Fujitsu DL7600Pro User Manual page 198

TROUBLE-SHOOTING
7-2
Table 7.1 Print Quality Problems and Solutions
Problem
Printing is too light or
too dark.
Stains or smudges
appear on the page.
The page is blank.
Solution
Make sure that the ribbon cartridge is
properly installed and that the ribbon feeds
smoothly.
Check ribbon wear. Replace the ribbon if
necessary.
Check the difference of thickness of
medium. If auto adjustment function detects
difference level of medium, it doesn't work
properly. In this case you must adjust for
paper thickness manually. See ADJUSTING
PAPER THICKNESS in Chapter 3.
If you adjust for paper thickness manually,
tune-up as follows.
If printing is too light, decrease setting.
If printing is dark, increase setting.
Note
Printer accepts the value for paper thickness
from Printer Driver or application program.
In this case, check the setting of the Printer
Driver or application program at your host
computer. And then tune the value by way
above.
Check ribbon wear. Replace the ribbon if
necessary.
Check whether the tip of the print head is
dirty.
Clean the head with a soft cloth if necessary.
Make sure that the ribbon cartridge is
properly installed.
User's Manual