Read Sony DVP-FX1021 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 47, 49
Check waveform
of IC701 Pin 51.
Is Digitron on normally?
Check waveform of
IC701 Pin54, 55, 56, 52?
TN_LCD
LED ON?
Check waveform
of IC701
Check and Replace
IC703.
IC703.
Pin 67.
when power S/W turn on,
Is oscillation of X701
normal?
Check and Replace C715
Check SW706
Check waveform
of IC701 Pin 1, 2.
Does pulse
waveform of RC7A1 Pin 4
appear?
Is IC701
Pin 49 connected to
RC7A1 Pin4?
Is RC7A1 Pin 3 5V?
Power on.
Check
R711~R715.
R711~R715.
and replace
Check the buttons
Solder defective parts
Replace IC701.
Solder Key part.
Check Power.
Replace IC702.
Replace IC701.
Replace RC7A1.
Re-solder.
Recheck
Replace IC701.
Complete repairing
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
RECHECK
YES
YES
Front PWB M't
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