XG-NV51XE (serv.man9). Electrical adjustment — Sharp Projector Service Manual (repair manual)

Model
XG-NV51XE (serv.man9)
Pages
6
Size
20.7 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Electrical adjustment
File
xg-nv51xe-sm9.pdf
Date

View Sharp XG-NV51XE (serv.man9) Service Manual online

23
XG-NV51XE/XM/XA
ELECTRICAL ADJUSTMENT
Hook up a signal generator, or a DOSV or Mac personal computer to the projector in order to feed the
signals specified in the Adjusting conditions.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
1
EEPROM
initialization
1. Turn on the power (make
sure the lamp lights up) and
warm up the unit for 15 min-
utes.
»
Make the following settings:
Press S5001 to call up the process mode and ex-
ecute S2 in the SSS menu. Now the system, with
the PC board not included, is initialized. Do not
execute S1 because otherwise the PC board will be
initialized.
To adjust the PC board, follow the instruction in
"Adjusting the PC Interface". (See page 29)
4
R drive
1. Make the following choice.
Group : A/D
Subject : GAIN
Make sure the GAIN value
is 163.
2. Feed the 100% red-only
signal. Make the following
choice.
Group : A/D
Subject : R-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal becomes
bit-less (noise).
5
B drive
1. Feed the 100% blue-only
signal. Make the following
choice.
Group : A/D
Subject : B-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal becomes
bit-less (noise).
6
G drive
1. Feed the 100% green-only
signal. Make the following
choice.
Group : A/D
Subject : G-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal becomes
bit-less (noise).
2
3.3V power
supply
adjustment
1. Turn on the power.
2. Connect the digital voltme-
ter to TP1446.
»
Adjust R1649 so that the voltmeter should read
3.325 V ±100 mV.
3
2.5V power
supply
adjustment
1. Turn on the power.
2. Connect the digital voltme-
ter to TP1447.
»
Adjust R1652 so that the voltmeter should read 2.625
V ±50 mV.
24
XG-NV51XE/XM/XA
No.
Adjusting point
Adjusting conditions
Adjusting procedure
7
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
TP1101  for red.
    TP1201  for green
    TP1301  for blue
8
P SIGNAL
1. Connect the oscilloscope to
TP1102 for red.
    TP1202 for green.
    TP1302 for blue.
2. Make the following choice:
Group : OUTPUT 2
Subject : PSIG-H
: PSIG-L
»
Adjust the PSIG waveform to the one shown below.
»
For the green and blue colours, make sure their
waveforms are similar to that of the red colour.
2.3V DC
5.9V DC
7.8V DC
GND
PSIG
(Adjust with PSIG-L.)
(Adjust with PSIG-H.)  
»
Choose the subject R1-GAIN and adjust the signal
amplitude to 3.6 ±0.1 Vp-p using the control switches
or the remote controller buttons.
»
Next,choose the subject R1-BLK and adjust the black
peak level to 3.2 ±0.1V DC.
»
Adjust the signal's amplitude and maximum black
level to 3.3 ± 0.1Vp-p and 3.4 ± 0.1V DC, respec-
tively, for green and blue.
3.6Vp-p
2.5 
±
0.1Vp-p
3.2V DC 
  (Adjust to 3.4V DC for blue.)
(Adjust to 3.3Vp-p
 for green and blue.)
(Adjust to 
 2.5Vp-p
 for green.)
9
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 RCK-, GCK- and
BCK-PHASE settings all to
8.
»
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.
25
XG-NV51XE/XM/XA
No.
Adjusting point
Adjusting conditions
Adjusting procedure
10
RGB counter-
voltage
adjustment
1. Feed the black-and-red
(25%) stripe signal (XGA).
2. Make the following choice:
Group : OUTPUT 3
Subject : RC (R)
»
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.
11
RGB gradation
regeneration
adjustment
1. Feed the green-only SMPTE
pattern signal.(XGA)
Group : OUTPUT 1
Subject : G1-GAIN
»
Adjust the G-GAIN data until the gradation of the
portion 
1
 (95% and 100% white) shown below can
be slightly recognized.  Make sure also that the
gradation of the portion 
2
 (0% and 5% black) is
visible.
1
2
12
RGB white
balance
1. Feed the 32-step gray scale
signal (XGA).
Group : OUTPUT 1
Subject : R1-BLK (R)
B1-BLK (B)
»
Choose the subjects R1-BLK and B1-BLK and adjust
the black balance of the gradation.
13
Horizontal
center
1. Feed the NTSC mono-
scope pattern signal.
2. Group : VIDEO 2
Subject : N358-DLY
(6)
N443-DLY
(2)
PAL-DLY
(2)
SECAM-DLY (2)
Make sure the settings are
    as above.
3. Group : VIDEO 1
Subject : NTSC-H
»
Using the control switches or the remote controller
buttons, adjust the data to have the same overscan.
14
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 2.0 ±0.02 Vp-p.
2.0Vp-p
26
XG-NV51XE/XM/XA
15
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 1.50 ±0.02 Vp-p.
16
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 and set to -2 point of value.
18
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 0.10 ±0.02 Vp-p.
   (same as 100% white)
17
Tint
1. Feed the split colour bar
signal.
Group : VIDEO 1
Subject : TINT
2. Connect the oscilloscope to
pin (4) of P801.
»
Using the control switches or the remote controller
buttons, adjust the data to have the -(B-Y) wave-
form downhill straight.
1.50Vp-p
100% White Red
No.
Adjusting point
Adjusting conditions
Adjusting procedure
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