ViewSonic E50C Service Manual page 30

Troubleshooting
5-2 No Raster (Sound OK)
Check
Fusible Resistance
Abnormal
Check
voltage of
heater
Normal
Check
CRT and FBT
Normal
Check / Replace
IC201
5-2
No Raster
(Sound OK)
Check
Normal
RK,GK,BK Signal
output from
CRT PCB
Abnormal
Check
the signal output
from IC201 Pin
63
Abnormal
Check tuner B+
and Main CVBS
Check
Abnormal
R.G.B Signal
input to CRT PCB
Abnormal
Check
R.G.B Signal
Output from
IC201
Normal
Check
Q202, Q203, Q204,
Q207, Q209, Q213,
Q206, Q208, Q210
Check
the fusible resistance
of abnormal volatge line
Abnormal
Check
Normal
B+
(200V, 16V)
Normal
Check
Q501 and re-adjust
Screen Voltage
Samsung Electronics