Checking The Scaling Ic Operation - NEC AccuSync LCD51VM Series Service Manual
Color monitor
Hide thumbs
Also See for AccuSync LCD51VM Series:
- User manual (98 pages) ,
- Dimensional drawing (1 page) ,
- Service manual (129 pages)
Table of Contents
7. Checking the Scaling IC Operation
Is there +3.3V supplied on U405 pins 14, 30, 90, 104, 106, 108, 110, 113,115, 124, 128, 132,
136, 143, 157? Is there +2.5V supplied on U405 pins 20, 43, 46, 59, 61, 63, 74, 77, 79, 98,
117, 119, 138?
NG
OK
Is 14.318M Hz clock input to U405 pins 102,
103 at TTL level?
NG
OK
U405 failure.
Proceed section 8 "No Power On".
Is 14.318M Hz clock output from X401 at TTL level?
OK
Failure point
X401 failure
6-10
Chapters
Table of Contents
