JVC KD-G351, KD-G357, KD-G440, KD-G441, KD-G447 Service manual

SERVICE MANUAL

COPYRIGHT © 2007 Victor Company of Japan, Limited

No.MA377<Rev.001>

2007/12

CD RECEIVER

MA377<Rev.001>200712SERVICE MANUAL

KD-G351E, KD-G351EX, KD-G351EY, KD-G351EU,

KD-G357EE, KD-G440J, KD-G441E, KD-G441EX,

KD-G441EY, KD-G441EU, KD-G447EE, KD-G644UI,

KD-G645U, KD-G645UN, KD-G645UT, KD-G645UH,

KD-G646U, KD-G646UN, KD-G646UT, KD-G646UH,

KD-G648UF

COPYRIGHT © 2007 Victor Company of Japan, Limited

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

except

KD-G441

KD-G351

KD-G447

KD-G357

only

KD-G441

KD-G351

KD-G447

KD-G357

only

KD-G440

1-2 (No.MA377<Rev.001>)

SPECIFICATION

KD-G441/KD-G351

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output (RMS) Front/Rear 19 W per channel into 4 Ω 40 Hz to 20 000 Hz at no

more than 0.8% total harmonic distortion

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Tone Control Range Bass ±12 dB at 60 Hz

Middle ±12 dB at 1 kHz

Treble ±12 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal to Noise Ratio 70 dB

Audio Output Level (for KD-G441) Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Output Impedance 1 kΩ

Subwoofer-Out Level/Impedance 2.5 V /20 kΩ load (full scale)

Other Terminals AUX (auxiliary) input jack USB input jack Steering wheel remote input (forKD-G441)

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM MW: 522 kHz to 1 620 kHz

LW: 144 kHz to 279 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

MW Tuner Sensitivity/Selectivity 20 µV/35 dB

LW Tuner Sensitivity 50 µV

CD PLAYER SECTION

Type Compact disc player

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 Decoding Format: (MPEG1/2 Audio Layer 3)

Max. Bit Rate 320 kbps

WMA (Windows Media® Audio) Decoding Format

Max. Bit Rate 320 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate (Full Speed) Max. 12 Mbps

Storage Less than 8 GB (1 partition type)

Compatible Device Mass storage class (except HDD)

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA

Max. Current 500 mA

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C

Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 160 mm

Panel Size (approx.) 188 mm × 58 mm × 13 mm

Mass (approx.) 1.3 kg (excluding accessories)

(No.MA377<Rev.001>)1-3

KD-G447/KD-G357

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output (RMS) Front/Rear 19 W per channel into 4 Ω 40 Hz to 20 000 Hz at no

more than 0.8% total harmonic distortion

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Tone Control Range Bass ±12 dB at 60 Hz

Middle ±12 dB at 1 kHz

Treble ±12 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal to Noise Ratio 70 dB

Other Terminals AUX (auxiliary) input jack, USB input jack

TUNER SECTION

Frequency Range FM1/FM2 87.5 MHz to 108.0 MHz

FM3 65.00 MHz to 74.00 MHZ

AM MW: 522 kHz to 1 620 kHz

LW: 144 kHz to 279 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

MW Tuner Sensitivity/Selectivity 20 µV/35 dB

LW Tuner Sensitivity 50 µV

CD PLAYER SECTION

Type Compact disc player

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 Decoding Format: (MPEG1/2 Audio Layer 3)

Max. Bit Rate 320 kbps

WMA (Windows Media® Audio) Decoding Format

Max. Bit Rate 320 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate (Full Speed) Max. 12 Mbps

Storage Less than 8 GB (1 partition type)

Compatible Device Mass storage class (except HDD)

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA

Max. Current 500 mA

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C

Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 160 mm

Panel Size (approx.) 188 mm × 58 mm × 13 mm

Mass (approx.) 1.3 kg (excluding accessories)

1-4 (No.MA377<Rev.001>)

KD-G440

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Power Output 20 W RMS × 4 Channels at 4 Ω and < or = 1% THD+N

Signal-to-Noise Ratio 80 dBA (reference: 1 W into 4 Ω)

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Tone Control Range Bass/Mid-range/Treble ±12 dB at 60 Hz/1 kHz/10 kHz

Frequency Response 40 Hz to 20 000 Hz

Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Output Impedance 1 kΩ

Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Other Terminal AUX (auxiliary) input jack USB input jack Steering wheel remote input

TUNER SECTION

Frequency Range FM

87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)

87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)

AM

530 kHz to 1 710 kHz (with channel interval set to 10 kHz)

531 kHz to 1 602 kHz (with channel interval set to 9 kHz)

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 35 dB

AM Tuner Sensitivity/Selectivity 20 µV/35 dB

CD PLAYER SECTION

Type Compact disc player

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 Decoding Format: (MPEG1/2 Audio Layer 3)

Max. Bit Rate 320 kbps

WMA (Windows Media® Audio) Decoding Format

Max. Bit Rate 320 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate (Full Speed) Max. 12 Mbps

Storage Less than 8 GB (1 partition type)

Compatible Device Mass storage class (except HDD)

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA

Max. Current 500 mA

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)

Dimensions (W × H × D): (approx.) Installation Size

182 mm

×

52 mm

×

160 mm (7-3/16”

×

2-1/16”

×

6-5/16”)

Panel Size 188 mm × 58 mm × 6 mm (7-7/16” × 2-5/16” × 1/4”)

Mass 1.3 kg (2.9 lbs) (excluding accessories)

(No.MA377<Rev.001>)1-5

KD-G644

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output (RMS) Front/Rear 19 W per channel into 4 Ω 40 Hz to 20 000 Hz at no

more than 0.8% total harmonic distortion.

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Tone Control Range Bass ±12 dB at 60 Hz

Mid-range ±12 dB at 1 kHz

Treble ±12 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Output Impedance 1 kΩ

Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Other Terminal AUX (auxiliary) input jack, USB input jack

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM 531 kHz to 1 602 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

AM Tuner Sensitivity/Selectivity 20 µV/35 dB

CD PLAYER SECTION

Type Compact disc player

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 Decoding Format: (MPEG1/2 Audio Layer 3)

Max. Bit Rate 320 kbps

WMA (Windows Media® Audio) Decoding Format

Max. Bit Rate 320 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate (Full Speed) Max. 12 Mbps

Storage Less than 8 GB (1 partition type)

Compatible Device Mass storage class (except HDD)

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA

Max. Current 500 mA

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C

Dimensions (W × H × D): (approx.) Installation Size 182 mm × 52 mm × 160 mm

Panel Size 188 mm × 58 mm × 6 mm

Mass 1.3 kg (excluding accessories)

1-6 (No.MA377<Rev.001>)

KD-G646/KD-G645

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output (RMS) Front/Rear 19 W per channel into 4 Ω 40 Hz to 20 000 Hz at no

more than 0.8% total harmonic distortion.

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Tone Control Range Bass ±12 dB at 60 Hz

Mid-range ±12 dB at 1 kHz

Treble ±12 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Output Impedance 1 kΩ

Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Other Terminal AUX (auxiliary) input jack, USB input jack

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM 531 kHz to 1 602 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

AM Tuner Sensitivity/Selectivity 20 µV/35 dB

CD PLAYER SECTION

Type Compact disc player

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 Decoding Format (MPEG1/2 Audio Layer 3)

Max. Bit Rate 320 kbps

WMA (Windows Media

®

Audio) Decoding Format

Max. Bit Rate 320 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate Full Speed) Max. 12 Mbps

Storage Less than 8 GB (1 partition type)

Compatible Device Mass storage class (except HDD)

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA

Max. Current 500 mA

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C

Dimensions (W × H × D) (approx.) Installation Size 182 mm × 52 mm × 160 mm

Panel Size 188 mm × 58 mm × 6 mm

Mass 1.3 kg (excluding accessories)

(No.MA377<Rev.001>)1-7

KD-G648

Design and specifications are subject to change without notice.

AUDIO AMPLIFIER SECTION

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output (RMS) Front/Rear 19 W per channel into 4 Ω 40 Hz to 20 000 Hz at no

more than 0.8% total harmonic distortion.

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Tone Control Range Bass ±12 dB at 60 Hz

Mid-range ±12 dB at 1 kHz

Treble ±12 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Output Impedance 1 kΩ

Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)

Other Terminal AUX (auxiliary) input jack, USB input jack

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM 531 kHz to 1 602 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz)

65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

AM Tuner Sensitivity/Selectivity 20 µV/35 dB

CD PLAYER SECTION

Type Compact disc player

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 Decoding Format (MPEG1/2 Audio Layer 3)

Max. Bit Rate 320 kbps

WMA (Windows Media® Audio) Decoding Format

Max. Bit Rate 320 kbps

USB SECTION

USB Standard USB 1.1, USB 2.0

Data Transfer Rate Full Speed) Max. 12 Mbps

Storage Less than 8 GB (1 partition type)

Compatible Device Mass storage class (except HDD)

Compatible File System FAT 32/16/12

Playable Audio Format MP3/WMA

Max. Current 500 mA

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C

Dimensions (W × H × D) (approx.) Installation Size 182 mm × 52 mm × 160 mm

Panel Size 188 mm × 58 mm × 6 mm

Mass 1.3 kg (excluding accessories)

1-8 (No.MA377<Rev.001>)

SECTION 1

PRECAUTION

1.1 Safety Precautions

!

Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

!

Please use enough caution not to see the beam directly or touch it in case of an

adjustment or operation check.

(No.MA377<Rev.001>)1-9

1.2 Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser

diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.

Be careful to use proper grounding in the area where repairs are being performed.

(1) Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the

traverse unit (optical pickup) on it.

(2) Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(3) Handling the optical pickup

• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical

pickup are shorted. After replacement, return the shorted parts to their original condition.

(Refer to the text.)

• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily

destroy the laser diode.

1.3 Handling the traverse unit (optical pickup)

(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the

replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a

time when attaching it to the connector.

(3) Handle the flexible cable carefully as it may break when subjected to strong force.

(4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.4 Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the pickup unit.

• Apply solder to the short land before the card wire is disconnected from the connector on the pickup unit.

(If the card wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)

• In the assembly, be sure to remove solder from the short land after connecting the card wire.

1M

(caption)

Anti-static wrist strap

Conductive material

(conductive sheet) or iron plate

Traverse mechanism assembly

Pickup

Short land section

Card wire

Connector

1-10 (No.MA377<Rev.001>)

1.5 Important for laser products

1.CLASS 1 LASER PRODUCT

2.CAUTION :

(For U.S.A.) Visible and/or invisible class II laser radiation

when open. Do not stare into beam.

(Others) Visible and/or invisible class 1M laser radiation

when open. Do not view directly with optical instruments.

3.CAUTION : Visible and/or invisible laser radiation when

open and inter lock failed or defeated. Avoid direct

exposure to beam.

4.CAUTION : This laser product uses visible and/or invisible

laser radiation and is equipped with safety switches which

prevent emission of radiation when the drawer is open and

the safety interlocks have failed or are defeated. It is

dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of

procedures other than those specified here in may result in

hazardous radiation exposure.

REPRODUCTION AND POSITION OF LABELS and PRINT

!

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

WARNING LABEL and PRINT

(No.MA377<Rev.001>)1-11

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

SECTION 3

DISASSEMBLY

3.1 Main body (used figure is KD-G440)

3.1.1 Removing the FRONT CHASSIS assembly (See Fig.3-1)

(1) Disengage the four hooks a engaged the both side of the

FRONT CHASSIS assembly.

Fig.3-1

3.1.2 Removing the HEAT SINK (See Fig.3-2, 3-3)

(1) Remove the three screws A and the two screws B attaching

the HEAT SINK. (See Fig.3-2)

(2) Remove the two screws C and the one screw D attaching

the HEAT SINK. (See Fig.3-3)

Fig.3-2

Fig.3-3

hook

a

A

B

C

D

1-12 (No.MA377<Rev.001>)

3.1.3 Removing the BOTTOM COVER (See Fig.3-4)

(1) Remove the one screw E and the one screw F attaching

the BOTTOM COVER.

(2) Slide the BOTTOM COVER to backward.

Fig.3-4

3.1.4 Removing the MAIN BOARD assembly (See Fig.3-5, 3-6)

(1) Remove the two screws G and the two screws H attaching

the MAIN BOARD assembly. (See Fig.3-5, 3-6)

(2) Disconnect the connector CN501

connected to MAIN

BOARD assembly and CD MECHANISM assembly. (See

Fig.3-6)

Fig.3-5

Fig.3-6

E F

G

H

CN501

(No.MA377<Rev.001>)1-13

3.1.5 Removing the CD MECHANISM assembly (See Fig.3-7)

(1) Remove the three screws J attaching the CD MECHANISM

assembly.

Fig.3-7

3.1.6 Removing the SWITCH BOARD assembly (See Fig.3-8)

(1) Remove the VOLUME KNOB.

(2) Remove the four screws K attaching the REAR COVER.

(3) Disengage the nine hooks b engaged the REAR COVER.

Fig.3-8

J

J

hook b

hook b

K

K

1-14 (No.MA377<Rev.001>)

3.2 CD mechanism assembly

3.2.1 Removing the top cover

(See Figs.1 and 2)

(1) From the both side of the CD mechanism assembly, remove

the four screws A attaching the top cover. (See Fig.1.)

(2) Lift the front side of the top cover and move the top cover

backward to release the two joints a. (See Figs.1 and 2.)

Fig.1

Fig.2

A

A

A

a

Top cover

A

a

Top cover

(No.MA377<Rev.001>)1-15

3.2.2 Removing the push switch

(See Figs.3)

(1) From the bottom side of the CD mechanism assembly, remove

the screw B attaching the push switch.

(2) Take out the push switch from the CD mechanism assembly.

Reference:

Remove the wires from soldered sections b of the push switch

as required.

3.2.3 Removing the base board

(See Figs.3 and 4)

Caution:

Solder the short land c before the flexible wire is disconnected from

the connector on the pickup. If the flexible wire is disconnected

without applying solder, the pickup may be destroyed by static

electricity. (See Fig.3.)

(1) From the bottom side of the CD mechanism assembly, remove

the screw C attaching the base board. (See Figs.3 and 4.)

(2) Solder the short land c on the pickup. (See Fig.3.)

(3) Disconnect the flexible wire from the connector on the pickup.

(See Fig.3.)

(4) Remove the base board from the joints d of the frame in the

direction of the arrow. (See Figs.3 and 4.)

Reference:

Remove the wires from the soldered sections e on the base

board as required. (See Fig.3.)

Caution:

When reattaching the base board, be sure to remove solder

from the short land c after connecting the flexible wire. (See

Fig.3.)

Fig.3

Fig.4

B

b

Wires

Push switch

Pickup

e

C

Base board

d

Pickup

c

Connector

Flexible wire

Frame

CD mechanism

assembly

C

Base board

Flexible wire

Frame

d

1-16 (No.MA377<Rev.001>)

3.2.4 Removing the chassis unit

(See Figs.5 and 6)

• Remove the top cover and base board.

(1) From the top side of the CD mechanism assembly, remove

the front suspension springs and rear suspension springs

attaching the chassis unit to the frame. (See Fig.5.)

(2) Remove the chassis unit from the dampers on the frame in

an upward direction. (See Fig.6.)

Note:

• Pay attention to misuse and loss of each spring. (See Fig.5.)

• When reassembling, make sure that the three shafts on the

underside of the chassis unit are inserted to the dampers

certainly. (See Fig.6.)

Fig.5

Fig.6

Front suspension spring

Rear suspension spring Rear suspension spring

Front suspension spring

Chassis unit

Frame

Chassis unit

Shaft

Shaft

Shaft

Damper R

Damper F

Damper F

Frame

(No.MA377<Rev.001>)1-17

3.2.5 Removing the clamper assembly

(See Figs.7 and 8)

• Remove the top cover.

Move the clamper assembly in the direction of the arrow to release

the joints f from the chassis unit.

Fig.7

Fig.8

f

f

Clamper assembly

Chassis unit

f

f

Clamper assembly

Chassis unit

1-18 (No.MA377<Rev.001>)

3.2.6 Removing the loading/feed motor assembly

(See Fig.9)

• Remove the top cover, base board and chassis unit.

From the bottom side of the chassis unit, remove the screw D

and take out the loading/feed motor assembly in the direction of

the arrow.

Reference:

Remove the wires from the soldered sections g of the loading/

feed motor assembly as required.

Fig.9

D

Loading/feed

motor

assembly

g

Loading/feed motor assembly

Chassis unit