JVC KD-AR360, KD-G310 Service Manual

SERVICE MANUAL

CD RECEIVER

MA110B20053

KD-AR360,KD-G310

Area suffix

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

KD-G310KD-AR360

LINE OUT

TEL.MUTE

REARFRONT,REAR

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

No.MA110B

2005/3

SPECIFICATION

AUDIO AMPLIFIER SECTION

Power Output 18 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 ±10 dB at 100 Hz

Treble ±10 dB at 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

Other terminals CD changer

TUNER SECTION

Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 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

Capture Ratio 1.5 dB

[AM Tuner] Sensitivity 20 µV

Selectivity 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:192 Kbps

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) Installation Size (approx.) 182 mm × 52 mm × 150 mm (7-3/16" × 2-1/16" × 5-15/16")

Panel Size (approx.) 188 mm × 58 mm × 11 mm (7-7/16" × 2-5/16" × 7/16")

Mass (approx.) 1.4 kg (3.1 lbs) (excluding accessories)

Design and specifications are subject to change without notice.

1-2 (No.MA110B)

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.MA110B)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.MA110B)

Pickup

SPECIFIC SERVICE INSTRUCTIONS

2.1 HOW TO IDENTIFY MODELS

2.1.1 NAME PLATE (as same as KD-G310)

SECTION 2

Discernment sign

(No.MA110B)1-5

SECTION 3

DISASSEMBLY

3.1 Main body

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 and remove the front panel assembly.

3.1.2 Removing the bottom cover

(See Fig.2)

(1) Turn the main body up side down. (2) Insert a screwdriver under the joints to release the two

joints a on the left side, two joints b on the right side and joint c on the back side of the main body, then remove the bottom cover from the main body.

CAUTION:

When releasing the joints using a screwdriver, do not damage the main board.

Front panel assembly

Joint a

Detach button

Fig.1

Bottom cover

Joint b

3.1.3 Removing the front chassis assembly

(See Fig.3)

• Prior to performing the following procedures, remove the front panel assembly and bottom cover. (1) Remove the screw A on the both sides of the main body. (2) Release the two joints d and two joints e on the both sides

of the main body, then remove the front chassis assembly toward the front.

1-6 (No.MA110B)

Joint a

Joint c

Fig.2

Joint d Joint e

Joint d

Front chassis assembly

Fig.3

Joint e

Joint b

3.1.4 Removing the side panel (See Fig.4)

• Prior to performing the following procedure, remove the front

panel assembly as required. (1) Remove the screw B and two screws C attaching the side

panel on the left side of the main body, and remove the side panel.

3.1.5 Removing the rear bracket (See Fig.5)

• Prior to performing the following procedure, remove the bottom

cover. (1) Remove the three screws D, four screws E and two screws

F attaching the rear bracket on the back side of the main body.

(2) Remove the rear bracket.

BCC

Side panel

Fig.4

Rear bracket

3.1.6 Removing the main board (See Fig.6)

• Prior to performing the following procedure, remove the front

panel assembly, front chassis assembly, side panel, bottom cover and rear bracket. (1) Remove the two screws G attaching the main board. (2) Disconnect the connector CN501

board.

and remove the main

Fig.5

Main board

CN501

Fig.6

(No.MA110B)1-7

3.1.7 Removing the CD mechanism assembly

(See Fig. 7)

• Prior to performing the following procedure, remove the front panel assembly, front chassis assembly, side panel, bottom cover, rear bracket, main board and CD mechanism board. (1) Remove the three screws H attaching the top chassis. (2) Take out the CD mechanism assembly.

3.1.8 Removing the front board

(See Figs.8 to 10)

• Prior to performing the following procedure, remove the front panel assembly. (1) Remove the four screws J on the back side of the front pan-

el assembly. (See Fig.8.) (2) Release the ten joints f. (See Fig.9.) (3) Release the joint g and take out the front board. (See

Fig.10.)

CD mechanism assembly

Fig.7

Fig.8

Joint f Joints f

Top chassis

Joints

1-8 (No.MA110B)

Joints f

Front board

Joints f

Fig.9

Joint g

Fig.10

Joint f

Front panel assembly

3.2 CD Mechanism Assembly

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

(1) Remove the two 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

(No.MA110B)1-9

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 connector board. (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 wire 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

1-10 (No.MA110B)

+ 22 hidden pages