Sony Cfs-903l User manual

SERVICE

MANUAL

ree

UK

Model

Tuner

frequency

range

FM:

87.6—107MHz

\F

Frequency

response

Speakers

Outputs

SPECIFICATIONS

Model

Name

Using

Similar

Mechanism|

CFS-W401L

Tape

Transport

Mechanism

Type

MF-903-78D

MW:

531

—1,602kHz

LW:

153—281kHz

SW:

5.95—18MHz

10.7MHz

(FM),

455kHz

(MW)

80Hz—10,000Hz

10cm

(4

in.)

dia..

full

range

x2

Headphones

jack

(stereo

minijack)

for

8—3000hm

impedance

headphones

Maximum

power

output

Power

requirements

Battery

life

Dimensions

Weight

Accessory

supplied

Note:

4.4W

(2.2W

+

2.2W)

9V

OC,

six

R14

(size

C)

batteries

DC

IN

9V

jack

accepts:

AC

power

adaptor

(supplied)

DO

NOT

IMMERSE

IN

WATER

Power

requirements

(supplied

AC

power

adaptor)

©

Before

opening

or

shutting

the

cassette

holder

or

battery

UK

model:

240V

AC,

50Hz

compartment

lid,

be

sure

to

wipe

off

water,

dust

or

sand

on

AEP

model:

220V

AC,

50Hz

_

;

the

outside

of

the

unit.

ee

be

Eeryreore

toprlonel)

tar-cle

aie

5

Water

lt

the

headphones

jack

may

cause

rusting.

Cover

the

jack

with

the

attached

rubber

cap

when

the

headphones

are

Batteries

FM

recording

Sony

SUM-2

(NS)

Approx.

7.5

hours

not

used.

:

Sony

AM2

alkaline

Approx.

27

hours

°

If

the

unit

is

splashed

with

salt

water

wipe

clean

with

a

damp

Approx,

440

x

202x

128mm

(w/h/d)

cloth,

then

dry

with

a

soft

dry

cloth.

Do

NOT

wash

under

run-

(17

3/8x8x5

1/8

inches)

incl.

projecting

parts

and

ning

water;

do

NOT

use

soap

or

detergent:

do

NOT

dry

with

controls

an

electric

hair

dryer.

Approx,

2.65kg

(5

Ib

1302)

incl.

batteries

¢

The

supplied

AC

power

adaptor

is

not

water

resistant.

To

AC

power

adaptor

(1)

prevent

shock

hazard,

avoid

using

the

set

near

water

during

AC

operation.

This

appliance

conforms

with

EEC

Directives

76/889

and

82/499

regarding

interference

suppression,

Design

and

specifications

subject

to

change

without

notice.

MICROFILM

RADIO

CASSETTE-CORDER

ON

Y.

‘CFS-903L

TABLE

OF

CONTENTS

Section

Title

Page

Specifications

ee

rem

ee

et

ee

]

Do

Not

Immerse

in

Water

-ccccecr

ttt

1

SECTION

1.

GENERAL

Parts

Identification

ssc

crr

ttt

2

SECTION

2.

DISASSEMBLY

-------+*ccc

crt

3

SECTION

3.

MECHANICAL

ADJUSTMENTS:

*°***~

eid

SECTION

4.

ELECTRICAL

ADJUSTMENTS

--------

4

SECTION

5.

DIAGRAMS

5-1.

Semiconductor

Lead

Layouts

----++*+*7

"

7

5-2.

Schematic

Diagram

(Tuner

Section)

---------:

7

5-3.

Schematic

Diagram

(AUDIO

Section)

----+-+*-°-

9

5-4.

Printed

Wiring

Boards

---*+crcct

tert

11

SECTION

6.

EXPLODED

VIEWS---++ssec

cect:

13

SECTION

7.

ELECTRICAL

PARTS

LIST

----***°-

18

SECTION

1

GENERAL

[PARTS

IDENTIFICATION]

FUNCTION

selector

FM

telescopic

antenna

Tape

operation

buttons

BAND

selector

TONE

control

OPR/BATT

indicator

VOLUME

control

FINE

TUNING

knob

TUNING

knob

DC

iN

9V

jack

PHONES

jack

Cassette

holder

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A

OR

DOTTED

LINE

WITH

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

IN

SUPPLEMENTS

PUB-

LISHED

BY

SONY.

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

FRONT

CABINET

ASSEMBLY

jonaie

HANDLE

ASSEMBLY

TUNING

KNOB

@

Remove

the

two

hooks,

handle

TEX

hook

Tew

screwdriver

NS

aN

2

ROR

Se

DB

BE

co)

‘

dial

pointer

DIAL

POINTER

SETTING

Orturn

the

tuning

shaft

fully

counterclockwise.

Oset

the

left

side

of

the

dial

pointer

to

the

scratched

life

on

the

tuning

chassis.

(Arrow

scratched

line

ao:

=

"@

tuning

chassis

@

+BVTP3

x

20

@

+BVTPS

x

20

(5

pes.)

@

side

panel

(right

@

+RKTP3

x8

two

portions:

There

is

the

same

part

on

the

opposite

side.

@

tuning

chassis

)

@

+BVTP3

x

12

assembly

tuning

shaft

jae

Meat

a

SECTION

3

MECHANICAL

ADJUSTMENTS

PRECAUTION

Clean

the

following

parts

with

a

denatured-alcohol-

moistened

swab:

record/playback

head

pinch

roller

erase

head

rubber

belts

capstan

idlers

Demagnetize

the

record/playback

head

with

a

head

demagnetizer.

(Do

not

bring

the

head

demagnetizer

close

to

the

erase

head.)

Do

not

use

a

magnetized

screwdriver

for

the

adjustments.

After

the

adjustments,

apply

suitable

locking

compound

to

the

parts

adjusted.

The

adjustments

should

be

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

Power

supply

voltage:

9V

dc.

Torque

Measurement

Torque

meter

Meter

reading

30

—75

g-cm

0.42

—

1.04

oz-inch

CQ-102C

(

0z-inch)

FWD

2-6

g-cm

back

tension

(0.03

—

0.08

oz-inch)

30

~—

75

g-cm

(0.42

—

1.04

oz-inch)

CQ-102RB

-

REV

2-6

g-cm

back

tension

(0.03

—

0.08

oz:inch)

60

—130g-cm

C08

(0.83

—

1.81

oz-inch)

Tape

Tension

Measurement

Tension

meter

Meter

reading

CQ403A

more

than

90

g

CQ-403R

(more

than

3.18

02)

Head

Height

Adjustment

1.

Install

a

mirror

cassette.

(CQ-009C:

Part

No.

8-909-708-01)

2.

In

record

mode

and

viewing

from

the

front,

ad-

just

the

head

height

to

eliminate

tape

curl

and

tape

twist

at

portions

of

arrow.

3.

Perform

this

adjustment

in

both

FWD

and REV

modes.

“Sree

erase

head

record/playback

head

Low

z=

|2

3-573~-138-01

(t=0.

1)

a

3-573-138-11.

(t=0.

2)

Shim,

head

height

adjustment

C

AN

{

SECTION

4

ELECTRICAL

ADJUSTMENTS

3-1.

TAPE

RECODER

SECTION

eTest

Tape

ee

WS.-48A

3kHz,

0dB

tape

speed

adjustment

P-4-A063

6.3kHz,

—30dB

head

azimuth

adjustment

REC/PB

Head

Azimuth

Adjustment

Perform

adjustment

in

both

FWD and

REV

modes.

After

adjustment,

confirm

the

specification

in

FWD

mode.

Procedure:

1.

Mode:

playback

test

tape

P-4-A063

(6.3kHz,

—10dB)

320

Headphones

jack

2.

Turn

the

adjustment

screw

for

the

maximum

output

levels.

If

these

levels

do

not

match.

turn

the

adjustment

screw

until

both

of

output

levels

match

together

within

3dB,

Fe

within

Output

308

level

R-CH

screw

peak

position

L-CH

R-CH

angle

peak

3.

Phase

Check

Mode:

playback

test

tape

P.4-A063

oscilloscope

(6.3kHz,

—

10d)

320

in

phase

-

45°

REV

FWD

a

OM

3-2.

RADIO

SECTION

AM

SECTION

Procedure:

Setting:

Mode:

playback

FUNCTION

switch:

AM

(MW/LW/SW)

Tape

Speed

Adjustment

speed

checker

LFM-30

FINE

TUING:

mechanical

mid

or

AM

ff

signal

digital

frequency

generator

test.

tape

sounter

Put

the

lead-wire

WS-48A

antenna

close

to

(3kHz,

OdB)

pe

the

set.

322

oO

a

Pe

|

Headphones

jack

CS

ed

30%

amplitude

modulation

by

400Hz_

signal

VIVM

(range:

0.5-5V

ac)

Adjustment

Value:

+3%

2,910

to

3,090

Hz

Frequency

difference

between

the

beginning

and

the

end

of

the

tape

should

be

within

1.5%

(45Hz).

Headphones

jack

¢

Repeat

the

procedures

in

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

be

finally

done

by

the

trimmer

capacitors.

Adjustment

Location:

AM

IF

ADJUSTMENT

Adjust

for

a

maximum

reading

on

VTVM.

adjustment

resistor

M301

LS:MW

FREQUENCY

COVERAGE

Adjust

for

a

maximum

reading

on

VIVM.

160kHz

260kHz

L7:LW

FREQUENCY

COVERAGE

L8:SW

TRACKING

*

7MHz

*:

Extend

telescopic

antenna

fully.

FM

SECTION

Setting:

VCO

Adjustment

FUNCTION

switch:

FM

ft

signal

Procedure:

generator

.

FM

ff

signal

telescopic

generator

antenna

400Hz,

30%

FM

modulation

frequency

deviation

+22.5kHz

output

level:

as

low

as

possible

Carrier

frequency:

98MHz

telescopic

Modulation

:

no

modulation

antenna

lead

Output

level:

0.1V

(100dB)

1.

Connect

frequency

counter

to

TP

(VCO).

2.

Tune

the

set

to

98MHz.

3.

Adjust

RV1

for

76kHz+500Hz

reading

on

the

frequency

counter.

Adjustment

Location:

tuner

board

(component

side)

frequency

counter

r-CT6:SW

FREQUENCY

COVERAGE

CT7:LW

FREQUENCY

COVERAGE

TI:AM

IF

°

Li:FM

TRACKING

L2:FM

FREQUENCY

COVERAGE

CT2:FM

FREQUENCY

COVERAGE

A

[o]

»

a.

@

|

&

L3:MW

TRACKING

CT1:FM

TRACKING

RV1:FM

VCO

CT10:LW

TRACKING

L10:LW

TRACKING

CT3:MW

TRACKING

CT4:MW

FREQUENCY

COVERAGE

SECTION

5

DIAGRAMS

Note

on

Schematic

Diagram:

@

All

capacitors

are

in

uF

unless

otherwise

noted.

pF:

uur

5OWV

or

less

are

not

indicated

except

for

electrolytics

and

tantalums.

@

All

resistors

are

in

Q

and

,W

¢

or

less

unless

otherwise

specified.

@

Tota!

current

is

measured

with

no

cassette

installed.

@

Power

voltage

is

de

9

V

and

fed

with

regulated

dc

power

supply

from

external

power

voltage

jack.

e

Voltages

are

dc

with

respect

to

ground

under

no-signal

(detuned)

conditions.

RADIO

SECTION

no

mark:

FM

(

):

AM

AUDIO

SECTION

no

mark:

PB

(

):

REC

((

):

AMS

©

Voltages

are

taken

with

a

VOM

(10

MQ/V).

Voltage

variations

may

be

noted

due

to

normal

produc-

tion

tolerances,

@

Signal

path.

=

:FM

XD

:PB

xX»

:

REC

5-1.

SEMICONDUCTOR

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LAYOUTS

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SCHEMATIC

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(Tuner

Section)

(TUNER

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M301

REEL /CAPSTAN

MOTOR

SP2

SPEAKER

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On

A

W

12

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SECTION

6

EXPLODED

VIEWS

NOTE:

@

The

mechanical

parts

with

no

reference

number

in

the

exploded

views

are

not

supplied.

e@

The

construction

parts

of

an

assembled

part

are

indicated

with

a

collation

num-

ber

in

the

remark

column.

@

[tems

marked

‘x’

are

not

stocked

since

they

are

seldom

required

for

routine

service.

Some

delay

should

be

antici-

pated

when

ordering

these

items.

Due

to

standardization,

parts

with

part

number

suffix

-XX

and

-X

may

be

dif-

ferent

from

the

parts

specified

in

the

components

used

on

the

set.

Color

Indication

of

Appearance

Parts

Example:

(RED)

...KNOB,

BALANCE

(WHITE)

t t

Parts’

Color

Cabinet's

Color

1,

GENERAL

(1)

Part

No.

3-352-229-01

3-352-229-11

3-352-239-01

3~352-203-21

3-352-227-01

3-352-268-21

37-352-268-31

3-352-202-01

3-352-243-01

3-352-226-01

37352-238-11

*3-352-267-01

3-352-223-01

3-352-218-01

3-352-244-01

Description

(YEL)...LID,

CASSETTE

(YEL)

(WHT)...LID,

CASSETTE

(WHT)

SHEET

(B),

ADHESIVE

WINDOW,

CASSETTE

HOLDER,

CASSETTE

(YEL)...CABINET

(FRONT)

(YEL)

(WHT)...CABINET

(FRONT)

(WHT)

WINDOW,

DIAL

SHEET

(A),

ADHESIVE

PANEL

(LEFT),

SIDE

(GRY)

HANDLE

(GRY)

BRACKET

(C)

PLATE,

HANDLE

(GRY)

PACKING

(MD

BUTTON)

SHEET

(C),

ADHESIVE

Remarks

|

No.

Part

No.

Description

Remarks

14

3-352-228-01

(YEL)...LID,

BATTERY

CASE

(YEL)

3-352-228-11

(WHT)...LID,

BATTERY

CASE

(WHT)

15

3-352-225-01

PANEL

(RIGHT),

SIDE

(GR‘)

16

*3-352-208-01

BRACKET

(A)

7

3-352-209-01

SPRING

(CASSETTE)

18

3-319-224-31

DAMPER,

SMALL

19

=

*3-352-250-01

(AEP)...LABEL,

MODEL

NUMBER

*3-352-251-01

(UK)....LABEL,

MODEL

NUMBER

20

7-685-648-79

SCREW

+BVIP

3X12

TYPE2

IT-3

2]

7-685-246-19

SCREW

+RKTP

3X8

TYPE2

N-S

22

7-685-646-79

SCREW

+BVTP

3X8

TYPE2

N~-S

23

7-685-651-79

SCREW

+BVIP

3X20

TYPE2

IT-3

24

*3-880-474-01

CUSHION,

15X5xX0.3

25

37-831

-441-XX

CUSHION,

STOPPER

26

*9-911-843-XX

CUSHION

SP]

1-503-823-11

SPEAKER

SP2

1-503-823-11

SPEAKER

eae

2.

GENERAL

(2)

No.

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

53

Part

No.

*3-352~-230-01

*3-352-231-01

*3-352-224-01

*3-352-235-01

*3-352-219-01

*3-352-220-01

*3-352-271-01

*3-352-207-01

3-352-215-01

3-352-204-01

3-352-204-11

3-352-217-01

3-352-240-01

3-352-221-01

3-352-221-11

3-352~-212-01

3-352-236-81

3-352

-236-91

*3~-352-210-01

*3-352-206-01

3-352-234-01

3-352-234-31

g

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|

$96

307

Description

CHASSIS

(TUN)

PLATE,

INDICATION

POINTER

BUTTON

(DIR)

BUTTON

(B)

BUTTON

(A)

BRACKET

(D)

LEVER

(REC)

PACKING

(JACK)

(YEL)...KNOB

(VOL)

(YEL)

(WHT)...KNOB

(VOL)

(WHT)

PACKING

(FUNC)

SHEET

(D),

ADHESIVE

(YEL)...KNOB

(TUNING)

(YEL)

(WHT)...KNOB

(TUNING)

(WHT)

TERMINAL

(+

-),

BATTERY

(YEL)...CABINET

(REAR)

(YEL)

(WHT).

..CABINET

(REAR)

(WHT)

TERMINAL

BOARD,

ANTENNA

DRUM,

DIAL

(YEL)...KNOB

(FINE)

(YEL)

(WHT)...KNOB

(FINE)

(WHT)

not

supplied

SSS

Remarks

|

No.

69

70

7]

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

901

902

903

904

ANTI

not

supplied

Part

No.

3-352-245-01

3~-352-205-01

*3~352-216-01

*3-352-233-01

3-352-214-01

3-352-213-01

3-352-211-01

3-326-355-01

*3-352-201~01

37352-232-01

*3-352-222-01

7-685

-648-79

7-685-651~79

7-621-772-10

7-682-549-04

7~621-770~87

9-911

-844-XX

7-623-505-01

3-352-266-01

*A-3270-634-A

*]-630-149-21

*A-3270-636-A

*1-631-151-21

1-501

~436-11

Description

Remarks

SHEET

(E),

ADHESIVE

WINDOW

(LED)

KNOB

(FUNC)

KNOB

(MODE)

TERMINAL

(+),

BATTERY

TERMINAL

(-),

BATTERY

TERMINAL

BOARD

(ECM)

SHEET,

MIC

BRACKET

(B)

SPRING

(REVERSE)

SHAFT,

TUNING

SCREW +BVTP

3X12

TYPE2

11-3

SCREW

+BVTP

3X20

TYPE2

11-3

SCREW

+B

2X4

SCREW

+B

3X10

SCREW

+P

2.6X5

SPACER,

LEAF

LUG,

2

SPACER

PC

BOARD

ASSY,

AUDIO

PC

BOARD,

ECM

PC

BOARD

ASSY,

TUNER

PC

BOARD,

TRANSLATION

ANTENNA,

TELESCOPIC

3.

MECHANISM

(1)

(MF-903-78D)

No.

101

102

103

104

105

106

107

108

109

110

W

112

113

114

115

116

17

118

W9

120

117

116

Part

No.

Description

3-325-698-01

3-322-691-01

3-330-605-01

3-322

-527-01

7-6

-105-19

RING,

RETAINING

SPRING,

TENSION

(REC)

SPRING,

TENSION

SPRING,

TENSION

TPG

+P

2X8,

TYPE

2,

NON-SLIT

SPRING,

TENSION

(REW)

RETAINER,

LEVER

SCREW

(+

PTPWH)

(2.6X6)

SPRING,

TENSION

(PAUSE)

CUSHION

(T)

SPRING,

TENSION

LEVER

(B),

GEAR

LOCK

WASHER

(t=0.13)

FLYWHEEL

(FW)

ASSY

LEVER,

SELECTION,

S.OFF

3-322-679-01

*3-322-51

8-01

7-6

87-233~-11

3-322-679-01

3-831

-441-11

3-530-260-00

3-330-8@7-01.

3-701

~437-01

*X-334]

-303-1

*3-330-606-01

3-322

-533-01

3657-035

-XX

*3-322-519-01

7-6

8~134-19

3-322-566-01

BELT

BELT,

COUNTER

RETAINER,

THRUST

SCREW

(+

PTPWH)

(2.6X8)

BEARING,

PULLEY

134

135

136

137

138

139

140

Part

No.

3-307-94

8-01

3-330-83-01

3-322

-534-01

3-330-86-01

3-322-553-01

3-578-223-2)

3-322

-508-01

3-321-541-01

3-322

-659-01

3-313-384-01

*X

-334]

-302-1

3-322-660-01

3-545-715-00

X-3322

-502-1

3-322

656-01

3-322-511-01

3-322-526-01

3-701

-437-11

X-3322

-540-1

3-32

8-103-01

CFS-903L

Descr

iption

WASHER,

NYLON

LEVER

(C),

OA

SPRING

LEVER

(D),

OA

GEAR,

CAM

WASHER,

NYLON

GEAR,

REEL

SPRING,

COMPRESSION

WASHER

(A)

SPRING,

TENSION

FLYWHEEL

(RV)

ASSY

WASHER

(B)

WASHER

CLAW

ASSY,

REEL

GEAR,

FR

CLAW,

ERASING

PROTECTION

SPRING,

TENSION{POWER

TENSION)

WASHER

(t=0.25)

DETECTION

BLOCK

ASSY

SPRING,

TENSION

(FF)

CFS-903L

4.

MECHANISM

(2)

No.

(MF-903-78D)

Part

No.

151

152

153

154

155

156

157

158

159

160

16]

162

163

164

165

*3-330-604-01

*3-322

-5

87-01

X-3330-610-]

3-322

-555-01

*X-3322-505-1

*3-330-829-11

3-322-515-14

*3~322-5

8-11

3-322

~693~01

*3-322-584-11

*3-322-59]-11

*3-322-58-1]

3-32

8-102-01

*3-322-517-01

3~322-575-01

Description

Remarks

|

No.

Part

No.

PLATE

(C),

LOCK

166

3-322-554-01

PLATE

(B),

LOCK

J67.

*3-330-602-01

LEVER

(R)

ASSY,

S.OFF

168

3-322-577-03

LEVER

(E),

S.OFF

169

3-322-513-01

LEVER

ASSY,

FR

170

3-322

-6

89-01

LEVER

(C),

PAUSE

BUTTON

Mm

3-343-146-01

LEVER,

REW

BUTTON

|

172

3-322-576-01

LEVER,

FF

BUTTON

173

*X-3339-320-1

SPRING,

TENSION

174

3-322

-579-01

LEVER,

PLAY

BUTTON

175

*3-322-5

89-01

LEVER,

REC

BUTTON

176

3-322

-578-01

LEVER,

STOP

BUTTON

W77

A~3102-061

-A

SPRING,

TENSION

(POWER

TENSION)

178

=

3-322-520-01

“LEVER,

AMS

179

3-570-615-00

SPRING

Description

Remarks

ARM,

REC

LOCK

LEVER

(R),

DIRECTION

SPRING

COLLAR

RING

GEAR

(A),

FWD

SPRING

ARM

ASSY

(M),

FWD

GEAR

SPRING

.

LEVER,

SWITCH

SPRING

CHASSIS

ASSY

SPRING,

TENSION

POLY-WASHER

(DIA.1.2)

Sony CFS-903L User manual

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