JVC CSBB-2-J Service manual

SERVICE MANUAL

ACTIVE SUBWOOFER SYSTEM

MA25220063

CS-BB2J, CS-BB2U

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

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

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

COPYRIGHT © 2006 Victor Company of Japan, Limited

No.MA252

2006/3

SPECIFICATION

Type Closed Active Subwoofer (Built-in amplifi er)

Speaker Unit 14 cm (5-9/16 in.) cone

Input Terminal LINE IN (1 system), 0.19 V/25 kΩ

SPEAKER (1 system), 3.7 V

Power Output 32 W RMS x 2 channels at 2 Ω and [< or =] 1% THD + N
Signal-to-Noise Ratio 75 dBA (reference: 1 W into 2 Ω)
Maximum Amplifi er Power Output 60 W + 60 W (Impedance 2 Ω + 2 Ω )

Cut-off Frequency 110 Hz (L.P.F. switch "ON", -12 dB/oct low pass fi lter)

Crossover Frequency 20 Hz to 200 Hz (L.P.F. switch "ON")

20 Hz to 500 Hz (L.P.F. switch "OFF")

Sound Pressure Level 88 dB/ m (with line input: 0.03 V)

Level Control -50 dB to 0 dB (Center) to + 10 dB

Power Requirement DC 14.4 V (11 V to 16 V allowance), Negative ground

Dimensions (W/H/D) 290 mm × 60.5 mm × 200 mm (11-7/16 in. × 2-7/16 in. × 7-7/8 in.)

Mass 2.1 kg (4.7lbs) (Excluding accessories)

Design and specifi cations are subject to change without notice.

1-2 (No.MA252)

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.

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

SECTION 3

DISASSEMBLY

3.1 Removing the almi plate
(See fig.1)

(1) Remove the six screws A, two screws B and one screw C

attaching the almi plate.

(2) Remove the almi plate from main body.

B

A

A

almi plate

C

Fig.1

(No.MA252)1-3

3.2 Removing the main board
(See fig.2 to 4)

• Remove the almi plate.

(1) Remove the five screws D and one screw D' attaching the

main board. (See fig.2)

(2) Remove the one screw E attaching the main board. (See

fig.3)

(3) Take out the main board, and then remove the wire from

speaker terminal. (See fig.4)

Reference:

When attach the screw D', spring and washer are attached
with screw D'. (See fig.2)

Caution:

When reassembly, wire should connect as same as before dis­assembly. (See fig.4)

3.3 Removing the speaker
(See fig.4)

• Remove the almi plate.

• Remove the main board.

(1) Remove the base cabinet.
(2) Remove the four screws F attaching the speaker.
(3) Shift up the speaker and take out.

washer

spring

D

D'

main board

D

D

Fig.2

spacer

base cabinet

base cabinet

F

E

Fig.3

wire (white)

upper cabinet

F

1-4 (No.MA252)

spacer

speaker

wire (blue)

Fig.4

F

This service manual does not describe ADJUSTMENT.

5.1 10 PIN CORD DIAGRAM

SECTION 4

ADJUSTMENT

SECTION 5

TROUBLESHOOTING

1.BL/WH

4.WH/BK

5.GY/BK

1 BL/WH

2 YL

7 YL

3 BK

8 BK

9 WH

4 WH/BK

2.YL

3.BK

6.NC

7.YL

8.BK

9.WH

10.GY

REMOTE

MEMORY

GND

FL+

FL-

POWER
LEAD

GROUND

BK

BL

WH

Black

Blue

White

TO L CHANNEL

SPEAKER OUTPUT

GY

YL

Gray

Yellow

TO ANPLEFIER
OR
RECEIVER

REMOTE OUT

OR

POWER LEAD

10 GY

5 GY/BK

RR

FR

FL

RL

Rear Right

Front Right

Front Left

Rear Left

FR+

FR-

REMOTE

GND

MEMORY

TO R CHANNEL

SPEAKER OUTPUT

Remote Out

Ground

Memory Backup Battery+

TO ANPLEFIER
OR
RECEIVER

(No.MA252)1-5

Victor Company of Japan, Limited
Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,Gumma-ken, 371-8543,Japan

(No.MA252)

Printed in Japan

VPT

PARTS LIST

CS-BB2J,CS-BB2U

* All printed circuit boards and its assemblies are not available as service parts.

MA252

- Contents -

Exploded view of general assembly and parts list (Block No.M1)
Electrical parts list (Block No.01)
Packing materials and accessories parts list (Block No.M3)

3-2
3-4
3-6

3-1