4.6 Show “No Signal” on screen
(Test pattern: 32 gray 1280X1024 60HZ)
4.7 Keypad can not work
Check the signal level of R610,
R611, R612 is FIG 5.
YES
Check the HS and VS is
FIG 6. and FIG 7.
NO
YES
NO
NO
Check that the cable is
fully connected between
the Interface board and
Key board
Failure point
The cable is disconnected
Failure point
1. IC400 pin 1, 4, 42, 43, 46,
47, 125,206 failure
2. TACT switch failure
Failure point
1. The video connector is disconnected
2. Signal cable is disconnected
5
6
!
ViewSonic Corporation
Confidential – Do Not Copy
VX
8
00-3
Summary of Contents for VX800-3
Page 56: ...6 Mechanical Assembly 62 ViewSonic Corporation Confidential Do Not Copy VX800 3...
Page 57: ...63 ViewSonic Corporation Confidential Do Not Copy VX800 3...
Page 58: ...64 ViewSonic Corporation Confidential Do Not Copy VX800 3...
Page 59: ...BASE ASSEMBLY 65 ViewSonic Corporation Confidential Do Not Copy VX800 3...
Page 60: ...66 ViewSonic Corporation Confidential Do Not Copy VX800 3 TAPE...
Page 62: ...7 Schematic Diagrams 57 ViewSonic Corporation Confidential Do Not Copy VX800 3...
Page 63: ...58 ViewSonic Corporation Confidential Do Not Copy VX800 3...
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Page 69: ...8 PCB Layout ViewSonic Corporation Confidential Do Not Copy VX800 3 64...
Page 70: ...ViewSonic Corporation Confidential Do Not Copy VX800 3 76...
Page 71: ...77 ViewSonic Corporation Confidential Do Not Copy VX800 3...