Sony WM-EX9 Service Manual

WM-EX9

SERVICE MANUAL

Ver 1.1 1999. 01

Photo: Gold type

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

SPECIFICATIONS

US Model

AEP Model

UK Model

E Model

Tourist Model

Model Name Using Similar Mechanism NEW Tape Transport Mechanism Type MF-WMEX9-162

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 Ω) Power requirements DC 1.5 V

Nickel metal hydride rechargeable battery (supplied) One R6 (size AA) batteries

(negative ground) Battery life (Approx. hours) Rechargeable NH-14WM 40 fully charged Rechargeable NC-6WM 18 fully charged Sony alkaline LR6 (WM) 60 Rechargeable NH-14WM 100 Sony alkaline LR6 (WM) used together Rechargeable NC-6WM 78 Sony alkaline LR6 (WM) used together Dimensions (w/h/d) Approx. 77.7 × 108 × 19.6 mm

(3 1/8 × 4 3/8 × 25/32 in.)

projecting parts and controls Mass Approx. 140 g / Approx. 205 g

(5.0 oz/ 7.3 oz)

incl. rechargeable battery

and a cassette

Supplied accessories Battery charger BC-7DC (1)

(US model) Battery charger BC-7DY (1) (AEP, French model) Battery charger BC-7HT (1) (E, Tourist model) Battery charger BC-7S (1) (UK model) Battery charger BC-9HR (1) (Korea model) Rechargeable battery NH-14WM (1) (E, Tourist, Korea model) Rechargeable battery NC-6WM (1) (Except E, Tourist, Korea model) 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) (E, Tourist model)

Design and specifications are subject to change without notice.

MICROFILM

CASSETTE PLAYER

– 1 –

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. IC Pin Description............................................................. 10

6-2. Block Diagram .................................................................. 11

6-3. Printed Wiring Boards (Board suffix No. : -11)................ 13

6-4. Printed Wiring Boards (Board suffix No. : -12)................ 16

6-5. Schematic Diagram ........................................................... 19

7. EXPLODED VIEWS

7-1. Case Section ...................................................................... 24

7-2. Mechanism Deck Section.................................................. 25

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

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.

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 P AR TS WHOSE P ART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 2 –

F side flywheel

slider (NR)

F side

center

R side

SECTION 1

BP701

PH IN T

PH IN S

S701

IC601

IC701

F side

center

R side

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 fr om 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.

– main board (side A) –

– main board (side B) –

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.

– mechanism deck –

– 3 –

1-2. ROTATIONAL SYSTEM

1. Rotational System of PLAY Mode 2. Rotational System of FF Mode

gear (reel) (T side)

idler gear (A) (T side)

gear (Y)

insert flywheel (N)

idler gear (A) (S side)

gear (NR)

FWD REV

clutch assy (F)

idler gear (B)

insert flywheel (R)

3. Rotational System of REW Mode

idler gear (A) (S side)

gear (FR)

gear (reel) (S side)

motor pulle

reverse pulley

motor pulle

gear (reel) (T side)

idler gear (A) (T side)

gear (Y)

insert flywheel (N)

gear (FR)

motor pulle

clutch assy (F)

insert flywheel (R)

reverse pulley

gear (Y)

insert flywheel (N)

clutch assy (F)

insert flywheel (R)

reverse pulley

– 4 –

Location of controls

• Main unit

• Stereo headphones with remote control

L (left) R (right)

SECTION 2

GENERAL

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 !™ Clip

– 5 –

SECTION 3

)

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set

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

3-1. CASSETTE LID ASSY

Cassette Lid Assy Case

Ornament (OPEN) Block Assy

cassette lid assy

Sub Board, Leaf Switch, Main Board

Belt (F1), Motor (F1) (M701)

screws (M1.4x2.2

screw (M1.4x2.2)

3-2. CASE

screw (M1.4x2.2)

screw (M1.4x1.6)

mechanism deck bloc

screws (M1.4x2.2)

screw (M1.4x2.2)

battery case lid

– 6 –

case

+ 14 hidden pages