Sony Sb-v55a User manual

Ver 1.0 2002. 01

SERVICE MANUAL

US Model

SB-V55A

AV SELECTOR

SPECIFICATIONS

Input 4 Channels

S Video, Video, Audio (L/R) ×3

Video, Audio (L/R) ×1

Output S Video, Video, Audio (L/R) ×1

Dimensions Approx. 7 1/4 ×2 1/4 ×5 5/8 inches

(184 ×54 ×142 mm) (w/h/d)

Mass Approx. 13 oz. (360 g)

Power AC power adaptor

120 V AC

6 V DC

Optional accessories AC power adaptor (1)

Design and specifications are subject to change without

notice.

The “CE” printed on the unit is available only for the EU

member nations.

Sony Corporation

Personal Audio Company

Published by Sony Engineering Corporation

9-873-492-01

2002A0400-1

SB-V55A

TABLE OF CONTENTS

1. GENERAL

Locating the parts and controls ............................................... 3

Connections ............................................................................. 3

Connecting the power source .................................................. 3

2. DISASSEMBLY

2-1. Cover, Upper ....................................................................... 4

2-2. Main Board ......................................................................... 4

3. DIAGRAMS

3-1. IC Pin Description............................................................... 5

3-2. Block Diagram –Main Section–.......................................... 6

3-3. Printed Wiring Board –Main Section– ................................ 8

3-4. Schematic Diagram –Main Section–.................................10

4. EXPLODED VIEWS

4-1. Main Section ..................................................................... 13

5. ELECTRICAL PARTS LIST ........................................ 14

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE

WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.

REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE

PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR

IN SUPPLEMENTS PUBLISHED BY SONY.

Notes on Chip Component Replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

SB-V55A

SECTION 1

GENERAL This section is extracted

from instruction manual.

SB-V55A SECTION 2

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

2-1. COVER, UPPER

2-2. MAIN BOARD

P 3x

BTP 2.6x10

cover,upper

P 3x8

BTP 2.6x5

MAIN boar

SB-V55A

3-1. IC PIN DESCRIPTION

• IC5 M34513 (SYSTEM CONTROL)

Pin No. Pin Name I/O Pin Description

1 D3 O Output port (LED (D5) light signal output in this set.)

2 D4 O Output port (LED (D6) light signal output in this set.)

3 D5 O Output port (LED (D7) light signal output in this set.)

4 D6/CNTR0 I/O Clock signal input for event counter and two frequency division signal output of

under flow

5 D7/CNTR1 I/O Clock signal input for event counter and two frequency division signal output of

under flow

6 P20/SCK I/O Serial clock signal input/output (Connect to ground in this set.)

7 P21/SOUT O Serial data signal output (Connect to ground in this set.)

8 P22/SIN I Serial data signal input (Connect to ground in this set.)

9 RESET I Reset signal input

10 CNVSS — Ground pin

11 XOUT O System clock signal output (4 MHz)

12 XIN I System clock signal input (4 MHz)

13 VSS — Ground pin

14 VDD — Power supply pin

15 VDCE I Voltage down detection signal input (“H”: operate, “L”: stop)