![background image](http://html1.mh-extra.com/html/viewsonic/vg500-2/vg500-2_service-manual_1021188026.webp)
No picture Appear
Does the LED
light up
LED display is
amber
Is it entering into
power saving mode
Restart PC signal
to ensure H. V.
sync are not
absent
End
Reset the Scaling IC
(U005 and U001) by
pushing the power
key or re-plugging the
DC 12V cable
Scaling IC (U005)
Hangs
No
ReplaceU001
End
End
The Voltage across
C801 is 12V
Replace F801
Check O/P of U801 at
pin7,
pin10
Replace U801
The Voltage at
L802 O/P is 5V
Replace U802
The Voltage across
Q702 is 5V
Replace Q702
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Picture
shows
Still no
Picture
No
No
Next
Replace U004
Yes
Check U004
No
Replace U009
Yes
Check U009
No
Yes
Replace U001
ReplaceU005
MASCOT V2
Still no
Picture
!
!
ViewSonic Corporation
23
Confidential
– Do Not Copy
VG500-2
6. Trouble Shooting Flow Chart
Summary of Contents for VG500-2
Page 25: ...Zfbs0Xfflt 3114012 Tfsjbm Op 11112 ViewSonic Corporation 22 Confidential Do Not Copy VG500 2...
Page 53: ...TP TP TP TP ViewSonic Corporation Confidential Do Not Copy VG500 2 50...
Page 54: ...ViewSonic Corporation 51 Confidential Do Not Copy VG500 2 11 PCB Layout Diagrams...
Page 55: ...ViewSonic Corporation 52 Confidential Do Not Copy VG500 2...