Sony WALKMAN WM-702 User Manual

WM-702,/F702 |
SECTION 1
SERVICING NOTE
This set detects reel rotation by PH701 (photo sensor),
Reel rotation cannot be detected when the system control
board is removed, because PH701 is mounted on the system
control board, As a result, the auto-off circuit and tape end
detection will misoperate. And, up and down of head and
power supply of playback circuit cannot operate when the
system control board is removed, because $703 (play switch)
is mounted on the system control board, (S703 is linked to
on and off of the plunger solenoid.)
Therefore, operation check of the mechanism deck and
voltage check can be performed by the method shown below.
—System Control Board (side B) —
SWITCH FLEXIBLE
BOARD
FF/REW mode
1) Apply the square wave signal to the PH701.
2) Press the » or € key.
PLAY mode
1) Apply the square wave signal to the PH701,
2) Press the » key.
3) Turn on S703 a few seconds later,
—System Control Board (side A) —
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{SYSTEM CONTROL BOARD]
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) a Sp
SQUARE WAVE
20Hz
0dB (1V)

Sony WALKMAN WM-702 Specifications

General

Brand	Sony
Model	WALKMAN WM-702
Category	Cassette Player
Language	English