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HDMI
[HDMI PWB Circuit]
No picture, no color or dark
Are waveforms at
QH20<E>(Y),
QH21<E>(Cb) and
QH22<E>(Cr)?
NO
Are waveforms at
12pin(Y), 15pin(Cb)
and 7pin(Cr) of IH13?
NO
Check IH13
No sound
Are waveforms at
37pin(L) and 35pin(R)
of PHV1?
NO
Are waveforms at
7pin(L) and 8pin(R) of
IH14?
NO
Are waveforms at
26pin(SCK), 32pin(BCK),
30pin(DATA) and
31pin(LRCK) of IH13?
NO
Check IH13
YES
Check ETV3 and VIDEO PWB
YES
Check QH20, QH21 and QH22
YES
Check ETV3 and VIDEO PWB
YES
Check IH15
YES
Check IH14
PDM-4220
31
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