Read Sharp LC-20VM2E (serv.man2) Service Manual online
18
LC-20VM2E
LC-121M2E
LC-150M2E
LC-150M2E
4
RGB Contrast adjustment
1. Input the test pattern to RGB.
1. Adjust RGB CONTRAST so as to
(RGB CONTRAST Item)
2. Connect the oscilloscope to TP821
get 2.5
±
0.1Vp-p between the 100%
(IC316, pin7, G output).
white and GND.
5
RGB R DRIVE adjustment
1. Input the test pattern to RGB.
1. Adjust so as to get 100% white level
(RGB R DRIVE Item)
2. Connect CH1 of the oscilloscope to
identical with that of green.
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).
6
RGB B DRIVE adjustment 1. Input the test pattern to RGB.
1. Adjust so as to get 100% white level
(RGB B DRIVE Item)
2. Connect CH1 of the oscilloscope to
identical with that of green.
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
6-6-9. Finished adjustment
(1)N358 finished adjustment
(1)N358 finished adjustment
Adjustment
Adjusting conditions
Adjusting method
1
Confrontation bias
1. A confrontation adjustment pattern is
1. It is adjusted so that the flicker of the
adjustment
displayed.
image plane may stop in the
(The 12th-page COM Item)
confrontation adjustment pattern.
2
Black level adjustment
1. A JA-5CH signal is displayed.
1. It confirms that the third gradation is
(The 12th-page N358
a cut-off point from the left of the
BRIGHTNESS Item)
gradation pattern.
3
White balance adjustment 1. A JA-6CH signal is displayed.
1. White balance in comparison with the
(The 12, 13th-page
Typ monitor.
N358 R CUTOFF
N358 B CUTOFF
N358 R DRIVE
N358 B DRIVE Item)
N358 B CUTOFF
N358 R DRIVE
N358 B DRIVE Item)
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