Electrical Adjustment - Sharp XG-C40XU Service Anleitung

XG-C40XU 1
( )
XG-C40XE ( 1 )
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
1 EEPROM
initialization
2 3.3V power
supply
adjustment
3 2.5V power
supply
adjustment
4 R drive
5 B drive
6 G drive
7 RGB 1 system
black level
signal amplitude
(odd-numbered)

ELECTRICAL ADJUSTMENT

Adjusting conditions
1. Turn on the power (make
sure the lamp lights up) and
warm up the unit for 15 min-
utes.
1. Turn on the power.
2. Connect the digital voltme-
ter to TP1446.
1. Turn on the power.
2. Connect the digital voltme-
ter to TP1447.
1. Feed the 100% red-only sig-
nal. Make the following
choice.
Group : A/D
Subject : R-D
1. Feed the 100% blue-only
signal. Make the following
choice.
Group : A/D
Subject : B-D
1. Feed the 100% green-only
signal. Make the following
choice.
Group : A/D
Subject : G-D
1. Make the following choice:
Group : OUTPUT 1
Subject : G1-BLK
G1-GAIN
For red, choose the sub-
jects R1-BLK and R1-GAIN.
For blue, choose the sub-
jects B1-BLK and B1-GAIN.
2. Connect the oscilloscope to
TP1101 for red.
TP1201 for green.
TP1301 for blue.
Adjusting procedure
» Make the following settings:
Press SW5101 to call up the process mode and
execute 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 board".
» Adjust R1649 so that the voltmeter should read
3.43 ±0.03 Vp-p.
» Adjust R1652 so that the voltmeter should read
2.60 ±0.05 Vp-p.
» Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
» Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
» Using the control switches or the remote controller
buttons, adjust the data so that the signal becomes
bit-less (noise).
» Choose the subject G1-GAIN and adjust the sig-
nal amplitude to 3.6 ±0.1 Vp-p using the control
switches or the remote controller buttons.
» Next,choose the subject G1-BLK and adjust the
white to white level to 2.5 ±0.1V DC.
2.5V
(Adjust to 2.5V
DC for red and
blue.)
» Adjust the signal's amplitude and white to white
level to 2.5 ± 0.1 DC and 3.6 ± 0.1V Vp-p, respec-
tively, for red and blue.
4
3.6Vp-p
(Adjust to 3.6Vp-p
for green and blue.)