LG HS200 Service Manual page 6

(4) Final Adjustment
Repeat the adjustment of (1), (2) and (3) 2 times to find the
optimal location and check whether there are any parts
where the illuminator misses with the naked eye. Find the
lighting location where the brightness of the illuminator is
the brightest to measure the brightness (CL-200), and
inspect for any alien particles and focus line width (refer to
below picture). Then fixate the adjustment screw of the
illuminator.
* Focus inspection method and item
1) Test pattern : Green cross-hatch
2) Set the best focus based on the center of the screen.
3) The focus line width must satisfy the below criteria by
zone. (There must be no dual line)
4-2. Illuminator Phenomenon Adjustment
Adjustment Screw
part direction
Right
(tighten
direction)
Up/down
screw A
Left
(loosen
direction)
Right
(tighten
direction)
left/right
screw B
Left
(loosen
direction)
Right
(tighten
direction)
left/right
screw C
Left
(loosen
direction)
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Illuminator goes down direction
Screen state
Initial state State after adjusting
- 6 -
Zone 1
Line width[mm] 2.0 mm
Focus Examination domain
Illuminator goes down area
At first, upside illuminator goes down
and right illuminator also goes down in
detail.
At first, downside illuminator goes
down and left illuminator also goes
down.
At first, left illuminator goes down and
downside illuminator also goes down.
At first, right illuminator goes down and
upside illuminator also goes down.
At first, left illuminator goes down and
downside illuminator also goes down.
At first, right illuminator goes down and
upside illuminator also goes down.
Zone 2 Zone 3 Zone 4
2.3 mm 2.8 mm 2.8 mm
Description
LGE Internal Use Only