Sony WM-FX822 Service manual

WM-FX822

SERVICE MANUAL

Ver 1.1 2002. 01

SPECIFICATIONS

Radio section

Frequency range

Tape player section and general

Frequency response

Output

Power output

Power requirements

Battery life (Approx. hours)

Rechargeable NC-6WM fully charged Playback 5 Radio/TV reception 7.5

Sony alkaline LR6 (WM) Playback 16 Radio/TV reception 24

FM (stereo) : 76.0 - 90 MHz AM (mono) : 531 - 1,710 kHz TV (mono): 1 -12 ch

(a NR off) 20 - 18,000 Hz (EIAJ*) Headphones (2/REMOTE jack) load impedance 8 - 300 Ω 4 mW + 4 mW (EIAJ, 16 Ω) DC1.5V Rechargeable battery (NC-6WM) One R6 (size AA) battery

Tourist Model

Model Name Using Similar Mechanism WM-EX510

Tape Transport Mechanism Type MT-WMEX510-112

Dimensions

Mass

Design and specifications subject to change without notice.

Using AC power

Remove the rechargeable battery if inserted and attach the battery case and connect the AC power adaptor (AC-E15L or ACE15HG) not supplied) to the DC IN 1.5V of the battery case and to the wall outlet. Do not use any other AC power adaptor.

Dolby noise reduction manufactured under licence from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol 8 are trademarks of Dolby Laboratories Licensing Corporation.

Approx. 108.5 x 78.6 x 23.0 mm (w/h/d) incl. projecting parts and controls (EIAJ) Main unit Approx. 145 g For use Appox. 240 g (incl. Stereo earphone with remote controller, rechargeable battery NC-6WM, tape C60HF)

Polarity of the plug

Sony R6P (SR) Playback 3.5 Radio/TV reception 7

9-960-416-12

2002A1600-1

Sony Corporation

Personal Audio Company

Published by Sony Engineering Corporation

*(EIAJ) Electric Industries Association of Japan

— Continued on next page —

RADIO CASSETTE PLAYER

— 1 —

Receiving Stations Outside Japan

1 Press BAND•RADIO ON to turn on the radio. 2 Press ENTER. The frequency digits, “PRESET” and a preset

number flash in the display.

3 Press BAND•RADIO ON for more than 2 seconds. “AREA

1” flashes in the display.

4 While “AREA 1” is flashing, press PRESET+/– repeatedly to

select either area “USA” (USA and Canada) or “Eur” (Europe and other countries) and then press ENTER.

5 Press ASP to store the radio stations (both AM and FM)

automatically. The Walkman starts searching and storing stations.

6 Press BAND•RADIO ON to select the desired band and

press PRESET+/– to select a station.

TABLE OF CONTENTS

Section Title Page

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

SECTION 2. SERVICE NOTE ................................. 4

SECTION 3. DISASSEMBLY

3-1. Bracket assembly and Cassette Holder assembly .............. 6

3-2. Audio Board ....................................................................... 6

3-3. Tuner Board ....................................................................... 7

SECTION 4. ADJUSTMENTS

4-1. Mechanical Adjustments .................................................... 8

4-2. Electrical adjustments ........................................................ 8

SECTION 5. DIAGRAMS

5-1. Printed Wiring Board — Tuner Section —.....................11

5-2. Schematic Diagram — Tuner Section —........................ 13

5-3. Schematic Diagram — Audio Section — ....................... 17

5-4. Printed Wiring Board — Audio Section — .................... 21

5-5. IC Pin Functions

IC701 MSM63120B System Control .............................. 25

IC702 SMC62L3A LCD Driver ...................................... 26

SECTION 6. EXPLODED VIEWS

6-1. Case and Tuner Board Section ........................................ 28

6-2. Audio Board Section........................................................ 29

6-3. Mechanism Section (WM-EX510-112) ........................... 30

SECTION 7. ELECTRICAL PARTS LIST ............. 31

Notes on chip component replacement

• Never reuse a disconnected chip component.

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

damaged by heat.

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.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! 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

PUBLISHED BY SONY.

— 2 —

SECTION 1

GENERAL

PARTS IDENTIFICATION

Tape Player and General section Radio section

This section is extracted from instruction manual.

1 2 3

4 5 6 7

8 9 0

!¡

!™

2 !£

5 0

1 OPEN knob 2 Display window 3 Terminal for a dry battery case 4 Battery compartment lid

(for the rechargeable battery)

5 Tape operation buttons 6 MENU (function select) botton 7 SET (function change) botton 8 BATT (battery) indicator 9 Main unit : VOLUME knob

Remote controller : VOL knob

0 Main unit : Hold cover

Remote controller : HOLD switch

!¡ 2 REMOTE (Headphone with remote control unit)

jack

!™ Micro plug !£ DBB (dynamic bass boost)/ALARM botton

1 ENTTER (input) button 2 PRESET +, – button 3 ASP (Automatic Station Preset) button 4 TUNE (tuning) +/– switch 5 p • RADIO OFF (stop/radio off) button 6 BAND (FM/AM/TV band select) • RADIO ON

button

Accessories supplied

• Battery charger • Rechageable battery • Battery case • Sony alkaline battery AM3 (SR)

• Stereo earphone • Ear adaptors(2) • Carrying case • Clip

(with Remote Controller) (If the earphones do not fit your

• Plug adaptor

• Instruction manual

• Leaf lets

• Warranty card

NC-6WM

ears, attach the ear adaptors.)

— 3 —

SECTION 2

SERVICE NOTE

[Service Mode]

Mode which enables the mechanism to be operated with the MAIN board opened.

1. Setting

1) Refer to “Disassembly” and remove the cabinet and open the MAIN board.

2) Connect the MAIN board to the motor and plunger using a jumper wire. Use “Extension tool (1-769-143-11) (one set 10 tools)” to make connection simple.

3) Short-circuit theTP52 and GND by soldering.

4) Turn OFF the BL SKIP switch.

5) Apply a square wave signal or a sine wave signal to TP52. (see the right figure)

6) Supply 1.3V to the battery terminals (+) and (–) using a stabilized power supply.

2. Preset State This state must be set to set the PLAY, FF, and REW modes.

1) Check that the lever (NR SW) is at the center and F/R switch (S701) is at the center. If not, set the preset state as follows.

2) Move the N/R switch (S701) according to the side faced by the lever (NR SW).

3) Turn OFF the stabilized power supply switch once and then turn it ON again so that the lever (NR SW) can be moved. Move the N/R switch (S701) according to this timing and set to the center.

3. FF REW Mode

1) Check the “2. Preset State” and press the FF switch and REW switch.

[MAIN Board]

PLUNGER

— Side A — — Side B —

TP50

IC702

BATT

REW

S701

50KΩ

TP52

PH701

AF oscillator

–

ND701

SQUARE WAVE (SINE WAVE) 10Hz, –3.5dB

MOTOR

BATT

4. PLAY Mode

1) Check the “2. Preset State”.

2) Press the œ switch. The lever (NR SW) will move to the F side once and then to the R side. Move the N/R switch (S701) according to this timing to set the PLAY (R side) mode. Press the œ switch another time and move the N/R switch (S701) according to the movement of the lever (NR SW) to set the PLAY (N side) mode.

Note 1: If the above cannot be performed, start again from preset. Note 2: Use the remote control œ, p , FF, and REW switches as

much as possible. If the remote control is not available, do not touch switch with the hand and use something with a round tip to press them.

Note 3: By using a headphone, the timing for moving S701 can be

known by the beep.

N SIDE R SIDE

[Lever (NR SW)]

CENTER

R side

Lever (NR SW)

Center

F side

— 4 —

[Rotation system]

Rotation system during PLAY.

Reel table (T side)

Gear (A)

Gear (K)

Capstan wheel (N) assembly

Clutch assembly

Gear (B)

Gear (C)

Gear (NR) (REW : Left side/ FWD : Right side)

Capstan wheel (R) assembly

Reel table (S side)

Motor pully

Pulley (REVERSE)

Rotation system during REW.

Gear (B)

Reel table (T side)

Gear (K)

Capstan wheel (N) assembly

Gear (FR) (REW : Left side)

Gear (NR)

Gear (A)

Capstan wheel (R) assembly

Motor pully

Clutch assembly

Pulley (REVERSE)

Rotation system during FF.

Gear (FR)

Clutch assembly

Gear (K)

Capstan wheel (N) assembly

(FF : Right side)

Gear (NR)

Reel table (S side)

Gear (C)

Capstan wheel (R) assembly

Motor pully

Pulley (REVERSE)

— 5 —

SECTION 3

DISASSEMBLY

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

3-1. BRACKET ASSEMBLY AND CASSETTE HOLDER ASSEMBLY

Screw (M1.4)

Bracket assembly

Screw (M1.4)

Lever (B), Lock

Cassette holder assembly

3-2. AUDIO BOARD

Remove the solder of the plunger solenoid.

Flexible board

(Head)

Screw (M1.4x2.0)

Remove the solder of the switch (S901).

Remove the solder of the flexible board.

Screw (M1.4)

Remove the Audio board

direction of arrow.

Remove the solder of the motor.

Remove the solder of the battery terminal.

S701

Lever (NR SW)

Note: Confirm if the switch lever

installs itself in the groove of a lever (NR SW) for assembling.

— 6 —

3-3. TUNER BOARD

Remove the solder of the flexible board.

TU cover

Tuner board

Screw (M1.7x2.5)

— 7 —

SECTION 4

ADJUSTMENTS

4-1. MECHANICAL ADJUSTMENTS PRECAUTION

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

playback head rubber belts capstan pinch roller

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 (1.3V) unless otherwise noted.

Torque Measurement

Mode Torque Meter

FWD FWD

Back Tension

REV REV

Back Tension

REW

CQ-102C

CQ-102RC

CQ-201B

Meter Reading

18 — 33 g • cm

0.5 — 3 g • cm

18 — 33 g • cm

0.5 — 3 g • cm

more than 60 g • cm

4-2. ELECTRICAL ADJUSTMENTS

TAPE SECTION

PRECAUTION

1. Power supply voltage : 1.3V.

2. Switch position DOLBY NR switch : OFF EX DBB switch : NORM

Test Tape

Type

WS-48A

Signal

3 kHz, 0 dB

TAPE SPEED ADJUSTMENT

Procedure :

Test Tape WS-48A (3kHz, 0dB)

set

REMOTE jack

1. Play back WS-48A (tape center portion) in FWD mode. Adjust the RV601 so that the frequency counter reads 3,000 ± 30 Hz.

2. Play back WS-48A (tape center portion) in REV mode. Confirm that the reading of frequency counter is within 2.5% from the reading in step 1.

Used for

Tape Speed Adjustment

frequency counter

+ –

Adjustment Part Location Diagram :

[MAIN BOARD] (SIDE A)

ND701

RV601

— 8 —

TUNER SECTION

FM SECTION

Setting:

FUNCTION switch : RADIO BAND switch : FM

FM RF SSG

0.01µF TP (ANT)

TP (GND)

Modulation : 400 Hz, 22.5 kHz dev. (30%) Output level: as low as possible.

FM IF ADJUSTMENT

Adjust for a maximum reading on VTVM.

L5 76.00 MHz

VTVM

(AC : 0.5–5V range)

set

REMOTE jack

VCO ADJUSTMENT

FM RF SSG

0.01µF

Carrier frequency : 78.00 MHz Modulation : no-modulation Output level : 55 dB (562 µV)

[TUNER BOARD]

Adjustment

Element

RV1

Frequency

Display

78.00 MHz 19.00 kHz ± 0.05 kHz

IC3

(VCO)

TP (ANT)

TP (GND)

Frequency counter

Reading

150kΩ

frequency counter

+ –

— 9 —

+ 19 hidden pages