Lcd Trouble Shooting Guide - Sony DVP-FX850 Service Manual

9-2. LCD TROUBLE SHOOTING GUIDE

Display condition
YES
VCC5V normal
YES
PNL_DVDD normal
YES
VGH normal
YES
VGL normal
YES
Y1 operate
YES
Video_Y, Video_C
YES
Is M1, U3 OK?
YES
Is U2 OK?
YES
Is U1 OK?
YES
SDA, SCL signal
YES
R, G, B signal output
YES
TFT LCD normal
Appear shadow from interference in black background
There is only bright (LCD B/D) abnormal
NO
Check CN1
NO
Check M1
NO
Check BD1
NO
Check BD2, BD3
NO
Replace Y1
NO
Check R15, R16, C82, R12, R13, C80
NO
Replace M1, U3
NO
Replace U2
NO
Replace U1
NO
Check R30, R31, R32, R33
NO
RP1, RP2 check
NO
Replace
9-6E
Inverter abnormal
NO
Replace