Adjustment Instruction - LG RU-44SZ80L Service Manual

1. Application Object
This instruction is for the application to the LCD projection
TV(MB-042B Chassis).
2. Notes
(1) The use of an isolation transformer is not needed although it
may be desired to protect test equipment.
(2) The adjustment must be performed under the correct
sequence.
(3) The adjustment must be performed in the circumstance of
25!5°C of temperature and 65!10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 120V, 60Hz in
adjusting.
(5) The set must be operated for 15 minutes preliminary before
adjustment if there is no specific designation.
The preliminary operation must be performed using 100%
white pattern, but reception of the moving picture may also be
possible in unavoidable case.
3. Composition of Adjustment Mode
(1) All adjustment mode are entered by pressing the ADJ key on
the service remote control, after adjustment press the ADJ key
to exit.
(2) Composition of adjustment mode: The first screen composi-
tion of pressing ADJ key.
EZ ADJUST
1. M62352
2. Position
3. AD9883A-set
4. GAMMA
5. Uniformity
6. CONTRAST
7. RGB Alignment
8. System Option
9. Lamp Replace
(Fig. 1) The First Screen of Adjustment Mode
(3) Select menu to adjust(turn to yellow) with using (CH+(D),
CH-(E)) key above screen and press the enter key to adjust
on the desired menu.
(4) After accessing the SUB menu, select the item to be adjusted
by using (CH+(D),CH-(E)) key and adjust the value of adjust-
ment with using the volume +(F),volume - (G) key.
(5) Press the ADJ key to exit the adjustment menu.
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ADJUSTMENT INSTRUCTIONS
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4. NRS Adjustment
When the LCD panel load data on regular pixel using high speed
charge/discharge with sample & holder, the drain width of TFT
gradually decreases and the non-resistance increases, and
comes out regular noise on screen(shows vertical line by 12
pixel)
This NRS signal is enforced charge/discharge signal so that the
ON/OFF time of TFT mode quickly before starting active video
signal, H/L level adjustment is possible to each R, G, B.
5. Screen Position Adjustment
(Horizontal/Vertical Position Adjustment)
5-1. Required Test Equipment
Remote control for adjustment
5-2. Preparation for Adjustment
(1) Connect a power source with TV Set and turn TV Set on.
(2) Do heat run for 15 min or more before adjustment.
(3) Receive the main/sub signal 13CH by split screen.
(4) Adjust screen ratio to 16:9 by pressing ARC Key.
5-3. Horizontal Position Adjustment
(1) Press ADJ key on the remote control to enter the adjustment
mode.
(2) Select 2. Position.
(3) Select H_Position by using the channel key in adjust mode.
(4) Adjust data by using the Volume key on the remote control in
order to be left/right symmetry screen. (Three blocks of the
most outer block must be located in the most outer block.)
(Refer to Fig. 3)
5-4. Vertical Position Adjustment
(1) Select V_Position with channel key in adjust mode.
(2) Change the data to become symmetrized on the top and bot-
tom of the screen(refer to Fig. 2) by pressing the Volume key
on Remote Control.
(Fig. 2) Adjustment for Horizontal/Vertical Position on Screen