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Troubleshooting
USB Host
1/13/2016 ZD420 User’s Guide 212485-001 Rev. A
USB Host
The USB host port allows you to connect a USB Flash drive to the printer to perform firmware
updates.
Figure 1 • USB Host Port Location
Important • The USB Flash drive must be formatted with the FAT file system.
Filenames may be 1 to 16 alphanumeric characters (A, a, B, b, C, c, ..., 0, 1, 2, 3, ...)
only.
Do not use Asian characters, Cyrillic characters, or accented characters in file names.
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