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, MAGENTA, YELLOW 
and BLACK toner cartridges remaining. 
• 
CYAN : ###%Remaining 
• 
MAGENTA : ###%Remaining 
• 
YELLOW : ###%Remaining 
• 
BLACK : ###%Remaining
NOTE:
 
• 
If you replace the toner cartridge before   
Low  Toner  
 or   
 
Toner Empty  
 is displayed, the value of the toner cartridge remaining will 
be incorrect.  
Imaging Unit  
—  
###% remaining  
 shows the percentage of the life of color 
imaging unit remaining.  
Transfer Unit  
—It shows the percentage of the Transfer unit remaining. 
• 
###% remaining
It shows the percentage of the Transfer unit remaining. 
• 
New Transfer Unit (No/Yes)
You must select   
Ye s  
 when you have just replaced Transfer unit. 
The life will be reset to 100% remaining by selecting   
Yes  
.  
Fuser Unit  
—  
###% remaining  
 shows the percentage of the Fuser unit 
remaining.  
Oil Roll  
—  
###% remaining  
 shows the percentage of the Oil roll remaining.
Maintenance 
						

							 
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 frequent media jams, make sure that you follow these 
guidelines: 
• 
Always use high-quality laser paper and transparencies. See pages 207 
and 209. 
• 
Make sure that you load specialty media only in the multi-purpose tray 
and that you set the media thickness switch to the correct setting for the 
media used.
If a media jam occurs, the printer panel reports  
JAM AT  
, where  
 
 are the various sensors throughout the paper path, shown as 
A through E in the illustration below.
Image Area
2nd cassette feeder (option)
Jam in location D 
(See page 164.)
Jam in location E 
(See page 166.)
Jam in the MPT 
(See page 166.)
Jam in location A 
(See page 154.)
Jam in location B 
(See page 156.)
Jam in location C (See page 157.) 
						

							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 media tray: 
1 
Open the left side door. 
						

							 
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; to avoid personal injury, turn off the printer and 
wait 10 minutes (after opening the front door) for the fuser to cool 
before touching it.
ab 
						

							 
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.
.
b
a
c
CAUTION:
HOT SURFACE INSIDE 
						

							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