Sony FD-42A User manual

Table of contents

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SFRVICEMANUAL

oo

5~

3

3~—

usec

Canadian

Model

E

Model

SPECIFICATIONS

TV

standard

American

TV

standards

Dimensions

Approx.

127x216x66mm

(w/h/d)

incl.

TV

channel

coverage

projecting

parts

and

controls

VHF

channels

2-13

Weight

Approx.

1.2kg

(2

Ib

11

02)

incl.

UHF

channels

14-69

batteries

Antenna

VHF/UHF

telescopic

antenna

Approx.

0.93kg

(2

Ib

1

02)

not

incl.

Picture

tube

10-cm

(4-inch)

picture

measured

batteries

diagonally

Speaker

Approx.

5em

(2

inches)

dia.

FEATURES

Input

US,E

model:

EXT

ANT

(mini

jack),75

ohms

e

Miniature

B/W

TV

for

portable

or

desktop

use.

unbalanced

e

4-way

power

supply

capability.

Output

Earphone

jack

(minijack)

@External

antenna

jack

for

home

and

car

use.

(US,

E

model)

load

impedance

8—300

ohms

}

Battery

life

NOTE:

Use

only

an

AC

power

adaptor

or

car

battery

cord

manufactured

by

Sony.

The

polarity

of

the

plug

of

Battery

approx.

hours

other

manufactures

may

be

different.

Sony

SUM-2

(NS)

1.5

A)

-

Polarity

of

Sony

plug

Sony

AM-2

(N)

5

ow

Rechargeable

NC-C2

2

Power

comsumption

3.2W

(6V

DC)

Power

requirements

6V

DC:

Batteries

four

size

C

(R14P)

battery

DC

IN

6V

jack

accepts:

AC-D4L

AC

power

adaptor

for

use

on

120V

ac,

60Hz

vecwnertrce™

"FLAT

BLACK

AND

WHITE

TV

SONY.

B.W

MICROFILM

FD-42A

TABLE

OF

CONTENTS

Section

Title

Page

Specifications...

20.0

is

Age

wl

Bae

ee,

Apes

oes

Shae

ea

ales

Ba

i

Safety:

Check-Out:.uc

sro

wee

aie

Pate

ae

Oe

deta

we

pte

3

Precaution

for

A

Board

Replacement

..............--.-2-0.00--

4

Note

on

the

Anode

Cap

Removal.

...

2...

0...

000002

e

ee

eee

5

Parts-

Identification:

ig

ec

chuck

ea

Ae

Sepak

ae

Bae

Ve

a

at

5

SECTION

1.

ADJUSTMENTS....................-..-..2-.

6

SECTION

2.

DIAGRAMS

2-1.

Mounting

Diagram.

.............2---

0000-0

e

eee

10

2-2.

Schematic

Diagram

.....

2.0...

we

es

13

2-3.

VHF/UHF

Tuner

Unit

Schematic

Diagram.............

15

SECTION

3.

EXPLODED

VIEWS

AND

PARTS

LIST..........

17

SECTION

4.

ELECTRICAL

PARTS

LIST..................

21

|

FD-40A

disassemble

and

dial

string

procedures

|

are

available

for

this

set.

See

FD-40A

service

|

manual.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

SHADING

AND

MARK

A

ON

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

!N

SUPPLEMENTS

PUBLISHED

BY

SONY.

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

A

LA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

TRAME

ET

UNE

MARQUE

A

SUR

LES

DIAGRAMMES

SCHE-

MATIQUES

ET

LA

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

DE

FONCTIONNEMENT.

NE

REM-

PLACER

CES

COMPOSANTS

QUE

PAR

DES

PIECES

SONY

DONT

LES

NUMEROS

SONT

DONNES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

FD-42A

SAFETY

CHECK-OUT

After

correcting

the

original

service

problem,

perform

the

following

safety

checks

before

releasing

the

set

to

the

customer:

1.

Check

the

area

of

your

repair

for

unsoldered

or

Check

the

entire

board

surface

for

soider

spiashes

and

bridges.

poorly-soldered

connections.

2.

Check

the

interboard

wiring

to

ensure

that

no

wires

are

‘‘pinched”

or

contact

high-wattage

resistors.

3.

Check

that

all

control

knobs,

shields,

covers,

ground

straps,

and

mounting

hardware

have

been

replaced.

Be

absolutely

certain

that

you

have

replaced

all

the

insulators.

Look

for

unauthorized

replacement

parts,

par-

ticularly

transistors,

that

were

installed

during

a

previous

repair.

Point

them

out

to

the

customer

and

recommend

their

replacement.

5.

Look

for

parts

which,

though

functioning,

show

obvious

signs

of

deterioration.

Point

them

out

to

the

customer

and

recommend

their

replace-

ment.

6.

Check

the

line

cord

for

cracks

and

abrasion.

Recommend

the

replacement

of

any

such

line

cord

to

the

customer.

7.

Check

the

condition

of

the

monopole

antenna

(if

any).

Make

sure

the

end

is

not

broken

off,

and

has

the

plastic

cap

on

it.

Point

out

the

danger

of

impalement

on

a

_

broken

antenna

to

the

customer,

and

recommend

the

_

antenna’s

replacement.

8.

Check

the

B+

and

HV

to

see

they

are

at

the

values

specified.

Make

sure

your

instruments

are

accurate;

be

suspicious

of

your

HV

meter

if

sets

always

have

low

HV.

9.

Check

the

antenna

terminals,

metal

trim,

“metallized”

knobs,

screws,

and

all

other

exposed

metal

parts

for

AC

leakage.

Check

leakage

as

described

below.

To

Exposed

Metal

Parts

on

Set

|

se

eed

AC

0.75

pF

15K

vo/tmeter

{0.75

V)

=

Earth

Ground

[Fig

A.

Using

an

AC

voltmeter

to

check

AC

leakage.

—3—

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

0.5SmA

(S00

microampers).

Leakage

current

can

be

measured

by

any

one

of

three

methods.

1.

A

commercial

leakage

tester,

such

as

the

Simpson

229

or

RCA

WT-540A.

Follow

the

manufacturers’

instructions

to

use

these

instru-

ments.

2.

A

battery-operated

AC

milliammeter.

The

Data

Precision

245

digital

multimeter

is

suitable

for

this

job.

Measuring

the

voltage

drop

across

a

resistor

by

means

of

a

VOM

or

battery-operated

AC

volt-

meter.

The

“limit”

indication

is

0.75V,

so

analog

meters

must

have

an

accurate

low-

voltage

scale.

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

of

a

passive

VOM

that

is

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

a

2V AC

range

are

suitable.

(See

Fig.

A)

HOW

TO

FIND

A

GOOD

EARTH

GROUND

A

cold-water

pipe

is

guaranteed

earth

ground;

the

cover-plate

retaining

screw

on

most

AC

outlet

boxes

is

also

at

earth

ground.

If

the

retaining

screw

is

to

be

used

as

your

earth-ground,

verify

that

it

is

at

ground

by

measuring

the

resistance

between

it

and

a

cold-

water

pipe

with

an

ohmmeter.

The

reading

should

be

zero

Ohms.

If

a

cold-water

pipe

is

not

accessible,

connect

a

60-100

watts

trouble

light

(not

a

reon

lamp)

between

the

hot

side

of

the

receptacle

and

the

retaining

screw.

Try

both

slots,

if

necessary,

to

locate

the

hot

side

of

the

line,

the

lamp

should

light

at

normal

brilliance

if

the

screw

is

at

ground

potential.

(See

Fig.

B)

Trouble

Light

a

Ohmmeter

-

AC

Outlet

Box

Cold-water

Five

Fig.

B.

Checking

for

earth

ground.

FD-42A

PRECAUTION

FOR

A

BOARD

REPLACEMENT

(Only

for

Canadian

Model)

Perform

this

parts

replacement

only

for

|

Canadian

model.

|

EXT

ANT

(external

antenna)

jack

J101

is

mounted

on

A

board

for

repair,

but

J101

should

not

be

used

in

2

Canadian

model.

In

case

of

Canadian

model,

perform

the

following

procedure.

Install

jamper.

FD-42A

be

ee

NOTE

ON

THE

ANODE

CAP

REMOVAL

Even

when

the

power

switch

is

off,

the

voltage

at

2.

Pinch

and

remove

the

anode

pin

with

a

pair

of

the

anode

cap

is

still

high.

tweezers.

Remove

the

anode

cap

as

follows.

At

this

time,

be

careful

not

to

scratch

the

anode

1.

Discharge

the

anode

pin

to

the

ground.

button.

anode

pin

anode

cap

\

anode

button

Caution

on

Reinstallation

:

Confirm

that

the

anode

button

is

inserted

into

the

anode

cap

securely.

tl

shalt

ttyl

lt

clit

al

hcl

th

ltl

tl

ltl

lt

latch

lll

cl

hl

Atel

ltl

Hl

al

At

Atl

cA

al

cl

al

PARTS

IDENTIFICATION

Speaker

:

BAND

SELECT

switch

Telescopic

antenna

US,

E

model:

POWER

switch

EXT

ANT

(external

antenna)

_______-»-}

[

jack

(left

side)

CONTR

(contrast)

control

eee

4

(left

side)

VOL

(volume)

control

Tuning

knob

BRT

(brightness)

control

~

(left

side)

Dial

scale

DC

IN

6V

(external

power

input)

jack

‘ae

Battery

compartment

(rear)

Screen

EARPHONE

jack

CONTR

(contrast)

control

BRT

(brightness)

control

The

picture

contrast

becomes

stronger

by

turning

gy

Turn

the

control

counterclockwise

for

more

bright-

the

contro!

counterclockwise,

and

is

reduced

by

|

ness

and

clockwise

for

less

brightness.

turning

it

clockwise.

FD-42A

SECTION

1

ADJUSTMENTS

HOLD

DOWN

CIRCUIT

CHECK

1.

Connect

regurated

dc

power

supply

to

DC

IN

6V

jack

(J601).

.

Confirm

that

the

set

operates

when

applying

7420.1V.

.

Confirm

that

the

set

does

not

operate

when

ap-

plying

8.7

+

0.1V.

Disconnect

requrated

dc

power

supply.

Connect

requrated

dc

power

supply

as

illustrat-

ed.

Confirm

that

the

set

operates

when

applying

6.0+0.1V.

.

Confirm

that

the

set

does

not

operate

when

F

+

OV

applying

7.2

_

0.1V.

requrated

dc

power

supply

NOTE

1.

Test

Equipment

Required

®

regulated

dc

power

supply

®

color-bar/pattern

generator

®@

frequency

counter

®

digital

voltmeter

@VOM

.

Input

Signal

Cross

hatch

color-bar

or

off-the-air

signal.

3.

The

adjustment

should

be

performed

with

6V

dc

and

about

5

minutes

warmup

unless

otherwise

noted.

4.

Position

the

set

vertically

with

the

front

side

faced

to

the

north

for

TV-section

adjustments.

to

Horizontal

Adjustment

.

Loosen

the

adjustment

screw.

.

Tune

in

a

test

or

off-the-air

signal

and

adjust

de-

flection

yoke

for

optimum

horizontal

picture.

.

Tighten

the

screw

after

the

adjustment.

Centering

Adjustment

.

Tune

in

a

test

or

off-the-air

signal.

.

Adjust

the

two

centering

magnets

so

that

the

picture

is

at

the

center.

.

Lock

the

magnets

with

locking

compound

after

the

adjustment.

Horizontal

Amplitude

(H-SIZE)

Adjustment

1.

Tune

in

an

off-the-air

signal.

2.

Adjust

RV852

for

the

best

horizontal

ampli-

RV852

Vertical

Amplitude

(V-SIZE)

Adjustment

1.

Tune

in

an

off-the-air

signal.

2.

Adjust

RV851

for

the

best

vertical

ampli-

RvV851

Keystone

Correction

(KEYST)

Adjustment

FD-42A

4.7V

Adjustment

1.

Connect

digital

voltmeter

to

Q601

collector.

2.

Adjust

RV601

for

4.7V

reading

on

digital

voltmeter.

digital

voltmeter

iat

=a

Q601

collector

RV601

—

D

BOARD

—

RV502

1.

Tune

in

an

off-the-air

signal.

2.

Adjust

RV502

for

the

optimum

picture.

x

Oo

x

RV853

|

_

as

#

Rv4o1

|

~

Horizontal

Frequency

(H-F

REQ)

Adjustment

1.

Short-circuit

between

ICSO1

pin

a3)

and

ground

with

jumper

wire.

2.

Connect

the

frequency

counter

to

ICSO1

pin

6).

RV501

3.

Adjust

RV501

for

a

15,734

kHz

reading

on

fre-

quency

counter.

4.

After

the

adjustment,

remove

the

jumper

wire

in

step

1.

frequency

counter

ae

RV802

Focus

Adjustment

.

Set

the

regulated

dc

power

supply

voltage

to

4.8V.

.

Tune

in

an

off-the-air

signal.

.

Adjust

RV802

for

the

best

focus

at

the

center

of

the

picture.

FD-42A

Luminance

(BRT)

Adjustment

1.

Bridge

the

pattern

according

to

the

mark

on

the

neck

of

the

picture

tube.

mark

pattern

connection

(R871)

2.

Turn

BRT

knob

(RV853)

fully

counterclock-

wise

and

then

turn

CONTR

knob

(RV401)

fully

clockwise.

3.

Connect

the

digital

voltmeter

across

R860.

4.

Adjust

the

RV802

for

9.0V

dc

reading

on

the

digital

voltmeter.

If

not,

disconnect

pattern

connection

@

and

connect

®

and

adjust

again.

digital

voltmeter

%

ia

PUSH

ON

é

Luminance

(BRT)

Adjustment

ector.

1

ligital

.

Bridge

the

pattern

according

to

the

mark

on

the

neck

of

the

picture

tube.

LJ

5

mark

pattern

connection

(R871)

2.

Turn

BRT

knob

(RV853)

fully

counterclock-

wise

and

then

turn

CONTR

knob

(RV401)

fully

clockwise.

3.

Connect

the

digital

voltmeter

across

R860.

4.

Adjust

the

RV802

for

9.0V

dc

reading

on

the

digital

voltmeter.

If

not,

disconnect

pattern

connection

@)

and

connect

@®

and

adjust

again.

digital

voltmeter

@

“

a

ih

Front

eras)

®

Nr

oO

T

Channel

Display

Adjustment

.

Set

the

BAND

SELECT

switch

to

VHE.

.

Turn

the

TUNING

knob

fully

clockwise.

.

Turn

the

TUNING

knob,

set

the

dial

pointer

to

the

letter

“2”

on

dial

scale.

Adjust

RV151

for

the

optimum

picture.

In

the

area

where

an

off-the-air

signal

can

not

be

tuned

in,

adjust

RV151

for

2.2V

reading

on

VOM.

...

(V.L.

START)

.

Turn

the

TUNING

knob,

set

the

dial

pointer

~

to

the

letter

“6”

on

dial

scale.

Adjust

RV152

for

the

optimum

picture.

In

the

area

where

an

off-the-air

signal

can

not

be

tuned

in,

adjust

RV152

for

18V

reading

on

VOM.

...

(V.L.

END)

.

Turn

the

TUNING

knob,

set

the

dial

pointer

to

the

letter

‘‘7”’

on

dial

scale.

Adjust

RV153

for

the

optimum

picture.

In

the

area

where

an

off-the-air

signal

can

not

be

tuned

in,

adjust

RV153

for

8.4V

reading

on

VOM.

...

(V.H.

START)

.

Turn

the

TUNING

knob,

set

the

dial

pointer

to

the

letter

‘13’

on

dial

scale.

Adjust

RV154

for

the

optimum

picture.

In

the

area

where

an

off-the-air

signal

can

not

be

tuned

in,

adjust

RV154

for

20V

reading

on

VOM.

...

(V.H.

END)

.

When

tuning

in

all

the

off-the-air

signals

(VHF

CH2-13)

capable

of

receiving,

make

sure

that

the

dial

pointer

is

correctly

set

to

the

dial

scale.

—

A

BOARD

—

L202

L203

VIF

and

AFT

Adjustments

1.

Tune

in

an

off-the-air

signal.

2.

Adjust

L202

(VIF)

and

L203

(AFT)

for

the

best

picutre.

8.

Set

the

BAND

SELECT

switch

to

UHF.

9.

Turn

the

TUNING

knob,

set

the

dial

pointer

to

the

letter

‘‘69”

on

dial

scale.

Adjust

RV155

for

the

optimum

picture.

In

the

area

where

an

off-the-air

signal

can

not

be

tuned

in,

adjust

RV155

for

22V

reading

on

VOM.

...

(U.LEND)

.

When

tuning

in

all

the

off-the-air

signals

(UHF)

capable

of

receiving,

make

sure

that

the

pointer

is

correctly

set

to

the

dial

scale.

ead

|

-

-

RV2071

RF

AGC

Adjustment

1.

Tune

in

an

off-the-air

signal.

2,

Adjust

RV201

so

that

snow

noise

disappears

from

the

picture.

FD-42A

FD-42A

FD-42

SECTION

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15

for

Semiconductor

Lead

Layouts.

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capacitors

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otherwise

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Power

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de

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;

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DC

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6V

jack.

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are

dc

with

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ay

under

no-signal

conditions.

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Voltage

variations

may

be

noted

due

to

normal

produc-

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tolerances.

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e

©:

waveform

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ber

signal

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mode

by

using

osilloscope.

hoa

Voltage

variations

may

be

noted

due

to

normai

produc-

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tion

tolerances.

as

pass

2

| |

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Switch

i

|

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Switch

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fon

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;

8°

4.8Vp-p

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Ref.

No.

|

Location

|

Ref.

No.

|

Location

T

D151

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Q151

G-6

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D152

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H-8

Q201

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G-6

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B-12

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E-14

Q302

B-12

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1

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D503

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B-14

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a

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D601

E-16

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C-14

D602

E-17

Q551

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D651

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D-17

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D-12

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H-17

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D803

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D804

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Q652

D-17

D805

1-13

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D806

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D807

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D852

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Q806

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1C201

1-3

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By

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FD-42A

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BATT

CASE

SECTION

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BATTERY

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2x4

,

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+

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(IEC

DESIGNATION

R14)

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PCS

6V

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}

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SELECT

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