Cause What to do
For Windows users only
The print data is too large.
Click Advanced on the PostScript sheet of the printer’s Properties,
then change the Data Format setting from ASCII data (default) to
TBCP (Tagged binary communications protocol).
When the Binary setting is set to On, TBCP is not available. Use the
Binary protocol. See “PS3 Menu” on page 154 for details.
For Windows users only
Printing cannot be performed using the network
interface.
Click Advanced on the PostScript sheet of the printer’s Properties,
then change the setting from ASCII data (default) to TBCP (Tagged
binary communications protocol).
When the Binary setting is set to On, TBCP is not available. Use the
Binary protocol. See “PS3 Menu” on page 154 for details.
An undefined error occurs (Macintosh only)
Cause What to do
The version of the Mac OS that you are using is
unsupported.
This printer’s driver can only be used on Macintosh computers
running Mac OS X version 10.3.9 or later.
Scanning Problems
Scanner operational problems
You cannot scan using the Auto Document Feeder
❏ Make sure you have selected either Office Mode or Professional Mode in Epson Scan. See
“Changing the scan mode” on page 69 for instructions.
❏ Make sure Auto Detect (Office Mode only), ADF, ADF - Double-sided, or ADF - Single-sided
is selected as the Document Source setting in Epson Scan. See “Scanning in Office Mode using the
Auto Document Feeder” on page 71 or “Scanning in Professional Mode using the Auto Document
Feeder” on page 77 for instructions.
❏ If the document cover or ADF cover is open, close it and try scanning again.
Epson AcuLaser MX21/MX20 Series User's Guide
Troubleshooting 241
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