-
6
-
Adjustment purpose
[Liquid Crystal Panel
Driving Adjustment Circuit]
3. Flicker
Symptom when
incorrectly adjusted
Measuring
instrument
Test point
EXT trigger
Measurement
range
Input signal
Input terminal
To remove flickers form the screen.
Flickers appear.
---
---
---
---
Shown in the Table 1, 2
COMPUTER IN terminal
* Make this adjustment only when flickers remarkably appear on the screen.
* Enter the adjustment commands and adjustment values of the hexadecimal
number in capital alphanumeric letters.
* Carry out this adjustment after running the product for 2 minutes or more
supplying the specified test signal to it.
1. Connect this PROJECTOR with a personal computer (with Microsoft
Windows
95/98/Me/XP Operating System). (Refer to the figure on P.1)
2. Start Microsoft
Windows
95/98/Me/XP in the personal computer.
3. Start the communication program [Hyper Terminal] in Microsoft
Windows
95/98/Me/XP to open the window. (For setting, refer to Hyper Terminal setting
on P.2)
4. Set the following items on the picture menu.
CONTRAST . . . . . . . . . . . .0
BRIGHTNESS . . . . . . . . . .0
COLOR TEMP . . . . . . . . . .STANDARD
COLOR MATRIX . . . . . . . . .OFF
Red
5. Supply a signal (Horizontal line every other red picture element, No. 15).
6. Project pictures onto the screen.
7. Enter the adjustment command [00
~
211 ] to the Hyper Terminal window to
minimize the red flickers. Enter any value from [A5] to [D9] (HEX) to for
minimum flickers. (*1)
8. Enter command for writing [00
~
1700 ] to the Hyper Terminal window and
write the changed value onto the EEPROM.
Enter the value of step 7 to . (*1)
Green
9.
Supply a signal (Horizontal line every other green picture element, No. 16).
10. Enter the adjustment command
[
00
~
212 ] to the Hyper Terminal window to
minimize the green flickers. Enter any value from [A5] to [D9] (HEX) to for
minimum flickers. (*1)
11. Enter command for writing [00
~
1701
]
to the Hyper Terminal window and
write the changed value onto the EEPROM.
Enter the value of step 10 to . (*1)
Blue
12.
Supply a signal (Horizontal line every other blue picture element, No. 17).
13. Enter the adjustment command [00
~
213 ] to the Hyper Terminal window to
minimize the blue flickers. Enter any value from [A5] to [D9] (HEX) to for
minimum flickers. (*1)
14. Enter command for writing [00
~
1702
]
to the Hyper Terminal window and
write the changed value onto the EEPROM.
Enter the value of step 13 to . (*1)
(*1) When the sent command is displayed, sending is accomplished correctly.
The current value can be confirmed by sending the command without
entering any value to .
Every other horizontal line
pattern
No.
Pattern
15 Every other Horizontal Line (Red)
16
Every other Horizontal Line (Green)
17 Every other Horizontal Line (Blue)
Table 2
Table 1
Model
Signal
SL2U SVGA
XL2U XGA
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