Mitsubishi SL1U Service Manual page 26

[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 XGA Every other Horizontal Line (Red)
16 XGA Every other Horizontal Line (Green)
17 XGA Every other Horizontal Line (Blue)
Table
Horizontal Line Every other
Picture Element Pattern
Adjustment purpose To remove flickers form the screen.
Symptom when Flickers appear.
incorrectly adjusted
* 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
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 . . . . . . . . . .STANDARD
COLOR MATRIX . . . . . . . . .USER (all colors to 0 in USER)
Red
5. Supply an XGA signal (Horizontal line every other red picture element, No. 15).
6. Project pictures onto the screen.
7. Enter the adjustment command [00 ~ 211
minimize the red flickers. Enter any value from [80] to [FF] (HEX) to
minimum flickers.
(*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
8. Enter command for writing [00 ~ 1700
write the changed value onto the EEPROM.
Enter the value of step 7 to
Green
9. Supply an XGA signal (Horizontal line every other green picture element, No. 16).
10. Enter the adjustment command [00 ~ 212
minimize the green flickers. Enter any value from [80] to [FF] (HEX) to
minimum flickers. (*1)
11. Enter command for writing [00 ~ 1701
write the changed value onto the EEPROM.
Enter the value of step 10 to
Blue
12. Supply an XGA signal (Horizontal line every other blue picture element, No. 17).
13. Enter the adjustment command [00 ~ 213
minimize the blue flickers. Enter any value from [80] to [FF] (HEX) to
minimum flickers. (*1)
14. Enter command for writing [00 ~ 1702
write the changed value onto the EEPROM.
Enter the value of step 13 to

95 Operating System). (Refer to the figure on P.1)
 
Windows 95 in the personal computer.
.
. (*1)
. (*1)
. (*1)
- 6 -

Windows
] to the Hyper Terminal window to
] to the Hyper Terminal window and
] to the Hyper Terminal window to
] to the Hyper Terminal window and
] to the Hyper Terminal window to
] to the Hyper Terminal window and


95
for
for
for