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4 Troubleshooting



4 Troubleshooting
4-1 No Power

Does DC 13V, 5V No
appear at CN400? Check Inverter/Adaptor Board


Yes

Does DC 3.3V No Check circuits related
Appear at FT412? to IC405.


Yes

Does DC 3.3V No Check circuits related to
Appear at FT414? IC407.


Yes

Check IC701(VCTi), IC703,
and IC301(SE6181LA)




4-1
4 Troubleshooting

4-2 No Picture (PC)


Power Indicator is black.

Does a signla appear at
C106, C107 and C108 No
1 (R,G,B Input?) Does a signla Check circutis related CN100.
appear at C106, C107 and C108
(R,G,B Input?

Yes

Does a signal appear at
No
2 3 Check circuits related CN100.
R113 and R115(H/V Sync)?


Yes

Does a signal appear at
No
4 Check circuits related IC301.
1~30 of CN300(LVDS out)?


Yes


Replace LCD PANEL.




4-2
4 Troubleshooting


WAVEFORMS

1 2




3 4




4-3
4 Troubleshooting

4-3 No Picture (TV)

Does a signal appear at No
Check TU200(TUNER).
5 PIN 2 of FT700 (X6965)?


Yes


Does a signal appear at
No Check the circuits related to
PIN71,72,73,74,75,78,79,80
IC701.
of IC701? 6


Yes


Does a signal appear at No
Check IC301.
4 PIN 1~30 of CN300?


Yes


Replace LCD Panel.




4-4
4 Troubleshooting


WAVEFORMS

4 5




6




4-5
4 Troubleshooting

4-4 No Picture (Video/S-VIDEO)

Power Indicator is off.
Lamp on, no picture.



Dose the signal appear at No Check a A/V cable and
R717,R718,R719 video signal.


Yes


Does the signal appear at No
Check a connection harness.
5 PIN(71:80) of IC702?


Yes


Does the digital data
No Check a IC702.
appear at output of LVDS
Change a main PCB ass'y.
4 (RA301~RA303)?


Yes


Check a LVDS cable? No Check a IC301.
Replace lcd panel? Change a main PCB ass'y.




4-6
4 Troubleshooting


WAVEFORMS

4 5




4-7
4 Troubleshooting

4-5 No Sound (TV)

Does a signal appear at
No
5 PIN 1,2 of FT700 Check Tuner.
(X6965M)?


Yes


Does a signal appear at No Check the circuits relevant
7 R538 and R542? to IC701.


Yes


Does a signal appear at No Check the circuits relevant
PIN 2,5,9,16 of IC502
to IC502.
(SL/SR OUT)?


Yes


Check the Speaker L/R.




4-8
4 Troubleshooting


WAVEFORMS

5 7




4-9
4 Troubleshooting

Memo




4-10