Mitsubishi SL2U Service Manual page 15

[Liquid Crystal Panel
Driving Adjustment Circuit]
2. Ghost (SL2U)
Measuring
---
instrument
Test point ---
EXT trigger ---
Measurement
---
range
Input signal Shown in the table below
Input terminal COMPUTER IN terminal
No. Pattern
35 SMPTE (Red)
36 SMPTE (Green)
37 SMPTE (Blue)
Adjustment purpose To remove ghosts from the screen.
Symptom when Ghosts appear.
incorrectly adjusted
* Make this adjustment only when ghosts remarkably appear on the screen.
* Enter the adjustment command with capital alphanumeric letters.
1. Connect this PROJECTOR with a personal computer (with Microsoft
Windows
2. Start Microsoft
3. Start the communication program [Hyper Terminal] in Microsoft
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
5. Project pictures onto the screen.
Red
6. Supply an SVGA signal (SMPTE(Red), No. 35).
7. Operate the signal source to be projected in red monochrome on the screen.
8. Enter the adjustment command [00 ~ 3C09
to minimise the red ghosts. Enter [002], [003], [004] or [005] to
minimum ghosts. The point where the ghost appeared minus 1 is optimum.
(*1)
9. Enter command for writing [00 ~ 18B3
write the changed value onto the EEPROM.
Fill the
Green
10. Supply an SVGA signal (SMPTE(Green), No. 36).
11. Operate the signal source to be projected in green monochrome on the screen.
12. Enter the adjustment command [00 ~ 3C0A
to minimise the green ghosts. Enter [002], [003], [004] or [005] to
minimum ghosts. The point where the ghost appeared minus 1 is optimum.
(*1)
13. Enter command for writing [00 ~ 18B5
write the changed value onto the EEPROM.
Fill the
Blue
14. Supply an SVGA signal (SMPTE(Blue), No. 37).
15. Operate the signal source to be projected in blue monochrome on the screen.
16. Enter the adjustment command [00 ~ 3C0B
to minimise the blue ghosts. Enter [002], [003], [004] or [005] to
minimum ghosts. The point where the ghost appeared minus 1 is optimum. (*1)
17. Enter command for writing [00 ~ 18B7
write the changed value onto the EEPROM.
Fill the
(*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

95/98/Me/XP Operating System). (Refer to the figure on P.1)
 
Windows 95/98/Me/XP in the personal computer.
with the right 2 digits of the value entered at step 8. (*1)
with the right 2 digits of the value entered at step 12. (*1)
with the right 2 digits of the value entered at step 16. (*1)
.
- 4 -

Windows
] to the Hyper Terminal window
] to the Hyper Terminal window and
] to the Hyper Terminal window
] to the Hyper Terminal window and
] to the Hyper Terminal window
] to the Hyper Terminal window and


for
for
for