JVC KD-AR5000, KD-LHX500 Service Manual

SERVICE MANUAL

CD RECEIVER

MA04320043

KD-AR5000,KD-LHX500

Area suffix

KD-AR5000

KD-LHX500

ARSENAL rogo

LINE IN

J -------------- Northern America

KD-AR5000J LHX500J

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

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

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

No.MA043

2004/3

SPECIFICATION

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

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

0.8% total harmonic distortion.

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)

Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.4 kHz, 6 kHz, 12 kHz

Level ±10 dB

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-In Level/Impedance LINE IN 1.5 V/20 kΩ load (KD-AR5000 only) Line-Out Level/Impedance KD-AR5000 5.0 V/20 kΩ load (full scale)

KD-LHX500 4.0 V/20 kΩ load (full scale)

Output Impedance 1 kΩ

Other Terminals SUBWOOFER OUT

Changer control

TUNER SECTION

Frequency Range FM 87.5 MHz to 107.9 MHz

AM 530 kHz to 1 710 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

Capture Ratio 1.5 dB

[AM Tuner] Sensitivity 20 µV

Selectivity 65 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 98 dB

Signal-to-Noise Ratio 102 dB

Wow and Flutter Less than measurable limit

MP3 (MPEG Audio Layer 3) Max. Bit rate 320 Kbps

WMA (Windows Media Audio) Max. Bit rate 192 Kbps

GENERAL

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

Grounding System Negative ground

Allowable Operating Temperature 0ºC to +40ºC (32ºF to 104ºF)

Dimensions (W × H × D) Installation Size 182 mm × 52 mm × 157.5 mm (7-3/16" × 2-1/16" × 6-1/4")

Panel Size 188 mm × 58 mm × 13 mm (7-7/16" × 2-5/16" × 9/16")

Mass 1.86 kg (4.1 lbs) (excluding accessories)

Design and specifications are subject to change without notice.

1-2 (No.MA043)

1.1 Safety Precautions

SECTION 1

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.MA043)1-3

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 CD players. 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 CD pickup unit.

• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit. (If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.)

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

Short-circuit point

(Soldering)

Flexible wire

1-4 (No.MA043)

Pickup

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MA043)1-5

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the front panel assembly

(See Fig.1)

(1) Push the detach button in the lower right part of the front

panel assembly.

(2) Remove the front panel assembly.

3.1.2 Removing the heat sink

(See Fig.2)

(1) From the left side of the main body, remove the two screws

A and three screws B attaching the heat sink.

Front panel assembly

Detach button

Fig.1

AAB

Heat sink

Fig.2

1-6 (No.MA043)

3.1.3 Removing the top chassis assembly (See Figs.3 to 6)

• Prior to performing the following procedures, remove the heat

sink.

Reference:

Remove the front panel assembly as required. (1) From the bottom side of the main body, remove the two

screws C attaching the top chassis assembly to the bottom chassis assembly. (See Fig.3.)

(2) From the both and rear sides of the main body, remove the

five screws D attaching the top chassis assembly to the bottom chassis assembly. (See Figs.4 to 6.)

(3) Lift the top chassis assembly in the direction of the arrow,

disconnect the connector CN501 trol board from the connector CN702 on the main board. (See Figs.5 and 6.)

(4) Take out the top chassis assembly from the bottom chassis

assembly.

on the mechanism con-

Bottom chassis assembly

Top chassis assembly

Fig.3

Top chassis assembly

Bottom chassis assembly

Mechanism control board

Top chassis assembly

Main board

Bottom chassis assembly

Fig.4

CN501

CN702

Fig.5

Top chassis assembly

Bottom chassis assembly

Rear bracket

Fig.6

(No.MA043)1-7

3.1.4 Removing the front chassis (See Figs.7 and 8)

• Prior to performing the following procedure, remove the front

panel assembly, heat sink and top chassis assembly. (1) From the both sides of the top chassis assembly, remove

the two screws E attaching the front chassis.

3.1.5 Removing the mechanism control board (See Fig.9)

• Prior to performing the following procedures, remove the front

panel assembly, heat sink and top chassis assembly. (1) Disconnect the card wire from the connector CN601

mechanism control board.

(2) Remove the five screws F attaching the mechanism control

board.

(3) Release the joints a and b, remove the mechanism control

board.

on the

Top chassis assembly

Front chassis

Mechanism control board

Front chassis

Fig.7

Top chassis assembly

Fig.8

CN601

1-8 (No.MA043)

Fig.9

3.1.6 Removing the CD mechanism assembly (See Fig.10)

• Prior to performing the following procedures, remove the front

panel assembly, heat sink and top chassis assembly.

Reference:

Remove the mechanism control board as required. (1) From the inside of the top chassis assembly, remove the

three screws G attaching the CD mechanism assembly.

(2) Take out the CD mechanism assembly from the top chas-

sis.

Top chassis

CD mechanism assembly

3.1.7 Removing the main board

(See Figs.11 and 12)

• Prior to performing the following procedures, remove the front

panel assembly, heat sink and top chassis assembly. (1) From the rear side of the bottom chassis assembly, remove

the two screws H attaching the rear bracket to the bottom chassis assembly. (See Fig.11.)

(2) From the top side of the bottom chassis assembly, remove

the two screws J attaching the main board to the bottom chassis assembly. (See Fig.12.)

(3) Release the stopper of the connector CN701

board in an upward direction, disconnect the card wire from the connector CN701. (See Fig.12.)

(4) Disconnect the wire from the connector of the front door

mechanism assembly. (See Fig.12.)

(5) Disconnect the wire from the connector CN991

board. (See Fig.12.)

Reference:

After connecting the wires, fix the wires with the wire holders.

(6) Take out the main board from the bottom chassis assem-

bly.

on the main

Fig.10

Fig.11

Front door mechanism assembly

Connector

Wire holder

Card wire

CN701

Rear bracket

Bottom chassis assembly

Stopper

Main board

CN991

Fig.12

Wires

(No.MA043)1-9

3.1.8 Removing the rear bracket (See Fig.13)

• Prior to performing the following procedures, remove the front

panel assembly, heat sink, top chassis assembly and main board. (1) From the rear side of the main board, remove the wires

from the rear bracket in the direction of the arrow.

(2) Remove the two screws K and three screws L attaching the

rear bracket to the main board.

Reference:

After attaching the rear bracket to the main board, pass the wires through the wire holder and insert them into the slots of the rear bracket.

Wire (KD-AR5000)

Rear bracket

Wire

Main board

Wire holder

Slots

Rear bracket

3.1.9 Removing the front door mechanism assembly (See Fig.14)

• Prior to performing the following procedures, remove the front

panel assembly, heat sink, top chassis assembly and main board. (1) From the top side of the bottom chassis assembly, remove

the screw M attaching the shaft holder to the bottom chassis.

(2) Remove the five screws N attaching the front door mecha-

nism assembly to the bottom chassis.

Reference:

When attaching the screws M and N, apply a locking agent them.

(3) Take out the front door mechanism assembly from the bot-

tom chassis.

Bottom chassis

L K

Shaft holder

Fig.13

Front door mechanism assembly

Fig.14

1-10 (No.MA043)

3.1.10 Removing the front board

(See Figs.15 to 17)

• Prior to performing the following procedures, remove the front

panel assembly. (1) From the rear side of the front panel assembly, remove the

four screws P attaching the rear cover assembly to the front panel assembly. (See Fig.15.)

(2) Release the twelve joints c of the front panel assembly and

remove the rear cover assembly. (See Fig.16.)

(3) Take out the front board from the front panel assembly.

(See Fig.17.)

Rear cover assembly

Fig.15

joints c joints c

Front panel assembly

Rear cover assembly

Fig.16

Fig.17

Front board

(No.MA043)1-11

3.2 CD Mechanism section

3.2.1 Removing the top cover (See Figs.1 and 2)

(1) Remove the four screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover

backward to release the two joints a.

Top cover

Joints a

Fig.1

Fig.2

Top cover

1-12 (No.MA043)

3.2.2 Removing the connector board

(See Figs.3 to 5)

CAUTION:

Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this instruction may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the short-circuit point on the pickup. (3) Disconnect the flexible wire from the pickup. (4) Move the connector board in the direction of the arrow to

release the two joints b.

(5) Unsolder the wires on the connector board if necessary.

CAUTION:

Unsolder the short-circuit point after reassembling.

Connector board

Flexible wire

Wires

Joints b

Short-circuit point

Fig.3

Short-circuit point

(Soldering)

Pickup

Flexible wire

Frame

Pickup

Fig.4

Connector board

Fig.5

(No.MA043)1-13

3.2.3 Removing the DET switch (See Figs.6 and 7)

(1) Extend the two tabs c of the feed sw. holder and pull out

the switch.

(2) Unsolder the DET switch wire if necessary.

DET

switch

Connector

board

Pickup

Fig.6

DET switch

Tab c

DET switch wire

Feed sw. holder

Fig.7

1-14 (No.MA043)

+ 30 hidden pages