Sharp CD-K477W User manual

Brand: Sharp

Model: CD-K477W

Category: CD players

Type: User manual

– 1 –

CD-K477W

No.S8869CDK477W/

CONTENTS Page

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

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

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

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

OPERATION MANUAL ...................................................................................................................................................... 8

DISASSEMBLY................................................................................................................................................................ 10

REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 13

ADJUSTMENT ................................................................................................................................................................. 14

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 18

TYPES OF TRANSISTOR AND LED................................................................................................................................18

BLOCK DIAGRAM ........................................................................................................................................................... 19

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

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 49

TROUBLESHOOTING ..................................................................................................................................................... 50

FUNCTION TABLE OF IC................................................................................................................................................ 54

FL DISPLAY..................................................................................................................................................................... 61

REPLACEMENT PARTS LIST/EXPLODED VIEW

CD-K477W

• In the interests of user-safety the set should be restored to its

original condition and only parts identical to those specified be

used.

SERVICE MANUAL

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

SHARP CORPORATION

Manufactured under license from Dolby Laboratories Licens-

ing Corporation.

DOLBY, the double-D symbol and "PRO LOGIC" are

trademarks of Dolby Laboratories Licensing Corporation.

CP-K477, CP-SW477, CENTER(GBOXS0015AWM2)

and Surround (GBOXS0016AWM2) speaker system

Constibute CD-K477W

CD-K477W

– 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.

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 proce-

dures 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.

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

– 3 –

CD-K477W

● General

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

50/60 Hz

Power consumption: 190 W

Dimensions: Width; 270 mm (10-5/8")

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

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

Weight: 10.2 kg (22.5 lbs.)

● Amplifier section

Output power: PMPO; 1600 W

(Front)

MPO; 182 W (91 W + 91 W)

(10 % T.H.D)

RMS; 100 W (50 W + 50 W)

(10 % T.H.D)

(Centre)

MPO; 49 W (10 % T.H.D)

RMS; 25 W (10 % T.H.D)

(Surround)

MPO; 49 W (total) (10 % T.H.D)

RMS; 25 W (total) (10 % T.H.D)

(Sub woower)

MPO; 91 W (10 % T.H.D)

RMS; 50 W (10 % T.H.D)

Output terminals: Front speakers; 8 ohms

Centre speaker; 8 ohms

Surround speakers; 16 ohms

Sub woofer; 8 ohms

Headphones; 16-50 ohms

(recommended; 32 ohms)

CD digital output (optical)

Input terminals: Video/Auxiliary (audio signal) ×

2; 500 mV/47 kohms

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: 90 dB (1 kHz)

● Front speaker section

Type: 3-way type [130 mm (5-1/8")

woofer, 50 mm (2") tweeter and

super tweeter]

Maximum input

power: 100 W

Impedance: 8 ohms

Dimensions: Width; 190 mm (7-1/2")

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

Depth; 264 mm (10-7/16")

Weight: 3.0 kg (6.6 lbs.)/each

● Centre speaker section

Type: 100 mm (4") woofer

Maximum input

power: 50 W

Impedance: 8 ohms

Dimensions: Width; 262 mm (10-5/16")

Height; 145 mm (5-3/4")

Depth; 201 mm (7-15/16")

Weight: 1.4 kg (3.1 lbs.)

● Surround speaker section

Type: 100 mm (4") woofer

Maximum input

power: 25 W

Impedance: 16 ohms

Dimensions: Width; 170 mm (6-3/4")

Height; 123 mm (4-7/8")

Depth; 176 mm (6-15/16")

Weight: 0.7 kg (1.5 lbs.)/each

● Sub woofer section

Type: 160 mm (6-1/2") woofer

Maximum input

power: 100 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.)

SPECIFICATIONS

CD-K477W

GBOXS0015AWM2

GBOXS00016AWM2

CP-SW477

CP-K477

CD-K477W

– 4 –

NAMES OF PARTS

CD-K477W

■ Front panel

11.

(CD) Disc Tray

12.

(CD) Disc Number Select Buttons

13.

(CD) Disc Skip Button

14.

(CD) Open/Close Button

15.

Dolby Pro Logic Indicator

16.

(CD) Disc Number Indicators

17.

(TAPE 2) Direction Indicators

18.

(TAPE 2) Reverse Mode Indicator

19.

(CD) Play Indicator

10.

(CD) Repeat Indicator

11.

(CD) Pause Indicator

12.

(TAPE 2) Record Indicator

13.

Timer Record Indicator

14.

Timer Play Indicator

15.

4-Speaker Indicator

16.

Sleep Indicator

17.

Extra Bass Indicator

18.

Random Play Indicator

19.

(CD/TUNER) Memory Indicator

20.

(TUNER) FM Stereo Indicator

21.

(TUNER) FM Stereo Mode Indicator

22.

Spectrum Analyzer

23.

Function Selector Buttons

24.

Surround Mode Selector Buttons

25.

Extra Bass Button

26.

Volume Control

27.

On/Stand-by Button

28.

Headphone Socket

29.

Karaoke Maker Switch

30.

Microphone Sockets

31.

Microphone Level Controls

32.

Digital Echo Control

33.

Equalizer Selector/Demo Mode Button

34.

Clock Button

35.

Sleep Button

36.

(TAPE 2) Reverse Mode Button

37.

(CD) Pause Button

38.

Jog Dial

39.

(CD/TAPE) Stop Button

40.

(TAPE) Record Pause Button

41.

Sub Woofer Level Control Buttons

42.

Timer Button

43.

Memory Button

44.

(CD) Clear Button

45.

(CD) Track Down/Review Button

(TAPE 2) Fast Wind Button

(TUNER) Tuning Down Button

46.

(TAPE 2) Reverse Play Button

47.

(CD) Play/Repeat Button

(TAPE 1) Play Button

(TAPE 2) Forward Play Button

48.

(CD) Track Up/Cue Button

(TAPE 2) Fast Wind Button

(TUNER) Tuning Up Button

49.

Editing Speed Selector Buttons

123 4

56 7 8

9 10 11 12

13 14 15 16 17

20 21 22

23 25 26

27 28 29 30 31 32 33

34 35 36 37 38 39 40 41

42 43 44 45 46 47 48 49

– 5 –

CD-K477W

11.

(TAPE 1) Cassette Compartment

12.

(TAPE 2) Cassette Compartment

■ Rear panel

11.

CD Digital Output Socket

12.

Video/Auxiliary (Audio Signal) Input Sockets

13.

Span Selector Switch

14.

FM 75 Ohms Aerial Terminal

15.

Aerial Earth Terminal

16.

SW1/SW2/MW Aerial Terminal

17.

AC Voltage Selector

18.

AC Power Lead

19.

Front Speaker Terminals

10.

Sub Woofer Terminals

11.

Surround Speaker Terminals

12.

Centre Speaker Terminals

FRONT

SPEAKERS SUB

WOOFER

RATED SPEAKER IMPEDANCE:

8 OHMS MIN.

RIGHT LEFT

SURROUND

SPEAKERS CENTER

SPEAKER

RIGHT

RATED SPEAKER

IMPEDANCE:

16 OHMS MIN.

RATED SPEAKER

IMPEDANCE:

8 OHMS MIN.

LEFT

1 2 3

9 10 11 12

CD-K477W

– 6 –

GBOXS0015AWM2

GBOXS0016AWM2

■ Front speaker

11. Super Tweeter

12. Tweeter

13. Woofer

14. Bass Reflex Ducts

15. Speaker Terminals

■ Sub woofer

11. Woofer

12. Bass Reflex Ducts

13. Speaker Terminals

■ Centre speaker

11. Woofer

12. Speaker Wire

■ Surround speaker

11. Woofer

12. Speaker Wire

CP-K477

CP-SW477

– 7 –

CD-K477W

■ Remote control

11.

Remote Control Transmitter LED

12.

Surround Mode Selector Buttons

13.

Test Tone Button

14.

Sub Woofer Level Control Buttons

15.

Centre Level Buttons

16.

Surround Level Buttons

● Tuner control section

17.

Preset Up/Down Buttons

● CD control section

18.

Track Up/Cue Button

19.

Track Down/Review Button

10.

Memory Button

11.

Disc Skip Button

12.

Stop Button

13.

Play/Repeat Button

14.

Pause Button

15.

Clear Button

16.

Random Button

● Tape control section

17.

(TAPE 2) Record Pause Button

18.

(TAPE 2) Reverse Play Button

19.

(TAPE 1/2) Stop Button

20.

(TAPE 1) Play Button

(TAPE 2) Forward Play Button

21.

(TAPE 2) Fast Wind Button

● Common section

22.

Extra Bass Button

23.

Equalizer Mode Button

24.

Function Selector Buttons

25.

Balance Control Buttons

26.

On/Stand-by Button

27.

Volume Up/Down Buttons

28.

Dimmer Button

5 6

15 16

17 18 19 20

CD-K477W

– 8 –

OPERATION MANUAL

SETTING THE CLOCK

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

Press the CLOCK button.

Within 5 seconds, press the MEMORY button.

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 34).

Press the MEMORY button.

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 anti-clockwise,

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".

Press the MEMORY button.

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 anti-clock-

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".

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:

①

Press the MEMORY button.

②

Perform steps 6 - 9 above.

When the unit is on:

①

Press the CLOCK button.

②

Within 5 seconds, press the MEMORY button.

③

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:

①

Perform steps 1 - 2 in the section "RESETTING THE MICRO-

COMPUTER", on page 34.

②

Perform steps 1 - 9 above.

In this example, the clock is set for the 24-hour

(0:00) system.

Jog dial

ON/STAND-BY

CLOCK

MEMORY TUNING

( )

0:00 AM 12:00 AM 0:00

– 9 –

CD-K477W

(Continued)

■

FM/MW interval (span)

The International Telecommunication Union (ITU) has estab-

lished that member countries should maintain either a 10 kHz or

a 9 kHz interval between broadcasting frequencies of any MW

station. 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:

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

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).

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.

FM/MW

(kHz)

50/9 100/10

SPAN

SELECTOR

(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.

Precautions for battery use:

●Insert the batteries according to the direction indicated in the

battery compartment.

●Replace all old batteries with new ones at the same time.

●Do not mix old and new batteries.

●Remove the batteries if they are weak or if the unit will not

be used for long periods of time. This will prevent potential

damage due to battery leakage.

Caution:

Do not use rechargeable batteries (nickel-cadmium battery, etc.).

Notes concerning use:

●Replace the batteries if the operating distance is reduced or

if the 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.

●2 "AA" size bat-

teries (UM/SUM-

3, R6, HP-7 or

similar)

0.2 m - 6 m

(8" - 20')

RESETTING THE MICROCOMPUTER

Reset the microcomputer under the following conditions:

●To erase all of the stored memory contents (clock and timer

settings, and tuner and CD presets).

●If the display is not correct.

●If the operation is not correct.

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

2Press 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.

ON/STAND-BY

EQUALIZER

/DEMO

CD-K477W

– 10 –

1 Top Cabinet 1. Screw ..................... (A1) x4 10-1

2 Side Panel 1. Screw ..................... (B1) x8 10-1

(Left/right)

3 CD Player Unit/ 1. Turn on the power supply, 10-2

CD Tray Cover open the disc tray, take out

the CD cover, and close.

(Note 1)

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

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

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

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

4 Rear Panel 2. Screw ..................... (D1) x14 10-2

5 Tuner PWB 1. Socket .................... (E1) x1 11-1

2. Screw ..................... (E2) x2

6 Main PWB 1. Flat cable ............... (F1) x2 11-1

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

(F2) x3

3. Socket...................... (F3) x4

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

Karaoke PWB

1. Screw ..................... (G1) x3 11-2

8 Front Panel 1. Flat wire ................. (H1) x1 11-2

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

Speaker Amp. PWB

1. Socket .................... (J1) x3 11-2

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

Power Supply PWB

1. Screw ..................... (K1) x6 11-3

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

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

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

12 CD Switch PWB 1. Screw ..................... (M1) x3 11-4

Headphones PWB

1. Screw ..................... (N1) x1 11-4

14 Tape Mechanism 1. Screw ..................... (P1) x6 11-4

15 Turntable 1. Screw ..................... (Q1) x1 11-5

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

16 Disc Tlay 1. Screw ..................... (R1) x2 11-5

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

17 CD Servo PWB 1. Screw ..................... (S1) x1 11-6

(Note 2) 2. Socket .................... (S2) x4

18 CD Changer 1. Screw ..................... (T1) x4 12-1

Mechanism

19 CD Mechanism 1. Screw ..................... (U1) x1 12-1

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 10-2

Figure 10-3

CD-K477W

STEP REMOVAL PROCEDURE FIGURE

Note 1:

How to open the changer manually. (Fig. 10-3)

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.

After removing the connector for the optical pickup fromthe

connector wrap the conductive aluminium foil around the

front end of connector so as to protect the optical pickup

from electrostatic damage.

Figure 10-1

CD-K477W

LOCK

LEVER

CD Tray Cover

CD ServoPWB

CD Player

Unit

( D1 ) x10

ø3 x8mm ( C3 ) x1

ø3 x8mm

Hook

( C1) x3

( C2 ) x1

( C4 ) x2

( C4 ) x1

Rear Panel

Main PWB

Front Panel

Tuner PWB

Pull

(C2) x1

(D1) x1

ø3 x10mm

(D1) x1

ø3x10mm

(D2) x2

ø3 x10mm

( B1 ) x2

ø3 x8mm

( B1 ) x4

ø3 x8mm ( B1 ) x2

ø3 x8mm

Top Cabinet

Side Panel

(Right)

Rear Panel

Side Panel

(Left)

( A1 ) x2

ø3 x12mm

( A1 ) x2

ø3 x12mm

Note 2:

– 11 –

CD-K477W

Figure 11-1

Figure 11-2

Figure 11-3

Figure 11-4

Figure 11-5

Figure 11-6

(E2) x2

ø3 x10mm

(F4) x2

ø3x10mm

(F4) x1

ø3x10mm

(F3) x2

(F1) x2

(F2) x2

(F2) x1

(F3) x2

(E1) x1

Main PWB

Tuner PWB SPEAKER

AMP. PWB

Front Panel

(J2)x5

ø3x10mm

(G1)x1

ø3x10mm

(G1)x2

ø3x10mm

Front Panel

( J2 ) x1

ø3x10mm ( H2 ) x2

ø3x10mm

( J1 ) x2

( J1 ) x1

( H1 ) x1

Speaker Amp. PWB

Karaoke

PWB

(K1)x4

ø4x8mm

(K1)x1

ø3x8mm

(K1)x1

ø3x10mm

Power Supply PWB

(M1)x3

ø3x10mm

(L3)x12

ø3x10mm

(P1)x6

ø3x10mm

(N1)x1

ø3x10mm

Open

Headphones

PWB

Display

PWB

(L1)x2

(L2)x1

Washer

Tape Mechanism

Cassette

Holder (Left/Right)

Front Panel

CD Switch PWB

( R1 ) x1

ø3 x10mm

( R1 ) x1

ø3 x10mm

( Q1 ) x1

ø3 x10mm

Turntable

Disc Tray

( Q2 ) x1

( R2 ) x1

CD Player Unit

( S1 ) x1

ø3 x10mm

( S2 ) x2

( S2 ) x2 CD Player Unit

CD Servo PWB

CD-K477W

– 12 –

CP-K477

1 Front Speaker 1. Net.......................... (A1) x1 12-2

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

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

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

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

STEP REMOVAL PROCEDURE FIGURE

CP-K477

Figure 12-2

CP-SW477

Figure 12-3

CP-SW477

1 Sub woofer 1. Net.......................... (A1) x1 12-3

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 12-1

( A3 ) x4

ø4 x16mm

Net

( A1 ) x1

( A2 ) x1 Screwdriver

Woofer

( T1 ) x4

ø3 x12mm

( U1 ) x1

ø2.6 x10mm

CD Changer

Mechanism

CD Mechanism

Shift Lever

CD Player Base

Screw driver

Woofer

Net

(A1)x1

Front Panel

(A2)x1

Tweeter

Woofer

Tweeter

Super

Tweeter (A5)x2

ø3x10mm

(A3)x2

ø3x10mm

(A4)x4

ø4x12mm

– 13 –

CD-K477W

How to remove the pickup (See Fig. 13-2)

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 13-2

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3,15,16,17 and 19 of the disassembly

method to remove the CD mechanism.

How to remove the loading motor

(See Fig. 13-1)

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

motor.

Figure 13-1

( 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

Note

After removing the connector for the optical pickup fromthe

connector wrap the conductive aluminium foil around the

front end of connector so as to protect the optical pickup

from electrostatic damage.

CD-K477W

– 14 –

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 14-1

VRM01

TAPE

SPEED

FAS

SWM1

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 Frequency

Display Setting/

Adjusting

Parts

*1. Input: Antenna, Output: TP302

*2. Input: Anetnna, Output: TP301

– 15 –

CD-K477W

Figure 15 ADJUSTMENT POINTS

Instrument

Connection

• FM RF

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

Test Stage Frequency 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 Frequency

Display Setting/

Adjusting

Parts

IF 10.7 MHz 98 MHz TT01 *1

(Turn the

core of trans-

former TT01

fully counter-

clock 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

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-K477W

– 16 –

TEST MODE

200 ms

1V/diV

IC 1 15

200 ms

1V/diV

IC 1 7

TRACKING/

ERROR

BARANCE

ADJUST

Figure 16-2 Figure 16-3

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. 16-2)

2. Tracking offset (Fig. 16-3)

3. E/F balance (tracking error balance) (Fig. 16-4)

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 16-1

Note:

Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key.

VOL. --- Last memory

BAL. --- CENTER

R.GEQ. --- FLAT

X-BAS --- OFF

Canceling method - POWER OFF

• Setting the test mode

Any one of test mode can be set by pressing several keys as follows.

<REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test

• TEST mode

Function — CD test mode

Setting of TEST mode

Indication of CD TST mode (Fig. 16-1)

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

Tracking on the spot.

SERVO OFF PLAY

Tracking on the spot.

SERVO ON PLAY STOP

0.1s

0.50 V

IC1 20 FE

0.1s

0.50 V

IC1 7 TE

FOCUS

OFF-SET

ADJUST

TRACKING

OFF-SET

ADJUST

Figure 16-4

IL is not performed.

<STOP>

– 17 –

CD-K477W

SP out L-ch Input signal is output.

(TMV01) R-ch Input signal is output.

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

(TMX111) SP out S-ch

Almost no output (only omitting component)

SP out L-ch Almost no output (only omitting component)

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

(TMX11) SP out C-ch

Input signal is output.

(TMX11) SP out S-ch

Almost no output (only omitting component)

State of set Dolby Pro Logic Dolby Pro Logic On mode

Output point Bypass mode Normal mode Phantom mode

ICC01 12 pin L-out Output enabled state Output enabled state Output enabled state

11 pin R-out Output enabled state Output enabled state Output enabled state

ICC01 9pin C-out No output Output enabled state No output

ICC01 10pin S-out No output Output enabled state Output enabled state

SP OUT L-ch Output enabled state Output enabled state Output enabled state

(TMV01) R-ch Output enabled state Output enabled state Output enabled state

SP OUT C-ch No output in MUTE (Q604) state Output enabled state No output in MUTE (Q604) state

(TMX11)

SP OUT S-ch No output in MUTE (Q603) state Output enabled state Output enabled state

(TMX11)

EXPLANATION OF DOLBY SURROUND PRO LOGIC AND EVALUATION METHOD

Test tone output

• Pro Logic ON Normal mode

Press the remote control TEST TONE button.

→Output of only L-ch →Output of only C-ch

↑ ↓

Output of only S-ch ← Output of only R-ch

The test tone (noise) is repeatedly output for output period

(2 sec).

In this case the following indication appears repeatedly.

→TEST →L-ch →C-ch

↑ ↓

S-ch ← R-ch

• Pro Logic ON Phantom mode

Press the remote control TEST TONE button.

→Output of only L-ch →Output of only R-ch

↑ ↓

← Output of only S-ch

The test tone (noise) is repeatedly output for output period

(2 sec).

In this case the following indication appears repeatedly.

→TEST → L-ch → R-ch

↑ ↓

← S-ch←

Outline

• Namely, two speakers are connected in parallel to one

amplifier.

• In the Pro Logic BYPASS mode the amplifier for C-ch (center

channel) and the amplifier for S-ch (surround channel) are in

MUTE state. The SP output is cut.

• In the normal mode of Pro Logic ON mode the amplifiers for

C-ch and S-ch are in operative state, so that the SP output

appears.

• In the Phantom mode of Pro Logic ON mode the amplifier for

C-ch is in MUTE state, so that the SP output is cut. The

amplifier for S-ch (surround) is in operative state, so that the

SP output appears

• State of element output and terminal output in specific mode

Relation between VIDEO IN input and output in Pro Logic

ON state

(1) L-ch/R-ch same phase input into VIDEO IN input jack in

VIDEO Function mode

Output point Normal mode

Output point Phantom mode

(2) L-ch/R-ch reverse phase input into VIDEO IN input jack in

VIDEO Function mode

(Reverse phase: Phase difference between L and R is 180°)

Output point Normal mode

SP out L-ch

Almost no output (only omitting component)

(TMV01) R-ch

Almost no output (only omitting component)

(TMX11) SP out C-ch

Almost no output (only omitting component)

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

Output point Phantom mode

SP out L-ch

Almost no output (only omitting component)

(TMV01) R-ch

Almost no output (only omitting component)

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

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

• Accordingly, if you want to output signal waveform to C-ch SP

out, give the same phase input into L-ch/R-ch INPUT in the

Pro Logic Normal mode.

If one of channels receives input, C-ch does not output. Only

L-ch or R-ch outputs.

• If you want to output signal waveform to S-ch SP out, you can

use either Normal mode or Phantom mode. However, 180°

reverse phase input must be given to L-ch/R-ch INPUT.

CD-K477W

– 18 –

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

SWD1 VOLUME JOG ON—OFF

SWD2 JOG ON—OFF

SWD3 X-BASS ON—OFF

SWD4 PRE EQ ON—OFF

SWD5 MENU ON—OFF

SWD12 TUNING UP/CUE ON—OFF

SWD13 STOP ON—OFF

SWD14 NORMAL EDIT ON—OFF

SWD15 HIGH EDIT ON—OFF

SWD16 REC/PAUSE ON—OFF

SWD17 F-PLAY ON—OFF

SWD19 SUB WOOFER VOLUME UP ON—OFF

SWD20 SUB WOOFER VOLUME DOWN ON—OFF

SWD24 4SP-1 ON—OFF

SWD25 4SP-2 ON—OFF

SWD27 PHANTOM ON—OFF

SWD28 NORMAL ON—OFF

SWD29 BYPASS ON—OFF

SWD30 TUNING DOWN/REWIND ON—OFF

SWD31 CD PAUSE ON—OFF

SWD32 REVERSE MODE ON—OFF

SWD33 R-PLAY ON—OFF

SWD34 CLOCK ON—OFF

SWD35 MEMORY ON—OFF

SWD36 TIMER ON—OFF

SWD37 SLEEP ON—OFF

SWD38 CLEAR ON—OFF

SWD39 VIDEO/AUX 1 ON—OFF

SWD40 VIDEO/AUX 2 ON—OFF

SWD41 TAPE 1/2 ON—OFF

SWD42 TUNER/BAND ON—OFF

SWD43 CD ON—OFF

SWD48 POWER ON—OFF

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/CLOS ON—OFF

SWF2 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 chas-

sis with no signal given.

1. In the tuner section,

( ) indicates AM

< > indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back.

( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• Parts marked with “ ” ( ) are important for

maintaining the safety of the set. Be sure to replace these

parts with specified ones for maintaining the safety and

performance of the set.

NOTES ON SCHEMATIC DIAGRAM

• Resistor:

To differentiate the units of resistors, such symbol as K and

M are used: the symbol K means 1000 ohm and the symbol

M means 1000 kohm and the resistor without any symbol is

ohm-type resistor. Besides, the one with “Fusible” is a fuse

type.

• Capacitor:

To indicate the unit of capacitor, a symbol P is used: this

symbol P means micro-micro-farad and the unit of the

capacitor without such a symbol is microfarad. As to

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 18 TYPES OF TRANSISTOR AND LED

KTA1266 GR

KTA1270Y

KTA1271 Y

KTC3199 GR

KTC3203 Y

KRA102 M

KRA109 M

KRC102 M

KRC104 M

KRC107 M

2SC535 C

2SD468 C

2SC2878 A

2SD2012

2SB1375

SLR325 MG

SLR325 VR

KL052 UL

SLR505 MC

LMKD515B

KV1236Z23

(S)(G)(D)

(1) (2) (3)

E C B

FRONT

VIEW

FRONT

VIEW

B C E

(D)(G)(S)

(3) (2) (1)

FRONT

VIEW

FRONT VIEW

– 19 –

CD-K477W

Figure 19 BLOCK DIAGRAM (1/3)

3222

10 11

PU-IN SW

XL1

16.934Hz

XIN

LD0

FIN2 JP–

CV+

SLC

SL1

FIN1

SPO

SLD

SL–

SL+

DRF

DAT

VCC1

+5V

PICKUP IN

SW4

FOCUS COIL

TRACKING COIL

SPINDEL

MOTOR

LASER

DRIVE VOLATEG

REGULATOR

SLED

MOTOR

PICKUP UNIT

IC2

LC78622K

SERVO/SIGNAL

CONTROL

+B1

IC3

M56748FP

DRIVER

IC1

LA9241M

SERVO AMP.

+B1

+12V(+B5)

RES. CQCK. COIN

SQOUT. RWC. WRQ

CL, DAT, SELIAL CONTROL/CE Q93

Q91

SL+. SL–. DRF

GND (D)

MECHA UP

GND (D)

DISK NO.

OPEN/CLOSE

GND (D)

M–

M+

GND (M)

CNP10

+5V

+B1

62 64 45 3623 43

10 10

265853

5352515431302923271615

4144

Q1 Q52

+4.3V Q81 +7.3V (+B9)

REGULATOR

TO MAIN SECTION

IC81

TA7291S

LORDING MOTOR

DRIVER

XOUT

EFMO

EFMIN

CLV+

JP–

CONT2

CONT1

CONT4

DOUT

LCHO

RCHO

VVDD

VDD

LVDD

RVDD

XVDD

SW1

OPEN/CLOSE

SW2

MECHA UP

SW3

DISC No.

SOLM1

TO MAIN

SECTION

CNS10

CD-K477W

– 20 –

Figure 20 BLOCK DIAGRAM (2/3)

Q365

QG04

QL19

SO301

ANTENNA

TERMINAL

GND

SW1

SW2

B.P.F

BFT01

ICT01

TA7358AP

FM FRONT END

5 8

OSC

LT01

LT02

QT01

AMP

T302

MW ANT. T306

MW OSC.

SW1/SW2

ANT.

T303

T304 T307

T308

Q306

Q307

Q308

Q309

SW1 +B

PB HEAD

L-CH

R-CH

REC/PB

HEAD

L-CH

R-CH

P.B

AC BIAS

P.B

REC

TAPE 2

TAPE 1

L NF

L(T1)

R(T1)

L(T2)

R(T2)

R NF

POP REDUCE

L REC

R REC

REF

+B7

H/N

T1/T2

P.B.

REC

NOR/

HIGH T1/T2

12 15 19 11

ERASE

HEAD BIAS OSC.

T1/T2

HI SPEED

SWITCHING

QK28

LK04

QK03 QK05

QK04 QK06

QK17,QK18

QK09 QK07

QK08

ICK01

AN7345K

PLAYBACKuRECORD AMP

QK19

SOLENOID

DRIVER

SOLM1

SOLENOID

T1/T2 CrO

T1/T2 PLAY

QL15

QL19

FROM CD UNIT

F.A.S.

SWM5

SWM6

CAM SW

SWM3

REC FWD

SWM4

REC RVS

+B6

HI SPEED

TAPE MOTOR T2 CrO2

+B6 MOTOR

DRIVER

QL14

QL18

QL12

VRM1

TAPE SPEED

QL11

QL13 SWITCHING

TA2F/R SPEED

SWITCHING

DRIVER

DRIVER QL17

MM1

TAPE MOTOR

31 10 25

VR602

MIC2 VOL VR601

MIC1 VOL VR603

DIGITL

ECHO

IC601

M65845FP

MIC AMP.

+B7

JR11

AUX-1/

VCR-1

JR12

AUX-2/

VCR-2

ICS03

NJM4565M

PRO LOGIC

AMP

+B7

CAM SW

PHM1 T2_RUN

T2_A_FP

BAIS

SWITCHING SWITCHING

HI SPEED

QK26QK24

QK27

QK25

REC

MUTING

QK21

QK22

T2 CrO2

QK30 QK29

QK40

QD01

QD02 PB MUTE

MUTING

QK15

QK16

L NF

R NF

QK13

QK14

QG05

REC

VDD

232

+B7

VCC IN

OUT L

OUT

OUT L

QU01

QU02 CD MUTE

FM +B

+B7

Q360

SW2 +B

Q362

+B7

MW +B +B7

Q363 +B7

Q364

FM IF

TT01

FM IF

CF302

GND

AM IF

T351 CF352

FM IN

AM IN

+B7

STEREO

OSC

X352

4.5MHz

FM IF IN

+B7

VCC

OUT

VR351

FM MUTE LEVEL

MONO/ST

FM MONO/ST

OUT

IF IN

+B7

+5V

VOLTAGE

REGURATER

IC302

LC72131

PLL CONTROLLER

IC303

LA1832 FM/AM IF+MPX

X351CF351

AM IN

5 1 2 3 4 8 9

17 18 16

15 14 12 10

22 23 24

22 15

16 11 10 12 17

AFC

AM RF IN

Q364

Q353

Q354

MUTING

27 21 49 62 22 26

10 46

11 47

486

AUX2

AUX1

TAPE

TUNER

GRAPHIC EQUALIZE

R L 2

R L 1

R L 3

LVref RVref

OUT Vref

FMOSC

T2_A-FP

TA_SPEED(M)

TA_BAIS

BEET CUT

TA R/P

TA_PB-EQ

HIGH SPEED

TAPE MOTOR

TAPE SOLENOID

CAM_SW

T2_CrO2

T1_CrO2

T2_B-FP

T2_RUN

T1_RUN

SPE1~5

1–B6

ICH11(1/2)

BUFFER AMP.

NJM4558M

ICH11(/2)

SPE IN

Q631

MIC1

MIC2

GND

VOLUME

+B7

VOLTAGE

REGULATOR

MIC

LC75

AUDIO PR

OUT

REC-IN

P.B

OUT

TUNER M

TUN

PB-EQ

SW1/SW2

OSC.

OSC

REG IN

LRR

QK11

QK10

REC/PB

VOICE CA

TA_T1/T2

PB MUT

REC_MUTE

Vss

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Sharp CD-K477W User manual

Brand: Sharp

Model: CD-K477W

Category: CD players

Type: User manual

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Sharp CD-K477W User manual

Sharp CD-K477W User manual

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