![background image](http://html1.mh-extra.com/html/viewsonic/vx900-2/vx900-2_service-manual_1020039052.webp)
!
6. Show “No Signal” on screen
( Test pattern: 32 gray 1280X1024 60HZ )
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
8
ViewSonic Corporation
Confidential – Do Not Copy
VX900-2
Summary of Contents for VX900-2
Page 58: ...6 Mechanical Assembly 64 ViewSonic Corporation Confidential Do Not Copy VX900 2...
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Page 63: ...69 ViewSonic Corporation Confidential Do Not Copy VX900 2 7 Explode Diagram...
Page 64: ...Sechmatic Daigrams 6 ViewSonic Corporation Confidential Do Not Copy VX900 2...
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Page 70: ...PCB Layout 77 ViewSonic Corporation Confidential Do Not Copy VX900 2...
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