Table of Contents
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TV Signal
[Tuner PWB Circuit]
DTT Signal (DTT Teletext)
[I/F B PWB Circuit]
42PD7500/42PD7500A (PW2)
No Picture of TV
Is waveform at
pin 49 of PTV2
(TV,CV?)
No
Is waveform at
pin 7 of I101
(TV,CV)?
No
Is waveform at
pin 18 of U101
(TV,CV)?
No
Check U101
No Picture of DTT
(No Teletext of DTT)
Check HDMI PWB
Are waveforms at
PHD1 connector?
(Pin19,20,21,24)
No
Check I/F B PWB
Are waveforms at
PL6 connector?
(Pin19,20,21,24)
No
Change I/F B board
NG
Check DTT module board
Yes
Check
Video PWB
Yes
Check Q106
Yes
Check around
Q101,Q102,Q103
Check Video PWB
Yes
[Pin12,14,17 of I601]
[Pin30 of I201]
Yes
Check connector wires(EBH)
OK
I/F B board
30
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