LG PE/PL-43, Service Manual, Page: 12 / 73

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High Voltage Regulation Adjustment
1. Test Equipment
Digital Multi-Meter(DMM)
2. Preliminary steps
1) Switch picture mode to STANDARD in no signal input.
3. Adjustment
1) Connect “+” terminal(Red) of DMM to the Anode of D432
and “-” terminal(Black) to the Heat Sink of Q406.
2) Adjust VR401 so that the D432 terminal voltage is
21.3
!
0.1V.
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CUT-OFF Adjustment
1)
Press the “SVC” button and then press the “ ” button on
the remote controller for adjustment to display horizontal
line
.
(Even though you enter into the SVC mode, the
horizontal line might not be seen according to the position
of Screen Volume.)
2)
Adjust Screen Volume (R/G/B) in Focus Pack until
brightness of red/blue/green horizontal line is about not to
be seen.(At this moment, brightness of red, blue or green
horizontal line should be equal to one another.)
3) Exit the adjustment mode by pressing the “ ” button.
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Deflection Adjustment
1. Preliminary steps
1) Adjust differently based on input signal such as NTSC or
PAL.
2) NTSC adjustment should be done in STANDARD mode of
picture after receving 13CH signal,and PAL adjustment
should be done in STANDARD mode of picture after
receving EU05 CH.
3) Reset the data in convergence adjustment mode,quit the
mode.
Convergence Mode : SVC,
Data reset : 5 , OK
Adjustment mode out :
2. PAL Mode Deflection Adjustment
1) At SVC mode,press the YELLOW key get into the deflection
adjustment mode.
2) VS (Vertical Shift)
Adjust until geometric vertical certer line of the screen is
accord with the vertical center line of the screen JIG at EU
05 CH by pressing the VOLUME
F
,
G
button.
3) VA (Vertical Amplitude)
Adjust until fifth vertical line from upper and lower center of
the screen is accord with the edge of the frame.
4) HS (Horizontal Shift)
Adjust so that the horizontal center line of a digital circle pattern
is in accord with geometric horizontal center of the CPT.
5) EW (East-west Width)
Adjust until the outermost left and right vertical line of the
screen is accord with the edge of the frame.
6) EP (East-west Parabolar)
Adjust so that middle portion of the outermost left and right
vertical line looks like parallel with vertical lines of the CPT.
7) ET(East-west Trapezium)
Adjust to make the length of top horizontal line same with it
of the bottom horizontal line.
8) A-ANG(AFC Angle)
9) A-BOW(AFC BOW)
10) U-C(Upper Cotner Pincushion)
11) L-C(Lower Cotner Pincushion)
12) U-VL(Upper Vertical Linearity)
13) L-VL(Lower Vertical Linearity)
14) VL (Vertical Linearity)
Adjust so that the boundary line between upper and lower half is
in accord with geometric horizontal center of the CPT.
15) SC (Vertical “S” Correction)
Adjust so that all distance between each horizontal lines are
to be the same.
16) V-ASP(Vertical Aspect Ratio)
Adjust the vertical aspect ratio.
17) Store the adjusted data in EEPROM by pressing the “OK”
button before exiting adjustment mode.
18) Restore the convergence correction data by pressing the
“TV/AV” button before exiting adjustment mode
3. NTSC Mode Deflection Adjustment
1) Adjust vertical size (VA Adjustment) until fourth vertical bar
from upper and lower center screen is accord with the edge
of the frame.
2) Adjust horizontal size (EW Adjustment) until third bar to
indicate horizontal size of circle is accord with the edge of
the frame.
3) Do other adjustments the same as in PAL mode.
Fifth Vertical Line
Outmost Vertical Line
Fourth Vertical Line
Third Bar
M M
M M