Haier L22C360 Service Manual page 44

Service Manual
Model No.:
5 TV failure
Fix the RF
set
Check if there
is I2C signal
at PIN4 &
PIN5 of TUNER
N
Check the I2C
circuit
between
U10 and
TUNER1
TV no channel
Check if there is RF
N
signal input
Check if there is
+5V at PIN7 of
TUNER1
Check if there is
intermediate
frequency signal
Y
output at PIN11 of
TUNER1
Check the
tuner
- 44-
Y
N
Y
Y
Check the signal
circuit between
U10 and TUNER1
Check the power
supply circuit to
this PIN7