LG PB63U, Service Manual, Page: 7 / 22

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Only for training and service purposes
4.4.3. Verification of DMD light source
(1) Finish after verifying if the light source in the right side of
DMD screen in Gray Pattern – Full Gray 10 Pattern inside
DMD Check Pattern can be seen with naked eyes. (Refer
to Fig. 4-4-3-1)
( DMD Light Source Spec: It is not seen with naked eyes in
Full Gray 10 Pattern.)
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.
* Attachment )TI Reference :
DMD Handling Specification, DMD Cleaning
6. Country Adjustment and Verification
6.1. Country Adjustment Method
(1) Enter to the adjustment mode by selecting “IN-START”.
(2) Press the right arrow key in “Adjust check” to locate a
cursor on “Country Group Code”.
(3) In case of PB63U-JE, change “Country Group Code” to
“02” and press the down arrow key once to change "Coun-
try" and then press OK. (PB63U_
EBT62523101
)
(4) Press Exit to complete the adjustment.
( In case of
EBT62523101
, Change both "Country Group Code"
and "Country," then press OK.
7. EDID Data Download
7.1. Used Device
: Adjustment remote control
7.2. Adjustment Method
(1) Enter to adjustment mode with selecting "ADJ"on remote
control.
(2) Enter to "1. EDID D/L" with pressing right direction key to
get in EDID Download adjustment menu (Fig. 7-2-1)
(3) Select "START".
(4) When adjustment is completed, check RGB "OK(PCM)"
HDMI1 "OK(PCM)". (Fig. 7-2-2)
When it fails, Reset and check by trying the (3) process
again.
(5) To exit, press "ADJ" or "EXIT" of the adjustment remote
controller again to exit.
(6) To verify the adjustment result, enter EDID D/L or IN-
START and verify.
(Fig. 4-4-3-1) Verification of DMD light source
Main chassis assy P/N EBT62523101
Suffix AUS
Country US
(Fig.7-2-1) Adjustment Menu when ADJ is selected (Left)
(Fig.7-2-2) Selection Category on ADJ Adjustment Menu (Right)