DVP-FX705 - Sony DVD Service Manual (repair manual). Page 74

Read Sony DVP-FX705 Service Manual online

9-5
3. Front Circuit(Dogotrpm & Key)
NO
NO
NO
START
Does remote control
work normally?
Do all the
buttons work
normally?
Check waveform of
IC701 Pin 24, 36
Check waveform
of IC701 Pin 3.
POWER
LED ON? 
Check waveform
of IC701 Pin 33.
when power  S/W turn on,  
 Is oscillation of X701  
normal?
Check SW707
Check waveform
of SW707. 
Does pulse
waveform  of RC701 Pin 1
appear?
Is IC701
Pin 24 connected to
RC701   Pin1? 
Is RC701 Pin 3  5V?
Power on.
Check 
R746,R747,R756,R749,R750
and replace
Check the buttons
Solder defective parts
Replace IC701.
Solder Key part.
Check Power.
Replace IC702.
Replace SW707.
Replace RC701.
Re-solder.
Recheck
Replace IC701.
Complete repairing Front B/D.
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
RECHECK
YES
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