Function Trouble (Tv Video) - Daewoo LX32L1 Series Service Manual

Hardware Trouble shooting

5-6) Function Trouble (TV video)

N
Check external
RF
signal source
TV can't search any
channel/no picture
Confirm if the RF
cable do have signal cable do have signal
Y
Check if t1-pin9&10have signal
Y
Check if T2-pin2 for variational
Check the circuit
from T2-pin9&10 to
Change T2
U12
and the power
supply for U12
-12-
Check if T2-pin7 for 5V
Y
Check if T2-pin5,6 has
I 2 C signal
N
voltage within 1.8V~4.3V
Y N
Check the circuit
in this part in this part
Y
N
N
2
Check the I C circuit
(between T1-pin5,6
and 82,83)
Check the
power
supply
circuit