Sharp XG-NV2SB, Service Manual

Page: 26 / 148

26
XG-NV2SB
No. Adjusting point Adjusting conditions Adjusting procedure
5 RGB 1 system
black level
signal amplitude
(odd-numbered) 1. Make the following choice:
Group : OUTPUT 1
Subject : R1-BLK
R1-GAIN
For green, choose the sub-
jects G1-BLK and G1-
GAIN.
For blue, choose the sub-
jects B1-BLK and B1-GAIN.
2. Connect the oscilloscope to
pin (4)(TP1101) of SC1101
for red.
Pin (4)(TP1201) of
SC1201 for green
Pin (4)(TP1301) of
SC1301 for blue
»
Choose the subject R1-BLK and adjust the black
peak level to 2.7 ±0.1V DC using the control switches
or the remote controller buttons.
»
Next, choose the subject R1-GAIN and adjust the
signal amplitude to 2.9 ±0.1 Vp-p.
»
Make the same adjustment for green and blue.
6 RGB 2 system
black level
signal amplitude
(even-num-
bered) 1. Make the following choice:
Group : OUTPUT 2
Subject : R2-BLK(R),
R2-GAIN
For green, choose the sub-
jects G2-BLK and G2-
GAIN.
For blue, choose the sub-
jects B2-BLK and B2-GAIN.
2. Connect the oscilloscope to
pin (6)(TP1102) of SC1101
for red.
Pin (6)(TP1202) of
SC1201 for green
Pin (6)(TP1302) of
SC1301 for blue
»
Choose the subject R2-BLK and adjust the black
peak level to 2.7 ±0.1V DC using the control switches
or the remote controller buttons.
»
Next, choose the subject R2-GAIN and adjust the
signal amplitude to 2.9 ±0.1 Vp-p.
»
Make the same adjustment for green and blue.
»
Feed the SVGA gradation pattern single-color sig-
nal and make sure that there is no difference in
brightness between adjacent vertical lines. If there
is a difference, make fine adjustment by choosing
the following subjects.
R2-GAIN for red
G2-GAIN for green
B2-GAIN for blue.
7 Sample-and-
hold pulse
phase
RCK-PHASE
GCK-PHASE
BCK-PHASE 1. Feed the XGA mode 75-Hz
black signal.
2. Make the following choice:
Group : OUTPUT 3
Subject : SH-PHASE
(Have the standard level at
8.)
Fix the R-, G- and B-
PHASE settings all to 4.
»
Using the control switches or the remote controller
buttons, make sure that the “OUTPUT 3” characters
are not blurry and there is no ghost image. If such
blur or ghost occurs, finely adjust the setting in the
range of 7~9.
2.9Vp-p
2.7V DC
2.9Vp-p
2.7V DC