START
Use Analog Native mode
(Window Pattern )
Picture
visible?
Yes
No
A
Backlight
on?
On
Off
Power LED
Green LED &
key pad work?
Yes
No
(1)Panel no power
(2)Panel cable not connected
(3)H/V sync process to panel
(1)Check Scaler H/V sync correct?
(2)Measure at Scaler side
Check Inverter
Green
Check H/V sync
at 7414 output
Orange
Check Scaler
OK
(1)Scaler no power
(2)Scaler changed no OSC
Abnormal
Check input source
Check 7414
Green + Orange
Check DC power
12V,5V,3.3V,2.5V
,MCU 3.3V
Check MCU
crystal
Check MCU or
Reprogram MCU
B
6.
Trouble Shooting Flow Chart
9
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG510b/s