LG RD-JT91 Service Manual page 15

4-3. Illuminator Phenomenon Adjustment
Adjustmen Screw
t 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)
5. Caution for DMD
(Digital Micro-mirror Device)
5-1. Caution for DMD ESD
(1) Connector the grounding to prevent a damage of ESD
(Electrostatic Discharge) when handing the DMD.
(2) Wear a wrist strap to connect the ESD grounding in flesh
necessarily.
(3) Connect the ESD ground to workstation and an electric
conductor.
(4) Save the DMD after getting rid of a static electricity. Keep
it at an exclusive case when moving it When grounding,
open the case.
(5) Put on gloves for preventing static electricity.
(6) All work is done at static free location. Attach the tape or
remove a dust on the DMD front or DMD back pin
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Illuminator goes down direction
Screen state
Initial state State after adjusting
- 15 -
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.
5-2. Caution for DMD Clean
(1) Follow the procedure and caution to prevent the screen
from being scratched.
(2) When DMD glass stains with dust, polish the front and
back DMD glass with soft cloth. Then, do it again after
rotating 180 degree the DMD. If necessary, keep under
observation.
(3) Don't clean the DMD with the high pressure. The static
electricity and pressure will damage the DMD.
Description