Hitachi 42PD9700C Service Manual page 45

[PW3 Sound Circuit]
No sound of Bridge Media Unit
Are waveforms at
pin 2,4,5,6 of PAF1?
No
Are waveforms at
pin 45,47 of PFM1(L,R)?
No
Are waveforms at
pin 45,47 of PMF1(L,R)?
No
Are waveforms at
pin 43,45 of I201(L,R)?
No
Are waveforms at
pin 59,61 of I201(L,R)?
No
Are waveforms at
pin 13,3 of I203(L,R)?
No
Are waveforms at
pin 15,2 of I203(L,R)?
No
Check
Bridge Media Unit
42PD9700 & 55PD9700
Yes
Check
SOUND PCB
Yes
Check
FC PCB
Yes
Check around
PFM1
Yes
Check around
PMF1
Yes
Check
I201
Yes
Check around
I201
Yes
Check
I203
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