Sony wm pg 51 service manual

Page 1

WM-GX50/GX51

SERVICE MANUAL AEPMode/

UK Model
Saudi Arabia Model

WM-GX50 WM-GXSI

Model Name Using Similar Mechanism WM-BF608
Tape Transport Mechanism Type M F-WMBF608
SPECIFICATIONS
WM-GX50
Radio section Accessories supplied
Frequency range Stereo headphones (1)
Stereo microphone rt)
Where purchased FM (MHz) AM (kHz) Microphone stand (1)
in Italy 575405 5265-16065 cawm case (1)
in Germany 375-107 sax M1502 Desagn and specifications subject la change without nolrce.
tn SaudirArabia 816-07 530 -1805 Note
In other countries 3754073 531 -1602 This appliance conrorrns wnh EEC Directive B7/308IEEC regarding
lnrarierence suppression
lniennealate troquency FM: 28.6 MHz 150 kHz
AM: 55 kHz Optional accessones' AC power adaptur Ac-EisL
Power requirements 1.5 v DC Car battery cord DCC-EVISL
One as (5.29 AA) battery Rechargeable battery NC-sWM
Hechargeable battery (NC-GWM) (not supprred) Ballefy chaser BC»7L
DC IN 15 v jack accepts . You, dame, m r
y not handle these oplrcnal accessories. Please ask
SW 5 9 PM SW" the oealer tor deialled intermation.
(not supplied) for use on:
European and Saudi-Arabia model 220 v Ac, so Hz
120 v Ac, so Hz
Other model 220 v AC. 50 Hz
Battery tire (Approximate hours)
Playback Radio reception :fggflg'ggo -C°"Y'"U9d 0" Page 2-
Sony AMs (N) 5 hrs, 1 hrs. 2 hrs.

Dimensions
Approx. 108.6 x 78.8 x 35.2 mm(wlh/d)
(4% x 3y. x m. incheel
Incl. projecting park and controls
Wslghrl
Approx. 223 g (7.9 or) not Incl. binary and other accessones

RADIO CASSETTE BORDER
SON Y;

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WM-GX50/GX51

WM-GX51
Rndlo action
Frequenw range
Where purchased FM (Mt-l1) AM (kHz)
In Italy 875-106 5fi-161l
In Germany 675-108 531-1602
In Saudi-Arable 875-105 531-1602
In other countries 875-108 531-1502
Intermediate trequency
FM: 10.75 MHZ
AM: 450 kHz
Antenna

FM: Headphones cord antenna
AM: Bum-In ierriie bat antenna

Recording occtlon
Recording system
4-track 2-cnannet stereo
Input
Mlcrophone input (stereo mlniJack)
(PLUG IN Poll/ER) sensitivity 0.77 rnv (-60 dB) ier lcmer
impedance microphone

hp. payer eectlon and general
Frequency response (DOLBV NR on)
40 Hz-IS kHz (with I! PB ED selector set to NORMAL or
CrOdMETAL)
Output
Hudpnones (mien miniiack)
Load impedance s-aoon
Power output
5 mW + 5 MW at no operation, isn
Power requirements
15 V DC
Rechargeable battery
one We (size AA) battery
DO IN 15 v lack accepts;
0 Sony AC-EtsL Ac power adaptor (not supplied)
available In the United Kingdom tor use on 240 V AC.
50 HI
available in other European countries lor use on 220 V
M}. 50 H2
avallable In other countries lor use on too-lzo V AC or
ab-ZmVACJOorBO Hz
. Sony occEiisL (not supplied) for use with 12 v car

battery
Bauery life (hours)
Radio Recording from
Bane mac" reception the built-in radio

Sony Ame (N) Approx. 5 Approx. 7 Approx. 2
For maximum pertormanoe we recommend the use of alkaline
batteries.

Dimensions
Approx. toes x m x 35.2 inmtwlh/d)
143/, x 31. x 17/5inohes)
incl. projecting parts and controls
Weight
Approx. 226 g (5.0 oz) not Incl. battery and other
accessories
Accessories suppllod
Limiuin battery (CRZOIG) (1) Miuepmne (I)
Microphone stand (1) Stereo headphones (I)
Carrylng case it)

Design and specifications subject to change without notlce.

Nola
This appllence commutes with EEC Directive Emma/EEC
regarding interterenoe suppression.

optionallocenorles

Ac power adaptor AcEisL
Battery charger BC-7L
Rechargeable binary NO-BWM.
Car battery cord DCC-E115L
Lithium battery CRZDIB

Vour dealer may nit handle sortie ot the above listed optional
accessories. Please ask the dealer for demiled information.

TABLE OF CONTENTS
Section Title Page

SECTION 1. GENERAL
Parts Identification Nomenclature (WM-6X50) """"""" 3
Parts Identification Nomenclature (WM-6X51) "
Service Notes ~~~~~~

SECTION 2. DISASSEMBLY

2-1. Cabinet (Rear) Assy Removal --------------------- 6
2-2. Flexible Board Removal ---------------
2-3. Tuner Board Removal (WM-6X50) """"""

Tuner Board Removal (VIM-(1X51) -------------------- 7

SECTION 3. ADJUSTMENTS
3-1. Mechanical Measurements ~
3-2. Electrical Adjustments -~

SECTION 4. DIAGRAMS

4-1. Block Diagram (Audio Section) ----------------- 15

Block Diagram (Tuner Section WM-GXED) .. - 17

Block Diagram (Tuner Section VIM-6X51) ~' '- 19
4-2. Printed Wiring Boards (Audio Section) 21
4-3. Schematic Diagram (Audio Section) ~~~~~~~~~ -- 25
4-4. Schematic Diagram (Tuner Section VIM~GX51I ------- 30
4-5. Printed Wiring Boards (Tuner Section VIM-6X51) 33
4-6. Printed Wiring Boards (Tuner Section VIM-6X50) 35
4-7. Schematic Diagram (Tuner Section lIM-GXSO) ~~~~~~ 37

SECTION 5. EXPLODED VIEWS
5-1. Cabinet Section-1
5-2. Cabinet Section-2 - - - - - . -
5-3. Mechanism Section-I (MF-WMBFGDS) ~
5-4. Mechanism Section-2 (MF-WMBFBDE) ~~ ----- - 42

SECTION 6. ELECTRICAL PARTS LIST """"""" 43

SAFETY-R E LATED COMPONENT WARNINGII

COMPONENTS IDENTIFIED BV MARK A OR DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONY.

WARNING I!

ADVARSEL!

Lithiumbattcri A Eksplosionsfare
Udskiftning m3 kun forctages
af en sagkyndig, og som
bcskrevct i scrvicemanualcn.

LITHIUM BATTERY

SHOULD ONLY BE CHANGED BY TECHNICAL
PERSONNEL. THERE IS A RISK FOR EXPLOSION
AT A WRONG HANDLING.