NO POWER
D
Use multi-meter to measure
& turn on system
12V ok ?
5V ok ?
3.3V/2.5V
ok ?
Yes
Yes
Remove adapter
Measure adapter only
Adapter ok
Change adapter
M12V to
GND
Yes
No
Remove
FB4/FB7/D33
No
5V ok ?
Yes
No
+5V short to
GND or 3.3V
+12V->5V
regulator CKT no
work
No
3.3V/2.5V short
to GND
MCU 3.3V bad
Yes
PC 5V/DC 3.3V
CKT not correct
13
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG510b/s
Содержание VLCDS27955-1W
Страница 8: ...5 ViewSonic Corporation Confidential Do Not Copy VG510b s 3 Front Panel Function Control Description ...
Страница 26: ...23 ViewSonic Corporation Confidential Do Not Copy VG510b s ...
Страница 36: ...11 PCB Layout Diagrams Main Board 33 ViewSonic Corporation Confidential Do Not Copy VG510b s ...
Страница 37: ...Control Board 34 ViewSonic Corporation Confidential Do Not Copy VG510b s ...