Panasonic TH-42PX75U - Page 35

<Diagnosis (3)>
Diagnosis for Picture Problem (All Over the Screen)
<Result>
Confirm the waveform at “TPSC1” after removing the SU or SD Board from the SC Board
Situation
Disconnect SU Board
(Connect SD)
Condition
Waveform OK?
Cause
SU Board
Disconnect SD Board
(Connect SU)
Waveform OK?
SD Board
Disconnect the SU
and SD Boards
Waveform OK?
SC Board
<Back side view>
SU
SD
SC SS
Buffer IC Buffer IC
TPSC1
Correct Waveform
Condition 2
Bottom half of
Picture OK?
Upper half of
Picture OK?
Screen should
be black
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