Hitachi 42PD8900TA Service Manual page 43

[PW3 Sound Circuit]
No sound of HDMI1
JF400
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 50,52 of PMF1(L,R)?
No
Are waveforms at
pin 13,3 of IC808?
No
Are waveforms at
pin 12,1of IC808(L,R)?
No
Are waveforms at
pin 2,6 of IC800?
No
Are waveforms at
pin 7,8 of IC801?
No
Are waveforms at
pin 1,2,3,16 of IC801?
No
Are waveforms at
pin 84,85,86,88 of IC400?
No
(No sound of HDMI1)
Are waveforms at
pin 39,40,43,44,47,48,51,52
of IC400?
No
Check around
JF400,IC400
42PD8900TA
No sound of HDMI2
JF401
Yes
Check
SOUND PWB
Yes
Check
FC PWB
Yes
Yes
Check around
PFM1
Yes
Check
IC808
Yes
Check
IC800
Yes
Check around
IC800
Yes
Check
IC801
Yes
Check around
IC801
(No sound of HDMI2)
Yes
pin 58,59,62,63,66,67,70,71
No
Check
IC400
43
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 14,5 of I203(L,R)?
No
Check around
I203
No
Yes
Are waveforms at
of IC400?
Check around
JF401,IC400
Yes
Check around
PFM1
Yes
Check around
PMF1
Yes
Check
I201
Yes
Check around
I201
Yes
Check
I203
Check
IC400