The Pc Does Not Recognize The Scanner; Scanning Is Slow - Canon imageFORMULA CR-25 Startup Startup Manual

The PC Does Not Recognize the Scanner

The following are possible causes of the PC failing to recognize the scanner.
Check each possible cause.
Cause The scanner is not connected correctly.
Remedy Check the USB cable connections between the scanner and the
PC. (See p. 22.)
Cause The USB 2.0 interface card is not inserted in the PC correctly.
Remedy
Reseat the USB 2.0 interface card in the PC correctly, referring to
the instruction manual for the USB 2.0 interface card. Also,
confirm whether the USB interface card is recognized by the
operating system you are using.
Cause The scanner is not ON.
Remedy
Refer to "The Scanner Does Not Turn ON," on p. 56 and make
sure that the scanner is turned ON. If the scanner is not turned
ON, turn it ON. (See p. 23.)
Cause The scanner dose not support your USB interface.
Remedy This product is not guaranteed to operate with all types of USB
interfaces. Contact your local authorized Canon dealer or service
representative for more information. (See p. 15.)
Cause The scanner does not support the USB cable.
Remedy Use the USB cable provided with the scanner. (See p. 22.)
Cause The scanner does not support the USB hub.
Remedy Remove the USB hub to use the scanner. (See p. 22.)

Scanning Is Slow

The following problems may affect the scanning speed.
Cause The USB port you are using does not support Hi-Speed USB 2.0.
Remedy
Scanning speeds are lower if your computer's standard USB
interface is not compatible with Hi-Speed USB 2.0. (See p. 15.)
Use a computer that is equipped with USB that is compatible
with Hi-Speed USB 2.0 as standard.
Cause The USB 2.0 interface cable does not support Hi-Speed 2.0.
Remedy Use the USB cable provided with the scanner. (See p. 22.)
Cause The USB hub does not support Hi-Speed 2.0.
Remedy Remove the hub or replace it with one that supports
Hi-Speed 2.0. (See p. 22.)
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Troubleshooting