

CD-K491W

– 4 –

NAMES OF PARTS

CD-K491W

■ Front panel

1. Disc Tray

2. Disc Number Selector Buttons

3. Disc Skip Button

4. Open/Close Button

5. Left Front Speaker Indicator

6. LFE Indicator

7. Centre Speaker Indicator

8. Right Front Speaker Indicator

9. Dolby Pro Logic Indicator

10. Dolby Virtual Indicator

11. Left Surround Speaker Indicator

12. Surround Signal Indicator

13. Sub Woofer Indicator

14. Right Surround Speaker Indicator

15. Dolby Digital Indicator

16. (CD) Disc Number Indicator

17. (TAPE) Direction Indicator

18. (CD) Play Indicator

19. (CD) Repeat Play Indicator

20. (CD) Pause Indicator

21. (TAPE) Record Indicator

22. (TAPE) Reverse Mode Indicator

23. Spectrum Analyzer Indicator

24. (TUNER) FM Stereo Indicator

25. (TUNER) FM Stereo Mode Indicator

26. Karaoke Maker Indicator

27. Timer Record Indicator

28. (CD) Random Play Indicator

29. Extra Bass Indicator

30. Timer Play Indicator

31. Sleep Indicator

32. (CD/TUNER) Memory Indicator

33. Function Selector Buttons

34. Surround Mode Selector Buttons

35. Equalizer Selector/Demo Mode Button

36. Extra Bass Button

37. Volume Control

38. On/Stand-by Button

39. Headphone Socket

40. Karaoke Maker Switch

41. Microphone Sockets

42. Microphone Level Controls

43. Digital Echo Control

1

234

5

6

7

89

10

11

1213 14

15

16

17

18 192021 22

23

24

25

26

27

28

29

30

31

32

33

36 37

38

39 41 43

34 35

40

42

– 5 –

CD-K491W

62 63

VIDEO OUT

MONITOR

SPAN

SELECTOR

FM/MW(kHZ)

50/9

100/10

1

234

5

67

8

10 11

13

15 16

17 18

9

12

14

44 45

46 47 48 49 50 51

52

53 54 55

56

57 58 59 60

61

■ Rear panel

44. Clock Button

45. Sleep Button

46. Reverse Mode Button

47. CD Pause Button

48. Jog Dial

49. (CD/TAPE) Stop Button

50. Record Pause Button

51. Menu Button

52. Item Button

53. Timer Button

54. Memory Button

55. Clear Button

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

57. (TAPE 2) Reverse Play Button

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

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

60. (TAPE) Normal Edit Button

61. (TAPE) High Edit/Beat Cancel Button

62. (TAPE 1) Cassette Compartment

63. (TAPE 2) Cassette Compartment

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. Span Selector Switch

10. 75 Ohm FM Aerial Socket

11. Aerial Earth Terminal

12. SW1/SW2/MW Aerial Terminal

13. AC Voltage Selector

14. AC Power Lead

15. Front Speaker Terminals

16. Centre Speaker Terminals

17. Surround Speaker Terminals

18. Sub Woofer Terminals

CD-K491W

– 6 –

GBOXS0010AWM3

GBOXS0011AWM3

CP-K491 CP-SW491

Front speakers

1. Super Tweeter

2. Tweeter

3. Woofer

4. Bass Reflex Duct

5. Speaker Terminals

Sub Woofer

1. Woofer

2. Bass Reflex Duct

3. Speaker Terminals

Centre speaker

1. Tweeter

2. Woofer

3. Speaker Terminals

Surround speakers

1. Tweeter

2. Woofer

3. Speaker Terminals

1 2

3 4

5

1

2

3

1 2

3

1

2

3

1

2

3

4

5

6

7

8 9

10

11 12

13 14

15 16

17

18 19 20

21

22 23 24

25

26 27

■ Remote control

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

● Common section

22. Extra Bass Button

23. Equalizer Mode Button

24. Function Selector Buttons

25. On/Stand-by Button

26. Volume Control Buttons

27. Dimmer Button

– 7 –

CD-K491W

OPERATION MANUAL

SETTING THE CLOCK

1

Press the ON/STAND-BY 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 42).

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 anticlockwise,

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 anticlockwise,

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 lead 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 lead 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 42.

➁ Perform steps 1 - 9 above.

CLOCK

ON/

STAND-BY

MEMORY

TUNING

( )

Jog dial

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

SPAN

SELECTOR

FM/MW(kHz)

50/9

100/10

(Continued)

■FM/MW interval (span)

The International Telecommunication Union (ITU) has established

that member countries should maintain either a 10 kHz or a 9

kHz interval between broadcasting frequencies of any MW sta-

tion. The illustration shows the 9 kHz interval zones (regions 1

and 3), and the 10 kHz interval zone (region 2).

Before using the unit, set the SPAN SELECTOR switch (on the

rear panel) to MW tuning interval (span) of your area.

To change the tuning zone:

1 Press the ON/STAND-BY button to enter the stand-by mode.

2 Set the SPAN SELECTOR switch to "50/9" for 9 kHz MW

interval (50 kHz FM interval), and "100/10" for 10 kHz MW

interval (100 kHz FM interval).

3 Press the ON/STAND-BY button whilst 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.

RESETTING THE MICROCOMPUTER

ON/

STAND-BY

EQUALIZER

/DEMO

Reset the microcomputer by performi ng 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 ON/STAND-BY button to enter the stand-by

mode.

2

Press the ON/STAND-BY button whilst 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.

(Continued)

■Remote control

● When inserting or removing the batteries, push them towards

the battery terminal.

● Installing the batteries incorrectly may cause the unit to mal-

function.

Notes concerning use:

● Replace the batteries if control distance decreases or operation

becomes erratic.

● Periodically clean the transmitter LED on the remote control

and the sensor on the main unit with a soft cloth.

● Exposing the sensor on the main unit to strong light may in-

terfere with operation. Change the lighting or the direction of

the unit.

● Keep the remote control away from moisture, excessive heat,

shock, and vibrations.

15

0.2 m - 6 m

(8" - 20')

CD-K491W

– 8 –

1 Top Cabinet 1. Screw ..................... (A1) x4 8-1

2 Side Panel 1. Screw ..................... (B1) x8 8-1

(Left/right)

3 CD Player Unit/ 1. Turn on the power supply, 8-2

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 8-2,9-1

4 Dolby PWB 1. Flat cable ............... (D1) x2 9-1

2. Socket .................... (D2) x1

3. Screw ..................... (D3) x12

5 Tuner PWB 1. Socket.................... (E1) x1 9-1

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

6 Rear Panel 1. Screw ..................... (F1) x11 8-2

................................... 9-1

7 Main PWB 1. Flat cable ............... (G1) x2 9-1

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

(G2) x3

3. Socket...................... (G3) x5

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

8 Karaoke PWB 1.Screw ...................... (H1) x3 9-2

9 Front Panel 1. Flat wire ................. (J1) x1 9-2

2. Screw...................... (J2) x2

10

Power Amp. PWB

1. Socket .................... (K1) x3 9-2

with Heat Sink 2. Screw ..................... (K2) x6

11

Power Supply PWB

1. Screw ..................... (L1) x6 9-3

12 Display PWB 1. Knob ....................... (M1) x2 9-4

2. Nut.......................... (M2) x1

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

13 CD Switch PWB 1. Screw..................... (N1) x3 9-4

14 Headphones 1. Screw ..................... (P1) x1 9-4

15 Tape Mechanism 1. Open the cassette Lid.

2. Screw ..................... (Q1) x6 9-4

16 Turntable 1. Screw ..................... (R1) x1 9-5

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

17 Disc Tlay 1. Screw ..................... (S1) x2 9-5

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

18 CD Servo PWB 1. Screw ..................... (T1) x1 9-6

2. Socket .................... (T2) x4

19 CD Changer 1. Screw ..................... (U1) x4 10-1

Mechanism

20 CD Mechanism 1. Screw ..................... (V1) x1 10-1

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. 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.

Figure 8-2

Figure 8-3

CD-K491W

STEP REMOVAL

PROCEDURE

FIGURE

Note 1:

How to open the changer manually. (Fig. 8-3)

1. 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 8-1

CD-K491W

( 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

CD Tray Cover

CD Player Unit

( F1 ) x10 ø3 x8mm

( C3 ) x1 ø3 x8mm

Hook ( C1) x3

( C2 ) x1

( C4 ) x2

Rear Panel

Main PWB

Front Panel

1

2

Tuner PWB

Pull

(C2) x1

LOCK LEVER

– 9 –

CD-K491W

Figure 9-1

Figure 9-2

Figure 9-3

Figure 9-4

Figure 9-5

Figure 9-6

(E2) x4 ø3 x10mm

(D3) x4 ø3x10mm

(F1) x1 ø3 x10mm

(D3) x8 ø3x10mm

(E2) x1 ø3x10mm

(G4) x2 ø3x10mm

(G4) x1 ø3x10mm

(G3) x2

(G1) x2

(D1) x1

(G2) x1

(G3)

@

x2

(G3) x1

(G2) x2

Rear Panel

Main PWB

Tuner PWB

Dolby PWB

Front Panel

(D2) x1

(C4) x1

(D1) x1

(E1) x1

(K2)x5 ø3x10mm

(H1)x1 ø3x10mm

(H1)x2 ø3x10mm

Front Panel

( K2 ) x1 ø3x10mm

( J2 ) x2 ø3x10mm

(K1 ) x2

( K1 ) x1

(J1 ) x1

Power Amp. PWB

Karaoke PWB

(L1)x4 ø4x8mm

(L1)x1 ø3x10mm

Power Supply PWB

(N1)x3 ø3x10mm

(Q1)x6 ø3x10mm

(P1)x1 ø3x10mm

Open

Headphones PWB

Display PWB

(M1)x2

(M2)x1

Washer

Tape Mechanism

Cassette Holder (Left/Right)

Front Panel

CD Switch PWB

(M3)x12 ø3x10mm

( S1 ) x1 ø3 x10mm

( R1 ) x1 ø3 x10mm

Turntable

Disc Tray

( R2 ) x1

( S2 ) x1

CD Player Unit

( T1 ) x1 ø3 x10mm

( T2 ) x2

CD Player Unit

CD Servo PWB

CD-K491W

– 10 –

CP-K491

1 Front Speaker 1. Net.......................... (A1) x1 10-2

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

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

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

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

STEP REMOVAL

PROCEDURE

FIGURE

CP-K491

Figure 10-2

CP-SW491

Figure 10-3

CP-SW491

1 Sub woofer 1. Net.......................... (A1) x1 10-3

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. Install the CD changer mechanism on the CD player base after the shift lever has been set in the highest position.

Figure 10-1

( U1 ) x4 ø3 x12mm

( V1 ) x1 ø2.6 x10mm

CD Changer Mechanism

CD Mechanism

Shift Lever

CD Player Base

Screw driver

Woofer

Net

(A1)x1

Baffle Board

(A2)x1

Tweeter

Super

Tweeter

(A5)x2

ø3x10mm

(A3)x2

ø3x10mm

(A4)x4

ø4x16mm

( A3 ) x4 ø4 x16mm

Net ( A1 ) x1

( A2 ) x1

Screwdriver

Woofer

– 11 –

CD-K491W

How to remove the pickup (See Fig. 11-2)

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 11-2

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3,16, 17, 18, 19 and 20 of the disassembly method to remove the CD mechanism.

How to remove the loading motor (See Fig. 11-1)

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

Figure 11-1

( 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-K491W

– 12 –

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 VRM01 3,000 ± Speaker speed 30 Hz terminal

(Load resistance: 8 ohms)

ADJUSTMENT

Specified Value

Tape 1

• Tape Speed

Figure 12

VRM01

TAPE SPEED

FAS SW

TAPE MECHANISM PWB

IF 450 kHz 1,602 kHz T351 *1 MW Band — 531 kHz (fL): T306 *2

Coverage 1.1 ± 0.1 V SW1 Band — 3.2 MHz (fL): T307 *2

Coverage 2.0 ± 0.1V SW1 Band — 7.3 MHz (fH): TC305 *2

Coverage 7.7 ± 0.2 V SW2 Band — 9.5 MHz (fL): T308 *2

Coverage 2.1 ± 0.1V SW2 Band — 21.85 MHz (fH): TC304 *2

Coverage 7.7 ± 0.2V MW 990 kHz 990 kHz T302 *1

Tracking SW1 3.9 MHz 3.9 MHz (fL): T303 *1

Tracking SW1 7.1 MHz 7.1 MHz (fH): TC303 *1

Tracking SW2 11.65 MHz 11.65 MHz (fL): T304 *1

Tracking SW2 21.45 MHz 21.45 MHz (fH): TC302 *1

Tracking

TUNER SECTION

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

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

Instrument

Connection

Frequency

Display

Setting/

Adjusting

Parts

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

– 13 –

CD-K491W

Figure 13 ADJUSTMENT POINTS

Instrument

Connection

• FM RF

Signal generator: 1 kHz, 40 kHz dev, FM modulated

Test Stage

Frequency

Display

Setting/

Adjusting

Parts

Band — 87.5 kHz (fL): LT02 *1 Coverage 3.7 ± 0.1 V

RF 98 MHz 98 MHz LT01 *2

10 - 30 dB

*1. Input: Antenna, Output: TP301 *2. Input: Anetnna, Output: Speaker Terminal

• Setting the Test Mode

Keeping the PAUSE button and TUNER button pressed, turn on POWER. Then, the frequency is initially set in the memory as shown in Table. Call it with the PRESET button to use it for adjustment and check of tuner circuit.

Preset

No.

1 87.50 MHz 6 531 kHz 11 3.2 MHz 16 9.5 MHz 2 108.00 MHz 7 1,602 kHz 12 7.3 MHz 17 21.85MHz 3 90.00 MHz 8 603 kHz 13 3.9 MHz 18 11.65 MHz 4 106.00 MHz 9 1,404 kHz 14 7.1 MHz 19 21.45 MHz 5 98.00 MHz 10 990 kHz 15 5.06 MHz 20 15.1 MHz

21 ~ 40

FM Preset

No.

MW

SW2

Preset

No.

SW1

Preset

No.

• FM Detection

Signal generator: 10.7 MHz, FM sweep

Test Stage

Instrument

Connection

Frequency

Display

Setting/

Adjusting

Parts

IF 10.7 MHz 98 MHz TT01 *1

(Turn the core of transformer TT01 fully counterclock wise)

*1. Input: Antenna, Output: TP301 *2. Input: Anetnna, Output: Speaker Terminal

*1. Adjust so that an output signal appears.

• FM Mute Level

Signal generator: 1kHz, 40 kHz dev., FM modulated

Frequency Adjusting

Parts

Instrument

Connection

Frequency

Display

98.00 MHz 98.00 MHz VR351 *1 Input: Antenna (25 dBµV) Output: Speaker

Terminal

TUNER PWB

AM IF

T351

VR351

LT02

TT01

T303TC303

T304TC302

T302

T308 TC304

T307 TC305

T306

LT01

MW Band Coverage

FM Mute Level

FM Band Coverage

MW Tracking

IC303

SW2 Tracking

fH fL

TP302

SW1 Band Coverage

fL fH

SW1 Tracking

fH fL

SW2 Coverage

fL fH

TP301

R357

FM IF FM RF

SO301 ANTENNA TERMINAL

CD-K491W

– 14 –

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 14-2

Figure 14-3

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. 14-2)

2. Tracking offset (Fig. 14-3)

3. E/F balance (tracking error balance) (Fig. 14-4)

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 14-1

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. <CD> + <EQ> + <POWER> TEST: CD operation test

• TEST mode

Function — CD test mode

Setting of TEST mode Indication of CD TST mode (Fig. 14-1) OPEN/CLOSE operation is manual operation. The pickup can be moved by using the (

) or ( ) key.

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 14-4

IL is not performed.

<STOP>

– 15 –

CD-K491W

DVD 1 /VCR 1

DVD 2 /VCR 2

DVD 1 /VCR 1

DVD 2 /VCR 2

When you connect this unit to a DVD player which is playing 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, centre, surround left, surround right and sub woofer speakers.

To listen to a disc using the Dolby Digital mode:

1

Connect a DVD player. (See page 39.)

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.

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.

Display Channels available Display Channels available

Normal PCM playback Front (L, R) + surround

(L, R)

Centre only (monaural) Front (L, R) + centre

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) + centre + surround (monaural)

Front (L, R) + surround (monaural)

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

● 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.

DOLBY DIGITAL

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 channels) 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 centre 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.

CD-K491W

– 16 –

SW1 OPEN/CLOSE ON—OFF SW2 MECHA UP ON—OFF SW3 DISC NUMBER ON—OFF SW4 PICKUP IN ON—OFF SW991 VOLTAGE SELECTOR 230-240V SWD01 VOLUME JOG ON—OFF SWD02 JOG ON—OFF SWD03 X-BASS ON—OFF SWD04 PRE EQ. ON—OFF SWD05 MENU ON—OFF SWD06 ITEM 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 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

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/STAND-BY ON—OFF SWD49 KARAOKE ON—OFF SWD50 DISC 1 ON—OFF SWD51 DISC 2 ON—OFF SWD52 DISC 3 ON—OFF SWD53 DISC SKIP ON—OFF SWD54 OPEN/CLOSE ON—OFF SWF02 SPAN SELECTOR 50/9 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 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.

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

Figure 16 TYPES OF TRANSISTOR AND LED

E

(S)

(1)

C (G) (2)

B

(D)

(3)

B (D) (3)

C

(G)

(2)

E (S) (1)

FRONT

VIEW

FRONT

VIEW

2SD2012 2SB1375

FRONT

VIEW

SLR325MG SLR325VR KL052UL SLR505MC LMKD515B

FRONT VIEW

KV1236Z23

2SC1845 F 2SC2236 Y 2SC2878 A 2SC2878 B 2SC535 C 2SD468 C KRA102 M KRA107 M KRC102 M

KRC104 M KRC107 M KTA1266 GR KTA1268 GR KTA1270 Y KTA1271 Y KTA1273 Y KTC3199 GR KTC3203 Y

3

2

1

FRONT

VIEW

KRA107 S KRC102 S KRC107 S

– 17 –

CD-K491W

Figure 17 BLOCK DIAGRAM (1/5)

8

27

1

2

3

4

5

98

6

7

20

12

13

242530

31

3222

34

35

36

10 11

272628

29

PU-IN SW

XL1

XIN

LD0

FIN2

JP–

CV+

SLC

SL1

FIN1EF

TO

FD

SPO

NC

SLD

SL–

SL+

DRF

CL

DAT

CE

VCC1

6

+5V

PICKUP IN

SW4

FOCUS COIL

TRACKING COIL

M1

DISC

MOTOR

M

M2

SLIDE

MOTOR

PICKUP UNIT

9

IC2

LC78622K

SERVO/SIGNAL

CONTROL

+B1

IC3

M56748FP

DRIVER

IC1

LA9241M

SERVO AMP.

6

1

9

5

+B1

+12V(+B6)

RES. CQCK. COIN

SQOUT. RWC. WRQ

~

CL, DAT, SELIAL CONTROL/CE

Q93

Q91

SL+. SL–. DRF

7

3

9

8

7

6

5

4

3

2

1

GND (D)

MECHA UP

GND (D)

DISK NO.

OPEN/CLOSE

GND (D)M–M+

GND (M)

9

8

7

6

5

4

3

2

1

CNP10

M

+5V

+B8

62

64 45 3623 43

31

24

25

10 10

265853

101220

324043

44

5352515431302923271615

4144

Q1

Q52

+4.3V

Q81 +7.3V (+B8)

REGULATOR

TO MAIN SECTION

IC81

TA7291S

LORDING MOTOR

DRIVER

XOUT

EFMO

EFMIN

CLV+

JP–

CONT2

CONT1

CONT4

DOUT

VVDD

VDD

LVDD

RVDD

XVDD

SW1

OPEN/CLOSE

SW2

MECHA UP

SW3

DISC No.

M3

LOADING

SOLM1

TO MAIN

SECTION

CNS10

CD-K491W

– 18 –

Figure 18 BLOCK DIAGRAM (2/5)

13

8

10

1 4

6

7

14

TOS

ICA14

GP1F38R

DVD2

DIGITAL

IN

ICA15

TC74HCU04

INVERTER

IN

DVD2

DIGITAL

IN

FROM CD UNIT

4

3

5 8

7

1

6

11

~

13

15

+B13

IN IN

IN

ICA16

TC74HCU15

SWITCH

61

D4-GND

14

13

12

11

D-OUT

DEM0 DEM1

16 17 15

SCK CLK CLK2L/R

83

79

91

D-IN

CLK2L/R OUT

92

CLK2OUT

97

9

5

8

6

85

62

60

36

4

D3-GND

D-OUT

D-IN

SL/SR OUT

SL/SR IN

ANAROG LCH

4

7

IN

2

1

6

7

IN

6

3 4 5 6

23

24

PWDA

PWAD

AINR+ AINR– AINL+ AINL–

2 8

18 19

20 22

25

1

7

9

10

21

+B13+B9

AINR– AINL–

AINL+

IN

TO MAIN SECTION

OUT

ICA13

AK4520A

A/D,D/A

CONVERTER

ANAROG RCH

ICA11

NJM4580M

LOW PASS FILTER &

DIFFERENTIAL AMP

A-GND

8

4

2 1

8

+B7

A-GND

+B7

ICA12

NJM4580M

LOW PASS FILTER &

DIFFERENTIAL AMP

27

LS OUT RS OUT

26

VIDEO1 IN

VIDEO2 IN

MONITOR

OUT

1

7

3

+B7

2

4

8

6

+B7

ICH51

NJM2246M

SWITCH

QH51

V-GND

LS/RS

OUT

DGTL2

V1/V2

16

+B13

2

DGTL2

9

14

DGTL1

V1/V2

DGTL2

DGTL1

QH52

QH53

DGTL2

V1/V2

SWITCHING

JA11

JH51

– 19 –

CD-K491W

Figure 19 BLOCK DIAGRAM (3/5)

9 7

12 13

5

DEM0 DEM1

XT1

BICK

LRCK

6

PD

16 20 22

2

14 15 24

8

18 17

+B12

1 3

10

11

21

A-GND

D3-GND

CENTER

SUB

WOOFER

CENTER

SUB

WOOFER

54

80

9 7

12 13

5

DEM0 DEM1

XT1

BICK

LRCK

6

PD

16 20 22

2

14 15 24

8

FL/FR

18 17

FL FR

+B12

1

3

10

11

21

A-GND

D3-GND

89

87

82

34

3

SSSORESET

SCK

SI

9

1

CLK2L/R

OUT

92

CLK2OUT

97

95

66

CLK2L/R

CLK

SCK

SCK2IN

5

55

59

67

70

81

84

93

+B13

6

12

17

30

35

45

48

90

78

94

86

85

62

0

2

8

19

29

37

44

53

65

68

71

D3-GND

CENTER

SUB

WOOFER

OUT

IN

OUT

FL/FR OUT

ICA18

ZR38600

DOLBY AC-3 /5.1

MPEG2 AUDIO

DECORDER

SUB

WOOFER

OUT

FL/FR

OUT

CENTER

OUT

SSSOSCK SIDEMO1

DEMO0

AC3 RESET

SUB

WOOFER

ON/OFF

AD RESET

4

8

SUB

WOOFER

IN

4

5

6

12 13

QA03

11

10

A-GND

7

14

QA01 QA02

–B12

+B12

8

1

9

2

5

7

–B12

+B7

ICA21

NJM4580M

–15dB AMP

SUB

WOOFER

OUT

SUB

WOOFER

ON/OFF

SWITCHING

FL/FR

VOLTAGE

REGURATER

VOLTAGE

REGURATER

+B7

+B12

–B6–B12

VOLTAGE

REGURATER

UN-SWITCHED

+B9

+B13

QB01

ICA19

AK4321

D/A

CONVERTER

ICA20

AK4321

D/A

CONVERTER

GND

VDD

4

8

+B7

–B12

3 5

1

7

IN

MIX

L R

OUT

ICB01

NJM4580M

MIX AMP

SUB

WOOFER

ICA22

BU4066BCE

SWITCH

TO MAIN SECTION

CD-K491W

– 20 –

Figure 20 BLOCK DIAGRAM (4/5)

J602

MIC2

J602

MIC1

VR602

MIC2

VOLUME

VR601

MIC1

VOLUME

VR603

DIGITAL ECHO

VOLUME

IC601 M65845FP MIC AMP.

L R

10 25

26

19 18

27

29 28

31

1

6

5

Q631

+B7

VOLTAGE

REGULATOR

VCCMIC

IN

GND

IN

OUT

MIC2 IN MIC SW

MIC1

VOL IN

MIC2

VOL IN

ECHO

VOL IN

43

8

1712

2113

20

1011161522

1

321

231

4

17

985

16

1561412101321222324

7

18

9

7

38

5

1

9

6

7

6

5

DO

CE

CL

DI

MUTING

VOLTAGE

REGURATER

+B7

RL

Q353 Q354

IF IN

IF OUT

FM MONO/ST MONO/ST

VR351

FM MUTE LEVEL

AM OSC

REGOUT

FM IF IN

X352

4.5MHz

OSC

STEREO

+B7

AM IN

FM IN

FMOSC

T351

AM IF

AM IF CF352

IN

X351

456KHz

FM IF

CF351

VCC

+B7

GND

QT01

Q360

IC303

LA1832

FM IF DET./FM MPX./AM IF

Q361

BFT01

GND

SW1 SW2

MW

FM

FM BAND

PASS FILTER

SW2 +B

SW1 +B

Q364

Q363

+B7

Q308 Q309

Q306 Q307

MW +B

T307 T308

T303 T304

SW1/SW2 OSC.

SW1/SW2 ANT.

T306

MW OSC.

T302

MW ANT.

+B7

AMP

LT02

FM

RF

LT01

FM

OSC

ICT01

TA7358AP

FM FRONT END

TT01

FM IF

CF302

FM IF

OUT

AM RF IN

AFC

IN

Q362

+B7

FM +B

FM

SO301

ANTENNA

TERMINAL

AM IN

IC302

LC72131

PLL CONTROLLER

+12V

IN

OUT

SD

33 34

VOICE C

MIC DET

1

9

5

3

7

1

8

4

7

16

11

15

14

12

10

13

1

5

2

4

2

1

24

23

2

3 4

4

5

6

7

8

9

16 14 13

12

15 19

10

17

18

20

21

4

40

1

20

3

L

SPE IN

L-IN

RIN

L-OUT

L R

R

L

L R

TAPE

L R

FUNC-A

FUNC-B

R

IN

OUT

L

R

ICZ09

NJM4565M

LINE AMP.

–B10

+B10

–B10

TUNER

VCR 1

VCR 2

L

JR11

VCR/AUX1

JR12

VCR/AUX2

ICH11

MOTOR

DRIVE

SWITCHING

M

MM1

TAPE

MOTOR

+B2

TA MOT H/L

HI SPEED

TA MOT SW

DRIVER

MOTOR DRIVER

DRIVER

QL13

QL11

QL12

QL18

QL14

T1/T2 SOLENOID

DRIVER

SOLM1

SOLENOID

T1/T2 CrO

2

QL15 QL19

SWM5

T1 RUN2SW

SWM6

CAM SW

SWM3

REC FWD

SWM4

REC REV

SWM1

T1 CrO

2

SWM2

T2 CrO

2

+B6

CAM SW

PHM1

T22RUN

QK13 QK14

QL16

ERASE

HEAD

L-CH R-CH

PB HEAD

L-CH R-CH

REC/PB

HEAD

P.B

AC BIAS

P.B

REC

TAPE 2

TAPE 1

T1/T2

L NF R NF

L(T1)

R(T1) L(T2) R(T2)

L R

POP REDUCE

L REC R REC

L R REC

ALC NOR/ HIGH

T1/T2

REF

+B7

P.B

REC/PB

MUTING

PB MUTE

REC MUTE

L NF R NF

SWITCHING

QK21 QK22

QK28

LK04

QK07 QK08

QK11

QK10

QK09

QK03 QK05 QK04 QK06 QK17 QK18

QK19

QK15 QK16

QK17 QK18

SWITCHING

BAIS

QK26QK24

BAIS

PB-EQ

T1 Cr0

2

T2 Cr0

2

HI SPEED

T2 REV-REC

T2 FWD-REC

QK31 QK32

QK27

Cr0

2

QK25

SWITCHING

BEAT CHANCEL

SWITCHING

LEVEL SHIFT

QK30

QK29 QK40

QZ03 QZ04

ICZ08

TC4052BF

DUAL 4CH ANALOG

MULTIPLEXER

TO DOLBY SECTION

ICK01 AN7345K

PLAYBACK&RECORD AMP

H/N

T1/T2

P.B.

REC

R

QL17

REC/PB

Cr0

2

SWITCHING

L

QG04

BIAS OSC.

VRM1 TAPE

SPEED

6

7

8

4

+B7

-B6

ICH11

MOTOR

DRIVE

– 21 –

CD-K491W

Figure 21 BLOCK DIAGRAM (5/5)

3

CHO

E

L R

26

18

27

29 28

D

IN

UT

8

4

1

7

3

5

2362615560 78 79

87 88 919293

94 95

96

97

98

10

100

11

14 13 18 56

90 15 57 89

12

16 17

28

86

85

84

7666656463545251

50

492726

2482

737475

53

585969707167

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

99

19

4

3

5

7

5

3

1

9 8

20

5

3

1

9 8

20

16 12

18

9

11

16

17

8

39

40

41

31 32

33 34

35

36 30

42

16

17 14

6

7

1

2

9

8

7

6

5

2

4

5

4

7

0

5

2

7

1

7

3

5

7

5

3

0

1

29 12

95 96 97

10

158918

4672 90 51 13142728

26

21

17

16

57

31

62

8885

91 94

1 2

3

4

8

4

9

10

31

1545444241

40

12

13

1617181920

1

8

4

1

R

L

IN

OUT

L R

SPE IN

~

SPE1~5

RES CQCK COIN SQ OUT WRQ RWC CD SL+

CD-PUIN CD-DRF

+B4 (5V BACK UP)

+B3

VDD

+5V UNSWITCH +B2

MEMORY BACK UP

VSS

+B4

RESET

OSC

X201

4.19MHz

SYSTEM STOP

P.FAIL DET

+B3

RESET IN

CD SL–

+B7

+

L-CH GND R-CH GND C-CH GND

M

FAN

+B6

PROT

RELAY

H/P SW SP DET

L-IN

R-IN

POSISTOR

TO CD UNIT

–B

+B

ICP11 NJM4565M LOW BOOST AMP.

ICV01 STK407-27 POWER AMP.

L-OUT R-OUT C-OUT

– + – +

–

QV20 QV21

QV22 QY21

QV13 QV14 QY11

VOLTAGE

REGULATOR

SWITCHING

VOLTAGE

REGULATOR

+12V(ANALOG)

+12V(MOTOR)

UN-SWITCHED

+B2

+B6

+B7

–15V

–B6

VOLTAGE

REGULATOR

+7.3V(CD)

TO CD UNIT

VOLTAGE

REGURATER

T.F

VF1 (AC)

VOLTAGE REGULATOR

+B

–B

D991

F995

T8A L 250V

F996

T8A L 250V

T991

POWER

TRANSFORMER

Q951

F997

T2.5A L 250V

F998

T1.6A L 250V

D992~D995

D996~D999

Q904

Q903

Q902 Q901

Q906 Q905

+B8

Q909 Q908

+4.6V

–B

+B

SL-OUT SR-OUT SW-OUT

SL-IN

SR-IN

C-IN

SW-IN

+ – + – +

TMV01 SPEAKER TERMINAL

JV91 HEADPHONES

TMV01 SPEAKER TERMINAL

ICQ01 QS7777PF Q-SOUND

L-IN

R-IN

L-OUT

R-OUT

C-IN

SL-IN

C-OUT

SR-IN

SL-OUT

SR-OUT

MO

AC

AR

BYP

+B7

VOLTAGE REGURATER

L-IN

R-IN

L-OUT R-OUT

C-IN

C-OUT

ICZ10

M62446FP

6ch

ELECTRO-

NIC

VOLUME

SL-IN

SR-IN

SL-OUT SR-OUT

SW-OUT

SW-IN

QV18

–B6

TU-DO

TU-SD

CE1

T1 CrO

2

T1 RUN T2 RUN

T2 A FP

T2 B FP

T2 CrO

2

CAM-SW

TAPE SOL

TA MOT

FR SP

BIAS

TA R/P

REC MUT

T1/T2

PB MUTE

QS2SPRED

QS2AC

FAN

SP LEVEL

POSISTOR

H/P SW

PROT

FRONT RELAY

SURROUND RELAY

CENTER RELAY

S-W RELAY

S-MUTE

POWER

S-W-MUTE

CENTER-MUTE

SURROUND-MUTE

QG01

QG02 QG03 ZDF01

FUNC B

FUNC A

STB

RES

SCK

DAT

COM

AD RES

SP CONF

DIGITAL1

DIGITAL2

AC3_SI

AC3_SCK

V1/V2

DEM 0

DEM 1

CD U/D

CD O/C

CD DNO

VR CLK

VR ST

VR DATA

VR CLK

VR ST

VR DATA

DI

TU CL

CLK2

ICZ01

LC7522

G.E. VOL

VOLTAGE

REGULATOR

+B10

–B10

VOLTAGE

REGULATOR

VOLTAGE REGULATOR

–B10

+B10

1

R

E

SL-CH GND SR-CH SW-CH GND GND

ICX01 STK407-27 POWER AMP.

QY52 QX20

RLYV11 RLYY11 RELAY

RLYX11 RLYY51 RELAY

QX51

QX13 QX14 QY51

–B10

+B10

+B11

F991 T5A L 250V

TUNER MUTE

F999

T500mA L 250V

BEAT CUT

TA PB EQ.

ICF01

IX0254AW

SYSTEM MICROCOMPUTER

TO DOLBY SECTION

~ ~ ~ ~

~

KEY MATRIX

ICD01

IX0233AW

SYSTEM

MICROCUMPUTER

SWD03~SWD06 SWD12~SWD17 SWD23, SWD26~SWD43 SWD50~SWD54

RXD01 REMOTE SENSOR

DAT

COM

STB

RES

~

KEY IN

JOG SW

FD01

FL DIPLAY

F1 F1

F2 F2

SWD02

SWD01

–VP

VEE

+B2

VDD VSS

~ ~

,

~

LEDD01~ LEDD23~28

+B6

+B2

XD01

M901 FAN MOTOR

–VP

AC POWER SUPPLY CORD AC110/127/220/230-240V 50/60Hz

POWER

SWITCHING

QV16 QV17

QP13 QP14 QP15

SR-MUTE

SW-MUTE

QR11 QR12

S-MUTE

C-MUTE

QR13

QP13 QP14 QP16

QZ01

QZ02

Q911 Q910

+5V(AC-3)

+B9

VOLTAGE

REGULATOR

QP91

+B12

VOLTAGE

REGULATOR

ICZ03,05,07

NJM4565M

IN/OUT FILTER

AMP

+B10 –B10

+B10

–B10

CLK

DI

ICZ02,04,06

NJM4565D

IN/OUT FILTER

AMP

VF2 (AC)

VF1 (AC)

HIGH SP

AC3_SS

AC3_RES

AC3_SO

SCK

VF2 (AC)

QX16

QV19

–

16 12

18

~

,

39 53

QS2MO

68 4748

VOLT SW

AMP

QP11

QP12

14

QX17 QX18

14

QP17

SWITCHING

Q913 Q914

–12V

7

1

R

E

F992

T2.5A L 250V

SW991

VOLTAGE

SELECTOR

F991

T2.5A L 250V

230~240V

220V 127V

110V

77 81

VOICE-C MIC DET

CD-K491W

– 22 –

Figure 22 SCHEMATIC DIAGRAM (1/20)

A

B

C

D

E

F

G

H

1

23456

• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.

R46

560

FSS

LDO

DEF

CLK

CL

DAT

CE

DRF

VCC2

REF1

VR

LF2

PHI

BHI

LDS

10

1

8

9

12

C85

0.001

C25 27P

R39

1K

C15

0.01

R41 47K

R43

56K

R44 33K

R42

47K

R28

10K

R29 56K

C17

0.001

R30

6.8K

R20

1K

R19

1K

C3

1/50

R34 22K

R48 10K

C36

100/16

IC3

M56748FP

FOCUS/TRACKING/SPIN

/SLIDE DRIVER

R11

6.8K

C6

0.033

R10

2.2K

C5

0.033

C54

0.001

R8

15K

R9

100

C16

0.0047

R27 39K

R25

1.5K

R23

10K

R24

47K

R17 33K

C29

4.7/50

C28

0.1

C14

0.01

C4

0.1

C35

1/50

R1

10

Q1

KTA1266 GR

R18

15K

C11

0.1

D3

RL104A

R35

220K

C21

0.0033

R36 220K

C20

47/16

C19

1/50

R33

1.2K

R32

10K

C32

0.01 C31

220/6.3

C30

0.1/50

C27

0.001

C24

2.2P

R40

5.6K

C26

0.033

R31

1.2K

C18

0.47/50

R16

3.3K

R15 12K

C10

180P

C8

0.068

C7

0.1/50

R12

100

D4

RL104A

D2

RL104A

C9

0.047

R13

1K

R14 27K

C12

0.1

R2 1K

C1

47/16

C2

0.01

CNP3

R38 470

C2

3

0.00

2

R45

4.7K

C 2

IC1

LA9241M

SERVO AMP.

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

C13

330P

R37 82K

D1

1SS133

R22 22K

R21 22K

C34

0.33/50

C33

0.47/50

1 2 3 4 5

CNP1

1

2

3

4

5

CNS1A

CNS1B

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

31

30

29

28

27

26

25

2423

22

21

20

19

18

17

1

2

3

CNP12

15

16 17 18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

1 2 3 4 5

6

7 8 9

10 11 12 13 14

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

1

2

3

4

5

6

CNS3A

CNS3B

CNP3A

M

M2

Sled

Motor

M

M1

Spindle

Motor

SW4

Pickup

In

1 2 3 4 5 6 7 8

1 2 3

4

5

6

7 8

1 2 3 4 5 6 7 8

CNP2

CNS2B

CNS2A

1 2 3 4 5 6 7 8

1

2

3

4

5

NC

49505152535455565758596061626364

NC

CD2PUIN

CD2GND

B

LD

K

PD

A

TR– TR+

FO–

FO+

F

E

SL2–

SP+ SP– SL2+

GND

HF

TP1

TE

TBC

JPCLO

SLOF

FSC

FE1

FOSTA

FSC

EFBAL

+

–

REF

JP

REF

CV– CV+ JP– JP+

VREF

2FREQ LASER

8/12CM

FSTA

S.Q.R

FOSTA TOSTA

LATOH

FSTA

SLOF

CL

CE

DRF

HFL

DEF

VCC

THD

GL

THDL

TGL1

VCR

FE1

REF

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

REF

RF

REF

DGND

SLI

VCC1

FIN2

2.4V

4.8V

4.2V

1.5V

2.4V

2.5V

2.4V

2.5V

2.4V

2.5V

2V

2V 0V 0V 0V 0V 0V 2V

2.5V

0V

4.7V 0V

2.5V 0V

0V

2.5V

1.8V

1.8V 0V 0V 0V 0V 2V 2V

2.5V

4.7V

0.7V

0V 0V

2.5V

2.4V

2.5V

0V

2.5V

2.2V

0V

4.8V

0V

4.8V

0V

1.5V

2.4V

2.5V

2.4V

0V

2.5V

0V

2.4V

4V4V0V

0V

4.8V

2.5V

1V

2.2V

4.2V

0V

4.8V

FIN1

E F

TB TE–

TE

TESI

SCI

REF

TO

REF

JP

REF

TH

TD

TD–

JP TO

FD

GEN

FD–

FA–

FA

FE

FE–

AGND

SP

SPI

SPG

SP–

SPO

SLEO

SLD

SL–

SL+

REF

OR

REF

RF

SLC

RFS–

RFSM

JP–

JP+

TGL

TOFF

TES

HFL

SLOF

CV–

CV+

–

+

K E A B F

WRQ(DSP)

RWC(DSP)

CO IN(DSP)

SQ OUT(DSP)

+B

+

–

+ –

LD

VR

PD

GND

FO–

FO+

TR+

TR–

LD

VR

PD

GND

FO–

FO+

TR+

TR–

K E A B F

LD

K E B

A F C

MON

1M

2200P

1M

2200P

TR+ FO+

FO–

TR–

LT0H30M1

ACTUATOR

CD MOTOR PWB-K

PICKUP UNIT

LD

GND

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

–

+

R26

82K

7

6

5

4

3

2

– 23 –

CD-K491W

Figure 23 SCHEMATIC DIAGRAM (2/20)

7

8 9 10 11 12

• The numbers 1 to 12 are waveform numbers shown in page 52.

11

R85

56

(1/2W)

C56

0.022

Q52

KTC3203 Y

C52

100/16

R64

22

R66

330

ZD61

MTZJ4.7B

C50

0.022

L61

0.82µH

R55 150

C82

47/16

R82

6.8K

D91

1SS133

R86

2.2K

R87

10K

Q93

KRC102 M

Q91

KTA1271 Y

C37

0.022

R47

10K

C53

0.022

C46

100P

R80

6.8K

Q51

KRC107 M

R81

3.9K

R51

3.3M

R88 1K

XL1

16.934MHz

C41

12P

C42

15P

R93 220

D81

1SS133

D82

1SS133

C83

0.022

R54

330

R83

3.9

IC81

TA7291S

LOADING MOTOR DRIVER

R89 1K

R90 1K

R50 680

C39

0.047

C40

0.047 R52 27K

R60

1K

R57 1K R58 1K

R61 1K

R59 1K

C38

0.01

R63 1K

R62 1K

A

C57

0.001

C81

47/16

C49

100P

C48

100P

C43

330/6.3

R53 1.2K

C23

0.0027

C22 220P

C47

100P

C45

100P

C44

100P

1

S133

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

17

16

15

14

13

12

11

10

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

30 31

32

9

8

7

6

5

1 2

3 4

1 2 3

CNP11

CNSF11

1 2 3

CNS99

CNPR11

BI99

1 2 3 4 5 6 7 8 9

10

1 2 3 4

5

6

1 2 3 4 5 6

7 8 9

10

CNP10

1 2 1

2

BIM05

CNS5

SW3 DISC NUMBER

SW2 MECHA UP

SW1 OPEN/ CLOSE

M

M3 T/T UP/DOWN LOADING

SOLENOID 2

C51

100/16

9

8

7

6

5

4 3 2 1

234

5

6

7

8

9

10

11

12 13

14

NC

CD2LD2M+

M– M+

SOL

CD2LD2M–

CD2D2NO

+7.3V

TEST5

/CS

TA1

SOL GND(M)

M+

M– GND(D)

OPEN CLOSE DISC NO. GND(D) MECHA UP GND(D)

+

–

2Kx8

RAM

1BIT DAC

SERVO

COMMAND

TES

HLF

V/P

CLV2

CLV+

TEST2

EFMIN

EFMO

VSS

FR

VVDD

ISET

VVSS

PDO

DEF1

CLV

DIGITAL SERVO

EXTERNAL

OUTPUT

SYNC-DETECT

EFM DEMODULATE

SLICE LEVEL

CONTROL

VCO CLOCK

OSC CONTROL

ERROR COERECT

FLAG CONTROL

OUT

DIGITAL

NC

TOFF

TGL

JP+

JP2

PCK

FSEQ

VDD

CONT1

CONT2

CONT3

CONT4

CONT5

EMPH

C2F

TEST3

DOUT

4FS DIGITAL FILTER

TEST1

TEST4

MUTEL

LVDD

LCHO

LVSS

RVSS

RCHO

RVDD

MUTER

XVDD

XOUT

XIN

XVSS

49505152535455565758596061626364

SBSY

EFLG

SUB-CODE

µ-COM

INTERFACE

TEST11

SBCK

SFSY

PW

FSX

WRQ

RWC

SQOUT

COIN

/CQCK

/RES

16M

4M

X-TAL

GENERATOR

0V

2.5V

0V

0V0V0V

0V

4.8V

2.5V

0V

4.8V

0V 0V

4.8V

0V

12V

0V

6.4V1V0V

6.5V

2.9V

0V

12V

0V

4.8V

4.5V

0V

2.0V

4.5V

4.8V

2.2V

2.1V

0V

2.2V

2.5V

0V

4.8V

1.9V

0V

+12V

CD-GND

+7.3V

+B

1

2

3

+B

1

2

3

CNS10

LOCK

SENSOR PWB-J

+5V

+B

IC2

LC78622K

SERVO/SIGNAL

CONTROL

OP/CLOS

UP/DOWN

DISC NO.

D2GND

RES(DSP)

WRQ(DSP)

CQ CK(DSP)

CO IN(DSP)

SQ OUT(DSP)

DRF (ASP)

SLD+

SLD–

PUIN SW

CD SERVO PWB-B

TO MAIN PWB

P24 1-C

TO MAIN PWB

P24 1-D

CNSF12

TO MAIN PWB

P28 2-C

CD-K491W

– 24 –

A

B

C

D

E

F

G

H

1

23456

• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.

Figure 24 SCHEMATIC DIAGRAM (3/20)

DH06

1SS133

QG04

KTA1266 GR

9/50

10/100

SWF02

SPAN

SELECTOR

RF66

@

1K

RF78

@

1K

RF76

@

1K

RF74

@

1K

RF73

@

1K

RF71

@

1K

RF70

@

1K

RF69

@

1K

RF68

@

1K

RF65

@

1K

RF64

@

1K

RF63

@

1K

RF62

@

100

RF61

@

1K

RF60

@

1K

RF54

@

1K

RF52

@

1K

RF51

@

1K

RF37 1K

RF38 1K

RF39 K

RF40 1K

RF44 1K

RF46 1K

RF49 1K

RF50 1K

RF36 1K RF35 1K RF34 1K RF33 1K RF32 1K RF31 1K

RF03

1K

RF04

1K

RF05

1K

RF09 1K

RF10 1K

RF11 1K

RF12

1K

RF13 1K

RF14 1K

RF08 1K

RF07 1K

RF06 1K

RF81

1K

RF82

@

1K

RF83

@

10K

RF84

@

1K

RF85

@

1K

RF86

@

1K

RF87

@

1K

RF88

@

1K

RF91

@

1K

RF92

@

1K

RF93

@

1K

RF94

@

1K

RF95

@

1K

RF96

@

1K

RF97

@

1K

RF59

@

1K

RF58

@

1K

RG55 1K

RF79

@

10K

RF55

@

1K

RG05

10K

RF80

1K

ICF01

IX0254AW

SYSTEM CONTROL

MICROCOMPUTER

CG56

0.022

XF01

CG05

15P

CG06 15P

RF17

0.0

RG04

10K

RG08

@

10K

RG07

@

10K

RG06

@

10K

CG57

47/25

RF28

1K

RF27

@

1K

RF25

@

1K

RF24

@

10K

RF23

@

1K

RF22

@

1K

RF21

@

1K

RF20

@

1K

RF19

@

1K

RF26

@

1K

RF29 1K

RG56

@

1K

RF01

1K

RF02

1K

RF99

@

1K

RG95

470K

QG92

KTC3199 GR

RG96

10K

RG94

10K

RG24

10K

RG38 100K

RG25

@

10K

RF30

1K

RG16

47K

RG19 47K

RG26

10K

RF67

@

1K

RG11

10K

RG23

10K

RF98

@

1K

RF48 1K

RG20 10K RG21 10K RG22 10K

RG17

10K

RG15

10K

CH29

0.022

CH28

0.022

CH15

0.22/50

RH16 470K

DH11

1SS133

CH13 330P

RH14

560K

RH15

33K

CH18

0.22/50

RH24

470K

DH12

1SS133

RH20

1.5K

CH17

0.047(ML)

RH21 560K

RH22

33K

CH16

1/50

CH21

0.22/50

DH13

1SS133

RH29 470K

RH25

1.5K

CH20

0.015

RH26 560K

RH27

33K

CH19

0.47/50

CH24

0.22/50

DH14

1SS133

RH34 470K

RH30

1.5K

CH23

0.0047

RH31 560K

CH22

0.1

(ML)

RH32

33K

CH27

0.22/50

DH15

1SS133

RH39

470K

RH35

1.5K

CH26

0.0012

RH36 560K

CH25

0.027 (ML)

RH37

33K

ICH11

NJM4558M

MOTOR DRIVER

RH11 150K

RH12

1K

CH10

47P

RH13 150K

RH17

1.5K

DH16

1SS133

DH17

1SS133

DH18

1SS133

DH19

1SS133

DH20

1SS133

RF47 1K

RF53

@

1K

CH30

0.0056 (ML)

RF75

@

1K

RF77

@

22K

RF42 1K

RF43 1K

CG08

0.001

RG01

220K

PRE R-CH

PRE L-CH

REC R-CH

REC L-CH

GND(A)

VSS

VDD

PL4 PL0 PL1 PL2 PL3

PC2

PC3

PC1 PC0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PA6 PA5

PA3

PA4

PA2

PA7

PB0

VDD1

CF2

CF1

VSS1

P74

P75

P17

P16

P34 P35 P00 P01 P02 P03 P04(PCCL)

P30 P31 VSS3 VDD3 P32 P33

MIC_DET

9K/10K

SCK

SO1

SCK1

SO0

Si0

AN0

AN1

AN2

AN3

AN4

AN5

AN6

AN7

INT1

INT2

INT3

SI1

INT0

GND(µ-CON)

GND(A)

+12V(A)

+4V(µ-CON)

TAPE_SOL

HIGH_SP

TA_BIAS

PB_MUT TA_T1/T2 REC_MUT

V1/V2

AC3_SCK

AC3_SO

AC3_SIN

AC3_SS

AC3_RES

DGTL2

DGTL1

CD_O/C_SW

CD_U/D_SW

CD_DNO_SW

H/P SW

–15V

+12V(A)

GND(A)

AUTO_SCAN

VSS

VDD

FR SPEED(M)

TA MOTOR

CAM_SW T2_CRO S T1_CRO S T2_B-FP S T2_A-FP S

PUIN

RES(MAIN)

TA_FR SPEED

M2GND

–1

+12V

SO

AC32SO

VOLT_SW

AD RES

SP_CONF

POWER

VR ST

VR CLK

VR DATA

FUNC B

FUNC A

S.W.MUT

CENT_MUT

REAR_MUT

SYS_MUT

TUN_MUT CLCE1

TUN_SD

FRNT_RLY FAN CONT

CENT_RLY

REAR_RLY

S.W.RLY

GND(CD2) GND(CD1) GND(D) +7.3V(CD) +12V(M) +4.6V(D)

+4V

AUX 2

L-CH OUT

GND(A)

R-CH OUT

L-CH OUT

GND(A)

R-CH OUT

VIDEO2 IN VIDEO1 IN

TO PRE SECTION

P28 2-G

AUX 2

AUX 1

(1/2)

8

4

1

3

2

+

–

7

(2/2)

5

6

–

+

16KHz SPE-1

AMP

QS_AC

QS_MO

DO(TU)

DI(TU,VR,PR)

RES

RWC

CFWU02

94

IC

CLK2

7

SP_4K

SP_1K

63Hz SPE-2

250Hz SPE-3

1KHz SPE-4

4KHz SPE-5

TAPE L

TAPE R

TUN R

TUN L

AUX 1

QS_SPRED

VOICE-C

TA_R/P

TA_PB-EQ

DATA1

RESET

COM1

+12V(M)

GND(D)

STB SCK1

+4.6V(D)

1

CNPF01

2

3

4

5

6

7

8

9

10

CNSD01

TO DISPLAY PWB P36 1-C

RES DAT STB SCK

COM

+B

1

1 2

2

3

BIF11

CNSF11

+12V(M)

GND(CD) +7.3V(CD)

CNP12

RWC WRQ COIN

SQOUT

CQCK

RES DRF

D_GND

SLD+

SLD– PUIN

DISC_NO UP/DOWN

OP/CL

11 22 33 44 55 66 77 88 99

10

10 11 11 12 12 13

13 14 14

BIF12

CNSF12

TO

CD SERVO PWB

P23 7-H

TO

CD SERVO

PWB

P23 12-C

CNP11

RF41 1K

BEAT CUT

+B

81

1885801884

+B

–B

+B

1

BIF13

22 33 44 55 66 77 88 99

10

11 11

1

CNSF13

R-CH

L-CH

TUN MUTE

SD

GND(A)

+12V(A)

DI

CE(CE1)

DO

CL

GND(D)

CNP303

TO TUNER PWB

P33 12-A

1

2

3

4

5

6

7

8

9

10 11 12

13 14 15 16 17 18 19 20 54 55 23 24 25 26 27

TA_T1/T2

PB_MUT

PRE L-CH

HIGH_SP

PRE R-CH

GND(A) +12V(A)

TA_BIAS

REC L-CH

REC R-CH

TA_R/P

REC_MUT

BEAT_CUT

TA_PB-EQ

GND(D)

TA_MOT_SW

M +12V

TA_SOL

T2_A_FP

TA_CAM_SW

M_GND

T1_RUN

T2_B_FP

T2_RUN

T1_CrO

2

T2_CrO

2

TO MECHA SECTION

P27 12-B

TO DECK SECTION

P27 12-E

1234

5

6

7

8

9

10 11 12 131415

16 17

18 19 20 21 22 23 24 25 262728 29 30

31

32

33

34

35

36

37

43 42 41 40 39 38

50 49 48 47 46 45 44

51

52

5354

5556

57

58596061626364656667

6869

70

71

72

73

74

75

76

77

78

79

80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

10 0

DEM1

DEM0

1 2

P06 P07

P05

DS_RES

CQCK

DAT

SCK

STB

WRQ

RES

DRF

VSS

COM

SLD–

SLD+

COIN

SQOUT

SP_16K

TUN_SM

POSISTOR

T1_RUN

SP LEVEL

SYS_STOP

SP PROT

T2_RUN

SP_250Hz

SP_63Hz

30

PA0

PA1

51

PC5

PC4

PF3

PF2

PF1

PD2

(DO)PD3

PD4

(DI)PD5

PD6

PD7

PE0

PE1

PE2

PE3

PE4

PE5

PE6

PE7

PF0

PD1

PD0

PC7

VSS2

VDD2

PC6

PF7

PF6

PF4

PF5

80

PL6

PL5

+B

– 25 –

CD-K491W

Figure 25 SCHEMATIC DIAGRAM (4/20)

7

8 9 10 11 12

CG04

0.01

DG05

1SS133

RG37

1K

RG36

3.3K

QG01

KRC102 M

QG03

KTC3199 GR

RG32

100

ZDF01

MTZJ3R3A

RG31

1K

DG02

1SS133

DG04

1SS133

CG03

3.3/50

CG02

0.01

QG02

KTC3199 GR

RG34

10K

RG30

150

RG29

150

CG01

470/10

RG35

1K

DG03

1SS133

RG33

10K

LG01

2.2µH

RG20 10K RG21 10K RG22 10K

RG17

10K

RG15

10K

RG39

82

RESET

POINT

+4V

–15V

+12V(A)

R OUT

L OUT

C IN(C OUT) SL IN(LS OUT) SR IN(RS OUT) SW IN(SW OUT)

CD GND(D1) GND(D)

CD GND(D2)

+7.3V(CD) +12V(M) +4.6V(D)

TO PRE SECTION

P29 9-G

GND(D)

VR CLK VR DATA VR LA TCH

FUNC A FUNC B

+4V

CONTROL

AUX 2

R-CH OUT

L-CH OUT

GND(A)

R-CH OUT

VIDEO2 IN IN

RE SECTION P28 2-G

X 2

1

+5V(AC32A)

CD GND(D2)

CD GND(D1)

+7.3V(CD)

GND(M)

VGND

GND(D3) GND(D4) +5V(AC32B)

VR DI

CLK2

+B

–B

RESET

1

2 3

+B

–B

28 18 19 27

29 30 31 32 33 34 35 36 37 38

39 40 41 42 43 44 45

66

69

59 60 61 62 63 18 19 64

56 57 58

54 55

47 48 49 50 51 52 53

46

3 7

POWER

VOLT SW SP PROT POSISTOR

H/P SW SP LEVEL FAN CONT

FRNT RLY(1)

+4.6V(D)

GND(D)

SW RLY(4) REAR RLY(3)

S-MUTE

CENT-MUTE

REAR-MUTE

SWF-MUTE

AMP CONT

+12V(A)

GND(A)

–15V

+12V(M)

GND(A) +12V(A)

IN(R)

IN(L)

RR IN

QS_SPRED

OUT(L) OUT(R)

RL IN

C IN

RL OUT RR OUT C OUT

QS_MO

VCAN OUT(L) IN(L) GND(A) +12V(A) OUT(R) IN(R) GND MIC

QS_AC

+B

–B

+B

–B

+B

67 68 69 70 71 72

73 54 55

58

56

57

76

27

76

57

86 18

87

58

55 54

77

28

19 18

56

AC3-SW-CHOUT AC3-RS-CHOUT AC3-LS-CHOUT AC3-C-CH OUT AC3-R-CH OUT AC3-L-CH OUT SPEC ANA –15V +12V AGND

AGND RT IN

LT IN

TUN L

TAPE L

AUX 1 AUX 2

TUN R

TAPE R

AUX 2

AUX 1

78 15 80 81 82 17 84 85

SR IN(RS OUT)

SL IN(LS OUT)

C IN(C OUT)

SW IN(SW OUT)

LT IN RT IN

V-SW(V1/V2)

L OUT(LIN)

R OUT(RIN)

AGND

1

CFWU01

2

3

4

5

6

7

8

9

10

+B

–B

+B

1

CFWU02

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

+5V

A+12V

AGND

VGND

+5V(AC3_A) +5V(AC3_A)

(AC3_B)

A-15V

GND(D3) GND(D4)

SO

DGTL1

SP CONF

DEM0

DEM1

SCK

AC3_RES

SI

AD RES

SS

DGTL2

FWA01

TO DOLBY PWB

P35 8-H

CFWA01

FROM KARAOKE PWB

CNSU02

1

20

FWA02

TO DOLBY PWB

P34 5-H

CFWA02

10

1

+B

–B

AC3-C-CH OUT

AC3-L-CH OUT

AC3-R-CH OUT

AC3-LS-Ch OUT

AC3-RS-CH OUT

AC3-SW-CH OUT

765756585554

TO PRE SECTION

P28 4-G

81

188580

MAIN PWB-A(1/5)

FM SIGNAL

PLAYBACK SIGNAL

RECORD SIGNAL

TO QSOUND SECTION

P31 7-H

CENT RLY(2)

TO VOLUME SECTION

P30 6-H

TO VOLUME SECTION

P30 4-A

8 9

7

6

5

4

3

2

1

P32 3-A

CD-K491W

– 26 –

Figure 26 SCHEMATIC DIAGRAM (5/20)

A

B

C

D

E

F

G

H

1

23456

• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.

TAPE MECHANISM ASSEMBLY

QK14 KRC104 M

QK09

KTA1266 GR

RK13 10K

CK09

0.022

RK14 10K

QK10 KRC104 M

QK11 KRC104 M

RK15

4.7K

CK01 680P

CK02 680P

RK02 1K

RK01 1K

QK13

KRC104 M

QK03

2SC1845 F

RK03

2.2K

QK05

2SC1845 F

RK05

3.3K

RK31 33K

CK23

0.01

RK27

8.2K

RK25

5.6K

RK23

3.9K

RK21 100K

RK19 56

CK19 560P

CK17

0.033 RK29

10K

CK25

0.0082

CK21 1/50

CK13 330P

CK11 330P

CK12 330P

CK20 560P

CK22 1/50

RK24

3.9K

RK22 100K

CK18

0.033 RK26

5.6K

RK30 10K

CK26

0.0082

RK32

33K

CK24

0.01 RK28

8.2K

RK20 56

CK31

CK29

RK37

6.8K

RK35

6.8K

RK33 22K

RK38

6.8K

C 2

7

RK36

6.8K

CK27

0.022

CK28

3.3/25

RK34 68K

RK18 1K

RK17 1K

CK07

0.001

CK08

0.001

QK07

KTC3199 GR

QK08

KTC3199 GR

RK08 47K

RK07

47K

QK04

2SC1845 F

QK06

2SC1845 F

RK06

3.3K

RK04

2.2K

RK11 15K

RK12 15K

RK09

4.7K

RK10

4.7K

1

24

23

2 3 4

5

22

21

20

18

7

6

19

CK05

330P

CK06

330P

RK89

1K

RK90

1K

CK16 47/16

CK15 47/16

CK14 330P

RL13

6.8K

QL12

KTA1266 GR

DRIVER

RL12

2.2K RL14

33K

RL11 33K

QL11

KTA1266 GR

DRIVER

RL15 10K

QL14

KTA1273 Y

CL12

47/16

RL17 10(1/2W)

QL15

KTA1271 Y

DRIVER

DL12

1SS133

RL18 10K

RL20

1.2K

PHM1

M

FWM2

SWM4 REC RVS

SOLM1 SOL

SWM3 REC FWD

SWM6 CAM SW

SWM5 F.A.S

VRM1

3.3K(B)

RM1

2.7K

CL11

0.01

RK69 220

CK60 100/16

QL17

KRC104

M

SWITCHIN

G

K

R

QL13

KRC104 M

SWITCHING

RL16

2.2K

RL19

2.2K

TAPE SV MECHA.

2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9

1 1

WTL11

1

CNPK1

1

CNSK1

2 2

3 3

1

CNPK2

2

3

4

5

6

7

RECORD SIGNAL

PLAYBACK SIGNAL

REC

PLAYBACK HEAD

TAPE1

HIGH=T1

– +

112K

–

+

112K

PB EQ(CrO2)

PB EQ(CrO

2

)

PB EQ(CrO

2

)

REC

T2 CrO

2

T1 CrO

2

T2 B-FP

T2 PH-OUT

T1 RUN-SW

M-GND

T2 A-FP

MOT +B

MOT H

MOT L

+B

MM1 TAPE

MOTOR

H

L

–

+

L H

MOT+B

M-GND

F.A.S

RUN PULSE

SOL

REC FWD

CAM SW

REC RVS

SOL

+B

HI

G

CAM SW

+B

1

2

3

1

2

3

2

L–CH

R–CH

1

2

3

1

2 3

1

23

1

2

3

1 2

10 10 11 12 13

11 12 13

TAPE

SPEED

0V

4.

12V

0V

0V0V

0V

3.8V

8.7V

8.0V

8.7V

0.7V

0V

0.6V

0.3V

0V

0V0V0V0V

0V

3.0V

0.6V

1.3V

0V

4.0V

0V

0V 0V

0V

CNSK02

BI102

6

5

4

3

2

1

7 6 5 4 3 2

TAPE2 HEAD

PWB-M

ERASE

HEAD

R-CH L-CH

RECORD/ PLAYBACK HEAD

TAPE2

– 27 –

CD-K491W

Figure 27 SCHEMATIC DIAGRAM (6/20)

7

8 9 10 11 12

RK57

4.7K

QK19 KRC104 M

CK41 47/25

CK46 220/10

CK45

22/25

RK50

10K

RK58 150(1/2W)

ICK01

AN7345K

PLAYBACK AND RECORD

/PLAYBACK AMP.

QK15

KRC104 M

SWITCHING

CK37

0.018

CK10 47/25

CK35

0.022

RK41

82

LK01

1.8mH CK33 22/25

RK39

560

CK31

270P

CK29

470P

37 K

6.8K

3

CK39

0.0033

CK42 47/25

CK34 22/25

CK38

0.018

CK36

0.022

RK38

6.8K

CK32 270P

CK30

470P

CK47

0.022

RK45 10K

RK49 10K

CK40

0.0033

RK47 10K

CK44

0.022

CK43

0.022

RK48 10K

RK43 10K

RK46 10K

RK52 1K

RK67 47K

QK28 2SC2236 Y

LK03 1mH

CK52 47/16

RK62 47K

RK72 56K

RK64

4.7K

QK27

KRC104 M

RK73 56K

CK50

0.0082 (P.P)

CK51

0.027 (ML)

RK68

4.7

LK04 330µH

RK53 10K

RK54 10K

RK55 22K

RK56 22K

16

9

8

18

7

17

RK65

10K

RK60 270

RK61 270

CK62

0.047 (ML)

RK66 27K

RK42 82

RK40 560

LK02

1.8mH

RK74 68K

RK75 68K

QK30

KRC104 M

RK81

6.8K

RK63

10K

CK55

0.022

CL13

3.3/50

RL24

3.3K

L17 104 M CHING

QL18

KRC104 M

QL19

KRC104 M

DRIVER

QL16 KRC107 M

DL11

1SS133

QK40

KRC107 M

QK29

KRC107 M

1

2

3 4 5

6 7 8 9

GND(D)

PB.MUTE

GND(A)

12V(A)

VCC

RIPPLE

ALC

HI.SP

– +

56K

+

56K

HI.SP

BIAS

T1-CrO

2

T2-B-FP

TA-MOT-SW

M-12V

TA-CAM-SW

T1-RUN T2-RUN

T2-A-FP

M-GND

TA-F/R SPEED

TA-SOL

HIGH=HI-SP

NOR/HIGH

3

1

2

3

1

2

1

2

3

+B

M-12V

TA-CAM-SW

T2-A-FP

M-GND

TA–F/R SPEED

T1-RUN T2-RUN

TA-SOL

TA-MOT-SW

T2 CrO

2

H:CrO2 L:NORM

T2-B-FP T1-CrO

2

PB.MUTE H:ON L:OFF

HI. SP H:LOW L:HIGH PRE R-CH

TA T1/T2 H:T1 L:T2

MUTING QK17 2SC2878 A

MUTING

QK18

2SC2878 A

1

2

3

SWITCHING

QK16

KRC104 M

1

2

3

1

2

3

SWITCHING

QK24

KTA1266 GR

SWITCHING

QK26

KRC104 M

SWITCHING

QK25

KTA1266 GR

1

23

1

2

3

MUTING

QK22

KTC3199 GR

MUTING QK21 KTC3199 GR

1

2

3

1

2

3

1

QK29,QK30, QK40:SWITCHING

+B

BIAS H:ON L:OFF

REC R-CH

REC L-CH

TA R/P H:PB L:REC

REC MUTE

TA PB EQ L:NORM H:CrO2

+B

BEAT CANCEL

TO MAIN SECTION

P24 1-G

3

10 11 12

PRE L-CH

13 14 15

16 17

18

–

54 55

19

20

GND

151413

12

1110

23

24 25

26 27

MAIN PWB-A(2/5)

0V

4.1V

0V

4.0V

12V

V

0V

0V 0V

0V

11.7V

11.6V

11.7V 0V

0V

0.7V

11.7V

0V

0V0V

0V

0.3V

0.6V

0V

6.0V

3.7V

0.6V

3.0V

TO MAIN SECTION

P24 1-H

Sharp CP-K491, CP-SW491, GBOXS0010AWM3, GBOXS0011AWM3 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual