Troubleshooting
OPERATION GUIDE
10-5
10
Cannot print with USB
memory.
Was the USB memory
formatted with a machine
other than this machine?
Format the USB memory with this
machine.
6-20
Is the USB host blocked?
Select
Unblock
in the USB host
settings.
8-72
Check that the USB memory
is securely plugged into the
machine.
—
—
When displaying an
image sent from the
machine on the PC, an
image size is shrunk
vertically or
horizontally.
Have you selected
200×100dpi Normal or
200×400dpi Super Fine for
the scan resolution?
Select a scan resolution other than
200×100dpi Normal or 200×400dpi
Super Fine when sending an
image.
—
USB memory not
recognized.
Check that the USB memory
is securely plugged into the
machine.
—
—
Is the USB host blocked?
Select
Unblock
in the USB host
settings.
8-72
Perform Gray
Adjustment in the
System Menu.
is
displayed.
Over long periods of use, the
effects of the ambient
temperature and humidity
can cause color output hues
to vary slightly.
Whenever the printed hues differ
from the original document or
image, carry out Gray Adjustment.
8-46
Performing Color
Calibration...
appears
during continuous
copying and copying
stops.
The machine is carrying out a
calibration process to ensure
color stability.
This is not a fault.Resume
continuous copying when the
calibration process ends.
8-46
White or color streaks
appear on prints.
The inside of the machine
may be dirty.
Carry out Laser Scanner Cleaning.
8-47
Symptom
Checkpoints
Corrective Actions
Reference
Page
Summary of Contents for TASKalfa 420i
Page 22: ...xx OPERATION GUIDE ...
Page 72: ...Preparation before Use 2 34 OPERATION GUIDE ...
Page 160: ...Copying Functions 4 38 OPERATION GUIDE ...
Page 310: ...Default Setting System Menu 8 78 OPERATION GUIDE ...
Page 324: ...Maintenance 9 14 OPERATION GUIDE ...
Page 354: ...Troubleshooting 10 30 OPERATION GUIDE ...
Page 382: ...Management 11 28 OPERATION GUIDE ...
Page 385: ...OPERATION GUIDE Appendix 3 B1 A2 DP OP T1 Key Counter FAX Kit Expansion Memory ...
Page 414: ...Appendix 32 OPERATION GUIDE ...
Page 424: ...MEMO ...
Page 425: ...MEMO ...
Page 426: ......
Page 427: ......
Page 428: ...First edition 2009 7 Printed in China 302KR56040 ...