Panasonic Color Laser Printer Kx P8420 Operating Instructions

161 Care and Maintenance
9a) Turn the fuser’s large green knob clockwise.
b) Remove the jammed media.
10a) Remove the jammed media.
b) Replace the cleaning pad.
a b
ab 

162 Care and Maintenance
11a) Replace the oil supply roll into the fuser.
b) Press down firmly on the oil supply roll to snap both 
sides into place.
NOTE:
•If the oiled cloth is loose, rotate the gear (A) clockwise until it is 
tight. Do not touch the oiled cloth.
CAUTION:CAUTION:
•If the oil supply roll is not installed correctly, print quality will be 
diminished.Oiled cloth
a
b b
A
Oiled cloth 

163 Care and Maintenance
12a) Open the front door.
b) Slide the fuser back into the printer.
13a) Turn the small green thumbscrew clockwise to lock 
the fuser. 
b) Close the front door.
b
a
a
b 

164 Care and Maintenance
To clear media jams in location D with face down printing:
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.
NOTE:
•First check the exit opening for media that has jammed and folded like an 
accordion. It is especially difficult to see if the media is transparency film.
1a) Open the front door. 
b) Pull open the access door (above the plastic output 
tray);...

165 Care and Maintenance
CAUTION:CAUTION:
•If the fuser knob will not turn, do not force it, or you may damage 
the fuser. Instead, follow these steps:
a) Unlock the fuser by turning the small green thumbscrew 
counterclockwise.
b) Pull the fuser out. The media will probably tear.
c) Remove the oil supply roll.
d) Turn the fuser’s large green knob to release the jammed 
media.
e) Remove the jammed media from the fuser and the printer.
SAFETY CAUTION:
•The fuser is hot; to avoid personal injury, turn off...

166 Care and Maintenance
To clear media jams in location E:
1Remove the jammed media from the output tray.
2Open and close the front door to clear the error 
message from the front panel.
To clear jams with the multi-purpose tray:
1Remove the jammed media from the multi-purpose tray.
2Open and close the front door to clear the error 
message from the front panel. 

167 Care and Maintenance
Troubleshooting
TroublePossible CauseCorrective Action
Ready indicator is 
blinking.The printer is 
receiving, processing 
or printing job.Wait for the job to be 
completed or cancel 
the job.
You have entered the 
Menu mode in the 
printer panel.Exit the Menu mode 
by pressing the Menu/
Exit button.
The printer is 
networked and 
WebTools are being 
accessed.Wait for the job to be 
completed.
Ready indicator is off. The printer is not 
ready, is disabled, or 
has detected an...

168 Care and Maintenance
Half tone area has 
areas of weak color.Paper doesn’t match 
the environmental 
conditions, or it has 
too much moisture.Try fresh paper, or 
another type of paper.
Store media in the 
original, dust-free 
package in the same 
environmental 
conditions as the 
printer.
A single color appears 
faded.The color density is 
set incorrectly in the 
printer panel.See “Chapter 7 Color 
Calibration”.
The toner is almost 
depleted.Replace the color 
toner cartridge soon 
(depending on the...

 
169 Care and Maintenance 
A single color shows a 
light, repeating 
horizontal line.The roller in the toner 
cartridge has a slight 
impression after a 
long period of 
storage.Run 20-30 prints. The 
impression will 
disappear with 
continued time and 
use.
Prints are missing fine-
line detail.The color imaging unit 
has reached its useful 
life.Replace the color 
imaging unit.
Dark color spots and 
dark or light streaks 
appear in all colors. The color imaging unit 
has reached its useful 
life.Replace...

 
170 Care and Maintenance 
A single white spot 
appears in 
approximately the same 
vertical place on the 
page.The color imaging unit 
is damaged.Replace the color 
imaging unit.
Large light spot(s) 
appear randomly.Fingerprint(s) on the 
underside belt or 
photosensitive belt 
(inside) of the color 
imaging unit.Print several pages 
until the spots fade.
One or more dark 
vertical lines appear on 
the print in all colors.The color imaging unit 
is scratched.Replace the color 
imaging unit; make 
sure...