Troubleshooting table
9
9-8
d-Color MF651/551/451
9.2
Scanning does not start
Have you placed your finger cor-
rectly on the authentication unit?
Confirm how to perform authen-
tication and how to place your
finger when scanning. (p. 10-3)
During scanning, place the
scanned part on the scanning
section correctly, and do not
move it until results have been
obtained.
If the scanned part is dusty or
rough and dry when performing
authentication, a correct image
will not be able to be obtained,
and scanning may not finish.
Clean your finger, and then scan
it again, or improve the rough
and dry condition of your finger.
If the scanned part is too thick or
thin (when the finger width is out-
side the range from 10 to 25
mm), a correct image cannot be
obtained, and scanning may not
finish. Try "stretching your fin-
ger", "placing your finger deep-
ly", or "placing your finger
shallowly" on the scanning sec-
tion.
Did you restart this machine after
connecting the authentication
unit to this machine?
Turn off the main power of this
machine, disconnect the USB
cable from this machine or au-
thentication unit, and then con-
nect it again. Wait at least 10
seconds, and then turn on the
main power of this machine.
Connecting the authentication
unit to the computer starts the
hardware uninstall wizard
Is the USB port to which the au-
thentication unit is connected the
same as the one used when in-
stalling the driver?
If you connect the authentication
unit to a different USB port from
the one used when installing the
driver, the hardware uninstall
wizard may start. Use the same
USB port as the one used when
installing the driver.
When the "Failed to register"
message appears on this ma-
chine where registration fails
The scanning time of the authen-
tication unit is limited to 10 sec-
onds. If scanning does not finish
within the limited time, the corre-
sponding message appears.
To finish scanning within the lim-
ited time, confirm how to place
the IC card. (p. 11-3)
When a message appears on
the computer where registration
fails
When the "Failed to authenti-
cate." message appears on this
machine where login fails
When IC card authenti
password authentication is ena-
bled
Did you enter the correct pass-
word?
Check the password, and then
enter the correct one if not.
Scanning does not start
Did you restart this machine after
connecting the authentication
unit to this machine?
Turn off the main power of this
machine, disconnect the USB
cable from this machine or au-
thentication unit, and then con-
nect it again. Wait at least 10
seconds, and then turn on the
main power of this machine.
Description of problem
Check points
Remedy
Summary of Contents for d-color MF451
Page 1: ...COPY OPERATION d Color MF651 553603en GB d Color MF451 d Color MF551...
Page 9: ...1 Introduction...
Page 10: ......
Page 15: ...2 Part names and their functions...
Page 16: ......
Page 35: ...d Color MF651 551 451 2 21 2 3 Option 2 2 3 3 Z Folding Unit ZU 606...
Page 42: ...Option 2 2 28 d Color MF651 551 451 2 3...
Page 43: ...3 Using this machine...
Page 44: ......
Page 53: ...4 Control Panel Keys...
Page 54: ......
Page 74: ...The Proof Copy key 4 4 22 d Color MF651 551 451 4 11...
Page 75: ...5 Copy Function...
Page 76: ......
Page 139: ...6 User Settings...
Page 140: ......
Page 153: ...7 Administrator Settings...
Page 154: ......
Page 211: ...8 Maintenance...
Page 212: ......
Page 224: ...Cleaning procedure 8 8 14 d Color MF651 551 451 8 3...
Page 225: ...9 Troubleshooting...
Page 226: ......
Page 240: ...If print quality is deteriorated 9 9 16 d Color MF651 551 451 9 3...
Page 241: ...10 Authentication unit biometric type...
Page 242: ......
Page 261: ...11 Authentication unit IC card type...
Page 262: ......
Page 279: ...12 Specifications...
Page 280: ......
Page 299: ...13 Appendix...
Page 300: ......
Page 309: ...14 Index...
Page 310: ......
Page 320: ...Index by button 14 14 12 d Color MF651 551 451 14 2...