Canon FB620P - Manual (Page 66)

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Whitened edges on image scanned from thick book
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
Slow scanning speed
Cause 1: Improper parallel port setting
Solution: Adjust parallel port setting ( See p. 24 )
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: Close Epson Printer Window ( See p. 71 )