ELECTRICAL ADJUSTMENT
2 PC board
1. Feed the XGA black signal.
Adjust the signal’s black level to 1.7 DC and add 10
brightness
2. Connect the oscilloscope to
points to then adjusted value.
adjustment
3. Make the following choice:,
Group
OUTPUT2
Subject BRIGHT
3
PC board AD
Group A/D
l
Adjust the positive-pole voltage of C64 to 1.7 DC.
converter
Subject
l
Similarly, adjust the positive-pole voltages of C57 and
reference
GOS,
in the subjects
and BOS, respectively.
voltage
adjustment
4
PC board drive
1. Group
l
Make adjustment so that the white peak level of the
adjustment
Subject Set GAIN
signal becomes 3.6 DC. At this time, make
value at 163.
that the waveform is not deformed at both the black
2. Feed the XGA and gray scale
side and white side.
signal.
l
Similarly, make adjustment for TP2 and TP3 in the
3. Connect the oscilloscope to
subjects G-D and B-D, respectively.
4. Make the following choice:
Group A/D
Subject R-D
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.
Note
All the adjusted data will be cleared by making the “FACTORY SETTING or “FACTORY SETTING 2”.
Before using the previous data for adjustment, write down the modified data on a notepad or the like and
then make the
No.
Adjusting point
Adjusting conditions
Adjusting procedure
1
EEPROM in
1. Turn on the power (make
l
Make the following settings:
initialization
sure the lamp lights up) and
Press
to call up the process mode and
(Note)
warm up the unit for
in the
menu. Now the system, with the
PC board not included, is initialized. In order to make
the PC board adjustments (Nos. 2, 3 and
execute
If not making those PC board adjustments, do
not execute
.
4. Press the sound mute key’
to cancel the
bar test
pattern that is automatically
outputted.
