Hitachi 42PD9700C Service Manual page 47

[PW3 Sound Circuit]
Check FC PCB
Are waveforms at
pin 2,4,5,6,10,11
of PFA ?
No
Are waveforms at
pin 31,32,33
of I600?
No
Are waveforms at
pin 29,38,40 of I600?
No
Are waveforms at
pin 10,11,12 of IC803?
No
Are waveforms at
pin 1,2 of IC803?
No
Are waveforms at
pin 1,14 of IC804?
No
Are waveforms at
pin 6,9 of IC804?
No
Are waveforms at
pin 45,47 of PFM1?
No
Check around
PFM1,PMF1
42PD9700 & 55PD9700
Yes
Check around
PAF1
Yes
Check around
PFA1
Yes
Check I600
Yes
Check around
I600
Yes
Yes
Check around
IC803
Yes
Check IC804
Yes
Check around
IC804
46
Is waveform at
pin 15 of IC803?
No
Is waveform at
pin 2 of IC802?
No
Is waveforms at
pin 3,6 of IC802?
No
Check X800
Yes
Check IC803
Yes
Check around
IC803
Yes
Check IC802