Sony WALKMAN WM-F702 - User 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
Rechargeable
NC-6WM
Abéhox:3
houre
seme
amie
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 see eeteeerneseens teeeeecesseevesees 1
SERVICING NOTE:
GENERAL
Location
and
Function
of
Controls
ccecsesrersesreceereeren
sevens
3
ADJUSTMENTS
3-1.
Mechanical
Adjustmentserrrtrrrrrereereres
Saliva
aicleisabibaiebaien's
4
3-2.
Electrical
Adjustments
:rrsrtsrersereres
cecssccccceseeesensesed
DIAGRAMS
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

Sony WALKMAN WM-F702 Specifications

General

Type	Cassette Player
Tuner	FM/AM
Power Supply	2 x AA batteries
Voltage	3V
Special Features	Auto-reverse

Summary

Specification

Servicing Note

FF;REW Mode Testing

Procedures for testing FF/REW function using square wave signal.

Play Mode Testing

Procedures for testing PLAY mode using square wave signal.

General Information

Controls and Functions

Identifies and describes the unit's buttons, switches, and indicators.

Adjustments

Mechanical Adjustments

Procedures for torque and tension measurements and adjustments.

Electrical Adjustments

Procedures for tape speed, playback head azimuth, and level adjustments.

Diagrams and Layouts

Semiconductor Lead Layouts

Shows lead pin configurations for various semiconductors.

Printed Wiring Boards - Cassette Section

Illustrates the physical layout of the cassette section's printed circuit boards.

Schematic Diagram - Cassette Section

Provides the detailed circuit diagram for the cassette section.

IC Block Diagrams

Visual representation of the internal logic and functions of key integrated circuits.

Printed Wiring Boards - Radio Section

Illustrates the physical layout of the radio section's printed circuit boards.

Schematic Diagram - Radio Section

Provides the detailed circuit diagram for the radio section.

Exploded Views

Electrical Parts List

Supplement-1

Radio Section Block Diagram

Block diagram illustrating the radio section's signal flow and components.

Correction Notice

Details corrections to be made in the main service manual.

IC Terminal Functions

Describes the function of each terminal for specific integrated circuits.

Cassette Section Block Diagram

Block diagram illustrating the cassette section's signal flow and components.