Jvc KDG 638 Service Manual

Page 1

JVB
SERVICE MANUAL

CD RECEIVER

KD-G631E,KD-G631 EX,KD-G631 EU,

KD-G631 EY,KD-G632E,KD-G632 EX,

KD-G632EU,KD-G632EY,KD-G635U,
KD-G635UN,KD-G635UH,KD-G635UT,

WMA MP3 (for europe)

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
er used in the board (material : Sn-Cu, melting point: 230 Centigrade)

TABLE OF CONTENTS

1 PRECAUTIONS ....................................................................... 1-3
2 SPECIFIC SERVICE INSTRUCTIONS ...................................................... 1-6

3 DISASSEMBLY ....................................................................... 1-7
4 ADJUSTMENT ....................................................................... 1-10
5 TROUBLESHOOTING ................................................................. 1-11
COPYRIGHT © 2007 Victor Company of Japan, Limited No_MA292

2007/1

Page 2

SPECIFICATION

AUDIO AMPLIFIER SECTION

Maximum Power Output

Front/Rear

50 W per channel

Continuous Power Output
(RMS)

Front/Rear

19 W per channel into 4 Q, 40 Hz to 20 000 Hz at no more than 0.8% total har-
monic distortion.

Load Impedance

4 £2 (4 £2 to 8 Q allowance)

Tone Control Range

Bass 112 dB at 60 Hz
Mid-range 112 dB at 1 kHz
Treble 112 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 k9 load (full scale)
Output Impedance 1 kn

Other Terminals

CD changer, Steering wheel remote input, USB input jack

TU

NER SECTION

Frequency Range

FM

87.5 MHZ to 108.0 MHZ

AM (for europe)

MW: 522 kHz to 1 620 kHZ

LW: 144 kHZ to 279 kHz

AM (for asia)

531 kHz to 1 602 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 pV/75 S2)
50 dB Quieting Sensitivity 16.3 dBf (1.8 uV/75 9)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB

MW Tuner (for europe) Sensitivity/Selectivity 20 pV/35 dB

LW Tuner (for europe) Sensitivity 50 pV

AM Tuner (for asia) Sensitivity 20 pV
Selectivity 35 dB

CD PLAYER I USB MEMORY SECTION

Type

Compact disc player

Signal Detection System

Non-contact optical pickup (semiconductor laser)

Number of Channels

2 channels (stereo)

Frequency Response

5 H210 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

Playable USB memory Format FAT 12/16/32
Storage Less than 4 GB (1 partition type)
Playable Audio Format MP3/WMA
Max. Current Less than 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 x H x D)
(approx.)

Installation Size

182 mm><52 mm><150 mm

Panel Size

188mm><58 mm><12mm

Mass

1.4 kg (excluding accessories)

Design and specifications are subject to change without notice.

1-2 (N0.MA292)