Lcd Trouble Shooting Guide - Sony DVP-FX810 Service Manual

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9-2. LCD TROUBLE SHOOTING GUIDE

Display condition
YES
VCC5V normal
YES
VCC2.5V normal
YES
VGH normal
YES
VGL normal
YES
Y1 operate
YES
Video_Y, Video_C
YES
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L 13942296513
Is Q4, U9 OK?
YES
Is U4 OK?
YES
Is U1 OK?
YES
SDA, SCL signal
YES
R, G, B signal output
YES
TFT LCD normal
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Appear shadow from interference in black background
There is only bright (LCD B/D) abnormal
NO
Check HA4
NO
Check Q4
NO
Check D10, D7
NO
Check D6, D8, D9
NO
Replace Y1
NO
Check R42, R43, C4, R44, R45, C9
NO
Replace Q4, U9
NO
Replace U4
NO
Replace U1
NO
Check RN1, R4, R5
NO
R1, R2, R3 check
NO
Replace
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2 9
8
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3 6 7 1 3
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9-6E
9 4 2 8
Inverter abnormal
NO
Replace
1 5 0 5 8 2 9 9 4
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9 9
2 8 9 9