ViewSonic VP150M Service Manual - Page 51

Trouble, Shooting, Display

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Service Manual VP150m TROUBLE SHOOTING No DISPLAY Start ViewSonic September 2000 - Version 1.0 LED is lighted ? LED is green ? 1. Is adaptor's output +12V ? 2. Is DC Jack connector OK ? ► 3. Is DC-DC OK ? 4. Is IC18 working OK ? 5. Check LD1 ? It is in power saving 1. Check video cable 2. Is the timing supported ? 3. Check U11 if Digital 4. Check IC05 if Analog (SOG) 5. Check DDC if Digital Is backlight on? 1. Check inverter OK ? 2. W07 connector cable OK ? IC02 no data out ? IC01 no data out ? It means data to W07 1. Is J6 connected good ? ► 2. Check VLCD ? 3. Check Hsync, Vsync, CLK, DE 4. Is panel OK ? It means data from IC01 to IC02 1. Check IC01 I1C OK ? 2. Check IC01 data in 3. Check IC 01 power 1. Check IC11 if digital 2.Check power of IC11 if Digital 3. Check Digital CLK 4. Check Digital HSync, VSync, DE End Page 50 Confidential - Do Not Copy

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Service
Manual
VP150m
ViewSonic
September
2000
-
Version
1.0
TROUBLE
SHOOTING
No
DISPLAY
Start
LED
is
lighted
?
LED
is
green
?
Is
backlight
on?
IC02
no
data
out
?
IC01
no
data
out
?
1.
Is
adaptor's
output
+12V
?
2.
Is
DC
Jack
connector
OK
?
►
3.
Is
DC
-DC
OK
?
4.
Is
IC18
working
OK
?
5.
Check
LD1
?
It
is
in
power
saving
1.
Check
video
cable
2.
Is
the
timing
supported
?
3.
Check
U11
if
Digital
4.
Check
IC05
if
Analog
(SOG)
5.
Check
DDC
if
Digital
1.
Check
inverter
OK
?
2.
W07
connector
cable
OK
?
►
It
means
data
to
W07
1.
Is
J6
connected
good
?
2.
Check
VLCD
?
3.
Check
Hsync,
Vsync,
CLK,
DE
4.
Is
panel
OK
?
It
means
data
from
IC01
to
IC02
1.
Check
IC01
I1C
OK
?
2.
Check
IC01
data
in
3.
Check
IC
01
power
1.
Check
IC11
if
digital
2.Check
power
of
IC11
if
Digital
3.
Check
Digital
CLK
4.
Check
Digital
HSync,
VSync,
DE
End
Page
50
Confidential
—
Do
Not
Copy