ViewSonic VX800-3 Service Manual - Page 50

Show No Signal on screen, 7 Keypad can not work

Get ViewSonic VX800-3 - 18inch LCD Monitor PDF manuals and user guides
UPC - 766907812718
View all ViewSonic VX800-3 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 50 highlights

4.6 Show "No Signal" on screen (Test pattern: 32 gray 1280X1024 60HZ) Check the signal level of R610, R611, R612 is FIG 5. YES NO NO Check the HS and VS is FIG 6. and FIG 7. 4.7 Keypad can not work Failure point 1. The video connector is disconnected 2. Signal cable is disconnected Check that the cable is fully connected between the Interface board and Key board YES Failure point 1. IC400 pin 1, 4, 42, 43, 46, 47, 125,206 failure 2. TACT switch failure NO Failure point The cable is disconnected ViewSonic Corporation 56! Confidential - Do Not Copy VX800-3

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
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
ViewSonic Corporation
Confidential – Do Not Copy
VX
8
00-3