Hitachi CP-X940E, Руководство по обслуживанию

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PJL1035-2
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.
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
Don't touch
this screw.
a screw on
P.O.filter-B
a screw on
P.O.filter-G
P.O.filter-B
P.O.filter-B
PWB ass'y DRIVE
Screw driver
Screw
Screw
P801
P701
P901
Fig.4-3-(a) Top view of P.O.filters Fig.4-3-(b) How to tighten screws
Caution: Avoid damaging LCD
panels or their cables.