Main Pcbs Trouble Diagnosis; 6-1-1.Common Checking Process When "No Signal Of Noraster - Daewoo DLT-26C2 Service Manual

6. Main PCBs Trouble Diagnosis

6-1.Main PCB Trouble Diagnosis

6-1-1.Common checking process when "No signal of Noraster"

No signal : OSD is work but no images are displying
No raster : OSD as well as images in not working
Check start
Does No signal
screen appear?
Y
Is the signal
input Jack properly?
Y
Does input source
(AV device) work?
Y
Is input selection
in the Correct mode?
Y
Replace Main PCB
and/or Sub PCB
N
N
Check the connection
of Jack
(LCD and AV device)
N
Check AV device
N
Check input mode
Is a weak
Discharge detected
in the screen?
Y
Is LVDS connection
Correctly connected?
Y
Is waveform of CLK
in the Main PCB
Normal?
Y
Check other PCBs
and connectors
-26-
N
1.Check AC connection
2.Check Power S/W ON
3.Check other PCBs
N
Check LVD connection
Panel & P3 of Main PCB
N
Replace Main PCB
and/or Sub PCB