Mitsubishi Electric LC62 CHASSIS XL6500LU, Руководство по обслуживанию

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[Liquid Crystal Panel Driving
Adjustment Circuit]
2. Flicker To remove fl ickers form the screen.
Flickers appear.
Measuring
instrument
-----
Test point -----
EXT trigger
-----
Measurement
range
-----
Input signal
Shown in the table
below
Input terminal
COMPUTER 2
IN terminal
Adjustment purpose
Symptom when
incorrectly adjusted
* Make this adjustment only when fl ickers 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 projector for 2 minutes or more supply-
ing the specifi ed test signal to it.
1. Connect the projector with a PC running Microsoft ® Windows ® 95/98/Me/XP operat-
ing system. (Refer to the fi gure on page 1.)
2. Start Microsoft
®
Windows
®
95/98/Me/XP.
3. Start the communication program [Hyper Terminal] on Microsoft ® Windows ® 95/98/
Me/XP to open the Hyper Terminal window. (Refer to Hyper Terminal Setting on
page 2 for the settings.)
4. Set the following items in the IMAGE menu.
CONTRAST
0
BRIGHTNESS 0
COLOR
TEMP STANDARD
5. Project an image onto the screen.
6. Enter
the fl icker adjustment mode command [00~3100008AFC] on the Hyper Termi-
nal window to make the fl ickers easy to view.
Red
7. Supply an XGA signal (Every other horizontal line (Red), No. 15).
8. Enter the adjustment command [00~217
] on the Hyper Terminal window to mini-
mize the red fl ickers. For ,select a value that reduces the fl ickers most*. (Enter a
value from [56] to [72] (HEX).)
9. Enter the writing command [00~1044 ] on the Hyper Terminal window to write the
new value into the E 2 PROM.
Enter the value that was entered in step 8 in .
Green
10. Supply an XGA signal (Every other horizontal line (Green), No. 16).
11. Enter the adjustment command [00~237
] on the Hyper Terminal window to mini-
mize the green fl ickers. For ,select a value that reduces the fl ickers most*. (Enter
a value from [56] to [72] (HEX).)
12. Enter the writing command [00~1045 ] on the Hyper Terminal window to write the
new value into the E 2 PROM.
Enter the value that was entered in step 11 in *.
Blue
13. Supply an XGA signal (Every other horizontal line (Blue), No. 17).
14. Enter the adjustment command [00~257
] on the Hyper Terminal window to mini-
mize the green fl ickers. For , select a value that reduces the fl ickers most*. (Enter
a value from [56] to [72] (HEX).)
15. Enter the writing command [00~1046 ] on the Hyper Terminal window to write the
new value into the E 2 PROM.
Enter the value that was entered in step 14 in *.
16. Enter the fl icker adjustment mode cancel command [00~310000AAFC] on the Hy-
per Terminal window to go back to the regular screen.
* When the command is sent successfully, such command is returned as it is after
sending. You can check the current value by sending the command without entering
any value in .
No. Pattern
15 XGA Every other horizontal line (Red)
16 XGA Every other horizontal line (Green)
17 XGA Every other horizontal line (Blue)
Every other horizontal line pattern