![background image](http://html1.mh-extra.com/html/viewsonic/vg910b-1/vg910b-1_service-manual_1021237029.webp)
6.4
Show “No signal” on screen.
Check that signal level of R612, R613, R614, R641, R642, R643, R644, R645, R646, R647, R648
Check the Hsync and Vsync
Failure point
1. IC401 failure.
2. Signal cable is disconnected.
Yes
No
No
6.5
Keypad cannot work.
Check the the cable is fully conneted between the interface
board and key board
1. D305, D306 ~ D311, D312 failure.
2. TACT switch failure.
Failure point
The cable is disconnected.
Yes
Failure point
No
26
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG910s/b
Summary of Contents for VG910b-1
Page 30: ...6 6 Figure of Waveform 27 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 31: ...28 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 51: ...48 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 52: ...49 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 53: ...50 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 55: ...52 ViewSonic Corporation Confidential Do Not Copy VG910s b 10 Schematic Diagrams ...
Page 56: ...53 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 57: ...54 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 58: ...55 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 59: ...56 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 60: ...57 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 61: ...58 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 62: ...59 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 63: ...60 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 64: ...61 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 65: ...62 ViewSonic Corporation Confidential Do Not Copy VG910s b 11 PCB Layout Diagrams Main Board ...
Page 66: ...63 ViewSonic Corporation Confidential Do Not Copy VG910s b Main Board ...
Page 67: ...64 ViewSonic Corporation Confidential Do Not Copy VG910s b Power Board ...
Page 68: ...65 ViewSonic Corporation Confidential Do Not Copy VG910s b Control Board ...