Haier L22C360 - 5) TV Failure Troubleshooting

Service Manual
Model No.:
5˅TV failure
TV no channel
Check if there is RF
signal input
Y
Check if there is
+5V at PIN7 of
TUNER1
N
Y
Y
Y
N
Check the power
supply circuit to
this PIN7
Check if there is
intermediate
frequency signal
output at PIN11 of
TUNER1
Check if there
is I2C signal
at PIN4 &
PIN5 of TUNER
Check the I2C
circuit
between
U10 and
TUNER1
Check the
tuner
Check the signal
circuit between
U10 and TUNER1
Fix the RF
set
N
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