Daewoo LA32L1B1LM, Service Manual

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Hardware Trouble shooting
-19-
3) No Picture-Digital TV mode
Check the IC path.
Tuner(TU101): LC111, CC156~158, RC104, RC105
STV0374(IC101): RA101~103, RC122
B+: 1V: (Pin10,34,35,42,53,58,68,78,89)
2.5V: (Pin14,18,19,28)
3.3V: (Pin49,67,80)
START
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Select Air/Cable in Ant. Set correctly
Check the SMPS and input voltage
IC101 problem.
Replace the Main PCB.
Check the
Ant set is correct in
Menu
Check the
LVDS signal output of
IC101 is correct
Check
The LVDS connector
And cable is Correct
Does digital signal
Input from IC101 to
IC401
Yes
Check the
LVDS signal output of
IC101 is correct
Yes
No
Check the SMPS and input voltage
Does digital signal
Input from IC101 to
IC401
Yes
No
Check the path from IC101 to IC401
Check the input
power of IC101
is correct
Yes
No
Check the path from TU101 to IC101I
Check the path
from TU101 to
IC101 is correct
Perhaps Connector and
Cable problem.
Replace connector or cable.
Yes
No No
IC101 problem.
Replace the Main PCB.
Replace the Main PCB
Check
The LVDS connector
And cable is Correct
Perhaps Connector and
Cable problem.
Replace connector or cable.