Canon FB320P ユーザーズマニュアル

Cause:

Scanner employs an ultra-sensitive scanning unit that picks up
ambient light if document cover cannot stop light from enter-
ing around the edges of the book

Solution:

Cover the book and document glass with a dark cloth to pre-
vent ambient light from affecting the scan

Cause 1:

Improper parallel port setting

Solution:

Cause 2:

Computer can only interface with the scanner with the parallel
port setting set to the slowest mode (Nibble mode)

Solution:

Faster speed not obtainable with current computer

Cause 3:

Epson Printer Window in use for Epson printer

Solution: