![background image](http://html1.mh-extra.com/html/viewsonic/vx800-3/vx800-3_service-manual_1020035047.webp)
4.3 No Display on Screen (LED is green)
NO
YES
NO
Is the backlight lit?
Check that the cable is fully
connected to CN500
Check that the cable is fully
connected between the
Inverter and Interface board
Check IC500 ,IC501
Pin47 (FIG.13)
Pin48 (FIG.14)
Pin39 (FIG.15)
Pin40 (FIG.16)
Failure point
The cable is
disconnected
Failure point
The cable is disconnected
Check CN301 pin1 is12V,
pin5 is 5V
Check IC502
Pin 2, 4 is low
voltage
Failure point
1. IC500, IC501 failure
2. IC400 failure
Inverter failure
YES
YES
NO
YES NO
YES
NO
YES
Check IC502
Pin5, 6, 7, 8 is
About 5V
IC502 failure
NO
IC502 failure
NO
IC400 Pin 114 failure
5
3
!
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...
Page 64: ...59 ViewSonic Corporation Confidential Do Not Copy VX800 3...
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Page 68: ...63 ViewSonic Corporation Confidential Do Not Copy VX800 3...
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...