Sony WALKMAN WM-702 Service Manual

MICROFILM
SERVICE MANUAL
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol DQ are trademarks of
Dolby Laboratories Licensing Corporation.
SPECIFICATION
Radio section (WM-F702)
Frequency range
US model: FM: 87.9-107.9 MHz
AM: 530-1,670 kHz
AEP, UK model: FM: 87.5-108 MHz
AM: 531~1,602 kHz
ET, AUS model: TV: 1-12 CH
FM: 76.0-90,0MHz
AM: 531-1,629 kHz
Antenna
FM: Headphone cord antenna
AM: Built-in ferrite bar antenna
Tape player section and genera!
Frequency response (DOLBY NR off)
15~— 18,000 Hz
Output
Headpnones (PHONES /REMOTE) Jack
load impedance 8-300 Q
Power output
5mW+5mW at DC operation. 162
Power requirements
1.5 VDC
Rechargeabie battery
One R6 (size AA) battery
Battery life
dio R i
ee
fully charged
Approx. 1.5 hours Approx. 2.5 hours
Sony AM3 (N) Approx. 10 hours
Rechargeabie NC-6WM
with Sony AM3 (N)
Approx. 10 hours Approx. 12 hours
For maximum performance we recommend the use of aikaline
batteries.
Dimensions
WM-702 : Approx, 104.8X72.2X19.1mm (w/h/d)
WM-F702: Approx. 104.8X72.2x23.3mm (w/h/d)
excl. projecting parts and controls
WM-702 : Approx. 106.4% 74.6 20.7mm (w/h/d)
WM-F702: Approx. 106.4x74.6x25.4mm (w/h/d)
incl. projecting parts and controls
Weight
WM-702 : Approx. 150g
WM-F 702: Approx. 190g
incl. rechargeable battery, excl, other accessories
Accessories supplied
Battery case (1) Battery charger (1)
Rechargeable battery (1) Lithium battery (WM-F701 ONLY, 1)
Stereo headphones with remote controller (open-air type. 1)
Plug adaptor (1) Carrying case (1)
US Model
WM-F702
AEP Model
UK Model
E Model
WM-702
WM-F702
Photo : WM-F702
Model Name Using Similar
Mechanism
Tape Transport Mechanism Type | MT-WM702-17
WM-701C
TABLE OF CONTENTS
Section Title Page
Specifications --+-- saceccaseerssscenoeees seeses s e e eeteeerneseens teeeeecesseevesees 1
SERVICING NOTE:
GENERAL
4-1, Semiconductor Lead Layouts
4-2, Printed Wiring Boards —Cassette Section str: 8
4-3. Schematic Diagram ~—Cassette Section—srterrrr 11
4-4, IC Block Diagrams srrrterssssessseesseeeeteeeenes istiogtece 414
4-5, Printed Wiring Boards —Radio Section srr 15
4-6, Schematic Diagram —~Radio Section— srrrrressr 17
EXPLODED VIEWS ceccecesees belssusesseeseatastsietes sisnpedee coed] Q
ELECTRICAL PARTS LIST -s:ssesccsseeees Nerrres satiecs wees 23
wm-702: CASSETTE PLAYER
Design and specifications subject to change without notice.
Note: AUS: Austrarian model WM-F702 i A 10 ASSETTE PLA R