- 6 -
REPLACEMENT OF THE MAIN PCB ASSY
1. Outline
Replacing the MAIN PCB ASSY involves reading the factory
adjustment data from the old MAIN PCB ASSY and
transferring such data to a new MAIN PCB ASSY. There
are three ways to transfer the data as follows:
(1) Replace the EEPROM (IC703 (XL2U only), IC705).
(2) Follow “Electrical Adjustments” when the EEPROM on
the old MAIN PCB ASSY is defective.
(3) Read and transfer the data referring to “How to Read
and Transfer the Data” when you can’t replace the
EEPROM.
It is recommended to replace the EEPROM on which the
data are stored because it is the most quick and effective
way.
When you replace the MAIN PCB ASSY by the method (2)
or (3) above, it is necessary to read and transfer the data as
described below first, and then carry out “UNIFORMITY
DATA TRANSFER” and “GAMMA ADJUSTMENT (WHITE
BALANCE ADJUSTMENT)”.
In the case of XL2U, you are required to register the user
logo again after these adjustments.
2. Necessary Tools
• Projector
• Personal computer (PC)
• RS-232C cable (attachment)
• Program folder “ChangePwbMAIN”
3. How to Read and Transfer the Data
(1) Preparation
1. Connect the projector of which MAIN PCB ASSY should
be replaced and the PC using the attached RS-232C
cable.
2. Start the PC and copy the “ChangePwbMAIN” folder
onto the desktop.
3. Double-click “LvpAdjDataComm_v4.exe” in the
“ChangePwbMAIN” folder to start the data transfer
program.
4. Click “ChangeCommPort” and select the port which is
connecting the personal computer and projector.
5. Select the model to use.
(2) How to read the factory adjustment data
6. When clicking “READ”, the data are automatically read.
If the error message “No response” is displayed, check
the connection between the personal computer and
projector or check the setting of Com Port. When the
data reading is completed successfully, “Correct” is
displayed. The adjustment data are saved as
“WriteData.txt” in the Setting folder.
(3) How to replace the MAIN PCB ASSY
7. Turn off the main power and replace the MAIN PCB
ASSY.
8. Turn on the main power again after replacing the MAIN
PCB ASSY and make sure that there are no errors
indicated.
(4) How to transfer the factory adjustment data
9. Click “WRITE” to write the data. When the data transfer
is completed successfully, “Correct” is displayed.
(5) Operation check
10. Turn off the main power and then turn it on again.
11. Press the “MENU,” “– ,” and “ENTER” buttons at the
same time.
12. Check the projector’s operation. When the MAIN PCB
ASSY has been replaced successfully, the projector
operates correctly.
Writes the factory
adjustment data from
the PC to the PCB.
Reads out the factory
adjustment data from
the PCB to the PC.
Selects the model.
Selects the COM port.
COM port No. being
connected.
Exits the application.
Main dialog window
COM port switching dialog window
