SONY WMEX9 - Service Manual Immediate Download

Model Name Using Similar Mechanism

NEW

Tape Transport Mechanism Type

MF-WMEX9-162

SERVICE MANUAL

Tourist Model

WM-EX9

CASSETTE PLAYER

System

Compact cassette stereo

Frequency response (Dolby NR off)

Playback: 30 - 18,000 Hz

Output

Headphones

2 jack

Load impedance 8 - 300 ohms

Maximum output level

4 mW + 4 mW (32

)

Power requirements

DC 1.5 V

Nickel metal hydride rechargeable

battery NH-14WM (N) (supplied)

One R6 (size AA) batteries

(negative ground)

Battery life (Approx. hours)

Rechargeable NH-14WM

fully charged

Sony alkaline LR6 (WM)

Rechargeable NH-14WM

100

Sony alkaline LR6 (WM)

used together

Dimensions (w/h/d)

Approx. 77.7

× 108 × 19.6 mm

projecting parts and controls

Mass

Approx. 140 g / Approx. 205 g

incl. Nickel metal hydride rechargeable

battery NH-14WM (N) and a cassette

Supplied accessories

Battery charger BC-7HT (1)

Rechargeable battery NH-14WM (1)

Rechargeable battery case (1)

Dry battery case (1)

Stereo headphones with remote control

MDR-ED132SP + RM-WME21L (1)

Carrying pouch (1)

AC plug adaptor (1)

Design and specifications are subject to change without notice.

SPECIFICATIONS

Dolby noise reduction manufactured under license from Dolby Labo-

ratories Licensing Corporation.

"DOLBY" and the double-D symbol

a are trademarks of Dolby

Laboratories Licensing Corporation.

MICROFILM

Photo: Gold type

Ver 1.0 1998. 10

TABLE OF CONTENTS

1. SERVICING NOTE

1-1. Service Mode ...................................................................... 3

1-2. Rotational System ............................................................... 4

2. GENERAL

Location of controls ................................................................. 5

3. DISASSEMBLY

3-1. Cassette Lid Assy ................................................................ 6

3-2. Case ..................................................................................... 6

3-3. Ornament (OPEN) Block Assy ........................................... 7

3-4. SUB Board, LEAF Switch, MAIN Board ........................... 7

3-5. Belt (F1), Motor (F1) (M701) ............................................. 8

4. MECHANICAL ADJUSTMENTS .............................. 9

5. ELECTRICAL ADJUSTMENTS ............................... 9

6. DIAGRAMS

6-1. Block Diagram .................................................................. 10

6-2. Printed Wiring Boards ....................................................... 12

6-3. Schematic Diagram ........................................................... 15

6-4. Pin Description .................................................................. 18

7. EXPLODED VIEWS

7-1. Case Section ...................................................................... 21

7-2. Mechanism Deck Section .................................................. 22

8. ELECTRICAL PARTS LIST ..................................... 23

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.

F side

flywheel

slider (NR)

F side

center

R side

SECTION 1

SERVICING NOTE

1-1. SERVICE MODE

Mode to allow the mechanical parts to operate with the audio board

open.

This set uses the photo reflector PH701 to detect the rotation of the

idler gear (A) (S side). PH701 is on the main board and so removal

of the main board does not allow the set to detect the rotation of the

idler gear (A) (S side). This makes motor control impossible which

prevents normal operation.

When repairing the set as energized with the main board removed,

proceed as follows:

1. Setting

1) Remove the case (refer to the Disassembly) and open the main

board.

2) Connect the motor and plunger to the main board with jumper

wire.

The extension jig (1-769-143-11) (one set of ten wires) can be

used for easy connection.

3) Short the TAPE IN switch land (BP701) with solder. Input a

square (or sine) wave of 10 to 100 Hz (at 1.3 V) to both PH IN T

land (TP60) and PH IN S land (TP61) with jumper wire.

4) Supply 1.3 V to the positive and negative terminals of the

battery with a stabilized power supply.

2. Preset state

The set must be in this state before the PLAY, FF and REW modes

can be entered.

1) Make sure that the slider (NR) is in the center position and that

the N/R switch (S701) is in the center position. Make sure that

the reel gear does not rotate by rotating the flywheel on the F

side clockwise. If improper, place the set in the preset state

according to the following instructions:

2) Repeat the step below some times to ensure the above

conditions.

* Pull away the trigger level from the plunger with twezers or other

means. Then rotate the flywheel on the F side clockwise.

3) Turn the stabilized power supply OFF once and then ON.

3. FF/REW mode

1) Check for "2. Preset state" and push the FF switch and the REW

switch.

2) Move the N/R switch (S701) to the movement of the slider to

enter the FF/REW mode.

4. PLAY mode

1) Check for "2. Preset state."

2) Push the

" " switch on the remote commander to move the

lever (SW) toward the R side. With timing to this, move the

N/R switch (S701) to enter the PLAY (R side) mode.

Note 1: If failed, retry from the preset state.

Note 2: The

" ", p, FF and REW switches on the remote

commander should be used whenever possible.

main board (side A)

main board (side B)

mechanism deck

BP701

PH IN T

PH IN S

S701

IC601

IC701

F side

center

R side

1-2. ROTATIONAL SYSTEM

1. Rotational System of PLAY Mode

2. Rotational System of FF Mode

3. Rotational System of REW Mode

motor pulley

gear (FR)

gear (reel) (S side)

reverse pulley

insert flywheel (R)

insert flywheel (N)

idler gear (A) (S side)

gear (Y)

clutch

assy (F)

motor pulley

reverse pulley

insert flywheel (R)

insert flywheel (N)

gear (reel) (T side)

gear (reel) (S side)

idler gear (A) (T side)

idler gear (A) (S side)

idler gear (B)

gear (Y)

gear (NR)

FWD REV

clutch

assy (F)

motor pulley

gear (FR)

reverse pulley

insert flywheel (R)

insert flywheel (N)

gear (reel) (T side)

idler gear (A) (T side)

gear (Y)

clutch

assy (F)

SECTION 2

GENERAL

· Main unit

Location of controls

· Stereo headphones with remote control

L (left)

R (right)

1 VOL (volume) knob

2 2 REMOTE (headphone · remote control) jack

3 Operation button

4 OPEN/HOLD/OPERATION switch

5 Dry battery case contact

6 Rechargeable battery compartment

7 HOLD switch

8 Liquid crystal display window

9 Stereo mini-plug

!º MENU button

!¡ Jog lever

!TM Clip