Panasonic 8420 Operating Instructions Manual

151 Care and Maintenance
NOTE:
•If you print with high density when Low  Toner is displayed, you 
may get faded printout before  Toner Empty is displayed.
*
4When you have just replaced Transfer unit, you must select Yes in the New 
Transfer Unit menu. See “Maintenance” on page 152.
Printer componentPrinter panel messageAverage life
Transfer unit*
4
Change the Transfer unit 
soon.80,000 pages
Transfer wearing out 

 
152 Care and Maintenance 
Displaying the life of supplies and coverage of toner 
This menu shows how much percentage of each consumable life remains to 
be used. Please note that the values shown here is just the approximate 
value and are not always correct. So the consumable wearing warning 
message might occur regardless of the displayed values.  
Page Count  
—It shows the pages your KX-P8420 has printed since your 
purchase of the printer.  
Toner Cartridge  
—It shows the percentage of CYAN,...

 
153 Care and Maintenance 
Last  
—It shows the percentage of the whole printable area covered by each 
toner in the previously printed page. This menu cannot show the value 
correctly just after the printer was turned on. 
• 
CYAN: ###% 
• 
MAGENTA: ###% 
• 
YELLOW: ###% 
• 
BLACK: ###%  
Average  
—It shows the average percentage of the printable area of all 
pages printed covered by each toner. 
• 
CYAN: ###% 
• 
MAGENTA: ###% 
• 
YELLOW: ###% 
• 
BLACK: ###% 
Clearing media jams 
If the printer has...

154 Care and Maintenance
To clear media jams in location A:
1Open the left side door corresponding to the selected 
media tray and remove the jammed media.
2Close the left side door.
OR
1Remove the media tray.
2Remove the jammed media from inside the printer.
3Reinsert the media tray.
4Open and close the front door to clear the error 
message from the LCD. 

155 Care and Maintenance
To clear media jams in the 2nd cassette feeder:
1Open the lower left side door.
2Remove the jammed media.
3Close the lower left side door.
OR
1Remove the selected media tray (middle or lower media 
tray). 

 
156 Care and Maintenance 
2 
Remove the jammed media from inside the printer. 
3 
Reinsert the media tray. 
4 
Open and close the front door to clear the error 
message from the LCD. 
To clear media jams in location B with multi-purpose tray: 
1 
Remove the jammed media from the multi-purpose tray. 
2 
Open and close the front door to clear the error 
message from the front panel.
NOTE:
 
•
 
A few sheets of paper printed after clearing media jam may be dirty.
 
To clear media jams in location B with...

 
157 Care and Maintenance 
2 
Use the green handles to pull out the paper feeder. 
3 
Remove the jammed media on the paper feeder. 
4 
Reinsert the paper feeder and close the left side door. 
To clear media jams in location C: 
1 
a 
) Open the printer front door. 
b 
) Turn the fuser’s large green knob counterclockwise 
and remove the jammed media. 
The jammed media will go out from inside the printer.
If the jammed media does not go out, proceed to the step 4. 
.
SAFETY CAUTION:
 
• 
The fuser is hot;...

 
158 Care and Maintenance 
2 
Clear the error message from the LCD. 
a 
) Turn the small green thumbscrew counterclockwise 
to unlock the fuser. 
b 
) Holding the green tab on the right, slide the fuser out 
until the safety catch stops it. 
c 
) Slide the fuser back into the printer. 
3 
Turn the small green thumbscrew clockwise to lock the 
fuser. 
You do not need to proceed to the following steps, if a media jam is 
cleared. 
4
Turn the small green thumbscrew counterclockwise to 
unlock the fuser.
....

159 Care and Maintenance
5a) Holding the green tab on the right, slide the fuser out
until the safety catch stops it.
b) Press the green lever on the left to release the safety 
catch.
6a) Hold the fuser as shown below, and slide it out of the 
printer.
b) Close the front door.
SAFETY CAUTIONS:
•The fuser unit weighs approximately 3.1 kg {6.8 lbs.}. Take care 
when handling it.
•Do not touch the roller and the parts around the roller when 
handling the fuser, because they may be hot.
a b
b
a
Roller 

160 Care and Maintenance
7Remove the oil supply roll.
a) Press out on tabs to unlock the oil supply roll.
b) Remove the oil supply roll out of the fuser.
NOTE:
•If the paper is not jammed in the fuser unit, perform the following. 
1. Repeat steps 1 to 4 of the procedure on page 156-157.
2. Skip the steps 8 to 10 and go to step 11.
8Remove the cleaning pad, holding the tabs.
b
a
a
The shape of a 
cleaning pad is 
subject to change.
Cleaning pad