Read Sharp LC-20VM2E (serv.man2) Service Manual online
17
LC-20VM2E
LC-121M2E
LC-150M2E
LC-150M2E
6-6-7. Component (50/60Hz) input adjustment
Adjustment
Adjusting conditions
Adjusting method
1
Brightness adjustment
1. From SG, input the 100% white color
1. Adjust DVD 50/60 BRIGHTNESS, and
(DVD 50/60 BRIGHTNESS
bar signal of PAL into conponent
adjust the black level of G output so
Item)
terminal.
as to get DC 0.35
±
0.05V.
2. Connect oscilloscope to TP821
(IC316, pin7, G output).
2
Unicolor adjustment
1. From SG, input the 100% white colour
1. Adjust DVD 50/60 UNICOLOR so
(DVD 50/60 UNICOLOR
bar signal of PAL into conponent
as to get 2.3
±
0.1Vp-p between the
Item)
terminal.
100% white and GND.
2. Connect oscilloscope to TP820
(IC316, pin1, B output).
3
Color level adjustment
1. DAC value is set in "61".
(DVD 50/60 COLOR Item)
4
Tint adjustment
1. DAC value is set in DVD 60 TINT
(DVD 50/60 TINT Item)
"67" DVD 50 TINT "62".
6-6-8. RGB signal adjustment
Adjustment
Adjusting conditions
Adjusting method
1
RGB Brightness
1. Input the test pattern to RGB.
1. Adjust RGB BRIGHTNESS, and
adjustment
2. Connect oscilloscope to TP821
adjust the black level of G output so
(RGB BRIGHTNESS
(IC316, pin7, G output).
as to get DC 0.6
±
0.05V.
Item)
2
RGB R CUTOFF
1. Input the test pattern to RGB.
1. Adjust RGB R CUTOFF so as to
adjustment
2. Connect CH1 of the oscilloscope to
equalizethe black levels of green and
(RGB R CUTOFF off Item)
TP821 (IC316, pin7, G output).
blue.
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).
3
RGB B CUTOFF
1. Input the test pattern to RGB.
1. Adjust RGB B CUTOFF so as to
adjustment
2. Connect CH1 of the oscilloscope to
equalizethe black levels of green and
(RGB B CUTOFF off Item)
TP821 (IC316, pin7, G output).
blue.
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
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