Sharp LC-20VM2E Service Manual page 16

LC-20VM2E
6-6-6. N443, PAL-M signal adjustment (Actual adjustment manipulation is unnecessary because PAL
data is copied by the data copy manipulation of the former term.
Adjustment
1 Brightness adjustment
(N443, PAL-M
BRIGHTNESS Item)
2 Unicolor adjustment
(N443, PAL-M
UNICOLOR Item)
3 Color level adjustment
(N443, PAL-M
SCOLOR Item)
4 Tint adjustment
(N443, PAL-M TINT Item)
Adjusting conditions
1. Input the NTSC standard color bar
to AV1.
2. Connect oscilloscope to TP821
(IC316, pin7, G output).
1. Input the NTSC standard color bar
to AV1.
2. Connect oscilloscope to TP821
(IC316, pin7, G output).
1. Input the NTSC standard color bar
to AV1.
2. Connect oscilloscope to TP820
(IC316, pin1, B output).
16
Adjusting method
1. Adjust N443 BRIGHTNESS, and
adjust the black level of G output so
as to get DC 0.35±0.05V.
1. Adjust TV UNICOLOR so as to
get 2.3±0.1Vp-p between the 100%
white and GND.
1. Adjust N443 SCOLOR so as to get
the color bar signal blue amplitude
(GND level - peak level) equal to
1.8V ± 0.1Vp-p.
1. DAC value is set in "62".
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