Sony Walkman WM-FX193 User manual

Ver 1.0 2000.01

MICROFILM

WM-FX193/FX195

RADIO CASSETTE PLAYER

SPECIFICATIONS

US Model

WM-FX193

Canadian Model

AEP Model

E Model

Chinese Model

WM-FX193/FX195

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type MF-WMFX195-114

Photo :WM-FX195

• Frequency range

FM: 87.5 - 108 MHz (Italy, Saudi Arabia)

87.6 - 107.9 MHz (Other countries)

AM: 526.5 - 1606.5 kHz (Italy, SaudiArabia))

531 - 1602 kHz (Other countries)

• Power requirement

3 V DC batteries R6 (AA) x 2

• Dimensions

89.1 x 117.7 x 35.5 mm (w/h/d) incl. projecting parts and

controls

• Mass

Approx. 140 g/Approx. 220 g incl. batteries and a cassette

• Supplied accessories

Stereo headphones or Stereo earphones (1)/Belt clip (1)

Design and specifications are subject to change without notice.

Battery life (approximate hours) (EIAJ*)

Sony alkaline LR6 (SG) Sony R6P (SR)

playback 25 7.5

radio 55 18

* Measured value by the standard of EIAJ (Electronic

Industries Association of Japan). (Using a Sony HF series

cassette tape)

Note

• The battery life may shorten depending on the operation of

the unit.

SERVICE MANUAL

– 2 –

Specifications ........................................................................... 1

1. GENERAL

Location and Function of Controls .................................... 2

2. DISASSEMBLY

2-1. Cabinet (Rear) Sub ASSY .......................................... 3

2-2. Main Board ................................................................. 3

2-3. Mechanism Deck ........................................................ 4

2-4. Belt, Capstan/Reel Motor (M901) .............................. 4

2-5. Holder Sub ASSY, Cassette ........................................ 5

3. ADJUSTMENTS

3-1. Mechanical Adjustments............................................. 6

3-2. Electrical Adjustments ................................................ 6

4. DIAGRAMS

4-1. Block Diagram............................................................ 9

4-2. Printed Wiring Boards ...............................................11

4-3. Schematic Diagram................................................... 13

5. EXPLODED VIEWS

5-1. Cabinet Section......................................................... 17

5-2. Mechanism Section -1 .............................................. 19

5-3. Mechanism Section -2 .............................................. 20

6. ELECTRICAL PARTS LIST................................... 21

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270°C during

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.

TABLE OF CONTENTS

SECTION 1

GENERAL

nPLAY

MEGA BASS/

OFF (FX195 only)

FM/AM/TAPE

(RADIO OFF)

VOLUME

TUNING

FM MODE

AVLS NORM/

LIMIT BATT

LOCATION AND FUNCTION OF CONTROLS

This section is extracted from

instruction manual.

– 3 –

SECTION 2

DISASSEMBLY

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

2-1. CABINET (REAR) SUB ASSY

2-2. MAIN BOARD

zThe equipment can be removed using the following procedure.

Main boardCabinet (rear) sub ASSY

Holder sub ASSY, Cassette

Mechanism deck Belt, Capstan/reel moter (M901)

Set

Screws B1.7x9

Claws

Claws Holder sub ASSY, Cassette

Cabinet (front)

Cabinet (rear) sub ASSY

Claws

Claw

Claws

Claw

Screw WH1.4

Claws

Remove solder

Head flexible board

Red

White

Orange Black

Cabinet (front)

Main board

– 4 –

2-3. MECHANISM DECK

2-4. BELT, CAPSTAN/REEL MOTOR (M901)

Mechanism dec

Insert the precision screwdriver

(1.4 mm flat-blabe) in to the slit

and release two claws.

Cabinet (front)

Mechanism dec

Screws (M1.4)

Capstan/reel motor (M901)

Belt

– 5 –

Move it away from projection

Holder sub ASSY, Cassette

Holder sub ASSY, Cassett

Holder sub ASSY, Cassette

Cabinet (front)

Move it away

from projection

Spring (torsion)

Holder sub ASSY, Cassette

Cabinet (front)

Spring (torsion)

Hinge

Dial indicator

2-5. HOLDER SUB ASSY, CASSETTE

zCAUTIONS DURING ASSEMBLY

1Insert the dial indicator to the square hole of the cabinet

(front) and align to the pointer.

2Insert the spring (torsion) in to the L shape slot as shown in

the figure.

3, 4Insert the hinge of the “Holder subASSY, Cassette”.

5Close the “Holder sub ASSY, Cassette” then press in.

– 6 –

3-1. MECHANICAL ADJUSTMENTS

PRECAUTION

1. Clean the following parts with a denatured-alcohol-moistened

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. These measurement and adjustment should be performed with

the rated power supply voltage (2.5 V) unless otherwise noted.

Torque Measurement

Mode Torque Meter Meter Reading

FWD 20 – 30 g • cm

CQ-102C (0.28 – 0.41 oz• inch)

FWD 0.4 – 2 g • cm

back tension (0.006 – 0.027 oz• inch)

FF, REW CQ-201B more than 40 g • cm

(more than 0.56 oz• inch)

SECTION 3

ADJUSTMENTS

3-2. ELECTRICAL ADJUSTMENTS

PRECAUTION

• Supplied voltage : 2.5V.

• Switch and control position

MEGA BASS switch : OFF (FX195)

VOLUME control : maximum

AVLS switch : NORM

TestTape

Type Signal Used for

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

Tape Speed Adjustment

Procedure :

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

the frequency counter reading becomes 3,000Hz.

Standard value : 2,985–3,015Hz

2. Playback WS-48A (tape top and end).

Check that frequency counter reading is within 1.5% of the read-

ing of step 1.

*1 FX193 E, Chines, Saudi Arabia,

16ΩFX195 E, Chines, Saudi Arabia, AEP, French, Italian,

CEV

32ΩFX193 US, Canadian,AEP, French, Italian, CEV

FX195 Canadian

• Abbreviation

CEV : Ukraine, Hungary, Czech

Adjustment Location :

set

test tape

WS-48A

(3kHz, 0dB) frequency counte

phones jack (J302)

[MAIN BOARD] (Conductor side)

RV601 :Tape Speed Adjustmen

– 7 –

TUNER SECTION

AM Section

BAND : AM

FM Section

BAND : FM

*1 FX193 E, Chines, Saudi Arabia,

16ΩFX195 E, Chines, Saudi Arabia, AEP, French, Italian,

CEV

32ΩFX193 US, Canadian, AEP, French, Italian, CEV

FX195 Canadian

• Abbreviation

CND : Canadian

E5, E6 : South America

CEV : Ukraine, Hungary, Czech

AM RF signal

generator

30% amplitude modulation by 400Hz

signal.

Output level : as low as possible

Put the lead-wire

antenna close to

the set.

set

phones jack (J302)

level mete

< > : US, Canadian, E5, E6 model

[ ] : Italian, Saudi Arabia model

AM IF ADJUSTMENT