Canon MF4200 用户手册

3-3

If you connect the machine to a USB 2.0-equipped 
computer using a USB 2.0-compatible USB hub, 
you may not be able to scan. In this case, connect 
a USB cable directly to the computer.

If you connect the machine to a USB 2.0-equipped 
computer, you may not be able to scan. If your PC 
is equipped with two or more USB ports, try 
connecting the machine to another USB port. If the 
problem persists, follow the procedure below to 
modify the INI file. It is recommended to make a 
backup copy of the file before making any changes 
to it.
1. Open the following file in Notepad or another text 

editor application.
Windows 2000:

winnt\system32\CNCMFP32.INI

Windows XP/Vista:

windows\system32\CNCMFP32.INI

2. In the [ScanSize] section, change 

“Read512Bytes=0” to “Read512Bytes=1,” then 
save the file. Take care not to modify any other 
parts.

Choose between placing the document on the 
platen glass or in the ADF.

The TWAIN system file is replaced with something 
inappropriate and you will be unable to scan 
images. If this happens, remove the software, then 
reinstall it. (See “Software Settings with Computer,” 
in the Starter Guide.)