LG RT-44NZ31RB Service Manual page 13

Centering Magnet Adjustment
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1. Preliminary steps
1) Tune the TV set to receive a EU 05 CH.
(No PR.1:PAL B/G 175.25MHz)
2) Press ÒIN-STARTÓ key on the remote controller and select
Ò0.DEFLECTIONÓ to use numeric key or move the cursor.
3) If you select the adjustment mode, automatically reset
the convergence and finished adjustment preparation
by display of EU05 CH.
2. Adjustment
1) Operate adjustment about Red,Green,Blue centering
magnet. Magnet of Green centering is located center.
2) SGS-THOMSON Convergence assy
Adjust until the center of blue signal is shifted up to 30mm¡ 3
left from that of green signal and center of red signal is
shifted up to 30mm¡ 5 right from that of green signal with
turning the centering magnet.
3) After adjustment, exit the RASTER adjustment mode by
pressing ÒENTERÓ key and then press ÒIN-STARTÓ key to
exit in SVC adjustment mode.
High Voltage Regulation Adjustment
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1. Test Equipment
Digital Multi-Meter(DMM)
2. Preparation for Adjustment
Press ÒIN-STARTÓ key on the remote controller and then select
Ò1.HIGH VOLTAGEÓ by numeric key or cursor
(Set luminosity/light and shade of no AV signal for Zero(0) in
manual adjustment)
3. Adjustment
1) Connect Ò+Ó terminal(Red) of DMM to the P415 of the
Deflection PCB, [+] and the Ò-Ó terminal(Black) to the P416
,[-].
2) Adjust VR401 so that the voltage of P415(+), P416(-) to be
25000V voltage.(Come under high voltage 31.5KV)
3) After adjustment,press any key to exit in high voltage
adjustment mode and IN-START key to exit in SVC
adjustment mode.
CUT-OFF Adjustment
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1.Preliminary steps
1) Select of AV1 (no signal)
2) Test Equipment: Oscilloscope, 100:1 Probe
2.Adjustment
1) Connect Oscilloscope to R910R/G/B,
Connect GND to heat sink of R/G/B board.
2) Turning Screen Volume (R/G/B) in Focus Pack and adjust
R/G/B is 170!0.5V.
Deflection Adjustment
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1. Preliminary steps
1) NTSC mode should be adjusted after adjusting PAL mode.
2) NTSC adjustment should be done in standard mode of
picture after receiving NTSC 13CH signal or MULTI 48CH
signal,and PAL adjustment should be done in standard mode
of picture after receiving EU05 CH.
3) Press ÒIN-STARTÓ key on the adjustment remote controller
and select Ò0.DEFLECTIONÓ
4) Display only the Green raster using lens covers to block Red
and Blue.
2. PAL Mode Deflection adjustment
D E
Use the ÒCH ,
then adjust ÒVOL
1) H POSI (Horizontal Shift adjustment)
Adjust until the geometric horizontal center line is accord with
the horizontal center line of screen JIG.
2)V POSI (Vertical Shift adjustment)
Adjust until the geometric vertical center line is accord with
the vertical center line of screen JIG
3) H SIZE (Horizontal SIZE adjustment)
The third column of horizontal size mark in outside angle of
circle is accord with the edge of frame.
4) V SIZE ( Vertical SIZE adjustment)
Adjust until 7th vertical bar from upper and lower center of
the screen is accord with the last point of the frame.
5) UP VLI (Upper vertical Linearity adjustment)
Adjust vertical linearity of upper screen.
6) LO VLI (Lower vertical Linearity adjustment)
Adjust vertical linearity of lower screen.
7)PIN PH (Horizontal trapezoid fixation)
Adjust to make the width of top horizontal line same with it of
the bottom horizontal line.
8) PIN AM (Horizontal PARABOLA correction)
Adjust so that middle portion of the outermost left and right
vertical line looks like parallel with vertical lines of the center
screen.
9) V LIN (Vertical linearity adjustment)
Adjust the screen vertical size to be same
10) S CORRE (S correction)
Adjust so that all distance between each horizontal lines are
to be same.
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Ó key to selection of the below each mode and
F G
, Ó key
The 7th Vertical Line