Lcd Trouble Shooting Guide - Sony DVP-FX720 Service Manual

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9-2. LCD TROUBLE SHOOTING GUIDE

Display condition
YES
VCCDC normal
YES
VCC5V normal
YES
PNL_DVDD normal
YES
VGH normal
YES
VGL normal
YES
Y1 operate
YES
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Video_Y, Video_C
YES
Is M1, U3 OK?
YES
Is U1 OK?
YES
SDA, SCL signal
YES
R, G, B signal output
YES
TFT LCD normal
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NO
NO NO
NO
NO
NO
Check BD4, BD5, BD6
NO
NO
Check R19, R21, C25, R14, R17, R18, FB1, C24
NO
NO
Check R24, R26, R31, R33
NO
NO
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2 9
8
Check CN2
Check CN2
Check M2
Check BD2, BD3
Replace Y1
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3 6 7 1 3
Replace M1, U3
Replace U1
Check R8, R7, R5
Replace
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9 4 2 8
1 5 0 5 8 2 9 9 4
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2 8 9 9