LG RE-28CB80RX Service Manual page 20

No
OK
Check IC01 pin37,42,43,44
(IK, R,G,B)
No
Check / Replace
IC01
Check
5V, 33V &
IIC Bus Line
Check / Replace
IC01, Tuner
OK
Check
CVBS signal Line
& IC01
No Picture / No Sound
No
No
No
Check IK
Signal at
IC01 pin37
(similar to CBVS)
- 20 -
Is any OSD displayed?
OK
Check receiving system in MENU
& execute Auto - Program.
Does the auto - Program
Operate properly.
OK
Store on manual - program MENU
Check 5V, 33V & IIC Bus Line
Of Tuner.
OK
Is the CVBS signal OK.
(IC01 pin10 or 22)
OK
Check R,G,B signal
At IC01, pin42,43,44
OK
Check / Replace
CPT Board component
OK
Go to
No Sound /
Picture OK