Sharp LC-20VM2E Service Manual page 18

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