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 46,47.
Check waveform
of IC701 Pin 59.
Is Digitron on normally?
Check waveform of
IC701 Pin52, 54, 55, 56?
LED ON?
Check waveform
of IC701
Check and Replace
IC 2M5
Pin 67.
when power S/W turn on,
Is oscillation of X704
normal?
- Check and Replace C704,
R709, R710, R711
- Solder defective parts again
T701
Check the connection
of CON901, CON701.
Check waveform
of IC701 Pin 46,47.
Does pulse
waveform of RC901 Pin 1
appear?
Is IC701
Pin 49 connected to
RC901 Pin 1 ?
Is RC901 Pin 2 5V?
Power on.
Check
-R701~706, R728~R736, R743, R738
-R551~R558
and replace
Check and Replace
Q701, Q501.
Solder defective parts
Replace IC701.
Solder Key part.
Check Power.
Replace IC702.
Replace IC701.
Replace LED903 .
Replace RC901.
Re-solder.
Recheck
Replace IC701.
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
YES
YES
www. xiaoyu163. com
QQ 376315150
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8
TEL 13942296513
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9
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
