Sharp XV-C100U Service Manual page 22

XV-C100U
No. Adjustment Item
14
R-bias
B-bias
15 NTSC color
(DAC) (gamma
correction on)
16 PAL color (DAC)
(gamma
correction on)
Adjustment Conditions
1. Receive the NTSC 10-step pattern
signal.
2. Connect the dual-beam oscilloscope
between pin (3)(R) (or pin (1)(B)) of
P1401 and GND.
3. Press S2001 to call up the ADJ IN
mode and select the following subject.
Group: VIDEO 2
Subject: R-BIAS, B-BIAS
1. Receive the NTSC half-color bar signal.
2. Connect the dual-beam oscilloscope
between pin (3) of P1401 and GND.
3. Press S2001 to call up the ADJ IN
mode and select the following subject.
Group: VIDEO 2
Subject: COLOR
1. Receive the PAL half-color bar signal.
2. Connect the dual-beam oscilloscope
between pin (3) of P1401 and GND.
3. Press S2001 to call up the ADJ IN
mode and select the following subject.
Group: VIDEO 2
Subject: P-COLOR
22
Adjustment Procedure
• Using the ' and " keys, adjust the
difference between the white levels
to 3.0±0.05 Vp-p.
• Using the ' and " keys, adjust the
difference between the 100% white
level and the primary red level to
0±0.05 Vp-p.
100% white
Primary red
• Using the ' and " keys, adjust the
difference between the 100% white
level and the primary red level to
0.10±0.05 Vp-p.
100% white
Primary red