DOWNLOAD Sharp XG-NV21SE (serv.man4) Service Manual ↓ Size: 147.96 KB | Pages: 29 in PDF or view online for FREE

Model
XG-NV21SE (serv.man4)
Pages
29
Size
147.96 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Resetting the total lamp timer, The optical unit outline, Covergence and focus adjustment, Electrical adjustment, Adjusting the PC board, Troubleshooting table - Page 15-43
File
xg-nv21se-sm4.pdf
Date

Sharp XG-NV21SE (serv.man4) Service Manual ▷ View online

23
XG-NV21SE
XG-NV21SM
XG-NV21SA
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-
j e c t s   B 1 - B L K   a n d   B 1 -
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-
j e c t s   B 2 - B L K   a n d   B 2 -
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-colour 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.)
F i x   t h e   R - ,   G -   a n d   B -
PHASE settings all to 4.
»
Using the control switches or the remote controller
buttons, make sure that the “OUTPUT 3” charac-
ters 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
24
XG-NV21SE
XG-NV21SM
XG-NV21SA
No.
Adjusting point
Adjusting conditions
Adjusting procedure
8
RGB counter-
voltage
adjustment
1. Feed the black-and-red
(25%) stripe signal (SVGA)
to RGB1.
2. Make the following choice:
Group : OUTPUT 3
Subject : RC (R)
3. Change to the outer RG1 at
the shoot of the operating
switches or the remote con-
troller buttons.
»
Using the control switches or the remote controller
buttons, adjust the data in order to minimize the flicker.
»
Make the same adjustment for BC (B) and GC (G).
»
See if the image is equally adjusted at the center
and both sides of the screen. If not, readjust the
setting to have the image equal at right and left.
9
RGB white
balance
1. Feed the 32-step gray scale
signal (SVGA).
Group : OUTPUT 1
Subject : R1-BLK
R1-GAIN (R)
B1-BLK
B1-GAIN (B)
»
Choose the subjects R1-BLK and B1-BLK and adjust
the black balance of the gradation. Choose the
subjects R1-GAIN and B1-GAIN and adjust the gray-
to-while balance.
11
Video picture
adjustment
1. Feed the split colour bar
signal.
Group : VIDEO 1
Subject : PICTURE
2. Connect the oscilloscope
between pin (2) of P801
and GND.
»
Using the control switches or the remote controller
buttons, adjust the black-to-white (100%) level
difference to 2.2 ±0.02 Vp-p.
2.2 Vp-p
10
Horizontal
center
1. Feed the NTSC mono-
scope pattern signal.
2. Group : VIDEO 2
Subject : N358-DLY
N443-DLY
PAL-DLY
SECAM-DLY
Make sure all the settings
are zero (0).
3. Group : VIDEO 1
Subject : NTSC-H
»
Using the control switches or the remote controller
buttons, adjust the data to have the same overscan.
25
XG-NV21SE
XG-NV21SM
XG-NV21SA
No.
Adjusting point
Adjusting conditions
Adjusting procedure
12
Video AGC
1. Feed the split colour bar
signal.
Group : VIDEO 1
Subject : AGC
2. Connect the oscilloscope
between pin (2) of P801
and GND.
»
Using the control switches or the remote controller
buttons, adjust the black-to-white (100%) level
difference to 1.65 ±0.02 Vp-p.
13
Video
brightness
adjustment
1. Feed the baseband (split
colour bar) signal. (The
ON-AIR signal is not ac-
cepted 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).
»
Using the control switches or the remote controller
buttons, adjust the setting until the black signal
becomes bit-less.
15
NTSC colour
saturation level
1. Feed the split colour bar
signal.
Group : VIDEO 1
Subject : N-COLOR
2. Connect the oscilloscope to
pin (1) of P801.
»
Using the control switches or the remote controller
buttons, adjust the difference between the 100%
white portion and the red portion to 0.1 ±0.02 Vp-p.
1.65 Vp-p
14
Tint
1. Feed the split colour bar
signal.
Group : VIDEO 1
Subject : TINT
2. Connect the oscilloscope to
pin (5) of P801.
»
Using the control switches or the remote controller
buttons, adjust the data to have the -(B-Y) waveform
downhill straight.
100% White Red
0.1Vp-p
26
XG-NV21SE
XG-NV21SM
XG-NV21SA
No.
Adjusting point
Adjusting conditions
Adjusting procedure
18
Video white
balance
1. Feed the NTSC mono-
scope pattern signal.
Group : VIDEO 2
Subject : R1-GAIN
B1-GAIN
»
Using the control switches or the remote controller
buttons, adjust the data so that the white balance be
just the best white balance.
If the black side is not properly adjusted, first
readjust the black side by making the following
choice:
Group : OUTPUT 1
Subject : R1-BLK
B1-BLK
Then, make the following choice:
Group : VIDEO 2
Subject : R1-GAIN
B1-GAIN
Readjust the related data.
Since the subjects R1-BLK and B1-BLK are com-
mon for the RGB input and VIDEO input, feed the
RGB signal again to adjust the white balance.
17
SECAM colour
saturation level
1. Feed the SECAM colour
bar signal.
Group : VIDEO 1
Subject : S-COLOR
2. Connect the oscilloscope to
pin (1) of P801.
»
Using the control switches or the remote controller
buttons, adjust the data to have a level difference of
0.48 ±0.02 Vp-p between the 100% white portion and
the red portion.
19
Colour system
performance
check
1. Receive the colour bar sig-
nal.
»
In the process mode and select L1. Check the colour
and tint.
1. Receive the monoscope
pattern signal.
»
In the process mode and select L2. Check the pic-
ture, brightness and sharpness.
16
PAL colour
saturation level
1. Feed the PAL colour bar
signal.
Group : VIDEO 1
Subject : P-COLOR
2. Connect the oscilloscope to
pin (1) of P801.
»
Using the control switches or the remote controller
buttons, adjust the difference between the 100%
white portion and the red portion to 0.48±0.02 Vp-p.
100% White Red
0.48Vp-p
100% White Red
0.48Vp-p
20
Video system
performance
check
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