Sony SRF-M100 Manuel utilisateur

SERVICE

MANUAL

SRF-M100

AEP

Model

SPECIFICATIONS

Frequency

range

FM:

87.5

—

108

MHz

0.05

MHz*

AM:

531

—

1602

kHz

The

frequency

display

raised

lowered

steps

0.1

MHz.

(Example:

Frequency

88.05

MHz

displayed

88.00

MHz.)

FM:

10.7

MHz

AM:

450

kHz

Speaker

4.4

3/4

inches),

7.2

ohms

Output

Stereo

earphones

jack

(stereo

3.5mm,

load

impedance

ohms)

Power

output

(at

10%

harmonic

distortion)

Power

requirements

DC,

two

(size

AA)

batteries

Battery

life

(using

Sony

batteries

SUM-3

(NS))

Earphones:

FM:

Approx.

hours

AM:

Approx.

hours

Speaker:

FM:

Approx.

hours

AM:

Approx.

hours

Dimensions

Approx.

121

(wih/d)

7/8

1/8

inches)

incl.

projecting

parts

and

controls

Mass

Approx.

198

(7.0

02.)

incl.

batteries

Supplied

accessory

Stereo

earphones

(1)

Design

and

specifications

are

subject

change

without

notice.

STEREO/AM

PLL

SYNTHESIZED

RECEIVER

SONY.

TABLE

CONTENTS

Section

Title

Page

Specifications

eee

ray

]

GENERAL

Location

Controls

eee

Installing

Batteries

eee

iris

Setting

the

Clock

eee

Operating

the

Radio

rir

Preset

Tuning

ORD

eee

meee

memes

eee

ene

eee

eens

eee

eenesenensneeere

Sound

the

Beep

Desired

Time

Cem

nme

cerns

enanseceeesseureens

‘DISASSEMBLY

essnseciessdce

cents

nai

vvsen

eatavactorsenaeeys

DESCRIPTION:

--:--cceeccesceccceeccsccscessceecescenecoeeees

ELECTRICAL

ADJUSTMENTS

-oeeesesseseeeeeeerseeeeeeereees

DIAGRAMS

5-1.

Printed

Wiring

Boards

<srrrrsseeessereeeeeeeeeeereeneeeneees

5-2.

Schematic

Diagram

deem

mene

eer

etennneee

see

eeeserenesenenes

EXPLODED

VIEW

iisicsecsnesecnsiaiieas

shevecdeerceresnareanneans

ELECTRICAL

PARTS

LIST

---------eeesseersrereeeeeseee

rene

Flexible

Circuit

Board

Repairing

@®

Keep

the

temperature

the

soldering

iron

around

270°C

during

repairing.

not

touch

the

soldering

iron

the

same

conduc-

tor

the

circuit

board

(within

times).

®@

careful

not

apply

force

the

conductor

when

soldering

unsoldering.

Notes

chip

component

replacement

Never

reuse

disconnected

chip

component.

Notice

that

the

minus

side

tantalum

capacitor

may

damaged

heat.

SECTION

GENERAL

Front

panel

Rear

panel

Display

window

(Ob.E

Reverv

eye)

meal

cam

STEREO

indicator

Lights

when

stereo

program

received.

[2]

Display

window

Speaker

[4]

ENTER/CLOCK

button

[5]

TIMER

button

BAND

selector

ALARM

button

AUTO

OFF/POWER

switch

[9]

VOLUME

control

PRESET

and

—

buttons

PHONES

(stereo

earphones)

jack

Earphones

Extend

the

earphone

cord

serves

the

antenna.

disconnecting

the

earphone

cord,

the

sound

heard

from

the

speaker.

The

sound

coming

through

the

speaker

monaural.

eIae)

STEREO/MONO

(stereo/monaural)

selector

TUNE

(tuning)/TIME

SET

and

—

buttons

Battery

compartment

Telescopic

antenna

Extend

the

telescopic

antenna

illustrated.

Battery

indicator

Flashes

when

the

batteries

become

weak,

Alarm

indicator

Appears

when

you

set

the

alarm.

Timer

indicator

Appears

when

you

set

the

timer.

Frequency

indicator

Appears

while

the

radio

on.

Band

indicator

[22]

PRESET

and

preset

number

indicators

Time

indicator

Appears

when

the

radio

off.

This

section

extracted

from

instruction

manual.

Two

(size

AA)

batteries

with

correct

polarity

Installing

Batteries

insert

two

(size

AA)

batteries

with

correct

polarity.

When

you

insert

the

batteries

for

the

first

time,

0:00

flashes

the

display

window.

stop

flashing,

press

ENTER/CLOCK.

Knowing

when

replace

the

batteries

When

the

batteries

become

weak,

the

radio

turned

off,

the

time

indicator

appears

and

“cq”

flashes

the

display

window.

(The

sound

may

become

weak

distorted

before

“‘csa”

starts

flashing.)

Replace

both

batteries

with

new

ones.

Even

after

you

replace

the

batteries,

“cosa”

remains

flashing.

turn

off

“cs”,

slide

AUTO

OFF/POWER.

Replace

the

batteries

within

about

seconds

after

turning

off

the

power.

than

seconds

has

passed,

the

preset

stations

are

canceled

and

the

time

indicator

shows

0:00.

this

case,

perform

the

clock

setting

and

preset

tuning

again.

Notes

the

battery

Insert

the

batteries

with

correct

polarity.

not

mix

new

and

used

batteries.

The

batteries

cannot

charged.

avoid

damage

from

possible

battery

leakage,

remove

the

batteries

when

the

unit

will

not

used

for

long

time.

Concerning

the

battery

life,

see

“Specifications”.

Setting

the

Clock

When

you

set

the

clock,

turn

off

the

radio.

While

keeping

ENTER/CLOCK

pressed,

press

TUNE/TIME

SET

—

button

until

the

display

shows

the

current

time.

Press

increase

—

decrease

the

digits.

When

you

keep

the

button

pressed,

the

digits

change

rapidly.

While

setting

the

time,

“:"

flashing.

0:00

midnight

12:00

noon

When

the

display

shows

the

current

time,

release

ENTER/CLOCK.

“?"

stops

flashing

and

the

clock

starts

operating.

set

the

clock

the

second

After

adjusting

the

time,

keep

ENTER/CLOCK

pressed.

Release

ENTER/CLOCK

using

the

time

signal

reference.

eee

ule

Mteleom

While

pressing

the

green

button,

slide

AUTO

’

OFF/POWER

the

direction

the

mark

turn

the

power.

Select

with

BAND.

Tune

the

desired

station

pressing

TUNE/TIME

SET

—

button.

each

press

—,

the

frequency

changes

0.05

MHz

higher

lower

(the

display

changes

0.1

MHz)

and

the

frequency

changes

kHz

higher

lower.

change

the

frequency

rapidly,

keep

the

button

pressed.

Adjust

VOLUME.

turn

off

the

radio

Slide

AUTO

OFF/POWER

again.

The

display

shows

the

current

time.

When

the

power

turned

off

automatically

The

radio

will

turned

off

automatically

after

about

minutes

prevent

unnecessary

wear

the

batteries.

continue

listening

the

radio,

slide

AUTO

OFF/POWER

again.

the

batteries

are

exhausted,

the

power

turned

off

automatically

protect

the

preset

contents.

receive

stereo

program

stereo

Use

the

earphones.

The

sound

coming

through

the

speaker

monaural.

Preset

Tuning

Once

you

store

the

desired

stations,

you

can

tune

them

simple

operation.

You

can

store

stations

for

each

the

and

bands.

Presetting

the

Station

Turn

the

power.

Tune

the

desired

station

preset.

See

“Operating

the

Radio”.

Keep

ENTER/ICLOCK

pressed

for

than

second.

Release

ENTER/CLOCK

when

PRESET

and

the

preset

number

indicator

flash

the

display

window

with

the

beep

sound.

Select

preset

number

from

pressing

the

PRESET

—

button.

Press

increase

the

digit.

(12>...

+67)

Press

—

decrease

the

digit.

(7>6—>.

-*2->1)

eae

Press

ENTER/CLOCK

again.

Beep-beep

sounds,

and

PRESET

and

the

preset

number

stop

flashing.

The

station

has

been

stored.

preset

other

stations,

repeat

steps

Note

the

step

while

the

PRESET

and

preset

number

are

flashing

(for

about

seconds).

Otherwise

the

unit

returns

step

this

happens,

try

again

from

step

Tuning

Preset

Station

Turn

the

power.

Select

the

band,

AM.

Select

the

desired

preset

number

pressing

the

PRESET

—

button.

Adjust

VOLUME.

change

the

preset

station

Tune

the

desired

station

newly

preset.

Preset

the

tuned

station

the

desired

button.

The

station

previously

preset

that

button

canceled.

Improve

Radio

Reception

FM:

Extend

the

telescopic

antenna

and

adjust

the

angle

the

antenna

that

the

sensitivity

will

increased.

AM:

ferrite

bar

antenna

built

for

reception.

Rotate

the

unit

horizontally

for

optimum

reception.

the

stereo

program

noisy

Usually

set

STEREO/MONO

STEREO.

You

can

receive

the

stereo

program

stereo,

using

the

earphones.

When

the

signal

weak

and

noisy,

set

MONO.

There

will

stereo

effect,

but

the

sound

will

improve.

Sounding

the

Beep

Desired

Time

You

can

make

the

unit

sound

its

beep

through

the

speaker

the

earphones

desired

time.

Use

this

feature

remind

you

appointment,

etc.

There

are

two

ways

setting:

Timer

setting—to

sound

the

beep

certain

number

minutes

later

than

the

present.

Alarm

setting—to

sound

the

beep

certain

time.

You

can

set

the

timer

and

alarm

while

the

radio

either

off.

Setting

the

Timer

[ej

While

keeping

TIMER

pressed,

press

TUNE/TIME

SET

or—

button

store

the

desired

period

minutes

after

which

you

want

the

beep

sound.

You

can

store

periods

from

180

minutes

one

minute

intervals.

flashes

the

display

window

while

you

press

TIMER.

sound

the

beep

after

minutes,

for

example,

while

keeping

TIMER

pressed,

press

TUNE/TIME

SET

—

until

appears

the

display

window.

Release

TIMER.

©)

stops

flashing.

The

display

returns

the

current

time

the

frequency

which

was

shown

before

you

pressed

TIMER

start

the

timer

setting.

When

the

stored

period

has

passed,

)

flashes

and

the

beep

sounds.

cancel

the

timer

setting

Press

TIMER

again.

disappears.

stop

the

beep

Press

any

button.

you

not

stop

the

beep,

the

beep

stops

automatically

after

about

minutes.

When

the

beep

sounds

while

you

are

fistening

the

radio,

the

radio

reception

stops

and

resumes

when

the

beep

stops.

Setting

the

Alarm

[J]

Make

sure

that

the

clock

correctly

set.

(See

“Setting

the

Clock”.)

White

keeping

ALARM

pressed,

press

TUNE/TIME

SET

—

button

set

the

time

you

want

the

beep

sound.

)

flashes

while

you

press

ALARM.

set

the

alarm

for

7:00

the

morning,

for

example,

while

keeping

ALARM

pressed,

press

TUNE/TIME

—

until

7:00

appears

the

display

window.

Release

ALARM.

stops

flashing.

The

display

returns

the

current

time

the

frequency

which

was

shown

before

you

pressed

ALARM

start

the

alarm

setting.

When

the

time

comes,

()

flashes

and

the

beep

sounds.

cancel

the

alarm

setting

Press

ALARM

again.

()

disappears.

stop

the

beep

Press

any

button.

you

not

stop

the

beep,

the

beep

stops

automatically

after

about

minutes.

When

the

beep

sounds

while

you

are

listening

the

radio,

the

radio

reception

stops

and

resumes

when

the

beep

stops.

Notes

When

0:00

flashes,

you

cannot

set

the

alarm.

When

you

stop

the

beep,

the

timer

setting

canceled.

The

alarm

setting

remains.

Even

you

are

listening

radio,

you

can

set

the

timer

and

alarm.

SECTION

DISASSEMBLY

Note

the

disassembly

procedure

the

numerical

order

given.

2-1.

CABINET

(REAR)

2-3.

MAIN

BOARD

4+B2

+82x6

ees

Battery

case

@+B2x8

™%

}

PEA

Cabinet

(Rear)

‘

Press

the tab

shown

the

arrow.

Insert

flat-tipped

screwdriver

the

groove

between

the

front

cabinet

and

Pies

tab

SHOW

Meow,

the

rear

cabinet

open.

2-2.

CABINET

(FRONT)

2-4.

MICROCOMPUTER

BOARD

+826

+82

Microcomputer

board

Press

the tab

shown

the

arrow.

SECTION

DESCRIPTION

description

PD1724GB-555-1A7

(IC101)

LCD

drive

segment

signal

output.

number

-[2

—

APN

owo

bdo

LCD

drive

common

signal

output

—

—_

VSS3

CAP2

CAP1

CGP

BUZZER

Terminals

used

for

connecting

capacitor

doubler

circuit

which

supplies

LCD

drive

voltage.

VSS2

Audio

mute

output

signal.

Active

when

Low.

Audio

noises

are

reduced

before

and

after

the

mute

signal

when

PLL,

radio

power

supply

key

srtobe

change

controlled.

Buzzer

output

using

CGP.

Sound

check

keys,

check

settings,

indicate

that

setting

time

timer

reached

alarm

produced

using

two

kinds

musical

intervals

and

the

sound

modulation.

nN Oo

pels!

ie)

VCOH

VHF

VCOM

VCO

VCOL

VCO

VSS1

EOI

EO1

Not

use

with

this

machine.

EO2

EQ2

power

supply

input

terminal.

Detects

the

voltage

reduction

the

battery.

When

the

battery

energy

reduced,

the

microcomputer

the

reducedvoltage

mode.

The

battery

mark

blinks

and

the

microcomputer

waits

for

clock’s

reset/display

and

Power

Key.

quartz

oscillating

element

connecting

terminal.

(75kHz)

Connected

to a

capacitor

for

regulator

circuit

which

supplies

the

oscillator’

stable

drive

voltage.

Time

display

switching

input.

24-hour

system

display

when

Low

and

12-hour

system

display

(AM/PM)

when

High.

When

the

setting

changed,

backup

power

supply

must

set

OFF

and

internal

RAM

must

initialized.

ON/OFF

switching

output

for

the

radio

power

supply.

(ON

High

OFF

LOW)

Strobe

output

for

initial

switch

input.

INIT

OUT

(Active

High)

o——+

INITIN

12-/24-hour

system

display

LOW

(OFF)

24-hour

system

display,

Hgih

(ON)

12-hour

system

dispaly

o——»>

INIT

Band

selection

Not

use

with

this

machine.

ies)

VSS4

‘

OO Ww

PA3

INIT

IN1

PA2

POWER

OUT

PAI

INIT

OUT

number

1-bit

input

which

sets

two

kinds

receiving

band

versions.

When

the

setting

PAO

INIT

IN2

changed,

backup

power

supply

must

set

OFF

and

internal

RAM

must

initialized.

Cas

BEEP

Vol

BEEP

volume.

Output

for

increasing

the

volume

the

BEEP

sound

when

setting

time

timer

reached

alarm

ON.

The

volume

increased

when

high.

ten

aca

(50

ane

Pap

Key

SOURCE

Key

RETURN

1-bit

output

which

sets

two

kinds

receiving

bands.

Two

settings

are

followes.

AM=H,

FM=L,

POWER

OFF

Strobe

and

return

signals

4 key

matrix.

strobe

signal

change

makes

audio

noise.

strobe

signal

must

set

the

fixed

value

when

key

input

not

changed.

When

the

key

input

decoded,

the

mute

signal

must

added.

SECTION

ELECTRICAL

ADJUSTMENTS

sure

perform

tracking

adjustment

after

having

made

frequency

coverage

adjustment.

Setting:

BAND

STEREO

/MONO

MONO

signal

generator

Put

the

jead-wire

antenna

the

set.

Phones

jack

30%

amplitude

modulation

400Hz

Signal.

Output

level

low

possible.

Adjustment

Procedure

Set

the

frequency

the

set

and

SSG

531

KHz.

Adjust

that

the

reading

VTVM

becomes

maximum.

Refer

the

diagram

below

for

the

final

characteristics.

(final

characteristics)

{MAIN

BOARD

(Conductor

side)]

{MAIN

BOARD

(Component

side))

digital

voltmeter

Frequency

Coverage

Adjustment

Tracking

Adjustment

Procedure

Set

the

frequency

the

set

and

SSG

531kHz.

Set

the

frequency

the

set

and

SSG

585kHz.

Adjust

that

the

voltage

between

TP4

and

the

Adjust

that

the

reading

VTVM

becomes

ground

becomes

0.05V.

maximum.

Set

the

frequency

the

set

and

SSG

1,602kHz.

Set

the

frequency

the

set

and

SSG

1,485kHz.

Adjust

CT3

that

the

voltage

between

TP4

and

the

Adjust

CT1

that

the

reading

VTVM

becomes

ground

becomes

7.3

0.05V.

maximum.

Repeat

the

adjusting

steps

above

two

three

times.

Terminate

the

tracking

adjustment

adjusting

the

trimmer

capacitor.

sure

perform

tracking

adjustment

after

having

Frequency

coverage

and

Taking

Adjustment

Setting:

BAND

STEREO

/MONO

MONO

VTVM

signal

generator

Phones

jack

(CJ

22.5kHz,

frequency

deviation

400

signal.

Output

level

low

possible

digital

voltmeter

(MAIN

BOARD

(Component

side)]

Frequency

Coverage

Adjustment

Procedure

Set

the

frequency

the

set

and

SSG

108.0MHz.

Adjust

that

the

voltage

between

TP4

and

the

ground

becomes

9.5

1.5V.

made

frequency

coverage

adjustment.

(MAIN

BOARD

(Conductor

side)]

Tracking

Adjustment

Procedure

Set

the

frequency

the

set

and

SSG

87.5MHz.

Adjust

that

the

reading

VTVM

becomes

maximum.

Set

the

frequency

the

set

and

SSG

108.0MHz.

Adjust

CT2

that

the

reading

VTVM

becomes

maximum.

Repeat

the

adjusting

steps

above

two

three

times.

Terminate

the

tracking

adjustment

adjusting

the

trimmer

capacitor.

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