Sony wm f 707 service manual
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Extracted text from sony wm f 707 service manual (Ocr-read)
Page 2
WM - F707
SECTION 1
SERVICING NOTE
This set detects reel rotation by PH701 (photo sensor). FF/REW mode
Reel rotation cannot be detected when the main board is 1) Apply the square wave signal to the PH701
removed, because PH701 is mounted on the main board. 2) Press the « or » key,
As a result, the auto-off circuit and tape end detection
will misoperate. And. up and down of head and power PLAY mode
supply of playback circuit cannot operate when the main 1) Apply the square wave signal to the PH701.
board is removed. because S702 (head switch) is mounted 2) Press the (a)
to the main board (S702 is linked to on and off of the 3) Turn on $702 afew seconds later.
plunger solenoid.)
Therefore. operation check of the mechanism deck and
voltage check can be performed by the method shown
below.
-MAIN Board (side A) - -MAIN Board (side B) -
SQUARE WAVE
OSCILLATOR
® 20 Hz
0 dB (V)
(1V)