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LC-65D90U
TROUBLE SHOOTING TABLE
Partially whitish or darkish screen
Enter "02" for PATTERN1 on PATTERN PAGE1 in the
adjustment process menu. Is the gradation pattern properly
displayed (whitish or darkish)?
Disconnect the FPCs from SC4701, SC4702, SC6801 and
SC6802 (to protect the panel against damages).
Check the voltages being supplied to the panel
Pin 2: VH0
Pin 3: VH31
Pin 4: VH63
Pin 5: VH95
Pin 6: VH127
Pin 7: VH159
Pin 8: VH191
Pin 9: VH247
Pin10: VH255
Pin11: VLS
Pin31: VSH
Pin59: VL0
Pin58: VL31
Pin57: VL63
Pin56: VL95
Pin55: VL127
Pin54: VL159
Pin53: VL191
Pin52: VL247
Pin51: VL255
Pin78: VGH
Pin79: VGL
YES
NO
NO
7.92V
10.01V
10.50V
10.93V
11.14V
11.46V
11.87V
13.76V
14.08V
15V
3.3V
7.71V
5.61V
5.03V
4.38V
4.018V
3.614V
3.126V
1.061V
0.12V
Square wave (32V-15V)
7V
(Continued)
Is the entire screen whitish or darkish except for the test
pattern?
Check the AVC.
50
YES
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