SONY WMEX500 - Service Manual Immediate Download

MICROFILM

SERVICE MANUAL

CASSETTE PLAYER

AEP Model

WM-EX500/EX505

E Model

WM-EX505

Model Name Using Similar Mechanism

NEW

Tape Transport Mechanism Type

MT-WMEX505-162

SPECIFICATIONS

WM-EX500/EX505

Dolby noise reduction manufactured under license

from Dolby Laboratories Licensing Corporation.

"DOLBY" and the double-D symbol ; are trade-

marks of Dolby Laboratories Licensing Corporation.

Photo: WM-EX505

· Frequency response (Dolby NR off (WM-EX505))

Playback: 30 - 18,000 Hz

· Output

Headphones (i jack)

Load impedance 8 - 300 ohms

· Power requirements

1.5 V

One R6 (size AA) battery

· Dimensions (w/h/d)

Approx. 78.7 x 109.7 x 28.1 mm, incl. projecting parts and

controls

· Mass

Approx. 145 g

Approx. 200 g (incl. a battery and a cassette)

· Supplied accessories

Stereo headphones or earphones with remote control (1)

(WM-EX505)

Stereo headphones or earphones (1) (WM-EX500)

Design and specifications are subject to change without notice.

Battery life (Approx. hours)

(EIAJ*)

Sony alkaline LR6 (SG)

Tape playback

* 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.

Ver 1.0 2000. 01

TABLE OF CONTENTS

SERVICING NOTES ............................................... 3

GENERAL ................................................................... 5

DISASSEMBLY ......................................................... 6

MECHANICAL ADJUSTMENTS ....................... 12

ELECTRICAL ADJUSTMENTS ......................... 12

DIAGRAMS

6-1. Block Diagram ................................................................ 13

6-2. Printed Wiring Board ...................................................... 15

6-3. Schematic Diagram ......................................................... 17

6-4. IC Pin Function Description ........................................... 22

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

ELECTRICAL PARTS LIST ............................... 26

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.

SECTION 1

SERVICING NOTES

This set detects the rotation of the idler gear (A) (side S) using the

PH701 (photo reflector). The PH701 is mounted on the MAIN

board, therefore the idler gear (A) (side S) cannot be detected with

the MAIN board removed. As a result, the motor (M901) cannot

be controlled, causing malfunction.

Further, the DIRECTION switch (S701) is also mounted on the

MAIN board, and with the board removed, the mechanism posi-

tion cannot be detected and the operation is not changed over.

Therefor, when the voltage check is executed with the MAIN board

removed, follow the procedure provided below.

1. Setting

(1)

Refer to "3. DISASSEMBLY", and remove the MAIN board.

(2)

Connect the MAIN board to the motor (M901) and the

plunger (PM901) using jumper wires. These can be connected

easily with the use of the extension tool (Part No. 1-769-

143-11) (ten in one set).

(3)

Short the TAPE DETECT switch (S901-1) terminals and the

ATS switch (S901-2) terminals.

(4)

Connect the AF oscillator to the TP36 (PHOTO IN) and the

TP46 (GND).

(5)

Supply 1.3 V to the battery terminals using the regulated

power supply.

2. Preset state

To set the PLAY, FF, REW modes, the preset state must be set.

(1)

Check that the slider (NR) and the DIRECTION switch

(S701) are set to the center position. If not, set the preset

state as follow.

(2)

Move the DIRECTION switch (S701) to the side, which the

slider (NR) is facing.

(3)

The slider (NR) will move when the regulated power supply

switch is set to OFF once and then set to ON. Move the DI-

RECTION switch (S701) according to this timing and set to

the center position.

3. FF, REW modes

(1)

Check that the preset state is set.

(2)

Input the square wave or sine wave to the TP36 (PHOTO IN)

and the TP46 (GND).

(3)

Press the x button (S702) to set the STOP mode.

(4)

Press the [FF AMS] button (S704) or the [REW AMS] but-

ton (S705).

4. PLAY mode

(1)

Check that the preset state is set.

(2)

Input the square wave or sine wave to the TP36 (PHOTO IN)

and the TP46 (GND).

(3)

Press the x button (S702) to set the STOP mode.

(4)

Press the [

REPEAT] button (S703) will move the

slider (NR) once towards the side R and then to the side F.

Move the DIRECTION switch (S701) according to this

timing will set the PLAY mode (side F). Press the

[

REPEAT] button (S703) another time and move the

DIRECTION switch (S701) according to the movement of

the slider (NR) will set the PLAY (R mode).

Note 1: If the above fails, perform from preset again.

Note 2: Use the [

REPEAT] (S703), x (S702), [FF AMS]

(S704), and [REW AMS] (S705) buttons on the remote control-

ler as much as possible. If no remote controller, do not touch the

buttons with your hands, but using a stick with a round tip.

Note 3: When using headphones, the timing for move the DIRECTION

switch (S701) can be determined from the beep sound.

n N

square wave

(sine wave)

10 Hz, 3.5 dB

MAIN Board (Side B)

TAPE DETECT

switch

(S901-1)

ATS switch

(S901-2)

connect to the plunger

(PM901)

battery

terminal 3

battery

terminal #

connect to the

motor (M901)

PH701

SOUND

(S706)

S701

DIRECTION

FWDTCENTERtREV

TP46

(GND)

FUNCTION

(S708)

(S702)

TP36

(PHOTO IN)

REW AMS

(S705)

YREPEAT

(S703)

FF AMS

(S704)

AF oscillator

n N

SLIDER (NRA)

Rotation system

Rotation system during PLAY

Rotation system during FF

Rotation system during REW

slider (NRA)

side F side R

center

insert flywheel (N) insert flywheel (R)

reverse pulley

clutch assy (F)

gear (Y)

cam gear

gear (REEL)

(T side)

motor pulley

idler (A) gear (T side)

gear (FR)

(FF: left side)

insert flywheel (N)

insert flywheel (R)

reverse pulley

clutch assy (F)

gear (Y)

cam gear

gear (REEL) (T side)

motor pulley

idler (A) gear (T side)

gear (NR)

(FWD: left side

REW: right side)

idler (B) gear

idler (A) gear (S side)

gear (REEL) (S side)

insert flywheel (N)

insert flywheel (R)

reverse pulley

clutch assy (F)

gear (Y)

cam gear

motor pulley

gear (FR)

(REW: right side)

idler (A) gear (S side)

gear (REEL) (S side)

SECTION 2

GENERAL

This section is extracted from

instruction manual.

OPEN

·REPEAT

REW(AMS·AVLS)

FUNCTION

SOUND

VOL

HOLD

FF (AMS·

BL SKIP/s)

BATT

VOL

REW

·x

·REPEAT

·;NR

FF (AMS·

BL SKIP/s)

REW (AMS·AVLS)

FUNCTION

SOUND

VOL

HOLD

Plug in firmly.

Branchez fermement.

(WM-EX500)

(WM-EX505)