Mitsubishi S290U Service Manual page 14

[Liquid Crystal Panel
Driving Adjustment Circuit]
6. Ghost
Measuring
---
instrument
Test point ---
EXT trigger ---
Measurement
---
range
Input signal shown in the Table
Input terminal COMPUTER IN terminal
No. Pattern
35 SVGA SMPTE (R)
36 SVGA SMPTE (G)
37 SVGA SMPTE (B)
Table
8
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 small alphanumeric letters
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. Project pictures onto the screen.
Red
5. Supply an SVGA signal (SMPTE (R), No. 35).
6. Operate the signal source to be projected in red monochrome on the screen.
7. Enter the adjustment command [00 ~ 30c0
minimize the red ghosts. Enter [07], [08], [09], [0a] or [0b] to
ghosts.
(*1) When the sent command is displayed, sending is accomplished correctly.
8. Enter command for writing [00~1e68
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 (SMPTE (G), No. 36).
10. Operate the signal source to be projected in green monochrome on the screen.
11. Enter the adjustment command [00 ~ 30d0
minimize the green ghosts. Enter [07], [08], [09], [0a] or [0b] to
minimum ghosts. (*1)
12. Enter command for writing [00 ~ 1e6a
write the changed value onto the EEPROM.
Enter the value of step 11 to
sending the command without entering any value to
Blue
13. Supply an SVGA signal (SMPTE (B), No. 37).
14. Operate the signal source to be projected in blue monochrome on the screen.
15. Enter the adjustment command [00 ~ 30e0
minimize the blue ghosts. Enter [07], [08], [09], [0a] or [0b] to
ghosts. (*1)
16. Enter command for writing [00 ~ 1e6c
write the changed value onto the EEPROM.
Enter the value of step 15 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
for minimum
. (*1)
] to the Hyper Terminal window to
for
. (*1)
] to the Hyper Terminal window to
for minimum
. (*1)


95