Sony FD-42A Manual de usuario

SFRVICEMANUAL

3~—

usec

Canadian

Model

SPECIFICATIONS

standard

American

standards

Dimensions

Approx.

127x216x66mm

(w/h/d)

incl.

channel

coverage

projecting

parts

and

controls

VHF

channels

2-13

Weight

Approx.

1.2kg

02)

incl.

UHF

channels

14-69

batteries

Antenna

VHF/UHF

telescopic

antenna

Approx.

0.93kg

02)

not

incl.

Picture

tube

10-cm

(4-inch)

picture

measured

batteries

diagonally

Speaker

Approx.

5em

inches)

dia.

FEATURES

Input

US,E

model:

EXT

ANT

(mini

jack),75

ohms

Miniature

B/W

for

portable

desktop

use.

unbalanced

4-way

power

supply

capability.

Output

Earphone

jack

(minijack)

@External

antenna

jack

for

home

and

car

use.

(US,

model)

load

impedance

8—300

ohms

}

Battery

life

NOTE:

Use

only

power

adaptor

car

battery

cord

manufactured

Sony.

The

polarity

the

plug

Battery

approx.

hours

other

manufactures

may

different.

Sony

SUM-2

(NS)

1.5

Polarity

Sony

plug

Sony

AM-2

(N)

Rechargeable

NC-C2

Power

comsumption

3.2W

(6V

DC)

Power

requirements

DC:

Batteries

four

size

(R14P)

battery

jack

accepts:

AC-D4L

power

adaptor

for

use

120V

ac,

60Hz

vecwnertrce™

"FLAT

BLACK

AND

WHITE

SONY.

B.W

MICROFILM

FD-42A

TABLE

CONTENTS

Section

Title

Page

Specifications...

20.0

Age

Bae

ee,

Apes

oes

Shae

ales

Safety:

Check-Out:.uc

sro

wee

aie

Pate

deta

pte

Precaution

for

Board

Replacement

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

Note

the

Anode

Cap

Removal.

...

2...

0...

000002

eee

Parts-

Identification:

chuck

Sepak

Bae

SECTION

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

SECTION

DIAGRAMS

2-1.

Mounting

Diagram.

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

0000-0

eee

2-2.

Schematic

Diagram

.....

2.0...

2-3.

VHF/UHF

Tuner

Unit

Schematic

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

SECTION

EXPLODED

VIEWS

AND

PARTS

LIST..........

SECTION

ELECTRICAL

PARTS

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

FD-40A

disassemble

and

dial

string

procedures

are

available

for

this

set.

See

FD-40A

service

manual.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

SHADING

AND

MARK

THE

SCHEMATIC

DIAGRAMS

AND

THE

PARTS

LIST

ARE

CRITICAL

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

SHOWN

THIS

MANUAL

SUPPLEMENTS

PUBLISHED

SONY.

ATTENTION

COMPOSANT

AYANT

RAPPORT

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

TRAME

UNE

MARQUE

SUR

LES

DIAGRAMMES

SCHE-

MATIQUES

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

SECURITE

FONCTIONNEMENT.

REM-

PLACER

CES

COMPOSANTS

QUE

PAR

DES

PIECES

SONY

DONT

LES

NUMEROS

SONT

DONNES

DANS

MANUEL

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

the

customer:

Check

the

area

your

repair

for

unsoldered

Check

the

entire

board

surface

for

soider

spiashes

and

bridges.

poorly-soldered

connections.

Check

the

interboard

wiring

ensure

that

wires

are

‘‘pinched”

contact

high-wattage

resistors.

Check

that

all

control

knobs,

shields,

covers,

ground

straps,

and

mounting

hardware

have

been

replaced.

absolutely

certain

that

you

have

replaced

all

the

insulators.

Look

for

unauthorized

replacement

parts,

par-

ticularly

transistors,

that

were

installed

during

repair.

Point

them

out

the

customer

and

recommend

their

replacement.

Look

for

parts

which,

though

functioning,

show

obvious

signs

deterioration.

Point

them

out

the

customer

and

recommend

their

replace-

ment.

Check

the

line

cord

for

cracks

and

abrasion.

Recommend

the

replacement

any

such

line

cord

the

customer.

Check

the

condition

the

monopole

antenna

(if

any).

Make

sure

the

end

not

broken

off,

and

has

the

plastic

cap

it.

Point

out

the

danger

impalement

broken

antenna

the

customer,

and

recommend

the

antenna’s

replacement.

Check

the

B+

and

see

they

are

the

values

specified.

Make

sure

your

instruments

are

accurate;

suspicious

your

meter

sets

always

have

low

HV.

Check

the

antenna

terminals,

metal

trim,

“metallized”

knobs,

screws,

and

all

other

exposed

metal

parts

for

leakage.

Check

leakage

described

below.

Exposed

Metal

Parts

Set

eed

0.75

15K

vo/tmeter

{0.75

Earth

Ground

[Fig

Using

voltmeter

check

leakage.

—3—

LEAKAGE

TEST

The

leakage

from

any

exposed

metal

part

earth

ground

and

from

all

exposed

metal

parts

any

exposed

metal

part

having

return

chassis,

must

not

exceed

0.5SmA

(S00

microampers).

Leakage

current

can

measured

any

one

three

methods.

commercial

leakage

tester,

such

the

Simpson

229

RCA

WT-540A.

the

manufacturers’

instructions

use

these

instru-

ments.

battery-operated

milliammeter.

The

Data

Precision

245

digital

multimeter

suitable

for

this

job.

Measuring

the

voltage

drop

across

resistor

means

VOM

battery-operated

volt-

meter.

The

“limit”

indication

0.75V,

analog

meters

must

have

accurate

low-

voltage

scale.

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

passive

VOM

that

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

2V AC

range

are

suitable.

(See

Fig.

HOW

FIND

GOOD

EARTH

GROUND

cold-water

pipe

guaranteed

earth

ground;

the

cover-plate

retaining

screw

most

outlet

boxes

also

earth

ground.

the

retaining

screw

used

your

earth-ground,

verify

that

ground

measuring

the

resistance

between

and

cold-

water

pipe

with

ohmmeter.

The

reading

should

zero

Ohms.

cold-water

pipe

not

accessible,

connect

60-100

watts

trouble

light

(not

reon

lamp)

between

the

hot

side

the

receptacle

and

the

retaining

screw.

Try

both

slots,

necessary,

locate

the

hot

side

the

line,

the

lamp

should

light

normal

brilliance

the

screw

ground

potential.

(See

Fig.

Trouble

Light

Ohmmeter

Outlet

Box

Cold-water

Five

Fig.

Checking

for

earth

ground.

FD-42A

PRECAUTION

FOR

BOARD

REPLACEMENT

(Only

for

Canadian

Model)

Perform

this

parts

replacement

only

for

Canadian

model.

EXT

ANT

(external

antenna)

jack

J101

mounted

board

for

repair,

but

J101

should

not

used

Canadian

model.

case

Canadian

model,

perform

the

following

procedure.

Install

jamper.

FD-42A

NOTE

THE

ANODE

CAP

REMOVAL

Even

when

the

power

switch

off,

the

voltage

Pinch

and

remove

the

anode

with

pair

the

anode

cap

still

high.

tweezers.

Remove

the

anode

cap

follows.

this

time,

careful

not

scratch

the

anode

Discharge

the

anode

the

ground.

button.

anode

cap

anode

button

Caution

Reinstallation

Confirm

that

the

anode

button

inserted

into

the

anode

cap

securely.

shalt

ttyl

clit

hcl

ltl

latch

lll

Atel

ltl

Atl

PARTS

IDENTIFICATION

Speaker

BAND

SELECT

switch

Telescopic

antenna

US,

model:

POWER

switch

EXT

ANT

(external

antenna)

_______-»-}

[

jack

(left

side)

CONTR

(contrast)

control

eee

(left

side)

VOL

(volume)

control

Tuning

knob

BRT

(brightness)

control

(left

side)

Dial

scale

(external

power

input)

jack

‘ae

Battery

compartment

(rear)

Screen

EARPHONE

jack

CONTR

(contrast)

control

BRT

(brightness)

control

The

picture

contrast

becomes

stronger

turning

Turn

the

control

counterclockwise

for

bright-

the

contro!

counterclockwise,

and

reduced

ness

and

clockwise

for

less

brightness.

turning

clockwise.

FD-42A

SECTION

ADJUSTMENTS

HOLD

DOWN

CIRCUIT

CHECK

Connect

regurated

power

supply

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

power

supply.

Connect

requrated

power

supply

illustrat-

ed.

Confirm

that

the

set

operates

when

applying

6.0+0.1V.

Confirm

that

the

set

does

not

operate

when

applying

7.2

0.1V.

requrated

power

supply

NOTE

Test

Equipment

Required

regulated

power

supply

color-bar/pattern

generator

®@

frequency

counter

digital

voltmeter

@VOM

Input

Signal

Cross

hatch

color-bar

off-the-air

signal.

The

adjustment

should

performed

with

and

about

minutes

warmup

unless

otherwise

noted.

Position

the

set

vertically

with

the

front

side

faced

the

north

for

TV-section

adjustments.

Horizontal

Adjustment

Loosen

the

adjustment

screw.

Tune

test

off-the-air

signal

and

adjust

de-

flection

yoke

for

optimum

horizontal

picture.

Tighten

the

screw

after

the

adjustment.

Centering

Adjustment

Tune

test

off-the-air

signal.

Adjust

the

two

centering

magnets

that

the

picture

the

center.

Lock

the

magnets

with

locking

compound

after

the

adjustment.

Horizontal

Amplitude

(H-SIZE)

Adjustment

Tune

off-the-air

signal.

Adjust

RV852

for

the

best

horizontal

ampli-

RV852

Vertical

Amplitude

(V-SIZE)

Adjustment

Tune

off-the-air

signal.

Adjust

RV851

for

the

best

vertical

ampli-

RvV851

Keystone

Correction

(KEYST)

Adjustment

FD-42A

4.7V

Adjustment

Connect

digital

voltmeter

Q601

collector.

Adjust

RV601

for

4.7V

reading

digital

voltmeter.

digital

voltmeter

iat

Q601

collector

RV601

—

BOARD

—

RV502

Tune

off-the-air

signal.

Adjust

RV502

for

the

optimum

picture.

RV853

Rv4o1

Horizontal

Frequency

(H-F

REQ)

Adjustment

Short-circuit

between

ICSO1

a3)

and

ground

with

jumper

wire.

Connect

the

frequency

counter

ICSO1

6).

RV501

Adjust

RV501

for

15,734

kHz

reading

fre-

quency

counter.

After

the

adjustment,

remove

the

jumper

wire

step

frequency

counter

RV802

Focus

Adjustment

Set

the

regulated

power

supply

voltage

4.8V.

Tune

off-the-air

signal.

Adjust

RV802

for

the

best

focus

the

center

the

picture.

FD-42A

Luminance

(BRT)

Adjustment

Bridge

the

pattern

according

the

mark

the

neck

the

picture

tube.

mark

pattern

connection

(R871)

Turn

BRT

knob

(RV853)

fully

counterclock-

wise

and

then

turn

CONTR

knob

(RV401)

fully

clockwise.

Connect

the

digital

voltmeter

across

R860.

Adjust

the

RV802

for

9.0V

reading

the

digital

voltmeter.

not,

disconnect

pattern

connection

and

connect

and

adjust

again.

digital

voltmeter

PUSH

Luminance

(BRT)

Adjustment

ector.

ligital

Bridge

the

pattern

according

the

mark

the

neck

the

picture

tube.

mark

pattern

connection

(R871)

Turn

BRT

knob

(RV853)

fully

counterclock-

wise

and

then

turn

CONTR

knob

(RV401)

fully

clockwise.

Connect

the

digital

voltmeter

across

R860.

Adjust

the

RV802

for

9.0V

reading

the

digital

voltmeter.

not,

disconnect

pattern

connection

and

connect

@®

and

adjust

again.

digital

voltmeter

“

Front

eras)

Channel

Display

Adjustment

Set

the

BAND

SELECT

switch

VHE.

Turn

the

TUNING

knob

fully

clockwise.

Turn

the

TUNING

knob,

set

the

dial

pointer

the

letter

“2”

dial

scale.

Adjust

RV151

for

the

optimum

picture.

the

area

where

off-the-air

signal

can

not

tuned

in,

adjust

RV151

for

2.2V

reading

VOM.

...

(V.L.

START)

Turn

the

TUNING

knob,

set

the

dial

pointer

the

letter

“6”

dial

scale.

Adjust

RV152

for

the

optimum

picture.

the

area

where

off-the-air

signal

can

not

tuned

in,

adjust

RV152

for

18V

reading

VOM.

...

(V.L.

END)

Turn

the

TUNING

knob,

set

the

dial

pointer

the

letter

‘‘7”’

dial

scale.

Adjust

RV153

for

the

optimum

picture.

the

area

where

off-the-air

signal

can

not

tuned

in,

adjust

RV153

for

8.4V

reading

VOM.

...

(V.H.

START)

Turn

the

TUNING

knob,

set

the

dial

pointer

the

letter

‘13’

dial

scale.

Adjust

RV154

for

the

optimum

picture.

the

area

where

off-the-air

signal

can

not

tuned

in,

adjust

RV154

for

20V

reading

VOM.

...

(V.H.

END)

When

tuning

all

the

off-the-air

signals

(VHF

CH2-13)

capable

receiving,

make

sure

that

the

dial

pointer

correctly

set

the

dial

scale.

—

BOARD

—

L202

L203

VIF

and

AFT

Adjustments

Tune

off-the-air

signal.

Adjust

L202

(VIF)

and

L203

(AFT)

for

the

best

picutre.

Set

the

BAND

SELECT

switch

UHF.

Turn

the

TUNING

knob,

set

the

dial

pointer

the

letter

‘‘69”

dial

scale.

Adjust

RV155

for

the

optimum

picture.

the

area

where

off-the-air

signal

can

not

tuned

in,

adjust

RV155

for

22V

reading

VOM.

...

(U.LEND)

When

tuning

all

the

off-the-air

signals

(UHF)

capable

receiving,

make

sure

that

the

pointer

correctly

set

the

dial

scale.

ead

RV2071

AGC

Adjustment

Tune

off-the-air

signal.

Adjust

RV201

that

snow

noise

disappears

from

the

picture.

FD-42A

FD-42

SECTION

Waveforms

DIAGRAMS

pair

aii

teers

—

corp

cee

epee

nen

etree

tins

nat

I--|

ae:

10_

2-1.

MOUNTING

DIAGRAM

fender

ami

lca

cae)

Siete

{

12}

yore

See

page

for

Semiconductor

Lead

Layouts.

: i

‘

‘ee

ipa

MOUNTING

DIAGRAM

Note

‘

i”

ej{fe

MELF

component.

TE)

BOARD:

wen

Parag

accu

eat

CaP

0.6Vp-p

4.5MHz

28Vp-p

‘l

“

¥90i

BATT

CASE

SECTION

PHO

CRT

043M

SCHEMATIC

DIAGRAM

Note

haa

ees

—

All

capacitors

are

pales

otherwise

noted.

pF:

MHF

ore

ody

Benseia

—_

less

are

not

indicated

except

for

electrolytics

Het

rer

GetleaNGN

KRIaiS

and

tantalums.

Pen

‘3:

0.2Vp-p

(14°

sovp-p

All

resistors

are

and

!/,W

less

unless

otherwise

‘

specified.

)

memmemi>

YIDEO

signal

path.

care

ieee

os.

PPP

wmuseemep

AUDIO

signal

path.

oeteh

eae

Nev

wom

B+

bus.

oT.

Seo.

Pest

(___]

adjustment

for

repair.

Cone

Power

voltage

and

fed

with

power

suppiy

from

;

jack.

Voltages

are

with

respect

ground

under

no-signal

conditions.

io]

Voltage

variations

may

noted

due

normal

produc-

“

tion

tolerances.

‘

©:

waveform

numbers.

L—

—

Waveforms

are

taken

ground

color

ber

signal

receiv-

1.9Vpp

ing

mode

using

osilloscope.

hoa

Voltage

variations

may

noted

due

normai

produc-

tion

tolerances.

pass

| |

Switch

fon

—

BAND

SELECT

(@)

Refer

“

POWER

(7)

0.44Vp-p

2st

cate

inc

\/\,

14v

2psec

Semiconductor

Location

;

8°

4.8Vp-p

Ref.

No.

Location

Ref.

No.

Location

D151

G-8

Q151

G-6

;

D152

H-8

Q201

G-6

D401

1-15

Q301

B-12

D501

E-14

Q302

B-12

o.8vpp

veep

D503

E-12

401

B-14

{

fee

D601

E-16

Q402

C-14

D602

E-17

Q551

D-12

aces

D651

D-17

Q552

D-12

ney

D801

G-17

Q601

F-15

pais

cana

D802

H-17

Q602

F-17

100

avpp

1.svpp

D803

H-16

Q651

C-17

D804

1-15

Q652

D-17

D805

1-13

Q801

G-16

Sete

D806

1-12

Q802

H-16

D807

1-14

Q803

G-16

b—»—

D851

J-12

Q804

1-12

ore

D852

J-14

Q805

1-13

Q806

1-13

ists

1C201

1-3

Q851

J-12

1C451

B-16

Q852

1-14

—-o18v

ees

IGS)

hele:

COBSS.

pol

eee

Nee?

Cee

Seren

eet

—

oats

[oar

eet

FaeN

1C601

C-16

“Tt

eee

Seamer

faqs

FD-42A

BOARD]

[EJ

BOARD]

BATT

CASE

SECTION

ORY

BATTERY

UM-

2x4

6VDC

SIZE

“e"

(IEC

DESIGNATION

R14)

PCS

901

CRT

O4JM

[om

BOARD

}

BAND

SELECT

othess

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