Sony SBV-55-A Service manual

SB-V55A

SERVICE MANUAL

Ver 1.0 2002. 01

SPECIFICATIONS

Input 4 Channels

S Video, V ideo, Audio (L/R) × 3

Video, Audio (L/R) × 1
Output S Video, V ideo, 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)

US Model

Design and specifications are subject to change without
notice.

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

AV SELECTOR

9-873-492-01

2002A0400-1
© 2002. 1

Sony Corporation

Personal Audio Company
Published by Sony Engineering Corporation

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

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.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY P ARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

2

SECTION 1

GENERAL

SB-V55A

This section is extracted
from instruction manual.

3

SB-V55A

8

d

SECTION 2

DISASSEMBLY

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

2-1. COVER, UPPER

6

cover,upper

5

1

P 3x8

2

P 3x

2-2. MAIN BOARD

4

BTP 2.6x10

2

3

1

BTP 2.6x5

BTP 2.6x10

3

MAIN boar

4

SECTION 3

DIAGRAMS

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

5 D7/CNTR1 I/O

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

16 P30/INT0 I/O Input/output port and interruption signal input
17 P31/INT1 I/O Input/output port and interruption signal input (Not used in this set.)

18 AIN0/CMP0– I

19 AIN1/CMP0+ I

20 AIN2/CMP1– I

21 AIN3/CMP1+ I

22 P00 I Input port (Signal input of SW1 in this set.)
23 P01 I Input port (Signal input of SW2 in this set.)
24 P02 I Input port (Signal input of SW3 in this set.)
25 P03 I Input port (Signal input of SW4 in this set.)
26 P10 I Input port (Signal input of SW5 in this set.)
27 P11 I Input port (SYNC.DET signal input in this set.)
28 P12 I/O Input/output port (Not used in this set.)
29 P13 O Output port (LED drive selection signal output to Q6 in this set.)
30 D0 O Output port (LED drive selection signal output to Q5 in this set.)
31 D1 O Output port (LED (D3) light signal output in this set.)
32 D2 O Output port (LED (D4) light signal output in this set.)

Clock signal input for event counter and two frequency division signal output of
under flow
Clock signal input for event counter and two frequency division signal output of
under flow

Voltage down detection signal input (“H”: operate, “L”: stop)
(Connect to ground in this set.)

A-D convert analog signal input and voltage comparator signal input
(Connect to ground in this set.)
A-D convert analog signal input and voltage comparator signal input
(Connect to ground in this set.)
A-D convert analog signal input and voltage comparator signal input
(Connect to ground in this set.)
A-D convert analog signal input and voltage comparator signal input
(Connect to ground in this set.)

SB-V55A

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SB-V55A

3-2. BLOCK DIAGRAM — MAIN SECTION —

J2(1/4)

INPUT 4

J6(1/4)

INPUT 1

J4(1/6)

INPUT 2

J4(2/6)

INPUT 3

J2(2/4)

INPUT 4

J6(2/4)

INPUT 1

J4(3/6)

INPUT 2

J4(4/6)

INPUT 3

J2(3/4)

INPUT 4 VIDEO

J6(3/4)

VIDEO

INPUT 1

J4(5/6)

VIDEO

INPUT 2

J4(6/6)

VIDEO

INPUT 3

J7

INPUT 1

J5(1/2)

INPUT 2

J5(2/2)

INPUT 3

• Signal path
: AUDIO
: VIDEO
: CHROMA

: Y

AUDIO

L

AUDIO

L

AUDIO

L

AUDIO

L

AUDIO

R

AUDIO

R

AUDIO

R

AUDIO

R

S

S

S

CC-15 BOARD

35

3
8

13

33

5
10
15

36

2

7
12

4

9
14

6
11
16

18

36

2

7
12

6
11
16

18

L1 IN
L2 IN
L3 IN
L4 IN

R1 IN
R2 IN
R3 IN
R4 IN

TUNER IN
V2 IN
V3 IN
V4 IN

C2 IN
C3 IN
C4 IN

Y2 IN
Y3 IN
Y4 IN

TUNERIN
V2 IN

V3 IN
V4 IN

Y2 IN
Y3 IN
Y4 IN

BIAS

BIAS

LCH SWITCH

RCH SWITCH

V SWITCH

C SWITCH

N

Y SWITCH

N

V SWITCH

Y SWITCH

VCC1
VCC2

DVDD

Y OUT

C OUT

INPUT

MANUAL

(RED)

10
11
14

X

15

13

5V REG

IC1

+4.9V

(B+)

4

X3

3.58MHz

+4.9V

(B+)

8

Q2

Q3

J1

DC IN 6V

!

+5V
(B+)

(B+)

Q6

4FSC CLOCK
GENERATOR

CLMIN

1

CMPIIN

16

FSCOUT

7

Y/C SEPARATION

CKIN

10

ADIN

4

SW1

SW2

SW3

SW4

SW5

+5V(B+)

D7

D6

D5

D4

D3

+5V(B+)

Q4

IC7

4FSCOUT

IC6

1

2

3

4

AUTO/MANUAL

4

3

2

1

MANUAL

Q5

L MODE

R

M

L

R MODE

L

M

R

CONTROL

6dB

S

0dB

6dB

6dB

CONTROL

V2 OUT

S

CONTROL

SIGNAL
SELECT

CONTROL

SWITCH

IC2

VCC

CHIP SELECT

SDA
SCL

L1 OUT

29

R1 OUT

27

SIGNAL
SELECT

SWITCH

IC4

V1 OUT

30

Y/C SEPA

31

1

VCC

C1 OUT

28

Y1 OUT

26

CIN

34

YIN

32

SDA

21

SCL

CHIP SELECT

24 10

+5V(B+)

1

22
21
20

20
22

X1

503.5kHz

+5V
(B+)

DISCRIMINATION

VIDEO

IN

OSC OUT

5

7

OSC IN2

SYNC

IC3

SYNC

DET

VCC

9

J2(4/4)

+5V(B+)

L

AUDIO

OUT

R

VIDEO

J3

S

Q1

LPF

D8

4MHz

+5V(B+)

X2

14

9

11

12

5
4

273

VDD

RESET

XOUT

XIN

D7/CNTR1
D6/CNTR2

P11

SYSTEM CONTROL

IC5

P30/INTO

P00

P01

P02

P03

P10

P13

22

23

24

25

26

3

D5

2

D4

1

D3

32

D2

31

D1

30

D0

29

D2

AUTO

(GREEN)

+4.9V

16

66