Advertisement
ViewSonic Corporation
E771-4
6-4 No Vertical Scan (Raster is one horizontal line)
No Vertical Scan
Check 1301 voltage o
pin3 is 12V, pin7
is 48V?
Ckeck or replace
I301.
Check
pin 6 O/P waveform at
I301
Abnormal
Replace 1301
Normal
Check
pin 1, 2, 9 of 1301
waveform
Still no vertical scan
Check or replace CRT
| Page 24
Confidential - Do Not Copy
Advertisement
