Haier HL22KN1 Service Manual page 52

Function Trouble （DVB-T）
DVB No sound
Check if the input circuit were
mounted firmly
Ｙ
Remount
Ｕ29's input circuit has damaged
DVB no sound
CheckＵ26's Pin202，203，204 output signal?
Check if Ｕ29's Pin1，2，3 have audio signal input
N
Ｙ
Check if U29's Pin6,9 have audio output
N
Ｎ
Check 5V supply for U29 ?
Change U29
N
Ｕ26's audio out pin had short circuited?
Ｙ
Ｙ
Check the circuit of audio output
OK
N
Check power supply for
Ｕ26(PNX8316HS/102)
Or change U26