Sony wm 701 c service manual

Page 2

WM-701 C

SECTION 1
SERVICING NOTE

This set detects reel rotation by PH701 (photo sensor). FF/REW mode
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

1) Apply the square wave signal to the PH701.
2) Press the » or » key.

head and power supply of playback circuit cannot operate PLAY mode

when the system control board is removed, because $702 1) Apply the square wave signal to the PH701.
(play switch) is mounted on the system control board.(S702 2) Press the y key.

is linked to on and off of the plunger solenoid.) 3) Turn on S702 a few seconds later.
Therefore, operation check of the mechanism deck and

voltage check can be performed by the method shown

below.

-System Control Board (side A) - -System Control Board (side B)-

SOUARE WA VE
OSCILLA TOR

C9

20H:
0dB{V} (1 VI