Sharp Notevision PG-B10S, Service Manual

Page: 26 / 138

No. Adjusting point Adjusting conditions Adjusting procedure
26
PG-B10S
5 Video Bright-
ness/Contrast
adjustment 1. Feed an NTSC composite
video 10-step signal (no
setup) with 100% ampli-
tude.
2. Select the following group
and subjects.
Group : VIDEO
Subject : Bright
Contrast
(Process GAMMA interlock)
1. Check the setting value.
Contrast (White Level): 43
Bright (Black Level):
142
6 PSIG adjust-
ment
1. Select the following group
and subjects.
Group : OUTPUT2
Subject : PSIG-H
PSIG-L
2. Check the fixed value.
PSIG-H: 140
PSIG-L: 105
GND
Adjust with PSIG-L
Adjust with PSIG-H
2.0V DC
(typ)
2.0V DC
(typ)
6.8V DC
(typ)
1. Feed the SVGA signal and adjust to make the fol-
lowing PSIG waveform. (TP1201)
7 R/G/B Black
Level Signal
Amplitude
adjustment
1. Select the following group
and subjects.
Group : OUTPUT1
Subject :
On Green adjustment
(G1-BLK)
G1-GAIN
On Red Adjustment
(R1-BLK)
R1-GAIN
On Blue Adjustment
(B1-BLK)
B1-GAIN
2. Make sure the process ad-
justment color bags appear
onscreen.
3. Connect a oscilloscope to
pin(2) of P1302 for the G
setting.
4. Connect the oscilloscope to
pin(1) of P1302 and pin(3)
of P1302 for the R and B
settings, respectively.
White-to-White
Amplitude
1. Select G1-GAIN. Using the set's control switch or
the remote controller's button, adjust the signal am-
plitude to 4.35 Vp-p ± 0.05 V.
2. Now select G1-BLK. Using the set's control switch
or the remote controller's button, adjust the white-
to-white level to 1.10 Vp-p ± 0.05 V.
3. Do the same for the R and B settings.