Sony wm fx 77 service manual

Page 1

WM-FX77

SERVICE MANUAL

AEP Model
UK Model

E Model
Tourist Model

Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MT-WMEX77-60
SPECIFICATIONS
Radio section For maximum perlormance we recommend the use of
Frequency range alkaline batteries.

AEP, UK, E, Italian Model I FM: 875 - 103.0 MHZ
AM:531 - 1.602 kHI

Tourist Modal: TV: 1-12 ch FM: 7647-900 MHz
AM¢531-1.710 kHz

Antenna
AEP, UK, E, Italian Model : FM: Headphone cord antenna
AM: Built-in Ierrite bar antenna
Tourist Model: FMITV Ear receiver cord antenna
AM: EuIIt-in ferrite bar antenna

Tape player section and general
Frequency response (DOLBY NR' ott)
20 - la.ooo Hz
Output
AEP. UK. E. Italian Model: Headphones(Q/REMOTE jack) load
impedance 5 - 300 ohms
Tourlsl Model : Earphones (QlHEMoTE jack) load
impedance 34009)
Power output
4 mW r 4 rnw at Dc operation
Power requirements
1.5 v Dc
Rechargeable battery
One as (size AA) battery
Dc IN 1.5 v lack accepts (using the battery case):
Sony Ac-EtsL Ac power Idaptor (nDl supplied) ler use on
we - 120 VAC. 220 - 240 VAC, so Hz or an H:

Battery "to

Hadlofl'V

Battery Playback Receptlon

Rechargeable
oauery NC-EWM Approx 3 5 hours Approx 5 hours
lully changed

Sony SUM-3(NS) Approx 2 5 hours Approx 5 hours

Sony AM: (N) Approx 9 hours Approx 25 hours

Rechargeable
ballery ucowM Approx l2 5 hours Approx 33 hours
wlth Sony AM3 (N)

Dimensions
Approx. 108.2 x 75.7 x 27.9 mm (45/5 x 3 x1/, inches)
(w/h/d) incl. projecting parts and controls

Weight
Approx 130 g (6.3 02) (inc). rechargeable battery. not
incl. other accessories)

Accessories supplied
AEP, UK, E, Italian Model:
Battery case (1). Rechargeable battery (1), Lithium
battery (1) Battery charger (1), Stereo headphones (1),
Ear adaptors (2): It the earphones do not lit your ears,
attach the aar adaptors. Carrying case (1)
AC plug adapter (1): it the plug of the charger does not
suit your wall outlet, attach it
Headphones plug adaptor (1), Remote controller (1)

Tourist Model :

Battery case (1) Sony alkaline battery AM3(N) (l) Rechargeable
batte 1) Battery chargeru) Lithium battery (1) Remote control
unit (1 areo earphones (1) Ear adaptors (2) (II the earphones
do not fit your ears. attach the ear adaptors) Plug adaptor (1)
Carrying case (1)

'Dolby noise reduction manufactured under license irerrl
Dolby Laboratories Licensing Corporation,
DOLEY and the double-D symbol DD are trademarks oi
Dolby Laboratories Licensing Corporation.

Design and specifications subject to change without notice.

RADIO CASSETTE PLAYER

SONE

Page 2

WM-FX77

TABLE OF CONTENTS

Section Title Page
Specification ................................................................... 1
1. GENERAL

' l~1. Location and Function of Controls ------------------- 3
2 SERVICING NOTE ................................................ 4

3. ADJUSTMENTS
31. Mechanical Adjustment -~
3-2. Electrical Adjustment
4. DIAGRAMS
4-1. Block Diagram --------------
42. Printed Wiring Boardsm
4-6. Schematic Diagrams (1/2)
H. Schematic Diagrams (2/ 2)

5. EXPLODED VIEWS
51. Cabinet Sectioni-
5»2. Cabinet Section-2
53. Mechanism Section (MT-WMEX776O

6. ELECTRICAL PARTS LIST ................................ 28

Flexible Circuit Board Repairing

0 Keep the temperature of the soldering iron around
270°C during repairing.

0 Do not touch the soldering iron on the same conduc»
tor of the circuit board (within 3 times).

0 Be careful not to apply force on the conductor when
soldering or unsoldering.

Notes on chip component replacement

0 Never reuse a disconnected chip component.

0 Notice that the minus side of a tantalum capacitor
may be damaged by heat.