Samsung PLK405WX/XAC Service Manual page 43

Troubleshooting
6-12 No Picture
6-8
Lamp ON?
Yes
Check
the voltage output from the
Power Board
Yes
Check
the voltage on
the Main Board
Yes
Check M-Y-O,
M-C-O, S-Y-O, S-C-O output from
the AV S/W Board (H006)
Yes
Check R-out,B-out,
G-out, HV-BLK, 2H-SYNC,
V-SYNC output from the Proscan
Board (H006)
Yes
Check
the signal output from ICL106,
107,108 pin 5
Yes
Check R,G,B
signal output to ICL204
(CXA1853) pin15,
16,17
Yes
Check R,G,B
signal output to ICL205
(CXA2504N) pin 23,25,27,
33,35,37
Yes
Check the terminal
(connected to LCD panel)
No
See Lamp
Display Check
No
See No Power
No
Check/Replace
abnormal components
No
Check AV S/W Board
(H006) and comb filter
No
Check Proscan
Board (H007)
No
Check
ICL106,107,108
No
Check ICL204
No
Check ICl205
Samsung Electronics