Hitachi 32PD7800 - Page 40

40
32PD7800/42PD7800 (PW2)
No picture, no color or dark
Are waveforms at
QH20<E>(Y),
QH21<E>(Cb) and
QH22<E>(Cr)?
Check ETV3 and VIDEO PWB
Check IH13
Are waveforms at
12pin(Y), 15pin(Cb)
and 7pin(Cr) of IH13?
Check QH20, QH21 and QH22
Yes
No
Yes
No
No sound
Are waveforms at
37pin(L) and 35pin(R)
of PHV1?
Check ETV3 and VIDEO PWB
Are waveforms at
7pin(L) and 8pin(R) of
IH14?
Yes
No
Check IH15
Are waveforms at
26pin(SCK), 32pin(BCK),
30pin(DATA) and
31pin(LRCK) of IH13?
Yes
No
Check IH14
Check IH13
Yes
No
[HDMI PWB Circuit]