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

...

SERVICE MANUAL

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

except KD-G441 KD-G351 KD-G447 KD-G357

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)

only KD-G441 KD-G351 KD-G447 KD-G357

KD-G440

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

No.MA377<Rev.001>

only

2007/12

SPECIFICATION

KD-G441/KD-G351

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)

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) WMA (Windows Media® Audio) Decoding Format

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

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

Mass (approx.) 1.3 kg (excluding accessories)

Design and specifications are subject to change without notice.

Max. Bit Rate 320 kbps

USB SECTION

GENERAL

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

65 dB

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

KD-G447/KD-G357

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)

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)

WMA (Windows Media® Audio) Decoding Format

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

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

Mass (approx.) 1.3 kg (excluding accessories)

Design and specifications are subject to change without notice.

Max. Bit Rate 320 kbps

USB SECTION

GENERAL

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

65 dB

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

KD-G440

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

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)

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)

WMA (Windows Media® Audio) Decoding Format

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

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

Mass 1.3 kg (2.9 lbs) (excluding accessories)

Design and specifications are subject to change without notice.

Max. Bit Rate 320 kbps

USB SECTION

GENERAL

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

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)

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)

65 dB

182 mm × 52 mm × 160 mm (7-3/16” × 2-1/16” × 6-5/16”)

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

KD-G644

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)

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)

WMA (Windows Media® Audio) Decoding Format

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

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

Mass 1.3 kg (excluding accessories)

Design and specifications are subject to change without notice.

Max. Bit Rate 320 kbps

USB SECTION

GENERAL

Panel Size 188 mm × 58 mm × 6 mm

65 dB

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

KD-G646/KD-G645

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)

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)

WMA (Windows Media® Audio) Decoding Format

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

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

Mass 1.3 kg (excluding accessories)

Design and specifications are subject to change without notice.

Max. Bit Rate 320 kbps

USB SECTION

GENERAL

Panel Size 188 mm × 58 mm × 6 mm

65 dB

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

KD-G648

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)

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)

WMA (Windows Media® Audio) Decoding Format

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

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

Mass 1.3 kg (excluding accessories)

Design and specifications are subject to change without notice.

Max. Bit Rate 320 kbps

USB SECTION

GENERAL

Panel Size 188 mm × 58 mm × 6 mm

65 dB

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

1.1 Safety Precautions

SECTION 1

PRECAUTION

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.

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

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.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

(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.

Connector

Short land section

Pickup

Card wire

Traverse mechanism assembly

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

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.

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

REPRODUCTION AND POSITION OF LABELS and PRINT

WARNING LABEL and PRINT

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

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.

hook

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

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

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.

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

BOARD assembly and CD MECHANISM assembly. (See Fig.3-6)

connected to MAIN

E F

Fig.3-4

Fig.3-5

CN501

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

Fig.3-6

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

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

assembly.

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.3-7

hook b

Fig.3-8

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

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.)

Top cover

Fig.1

Top cover

Fig.2

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

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.)

Base board

Frame

Wires

Push switch

Flexible wire

Connector

Fig.3

Pickup

CD mechanism assembly

Pickup

Base board

Flexible wire

Frame

Fig.4

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

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.)

Chassis unit

Front suspension spring

Frame

Rear suspension spring Rear suspension spring

Fig.5

Chassis unit

Shaft

Damper F

Damper R

Frame

Shaft

Fig.6

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

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.

Chassis unit

Clamper assembly

Chassis unit

Fig.7

Fig.8

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

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.

Loading/feed motor assembly

Chassis unit

Loading/feed motor assembly

Fig.9

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

+ 42 hidden pages