Service manual

6. TROUBLE SHOOTING FLOW CHART
Does
picture
display?
YES
NO
Back-light
On or off
Check
Power
LED
A dark
Picture or a
Picture full
Of colorfully
vertical lines
Check
Display
resolution
Check inverter
Check I/F board JP1
Check I/F board JP9
Check panel connector
Check I/F board
OSD no respones
too dim
The brightness is
different between
upper side and
downer side
partly picture
without color
Vertical,Horizontal
none
synchronousness
a few of colorfully
vertical lines
even(or odd)
vertical lines is dark
Check SW board
SW1 ~ SW4
Check OSD
adjustment
Check inverter of power board
Check backlight
Check I/F board
Check LCD panel
Check L
CD panel
Check I/F board
(DPWBN5625T89
-
H
-
)
Check SW board JP1
Check inverter
Check I/F board
OFF
ON
ON
Hsync
Vsync
or DE error
Flash
RGB
Signal
error
H,Vsync
error
34
ViewSonic Corporation Confidential
-
Do Not Copy Q9-1_Q9b-1