LG RD-JT91, Service Manual

Page: 15 / 34

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
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.
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Up/down
screw A
Right
(tighten
direction)
Adjustmen
t part
Screen state
Initial state State after adjusting
Screw
direction
Description
At first, upside illuminator goes down
and right illuminator also goes down in
detail.
Left
(loosen
direction)
At first, downside illuminator goes
down and left illuminator also goes
down.
left/right
screw B
Right
(tighten
direction)
At first, left illuminator goes down and
downside illuminator also goes down.
Left
(loosen
direction)
At first, right illuminator goes down and
upside illuminator also goes down.
left/right
screw C
Right
(tighten
direction)
At first, left illuminator goes down and
downside illuminator also goes down.
Left
(loosen
direction)
At first, right illuminator goes down and
upside illuminator also goes down.
4-3. Illuminator Phenomenon Adjustment
Illuminator goes down direction Illuminator goes down area