Hitachi L32A102 Service Manual page 41

SYMPTOM: NO AV1/AV3 AUDIO ABNORMAL
No AV1/AV3 audio
Check if signal of H18
pin 2,4,13,15 is normal**
Yes
Check if signal of U22
pin 55,56,59,60 is normal**
Yes
Check if signal of
U6 pin 1,7 is normal**
Yes
Check if signal of U31
pin 1,2,14,15 is normal**
Yes
Replace Speaker
* Refer to DC voltages page
** Refer to Waveforms page
No
Replace connection
No
Replace U22
No
Replace U6
No
Replace U31
41