Panasonic PT-AE8000U Service Manual page 26

 No picture or abnormal picture is output
Check each cable connection
Input a signal other than black and confirm
No display of VIDEO input
No display of S-VIDEO input
No display of COMPUTER input
No display of COMPONENT input
No display of HDMI input
No picture is displayed.
Check the output wave form of connectors
A
(A1, A2 and A3).
Check drive clock of IC1001(Video digitizer).
A
R1185 : 24.576MHz
Check the output wave form of IC1030
(LCD controller).
A AI_RLVCLKN : T32 pin
AI_GLVCLKN : AG32 pin
AI_BLVCLKN : D34 pin
Check the input wave form of IC1030(LCD controller).
A AY_LOUT1CN : R1712,
AY_LOUT2CN : R1718,
A Replace the A-P.C.Board.
OK
NG
OK
NG
AY_LOUT3CN : R1724
AY_LOUT4CN : R1730
OK
NG
Connect properly
Follow the section "VIDEO input checks".
Follow the section "S-VIDEO input checks".
Follow the section "COMPUTER input checks".
Follow the section "COMPONENT input checks".
Follow the section "HDMI input checks".
OK
Check A1,A2 and A3 connectors.
A
Replace optical block.
NG
Check circuit around IC1046 and X1002.
A
(R1185、R1372、R1367、L1088、L1086)
OK
Check between the A1, A2, A3 connector 44 pin and
A
IC1030.
OK
Check each voltage of IC1030.
A
Replace IC1036 and IC1037.
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