Sharp AN-S422U, Service Manual

Page: 34 / 166

34
XG-V10WU
AN-SD1U/S422U
No. Adjusting point Adjusting conditions Adjusting procedure
22 DVD input panel
signal amplitude
adjustment 1. Feed the 10-step signal to
the G (Y) input terminal on
the BNC socket.
2. Select the following group
and subjects.
Group : DVD
Subject : R1-GAIN
B1-GAIN
3. Connect the oscilloscope to
pin (1) (for R) of P1001 and
pin (3) (for G) of P1001.
4. Similarly connect the oscil-
loscope to the following for
the B color.
Pin (5) of P1001 for B
Pin (3) of P1001 for G
»
Select R1-GAIN. Adjust the setting so that the R
signal amplitude and the G signal amplitude be
the same.
»
Do the same for the B color.
23 DVD white
balance check-
ing 1. Feed the NTSC
monoscope pattern signal
to the G (Y) input terminal
on the BNC socket.
2. Select the following group
and subjects.
Group : DVD
Subject : R1-BLK
B1-BLK
»
Make sure the white balance is the same as on
the monitor screen.
»
If not, adjust the setting so that the white balance
be the same as on the monitor screen, using the
set's control switch or the remote controller's
button.
21 DVD color
saturation
adjustment 1. Feed the 100% color bar
signal of the 480I compo-
nent signal to the Y, Pb and
Pr input terminals on the
BNC socket.
2. Select the following group
and subject.
Group : DVD
Subject : COLOR
3. Connect the oscilloscope to
pin (1) of P801.
»
Using the set’s control switch or the remote
controller’s button, adjust the setting so that the
amplitude between the 100% white and red levels
be 0.10 ± 0.02 Vp-p.
100% White Red
24 Saw-tooth wave
correction (G),
(R) Make sure the lamp optical
axis has been already ad-
justed.
1. Feed the SXGA, 60-Hz
gray-only signal.
2. Check for uneven color
spot on the screen.
3. Select the following group
and subject.
Group : NOKO
Subject : NOKO-G
Choose the subject NOKO-
R for the R color.
»
When the green color is found not uneven, turn off
the saw-tooth wave correction with S4201.
»
Select NOKO-G and adjust the setting to minimize
the color unevenness at right and left on the
screen.
For the R color, use S4202 to turn on or off the wave
correction.