AOC 198PW Service Manual page 27

19" LCD TV
5.5 No sound
No sound
Check input signal
OK
Check signal filter circuit
OK
Check Earphone jack
OK
Check audio decode U601
Check amplifier U602
OK
Check audio
NG
Reset input signal
NG
Replace the filter or inductance
NG
Check Earphone jack
NG
SIF signal
NG
AV, Component,
S-video, PC signal
NG
NG
Replace U602
NG
Replace audio
OK
Check TV system setup
OK
Check TU101
OK
Check U601
27
AOC 198PW
NG
Replace TU101
Check pertinent circuit