SERVICE MANUAL
PAGE:
13
TROUBLE SHOOTING
Is OSD OK?
Check
IC271 =1.8V Reg
IC272 =3.3V Reg
pin #32,39
H.V Sync OK?
YES
IC201
Each and all
v ideo Input Check
Pin #78,80,82
=component
96 = RF CVBS
97 +A/v
100,102 =YC
NO
YES
Check IC101
Pin #378(clock)
Pin #326,301(Sync)
OK?
Check IC402
Pin #1,9,17,26,34,44
(v cc)
pin #31 =(Clock)
OK?
YES
NO
NO
Check
IC271,272 DC Reg
In/OuT Power Line
Fasten P441
Cable & Connector
YES
YES
Check
AL201 ~206&
A;L208 ~210 Oof
IC201Video Data out
OK?
NO
NO
Check External
Video Soure
Replace IC201
Summary of Contents for LC3050
Page 24: ...SERVICE MANUAL PAGE 22 PCB LAYOUT CONTROL PCB 1 TOP COMP PATTERN 2 BOTTOM COMP PATTERN ...
Page 25: ...SERVICE MANUAL PAGE 23 PCB LAYOUT Main PCB TOP COMP ...
Page 26: ...SERVICE MANUAL PAGE 24 PCB LAYOUT Main PCB TOP PATTEN ...
Page 27: ...SERVICE MANUAL PAGE 25 PCB LAYOUT Main PCB BOTTOM COMP ...
Page 28: ...SERVICE MANUAL PAGE 26 PCB LAYOUT Main PCB BOTTOM PATTEN ...
