Panasonic 8420 Operating Instructions Manual

181 Care and Maintenance
Memory Shortage
Page SimplifiedNot enough memory to finish printing. 
Change printing resolution to 600 x 600 dpi if 
you selected higher resolution. 
or 
Install additional memory in the printer.
Middle Tray
EmptyAdd media to Middle tray.
Middle Tray
Not installedInstall Middle tray.
Multi-Purpose Tray
EmptyAdd media to multi-purpose tray.
NVRAM Error
Settings ChangedNVRAM hardware error. Cycle Power. If 
printer does not function normally, call for 
service.
NVRAM Full
Settings...

182 Care and Maintenance
Paper Feeder
Not installedInstall paper feeder.
Parallel I/O 
Buffer OverflowNot enough memory to finish printing. 
PJL Operations 
FailedError in PJL code. Resend print job to the 
printer.
Press Enter to
Initialize DiskPress the Enter button to initialize a new 
hard disk. This message will also appear if 
the hard disk has malfunctioned, or if the 
hard disk is the incorrect type. If this error 
appears after cycling power to the printer, 
contact an authorized service...

183 Care and Maintenance
Some operation errors cause the error indicator to blink and printing to stop. 
A message will be displayed on the front panel until the problem is fixed. If 
the front panel message includes the instruction, Call for Service, contact 
an authorized service representative.
In addition, if the following conditions occur, turn off and unplug the printer 
from the outlet and contact a qualified service representative:
•The power cord or plug is damaged or frayed.
•Liquid has been...

184 Care and Maintenance
Repacking
It is highly recommended that you keep the original carton and ALL packing 
materials. Should you need to transport or ship your printer, please follow 
these instructions.
SAFETY CAUTION:
•The printer weighs about 48.2 kg {106.2 lbs.}. It must be handled by two 
people.
NOTES:
•Should you need to send your printer for service, consult your reseller first 
or Panasonic.
•Please use the original carton and all of the original packing materials.
•If you do not have the...

185 Care and Maintenance
To prepare the printer for repacking:
1Turn off the printer; remove the power cord and all 
interface cables.
2Remove the media tray(s) from the printer; remove the 
media from the tray(s).
3Press down on a media tray’s metal plate. Place the 
cardboard packing material into the media tray.
4Reinsert the media tray into the printer; use adhesive 
tape to secure the tray to the printer.
5If you have other media trays, repack them for shipping 
or storage in their original shipping...

186 Care and Maintenance
6a) Open the printer’s front door.
b) Loosen the two thumbscrews by turning them 
counterclockwise.
c) Turn the lower green lever 180° counterclockwise.
7a) Grasping the front green handle, slide the unit out 
until it catches.
b) Lift up the green handle on the left and pull the 
imaging unit out of the printer.
IMPORTANT:
•Do not touch the green surface (the right side) or the black belt 
(the under side). Finger prints may affect the print quality.
SAFETY CAUTION:
•The imaging...

187 Care and Maintenance
8Wrap the imaging unit with a protective black plastic 
sheet.
CAUTION:CAUTION:
•Do not expose the imaging unit to light for more than 45 seconds 
to avoid damage.
9On the imaging unit, turn the upper lever 90° 
counterclockwise; this is necessary to protect the 
imaging unit during shipment. 

188 Care and Maintenance
10Insert the imaging unit into the packaging.
11a) Open the left side door.
b) Slide the paper feeder out, using the green handles.
a b 

189 Care and Maintenance
12a) Push in on green tabs to unlock the cover.
b) Raise the cover until it catches in the open position.
13a) Rotate the transfer unit’s green handles up.
b) Lift out the transfer unit.
14Place the transfer unit on newspaper or drop cloth. 
Rotate the handles down and wrap the transfer unit with 
a piece of paper and adhesive tape.
NOTE:
•Do not touch or bump the roller: it can damage the roller.
a
b
a
a b 

190 Care and Maintenance
15Install the plastic cover and insert the transfer unit into a 
plastic bag and seal the end tightly. Install the transfer 
unit into the packaging.
To pack the toner cartridges:
1a) Open the right side door.
b) Remove a toner cartridge.
CAUTION:CAUTION:
•To avoid possible toner spillage, do not tilt the cartridge.
2a) Replace the shipping cover.
b) Secure the shipping cover with adhesive tape.
Plastic cover
Plastic bag
a b
ba