Panasonic UF-790 - Manual (Page 138)

Troubleshooting
138
If you find toner on the back of the recording paper, the printer roller in the fuser unit is probably dirty.
NOTE 1. If you have installed the optional cassette(s), load the Cleaning Charts into the upper cassette.
Cleaning the Printer Roller
To clean the Printer Rollers
1
MAINTENANCE (1-9)
ENTER NO. OR
∨ ∧
2
The machine will print out 3 Cleaning Charts.
Then, return to standby.
* PRINTING *
CLEANING CHARTS
3 Load the Cleaning Charts into the cassette face down.
(See Note 1)
4 MAINTENANCE (1-9)
ENTER NO. OR
∨ ∧
5
The Machine will feed out the charts and clean the printer roller.
* CLEANING *
PRINTER ROLLER
7 8
1 1
<PRINTER ROLLER CLEANING CHART>
HOW TO LOAD THE CLEANING CHARTS
1.REMOVE THE PAPER CASSETTE
(If multiple cassette configuration, REMOVE THE UPPER PAPER CASSETTE)
2.SET THESE 3 CLEANING CHARTS IN THE CASSETTE FACE DOWN
3.RE-INSTALL THE PAPER CASSETTE
4.PRESS [FUNCTION][7][8][SET][1][SET][2]
TO START CLEANING
5.DISPOSE OF THE CLEANING CHARTS
*** SET THIS END TOWARDS THE FRONT, FACE DOWN ***
7 8
1 2