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ViewSonic Corporation
E771-4
6-7 R.G.B. Video Amplifier Abnormal
RGB Video AMP Abnormal
Check
waveform а! 1501 pin 16, 19
and 22
Check or replace the
Ne
signal cable or 1501
Yes
Check
0963, 0903, Q933 collector
voltage and wave form
No
Check Q964,
0904, 0934
Yes
Video signal present at the
pin of the CRT R.G.B.
Cathode
Defective cut-off circuit
(DC restore)
| Page 26
Confidential - Do Not Copy
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