Hitachi 42PD8900TA Service Manual page 44

[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
42PD8900TA
Yes
Check
SOUND PWB
Yes
Check
FC PWB
Yes
Check around
PFM1
Yes
Check around
PMF1
Yes
Check
I201
Yes
Check around
I201
Yes
Check
I203
44