![background image](http://html1.mh-extra.com/html/viewsonic/vg810b/vg810b_service-manual_1021231026.webp)
Check that CN251 pin1, 2 are approximately 12V
Check that FB251, FB252, F251 are 12V
Failure point
1. Power board failure.
2. Disconnected between CN251 and power board.
Check that C255 positive is at 5V.
Failure point
FB251, FB251, F251 failure
Failure point
P251, IC251, L251 failure
Check:
1. C262 is O/P 2.5V.
2. IC253 is O/P 3.3V.
Yes
Yes
Yes
No
No
No
6.1 No
power.
6. Trouble Shooting Flow Chart
23
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG810s/b
Summary of Contents for VG810B
Page 30: ...6 6 Figure of Waveform 27 ViewSonic Corporation Confidential Do Not Copy VG810s b...
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Page 53: ...10 Schematic Diagrams 50 ViewSonic Corporation Confidential Do Not Copy VG810s b...
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Page 63: ...11 PCB Layout Diagrams 60 ViewSonic Corporation Confidential Do Not Copy VG810s b Main Board...
Page 64: ...61 ViewSonic Corporation Confidential Do Not Copy VG810s b Main Board...
Page 65: ...62 ViewSonic Corporation Confidential Do Not Copy VG810s b Power Board...
Page 66: ...63 ViewSonic Corporation Confidential Do Not Copy VG810s b Control Board...