ViewSonic PJL1035 Service Manual - Page 12

P.O.filters.

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4 - 2 P.O.filter adjustment. Before adjusting, input the 0.0Vp-p signal to check the black image. If the image is not as dark as other set, continue this procedure. 1. Make sure the AC power cord is unplugged. 2. Remove the PWB ass'y DRIVE and the DUST COVER. 3. Loosen the screws on P.O.filters for GREEN and RED. (See Fig.4-3-(a).) Remark: Don't touch the screw on the P.O.filter for BLUE. 4. Put back the PWB ass'y DRIVE where it belongs without screws and make connections with peripheral devices. Then get on the projector. 5. Use the XGA VESA(60) timing signal to Input 0.0Vpp black pattern. PJL1035-2 6. Slide the P.O.filter for GREEN on its base to find out where a whole image is darkest by visual check. At the best position, tighten the screw a little so that the filter cannot shift. (See Fig.4-3-(b).) 7. Slide the P.O.filter for RED on its base in order to get rid of the reddish tint of the image by visual check. After finding out the best position, tighten the screw in a little order not to change the color of the image. (See Fig.4-3-(b).) 8. Remove the PWB ass'y DRIVE again to tighten up the screws of both P.O.filters. 9. Put on the DUST COVER and the PWB ass'y DRIVE and make original connections with all of peripheral parts. 10. Reinstall the UPPER CASE and tighten all screws. LCD panels PROJECTION LENS a screw on P.O.filter-B on't touch this screw P.O.filter-B P.O.filter-B a screw on P.O.filter-G Fig.4-3-(a) Top view of P.O.filters Caution: Avoid damaging LCD\ panels or their cables.y Screw driver P801 Screw P701 Screw PWB ass'y DRIVE P901 Fig.4-3-(b) How to tighten screws ViewSonic Corporation _Li 9 _ Confidential - Do Not Copy

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PJ
L1035-2
4
-
2
P.O.filter
adjustment.
Before
adjusting,
input
the
0.0Vp-p
signal
to
check
the
black
image.
If
the
image
is
not
as
dark
as
other
set,
continue
this
procedure.
1.
Make
sure
the
AC
power
cord
is
unplugged.
2.
Remove
the
PWB
ass'y
DRIVE
and
the
DUST
COVER.
3.
Loosen
the
screws
on
P.O.filters
for
GREEN
and
RED.
(See
Fig.4-3-(a).)
Remark:
Don't
touch
the
screw
on
the
P.O.filter
for
BLUE.
4.
Put
back
the
PWB
ass'y
DRIVE
where
it
belongs
without
screws
and
make
connections
with
peripheral
devices.
Then
get
on
the
projector.
5.
Use
the
XGA
VESA(60)
timing
signal
to
Input
0.0Vpp
black
pattern.
LCD
panels
on't
touch
this
screw
PROJECTION
LENS
a
screw
on
P.O.filter-B
P.O.filter-B
P.O.filter-B
a
screw
on
P.O.filter-G
Fig.4-3-(a)
Top
view
of
P.O.filters
6.
Slide
the
P.O.filter
for
GREEN
on
its
base
to
find
out
where
a
whole
image
is
darkest
by
visual
check.
At
the
best
position,
tighten
the
screw
a
little
so
that
the
filter
cannot
shift.
(See
Fig.4-3-(b).)
7.
Slide
the
P.O.filter
for
RED
on
its
base
in
order
to
get
rid
of
the
reddish
tint
of
the
image
by
visual
check.
After
finding
out
the
best
position,
tighten
the
screw
in
a
little
order
not
to
change
the
color
of
the
image.
(See
Fig.4-3-(b).)
8.
Remove
the
PWB
ass'y
DRIVE
again
to
tighten
up
the
screws
of
both
P.O.filters.
9.
Put
on
the
DUST
COVER
and
the
PWB
ass'y
DRIVE
and
make
original
connections
with
all
of
peripheral
parts.
10.
Reinstall
the
UPPER
CASE
and
tighten
all
screws.
Caution:
Avoid
damaging
LCD\
panels
or
their
cables.
y
Screw
driver
P801
Screw
PWB
ass'y
DRIVE
P701
P901
Fig.4-3-(b)
How
to
tighten
screws
Screw
ViewSonic
Corporation
_Li
9
_
Confidential
-
Do
Not
Copy