Sharp XG-NV5XB Service Manual page 28

XG-NV5XB
No. Adjusting point
15 Video AGC
16 Video
brightness
adjustment
17 Tint
18 NTSC color
saturation level
Adjusting conditions
1. Feed the split color bar sig-
nal.
Group : VIDEO 1
Subject : AGC
2. Connect the oscilloscope
between pin (2) of P801
and GND.
1. Feed the baseband (split
color bar) signal. (The ON-
AIR signal is not accepted
because of its too much
noise.)
Group : VIDEO 1
Subject : BRIGHT
2. Press the control switch or
the remote control's mute
button (to set the gamma
correction to the process
setting).
1. Feed the split color bar sig-
nal.
Group : VIDEO 1
Subject : TINT
2. Connect the oscilloscope to
pin (4) of P801.
1. Feed the split color bar sig-
nal.
Group : VIDEO 1
Subject : N-COLOR
2. Connect the oscilloscope to
pin (1) of P801.
Adjusting procedure
» Using the control switches or the remote controller
buttons, adjust the black-to-white (100%) level
difference to 1.50 ±0.02 Vp-p.
» Using the control switches or the remote controller
buttons, adjust the setting until the black signal
becomes bit-less and set to -2 point of value.
» Using the control switches or the remote controller
buttons, adjust the data to have the -(B-Y) wave-
form downhill straight.
» Using the control switches or the remote controller
buttons, adjust the difference between the 100%
white portion and the red portion to 0.10 ±0.02 Vp-p.
(same as 100% white)
100% White Red
28
1.50Vp-p