JVC RCEX-30-B Service manual

SERVICE MANUAL

CD PORTABLE SYSTEM

MB27920046

RC-EX30B

SERVICE POLICY

No service part is available for this model.
Exchange only.

P

RO

GR

AM

/

CL

OCK

S

ET

PR

ES

E

T

D

O

W

P

R

E

S

E

T

N

U

P

H

B

S

/

P

R

E

S

ET

E

STANDBY/ON

DISPLAY

HBS/

PRESET EQ

FM MODE
/BEAT CUT

UP

PRESET

DOWN

CD/

TUNER/

RANDOM

BAND

123

456

789

0

PROGRAM/

INTRO

CLOCK SET

REPEAT

MUTING

TAPE

OVER

+

GROUP

–

VOLUME

G

R

O

U

TAP

P

E

RANDOM

CD

TUNER

REMOTE
SENSOR

B

AN

D

PUSH

DISPLAY

E

S

AU

Y/P

PLA

Q

OP

ST

RM-SRCEX30J REMOTE CONTROL

Area suffix

A ------------------------ Australia
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe
EV ------------- Eastern Europe

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

COPYRIGHT © 2004 Victor Company of Japan, Limited

No.MB279

2004/6

SPECIFICATION

CD player CD capacity 1 CD

Signal-to-noise ratio 75 dB

Dynamic range 60 dB

Tuner Frequency range FM 87.5 - 108.0 MHz

AM 522 - 1 629 kHz

Antennas Telescopic antenna for FM

Ferrite core antenna for AM

Cassette deck Frequency response 60 Hz - 10 000 Hz

Wow & flutter 0.15% (WRMS)

Fast wind time Approx. 150 sec. (C-60 cassette)

General Speakers 9 cm cone × 2

Speaker impedance 4 Ω
Output power 4 W (2 W + 2 W) at 4 Ω (10% THD)
Output terminals PHONES × 1
Power supply AC 230 V , 50 Hz DC 9 V (R20 (SUM-1)/D (13D)-size batteries × 6)

Power consumption 18 W (at operation) 3 W (on standby)

Dimensions 420 mm × 178 mm × 250 mm (W/H/D)

Mass Approx. 3.2 kg (without batteries)

Design and specifications are subject to change without notice.

1-2 (No.MB279)

SECTION 1

PRECAUTION

This service manual does not describe PRECAUTION.

(No.MB279)1-3

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-4 (No.MB279)

SECTION 3

DISASSEMBLY

3.1 Main body

3.1.1 Removing the rear cover assembly section
(See Fig.1 to 3)

(1) Remove the eight screws A, the three screws B and the

four screws C attaching the rear cover assembly on the
back of the body.

(2) Remove the battery cover on the back of the body and re-

move the two screws D attaching the rear cover assembly.

(3) Move the rear cover assembly in the direction of the arrow

and remove. At this time, disconnect the wire from connec­tor CN406

and FM-ANT on the main board.

A

C

B

C

A

D

A

Tuner board

D

Battery cover

Fig.1

Top cover assembly

Rear cover assembly

Main board

FM-ANT

Fig.2

Front panel assembly

CN406

Fig.3

(No.MB279)1-5

3.1.2 Removing the top cover assembly section and the front panel assembly section
(See Fig.4 to 8)

• Prior to performing the following procedure, remove the rear

cover assembly.
(1) Release the tab a of the handle using a screwdriver. Return

the handle below and pull out in the direction of the arrow.

(2) Disconnect the wire from connector CN404

nector on the main board.

(3) Remove the six screws E and the two screws F attaching

the top cover.

(4) Draw out the top cover assembly from the front panel as-

sembly section backward.

(5) Disconnect the wire from connector CN501

the main board, and disconnect the card wire from connec­tor CN507

(6) Disconnect the wire from board connector CON301 of the

cassette mechanism assembly.

and CN508.

and 4pin con-

and CN506 on

Top cover assembly

E

E

EE

Fig.6

tab a

Top cover assembly

Handle

Fig.4

Front panel assembly

tab a

CD door

Fig.7

Cassette mechanism board

CON301

F

Main board

CN508,CN507

Main board

CN501,CN506

Main board

1-6 (No.MB279)

CN404

4pin connector

Fig.5

Fig.8

3.1.3 Removing the main body

(See Fig.9, 10)

Caution:

Make sure to solder the short-circuit point on the CD servo
board before disconnecting the card wire from connector

on the main board and from the CD servo board. If you

CN201

don't observe this instruction, the pickup may be damaged.
(1) Remove the eight screws G attaching the main board on

the top cover assembly.

(2) Disconnect the wire from connector CN501

, CN202, CN401 and CN504 on the main board.

CN511

(3) Disconnect the card wire from connector CN201 on the

main board.

Caution:

If necessary, cut the band.

, CN502,

G

CN501

CN504

CD servo board

CN502

CN201

CN202

Fig.9

G

Band

CN511

CN401

GGG

Unsolder

Fig.10

Short-circuit point

(No.MB279)1-7

3.1.4 Tuner board
(See Fig.11)

• Prior to performing the following procedure, remove the main

board.
(1) Remove the three screws H attaching the tuner board.

3.1.5 Removing the top switch board
(See Fig.12)

• Prior to performing the following procedure, remove the main

board and the tuner board.
(1) Remove the four screws J attaching the top switch board.

H

Tuner board

H

Fig.11

Top switch board

J

1-8 (No.MB279)

J

Fig.12

3.1.6 Removing the volume board and the power switch board

(See Fig.13 to 16)

• Prior to performing the following procedure, remove the main

board.
(1) Remove the three screws K attaching the volume board.
(2) Pull out the volume board from the volume knob.
(3) Remove the four screws L attaching the cover on the side

of the power switch.

(4) Release the three tabs b of the cover on the side of the

power switch.

(5) Remove the three screws M attaching the power switch

board to the cover.

Caution:

If necessary, unsolder the solder points.

Ta b b

Volume board

K

Volume knob

Top cover assembly

K

Solder point

Fig.13

Switch board

Side top cover

Side top cover

L

Fig.15

Fig.16

M

Switch board

Solder point

M

Power switch board

Volume board

Solder point

K

K

Fig.14

(No.MB279)1-9

3.1.7 Removing the CD mechanism assembly
(See Fig.17)

• Prior to performing the following procedure, remove the main

board.
(1) Remove the four screws N attaching the CD mechanism

assembly.

CD mechanism

assembly

Top cover assembly

N

N

Fig.17

1-10 (No.MB279)

3.1.8 Removing the cassette mechanism assembly

(See Fig.18 ~ 21)

(1) Remove the four screws P attaching the cassette mecha-

nism cover.

(2) Remove the four screws Q attaching the cassette mecha-

nism assembly.
(3) Push Eject button to open the cassette door.
(4) Pull out the cassette mechanism assembly in the direction

of arrow.
(5) Remove the six screws R attaching the operation board.

Cassette mechanism cover

PP

Fig.18

Cassette mechanism assembly

QQ

Fig.19

Cassette door

R

EJECT button

Fig.20

Button

Cassette mechanism assembly

Fig.21

(No.MB279)1-11

3.1.9 Removing the LCD & switch board
(See Fig.22)

• Prior to performing the following procedure, remove the cas-

sette mechanism assembly.
(1) Remove the eight screws S attaching the LCD & switch

board.

3.1.10 Removing the speaker
(SeeFig.23)

(1) Remove the six screws T attaching the speaker bracket.
(2) Peel the tape and glue off attaching the speaker cord.

Caution:

The band comes off when you remove the speaker.

S

LCD & switch board

Fig.22

Speaker Speaker

S

Band

T

Ta pe

Glue

Speaker bracket

Fig.23

Tape

T

1-12 (No.MB279)

3.1.11 Removing the power transformer and the battery board

(See Fig.24, 25)

(1) Remove the two screws U attaching the power transform-

er.
(2) Remove the two screws V attaching the power socket.
(3) Remove the support board attaching the battery board.
(4) Release the tab d setting the battery board and pull out the

battery board.
(5) If necessary, unsolder the solder points.

Caution:

When you remove the power transformer, the band setting the
cord to the screw hole comes off.

U

Battery board

V

Support board

Fig.24

Ta pe

Solder point

Battery board

Ta b d

Fig.25

(No.MB279)1-13

SECTION 4

ADJUSTMENT

This service manual does not describe ADJUSTMENT.

1-14 (No.MB279)

5.1 Block diagram

SECTION 5

TROUBLESHOOTING

DRAM

HY51181

FLASH

ROM

MX29F040

REMOTE

CONTROL

KEY BOARD

REMOTE
SENSOR

MCU

4K76

LCD

PLL

TC9257

SOURCE

SELECTOR

TC9422

TUNER
TA2149

SPEAKER

PHONE

POWER AMP

TA8227

ESS 3890

DSP

TC9462

CD SERVO

TA2092

D/A

P18211

HCF4052

CD

PICKUP

TAPE

AN7312

DC SUPPLY

BATT 6x1.5V

POWER
SUPPLY

AC IN

CD RF AMP

TA2153

(No.MB279)1-15

5.2 Standard schematic diagrams

5.2.1 Amp section

1-16 (No.MB279)

(No.MB279)1-17

5.2.2 Micon section

1-18 (No.MB279)

(No.MB279)1-19

5.2.3 CD section

1-20 (No.MB279)

(No.MB279)1-21

5.2.4 MP3 section

1-22 (No.MB279)

(No.MB279)1-23

5.2.5 Cassette section

1-24 (No.MB279)

(No.MB279)1-25

5.2.6 Tuner section

1-26 (No.MB279)

(No.MB279)1-27

Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.MB279)

Printed in Japan

WPC