Sony SAT-B2/2 User manual

SERVICE

MANUAL

~—

GAT-B2/2

ueviag

U.S.

Models

Maiti,

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sear

ei

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SAT-B2/2

DIGITAL

SATELLITE

RECEIVER

MICROFILM]

_pIgiTAL

SATELLITE

SYSTEM

®

SAT-B2/2

Specifications

Input

Jacks

UHF/VHF

75

ohm

external

terminal

Satellite

Antenna

75

ohm

external

terminal

CONTROL-S

IN/S-LINK

(mini-jack)

5Vp-p

AC

Power

(120V

60

Hz)

Output

Jacks

S-VIDEO

OUT

4-pin

mini

DIN

VIDEO

(phono

jacks)

(2)

AUDIO

R/L

(phono

jacks)

(2)

VHF

(SAT)/UHF

Wide

Band

Data

15-pin

D-Sub

Female

TEL

LINE

VCR

MOUSE/CONTROL-S

OUT

(mini-jack)

Input

Frequency

950

-

1450

Mhz

Power

Requirements

120V

AC,

60

Hz

Power

Consumption

20

W

max.

Dimensions

16.9

x

3.2

x

10.8

inches

(w/h/d)

430

x

85

x

290

mm

Weight

Set:

10.8

lb

(4.9

kg)

Unit:

6.4

Ib

(2.9

kg)

Supplied

Remote

Commander,

RM-Y129

Accessories

Size

AA

Batteries

(2)

Access

Card

(1)

Audio/Video

Cable

(1)

RF

Cable

(1)

Telephone

Cable

(1)

AC

Power

Cord

VCR

Mouse,

RM-VM101

Design

and

specifications

subject

to

change

without

notice.

Optional

Sony-brand

DSS

Accessories

Installation

Kit

Voltage

Switch

Universal

Remote

Commander

_—

Coaxial

Cable

(75

ft.)

ANJ-DSI

ECA-DV1

RM-Y130

SAK-C75

In-line

Amplifier

Multi-Room

A/V

Distribution

Syskm

Flat

Cable

Dish

Antennas

EAC-DA1

MDR-Di

SAK-F1

SAT-18S1

Diplexer

IR

Target

(for

MRD-D1

System)

Coaxial

Cable

(25

ft.)

SAT-18D1

EAC-DD1

EAC-T1

SAK-C25

_

SAT-B2/2

Specifications

SAFETY

CHECK-OUT

1.

Check

the

area

of

your

repair

for

unsoldered

or

poorly-sol-

dered

connections.

Check

the

entire

board

surface

for

sol-

der

splashes

and

bridges.

2.

Check

the

interboard

wiring

to

ensure

that

no

wires

are

“pinched”

or

contact

high-wattage

resistors.

3.

Check

that

all

contro!

knobs,

shields,

covers,

ground

straps,

and

mounting

hardware

have

been

replaced.

Be

absolutely

certain

that

you

have

replaced

all

the

insulators.

4.

Look

for

unauthorized

replacement

parts,

particularly

tran-

sistors,

that

were

installed

during

a

Point

them

out

to

the

customer

and

recommend

their

replacement.

LEAKAGE

TEST

The

AC

leakage

from

any

exposed

metal

part

to

earth

ground

and

from

all

exposed

metal

parts

to

any

exposed

metal

part

having

a

return

to

chassis,

must

not

exceed

0.5

mA

(500

mi-

croamperes).

Leakage

current

can

be

measured

by

any

one

of

three

methods.

1.

Acommercial

leakage

tester,

such

as

the

Simpson

229

or

RCA

WT-540A.

Follow

the

manufacturers’

instructions

to

use

these

instruments.

2.

Abattery-operated

AC

milliammeter.

The

Data

Precision

245

digital

multimeter

is

suitable

for

this

job.

3.

Measuring

the

voltage

drop

across

a

resistor

by

means

of

a

VOM

or

battery-operated

AC

voltmeter.

The

“limit”

in-

dication

is

0.75

V,

so

analog

meters

must

have

an

accu-

rate

low-voltage

scale.

The

Simpson

250

and

Sanwa

SH-

63Trd

are

examples

of

passive

VOMs

that

are

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

a2

VAC

range

are

suitable.

(See

Figure

1)

5.

Look

for

parts

which,

though

functioning,

show

obvious

signs

of

deterioration.

Point

them

out

to

the

customer

and

recommend

their

replacement.

6..Check

the

line

cords

for

cracks

and

abrasion.

Recommend

the

replacement

of

any

such

line

cord

to

the

customer.

7.

Check

the

B+

and

HV

to

see

if

they

are

specified

values.

Make

sure

your

instruments

are

accurate;

be

suspicious

of

your

HV

meter

if

sets

always

have

low

HV.

8.

Check

the

antenna

terminals,

metal

trim,

“metallized”

knobs,

screws,

and

all

other

exposed

metal

parts

for

AC

leakage

using

one

of

the

methods

listed.

To

Exposed

Metal

Parts

on

Set

AC

Voltmeter

TC

(0.75

V)

—

Earth

Ground

Figure

1.

Using

an

AC

voltmeter

to

check

AC

leakage.

SAT-B2/2

SECTION

1.

TABLE

OF

CONTENTS

TITLE

PAGE

Genoral..

s.¢.5

u8Ues

Deedee

Be

tS

he

ees

5

Disassembly

2-1.

UpperCaseRemoval

...........2.2..0000

10

2-2.

HAandHB

BoardsRemoval

...............

10

2-3.

A,

G,SC

Board,

DSS

Front

End

Module

Removal.

....

.

10

Diagrams

3-1.

Block

Diagrams.

...

2...

0...

ee

eee

11

3-2.

Circuit

BoardsLocation

............02.22804

14

3-3.

Schematic

Diagrams

and

Printed

Wiring

Boards.

......

14

(1)

Schematic

Diagrams

of

HA

andHB

Boards.

.....

16

(2)

Schematic

Diagrams

of

G,

SC

and

A

(1/4)

Boards

. . .

17

(3)

Schematic

Diagram

of

A

Board

(2/4)

.........

20

(4)

Schematic

Diagram

of

A

Board

(3/4)

.........

23

(5)

Schematic

Diagram

of

A

Board

(4/4)...

.....2..

26

(6)

A

Board

PCB

and

Components

Location.

......

29

3-4.

Semiconductors...

......

0.00.00

eee

eae

32

Exploded

Views

41;

“SAT-B2/2).

3)

&

easel

ee ob

ee

eo

oe

aed

as

ele

ce

te

33

Electrical

Parts

List.................00

000s

34

SAFETY-RELATED

COMPONENT

WARNING!!

/

Components

identified

by

shading

and

mark

/

|

on

the

schematic

diagrams,

exploded

views

and

|

_

in

the

parts

list

are

critical

for

safe

operation.

|

Replace

these

components

with

Sony

parts

|

whose

part

numbers

appear

as

shown

in

this

|

manual

or

in

supplements

published

by

Sony.

|

Circuit

adjustments

that

are

critical

for

safe

op-

|

eration

are

identified

in

this

manual.

Follow

these

|

procedures

whenever

critical

components

are

|

replaced

or

improper

operation

is

suspected.

|

SAT-B2/2

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SECTION

2

DISASSEMBLY

2-1.

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Sony SAT-B2/2 User manual

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