Sharp LC-20VM2E Service Manual page 13

LC-121M2E
LC-150M2E
3 B CUTOFF adjustment
(B CUTOFF Item)
4 Unicolor adjustment
(N358 UNICOLOR Item)
5 R DRIVE adjustment
(R DRIVE Item)
6 B DRIVE adjustment
(B DRIVE Item)
7 Colour level adjustment
(N358 SCOLOR Item)
8 Tint adjustment
(N358 TINT Item)
1. Input the NTSC standard color bar
to AV1.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
1. Input the NTSC standard color bar
to AV1.
2. Connect the oscilloscope to TP821
(IC316, pin7, G output).
1. Input the NTSC standard color bar
to AV1.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).
1. Input the NTSC standard color bar
to AV1.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
1. Input the NTSC standard color bar
to AV1.
2. Connect the oscilloscope to TP820
(IC316, pin1, B output).
13
1. Adjust B CUTOFF so as to equalize
the black levels of green and blue.
1. Adjust N358 UNICOLOR so as to
get 2.3±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.
1. Adjust N358 SCOLOR so as to get
the color bar signal blue amplitude
(GND - peak level) equal to 1.8V ±
0.1Vp-p.
1. DAC value is set in "67".
LC-20VM2E