LG RT-52SZ31RB, Service Manual

Page: 16 / 52

6-2. Screen Position Adjustment
(1) Required Test Equipment
A remote control of adjustment
(2) Preparation for Adjustment
1) Turn on TV and press the EYE key on service remote.
2) Display pattern <Fig 6> as same as screen tilt & keystone
adjustment.
(3) Adjustment Sequence
1) Adjust the horizontal position as change the data to
symmetrized Left/Right of above pattern using the
VOL+(
G
) VOL-(
F
) key on the service remote.
2) Adjust the horizontal position as change the data to
symmetrized Up/Down of above pattern using the CH+(
D
)
CH-(
E
) key on the service remote.
3) After finishing the adjustment, receive the PAL-B/G Digital
pattern (EU-05CH) to check the status of adjustment.
6-3. Component Offset Adjustment
(1) Required Test Equipment :
A remote control for adjustment, 801GF
(2) Preparation for Adjustment
1) Connect a power source with TV Set and turn TV set on.
2) Do Heat-Run for 15 minutes and over before adjustment.
3) Receive the Component 1 or 2.
4) Receive the 720P, HozTVBar Pattern of 801GF(Fig 7).
(3) Offset Adjustment
1) Press Adjust key on the remote control to enter the
adjustment mode after more than 10 seconds of receiving
the signals.
2) Press “4.AD9883 Adjust” to adjust.
3) When the OSD of “AD9883 Adjust End” appeared and
disappears,The adjustment is completed
(4) Component & RGB Mode White Balance passivity
adjustment
1) After inputting the 16 Gray pattern (RGB or Component),
check the White Balance status of Low Level (2-6 Gray
Level).
2) After Pressing the IN-START key of remote control, select
the AD9883 and press the
G
key. - Red Offset, Blue Offset
is able to adjust.
3) After selecting the adjustment mode with the channel key,
adjust Red Offset, Blue Offset value with the volume key to
adjust passively white Balance in Low Level.
adjustment limit : Red Offset - +/-2 step
Blue Offset - +/-4step
6-4. White Balance & Gamma Adjustment
(1) Required Test Equipment
1) CA100 : 1EA
-> Measure colour of projecting screen center
[CA-110(name of model) is possible to measure White
Balance and Gamma - leave it 20Cm from screen center
Follow a measurement machine manual to set CA -100
and CA - 110 measurement machine.]
2) pattern Generator : 1EA -> 16 step Gray Pattern, 64 step
Gray Pattern
3) SET Fixation Stand : 1EA
4) Remote control : 1EA
5) Circuit thing Jig for adjustment (Except Drive Board Assy of
adjustment model)
--- Programmed Digital Board so that the VDP Test Pattern
can output white signal by 1 level from 0 to 255 level.
(2) Equipment composition : Follow <Fig 2>
Adjust at same condition of equipment composition diagram.
(3) Preparation for Adjustment
Compose the equipment follow Fig.2 and place the set on the
fixation stand.
1) Select the VDP Test Pattern signal to R1, G1, B1.
2) Press the Adjust key to select 62352 and then select
RVREF, GVREF, BVREF in adjust mode
3) Adjust the luminance of CA100 to be below 0.75Cd by
volume key.(Range : 196~ 202)
4) Exit adjustment mode by pressing Adjust key.
5) Press the IN-START key on the remote control and select
the 7050 RGB Set of adjustment mode and then press the
G
key.
6) Check the data value of R contrast, G contrast, B contrast
is 515, Otherwise set the data 515 by using volume key.
(4) Adjustment Sequence
1) Output 255,255,255 signal of VDP TEST PATTERN, then
display maximum WHITE PATTERN on screen.
2) Gamma Adjust Mode is display as below when select
Gamma adjust by pressing ADJ key on remote control.
- 16 -
<Fig 7. 720P HozTVBar Pattern>
<Fig 6. Eye Pattern-Tilt/ keystone & H.V Position adjustment>
[EU 05 CH]
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