Troubleshooting.pdf

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5 Troubleshooting
5 Troubleshooting
5-1 No Power
Does DC 13V, 5V
1
2
No
Check Inverter/Adaptor Board.
1
WAVEFORMS
appear at CN600?
Yes
Does DC 3.3V
3
No
Check related circuit of IC602.
appear at R608?
Yes
2
Does DC 3.3V
4
No
Check related circuit of IC601.
appear at C602?
Yes
3
Check IC700(VCTI-D2),
IC202(Micom) and
IC300(MST51510).
4
5-1
5 Troubleshooting
5-2 No Video (PC Signal)
Power Indicator is green.
Yes
Does a signal appear at
C105,C106 and
C107(R,G,B Input)?
No
7
Check related circuit of CN101.
WAVEFORMS
9
Yes
Does a signal appear at
R114,R110(H/V Sync)?
7
8
No
Check related circuit of CN101.
8
Yes
Does a signal
appear at pin 1~30
of CN301(LVDS output)?
10
No
Check related circuit of IC300.
9
Yes
Replace LCD Panel.
10
5-2
5 Troubleshooting
5-3 No Picture (TV)
Does a signal appear at
PIN1, 2
of FT700(X6966M)?
No
5
Check CN700 and Tuner.
5
WAVEFORMS
Yes
Does a signal appear at
(PIN71,72,73,
74,75,78,79,80) of IC700?
6
No
Check related circuit of IC700.
Yes
6
10
Does a signal appear at
PIN1~30 of CN301
(LVDS output)?
No
Check IC300.
Yes
10
Replace LCD Panel.
5-3
5 Troubleshooting
5-4 No Picture (VIDEO/S-VIDEO/SCART )
Does a signal appear at
C740(VIDEO)/C742,C744
(S-VIDEO)/C741(SCART)?
No
Check CN506.
6
WAVEFORMS
Yes
Does a signal appear at
(PIN71,72,73,74,
75,78,79,80) of CN501?
6
No
Check related circuit IC1700.
Yes
10
Does a signal appear at
PIN1~30 of CN301
10
(LVDS output)?
Yes
No
Check IC300.
Replace LCD Panel.
5-4
5 Troubleshooting
5-5 No Sound(TV)
Does a signal
appear at pin1, 2
of FT700(X6966M)?
5
No
Check CN700 and Tuner.
5
WAVEFORMS
Yes
12
Does a signal appear at
R563, R566?
No
Check related circuit IC700.
Yes
11
No
11
Does a signal appear at
Pin5, 2, 9, 16 of IC55
(SL/SROUT)?
Check related circuit IC55.
Yes
12
Check the Speaker L/R.
5-5

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