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[Liquid Crystal Panel
Driving Adjustment Circuit]
3. Flicker
Measuring
---
instrument
Test point
---
EXT trigger
---
Measurement
---
range
Input signal
shown in the Table
Input terminal
COMPUTER IN terminal
No.
Pattern
15
SVGA Every other Horizontal Line (Red)
16
SVGA Every other Horizontal Line (Green)
17
SVGA Every other Horizontal Line (Blue)
Table
Horizontal Line Every other
Picture Element Pattern
Adjustment purpose
To remove flicker form the screen.
Symptom when
Image on screen flickers.
incorrectly adjusted
* Make this adjustment only when flicker remarkably appear on the screen.
* Enter the adjustment commands and adjustment values of the hexadecimal
number in small 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 to a personal computer (with Microsoft
95 Operating System). (Refer to the figure on P.1)
2. Start Microsoft
3. Start the communication program [Hyper Terminal] in Microsoft
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 . . . . .1 (standard)
Red
5. Supply an SVGA signal (Horizontal line every other red picture element, No.
15).
6. Project pictures onto the screen.
7. Enter the adjustment command [00 ~ 231
minimize the red flickers. Enter any value from [00] to [FF] (hex) to
minimum flicker.
(*1) When the sent command is displayed, sending is accomplished correctly.
8. Enter command for writing [00 ~ 1ec0
write the changed value onto the EEPROM.
Enter the value of step 7 to
sending the command without entering any value to
Green
9. Supply an SVGA signal (Horizontal line every other green picture element, No.
16).
10. Enter the adjustment command [00 ~ 232
minimize the green flickers. Enter any value from [00] to [FF] (hex) to
minimum flicker. (*1)
11. Enter command for writing [00 ~ 1ec1
write the changed value onto the EEPROM.
Enter the value of step 10 to
sending the command without entering any value to
Blue
12. Supply an SVGA signal (Horizontal line every other blue picture element, No.
17).
13. Enter the adjustment command [00 ~ 233
minimize the blue flickers. Enter any value from [00] to [FF] (hex) to
minimum flicker. (*1)
14. Enter command for writing [00 ~ 1ec2
write the changed value onto the EEPROM.
Enter the value of step 13 to
sending the command without entering any value to
Windows
95 in the personal computer.
] to the Hyper Terminal window and
. The current value can be confirmed by
] to the Hyper Terminal window and
. The current value can be confirmed by
] to the Hyper Terminal window and
. The current value can be confirmed by
Windows
Windows
] to the Hyper Terminal window to
. (*1)
] to the Hyper Terminal window to
. (*1)
] to the Hyper Terminal window to
. (*1)
95
for
for
for
5
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