Sony Walkman WM-FX267 Bedienungsanleitung

MICROFILM

SERVICE MANUAL

RADIO CASSETTE PLAYER

US Model

WM-FX267/FX269

AEP Model

E Model

WM-FX267

Model Name Using Similar Mechanism WM-FX251

Tape Transport Mechanism Type MF-WMFX251-114

• Frequency range

FM: 87.5-108MHz

AM: 530-1710kHz (US)

AM: 531-1602kHz (EXCEPT US)

• Power requirements

3V DC batteries AA (R6) ×2/External DC 3V

power sources

• Demensions

115 ×90.5 ×34.4mm (4 5/8×3 5/81 3/8inches) (w/h/d)

incl. projecting parts and controls

• Mass

Approx. 150g (5.3 oz)

Approx. 230g (8.2 oz) incl. batteries and a tape

• Supplied accessories

Stereo headphones or earphones (1)

Carrying case (1)

Design and specifications are subject to change without notice.

SPECIFICATIONS

WM-FX267/FX269

Photo: WM-FX267 US model

Ver 1.3 2000. 05

With SUPPLEMENT-1

(9-923-300-81)

With SUPPLEMENT-2

(9-923-300-82)

– 2 –

TABLE OF CONTENTS

1. GENERAL .................................................................. 3

2. DISASSEMBLY ........................................................ 6

3. MECHANICAL ADJUSTMENTS ...................... 9

4. ELECTRICAL ADJUSTMENTS

Tape Section .................................................................... 9

Tuner Section .................................................................. 10

5. DIAGRAMS

5-1. IC Pin Function Description ........................................... 12

5-2. Block Diagram ................................................................ 13

5-3. Printed Wiring Board ...................................................... 15

5-4. Schematic Diagram ......................................................... 19

6. EXPLODED VIEWS................................................ 24

7. ELECTRICAL PARTS LIST ............................... 27

HOWTO CHANGETHE CERAMIC FILTERS

This model is used two ceramic filters of CF2 and X2.

You must used same type of color marked ceramic filters in order

to meet same specifications.

Therefore, the ceramic filter must changed two pieces together

since it's supply two pieces in one package as a spare parts.

Mark Center frequency

red 10.70MHz

blue 10.67MHz

orange 10.73MHz

black 10.64MHz

white 10.76MHz

mark CF2

Flexible Circuit Board Repairing

•Keep the temperature of the soldering iron around 270 ˚C dur-

ing repairing.

•Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

•Be careful not to apply force on the conductor when soldering

or unsoldering

Notes on chip component replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

SERVICING NOTES

– 3 –

SECTION 1

GENERAL This section is extracted from

instruction manual.

– 4 –

– 5 –

– 6 –

Note: Follow the disassembly procedure in the numerical order given.

SECTION 2

DISASSEMBLY

CABINET (FRONT) ASS’Y

• This set can be disassembled in the order shown below.

Insert the precision screwdriver

(1.4 mm flat-blade) in to the slit

at claw

and release the claw.

Remove the cabinet (front) ass’y.

(Release all claw

alphabetical order.)

Note: On installation cabinet (front) ass’y

adjust the S306 and joint (MB).

CABINET (FRONT) ASS’Y

(Page 6)

CASSETTE HOLDER

(Page 7)

MAIN BOARD

(Page 7) MECHANISM DECK

(MF-WMFX251-114)

(Page 8)

BELT,

MOTOR (REEL/CAPSTAN)

(M901)

(Page 8)

SET

Joint (MB)

S306

Cabinet (front) ass’y

cassette holder

cabinet (front) ass’y

– 7 –

MAIN BOARD

CASSETTE HOLDER

Insert a precision screwdriver

(1.4 mm flat-blade) vertically

in to portion

to release the

hinge plate.

Portion

to release the

hinge plate.

screw (M1.4)

MAIN board

two claws

flexible board

(CN301)

Removal the

four solders.

center cabinet

torsion sprin

Open the cassette holder.

cassette holder

– 8 –

MECHANISM DECK (MF-WMFX251-114)

BELT, MOTOR (REEL /CAPSTAN) (M901)

Insert the precision screwdriver

(1.4 mm flat-blade) in the slit

and relese two claws.

Remove the mechanism deck

(MF-WMFX251-114) in the

direction of the arrow

two screws

(M1.4

1.6)

motor (reel/capstan)

(M901)

belt

– 9 –

SECTION 3

MECHANICAL ADJUSTMENTS SECTION 4

ELECTRICAL ADJUSTMENTS

Precaution

1. Clean the following parts with a denatured-alcoholmoistened

swab: playback head pinch roller

capstan rubber belt

2. Demagnetize the playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the rated power

supply voltage (2.5V) unless otherwise noted.

Torque Measurement

Mode Torque Meter Meter Reading

FWD 20 – 42 g•cm

CQ-102C (0.28 – 0.58 oz•inch)

FWD less than 2 g•cm

Back Tension (less than 0.03 oz•inch)

FF, REW CQ-201B more than 60 g•cm

(more than 0.83 oz•inch)

Precaution

• Supplied voltage: 2.5 V

• Switch and control position

TAPE switch: NORM

RADIO switch : ST (AEP and French models)

:DX (US and E models)

VOLUME CONTROL: maximum

AVLS switch: NORM

MEGA BASS switch: OFF

Test tape

Tape Speed Adjustment

Procedure:

Type Signal Used for

WS-48A 3 kHz, 0 dB Tape Speed Adjustment

TAPE SECTION

–

test tape

WS-48A

(3 kHz, 0dB) frequency counter

set

jack

Ω

Playback WS-48A (tape center part) and adjust RV601 so that the

frequency counter reading becomes 2,985 to 3,015 Hz.

Adjustment Location:

RV601

0 dB=0.775 V

– 10 –

TUNER SECTION

FM SECTION

Setting:

RADIO ON/OFF switch: ON

BAND switch: FM

FMTuning Voltage Adjustment

FMTracking Adjustment

FM TUNING VOLTAGE ADJUSTMENT

Adjust for a 9.0 Vdc reading on digital voltmeter

108 MHz

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

87.5 MHz

AM SECTION

Setting:

RADIO ON/OFF switch: ON

BAND switch: AM

AMTuning Voltage Adjustment

AM TUNING VOLTAGE ADJUSTMENT

Adjust for a 1.0 Vdc reading on digital voltmeter

530 (531) kHz

( ): Except US model

AM IF Adjustment, AM Tracking Adjustment

* Repeat the procedures in each adjustment several times, and the

tracking adjustment should be finally done by the trimmer ca-

pacitors.

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter

1000 (999) kHz

( ): Except US model

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L1 (BAR ANTENNA) CT1

620 (621) kHz 1400 (1395) kHz

( ): Except US model

Modulation: 1 kHz, 75 kHz dev. (100%)

Output level: as low possible.

+0.5

–0

digital voltmete

–







MAIN board

(VT)

(GND)

FM RF

signal generator

0.01











MAIN board

(FM RF IN)

(GND)

jack

Ω

set +

level meter

(AC: 0.5 – 5 V range)

–

digital voltmete

–







MAIN board

(VT)

(GND)

AM RF Signal generator Put the lead-wire

antenna close to

the set.

Modulation: 400 Hz, 30%

Output level: as low possible.

jack

Ω

set +

level meter

(AC: 0.5 – 5 V range)

–

0 dB=1 µV

+ 0.1

–0

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