LP 950  (260-2838)        Cartridge Replacement        Faxback Doc. # 4383

The POC, developer, and toner cartridges require periodic replacement. To
obtain new cartridges, contact your Radio Shack Store.

Replacing the Toner Cartridge Kit (260-2841):

CAUTION:
There is a fuse installed on the POC Toner Unit. This fuse is used by the
printer logic to determine that a new unit has been installed. After the
new unit is installed, the fuse will be purposely blown after about
1 second. Do not replace the fuse as a new fuse is installed on every
new Toner Kit.

Replace the toner cartridge when REPL. TONER KIT appears on the display.
To maintain optimal print quality, replace the toner kit as soon as soon as
possible.

The toner cartridge should last for approximately 3000 pages. The actual
life of the cartridge varies depending on the number of graphics and large
fonts your documents contain.

A new roller cleaner and toner-collecting container are supplied with each
toner cartridge kit. Replace them before installing the new toner cartridge.

If you do not replace the toner-collecting container, the REPL. TONER KIT
message will continue to appear even after you replace the toner cartridge.

CAUTION: Failure to replace these components can damage the LP 950.

1. Press the button on the printer's top cover to open the printer.
2. Remove the used roller cleaner from the fusing unit.
CAUTION: 
* The black fusing unit is hot. Handle the cleaner only by the green tab.
* Do not touch the POC drum.
3. Install the new roller cleaner in the fusing unit.
4. Remove the full toner-collecting container and install the need container.
   Carefully place the used container in the new container's plastic shipp-
   ing bag. Seal the bag and properly dispose of the used container. Be 
   careful not to spill used toner into the LP 950.
5. Lift the green locking tab on the developer cartridge and carefully pull
   the old toner cartridge toward you to remove it from the developer
   cartridge.
6. Shake the new cartridge horizontally four or five times to loosen the
   toner.
7. Align the new toner cartridge's hooks with the slots in the developer
   cartridge. Push in the toner cartridge and secure it with the green tab.
8. Firmly hold the toner cartridge and remove the sealing tape from the
   slot on the right side of the cartridge. Tap the cartridge several times
   to release the toner.
9. Close the printer.

Replacing the Developer Cartridge (260-2843):

REPL. DEVELOPER appears on the display a few thousand copies before you must
replace the developer cartridge. After this message appears, replace the
developer cartridge the next time you replace the toner cartridge.  It is 
not possible to replace the developer cartridge separately. The developer
cartridge should last for approximately 25,000 pages.

1. Press the button on the printer's top cover to open the printer.
2. Hold both green levers on the developer cartridge and remove the toner
   and developer cartridges together.
3. Place the empty toner and developer cartridges in the new cartridge's
   shipping bag. Seal the bag and properly dispose of the old materials.
4. Shake the new developer cartridge horizontally several times.
5. Hold the developer cartridge firmly on a level surface and remove the
   covering material. Do not touch the developer roller. Do not remove
   the sealing plate on the other side of the developer cartridge.
6. Hold the developer cartridge by the green handles and slide it along the
   guides into the printer until it stops.
7. Remove the tape that secures the sealing plate. Then, pull out the 
   sealing plate.
8. To replace the toner cartridge now, follow the previous procedure,
   "Replacing the Toner Cartridge".
9. Close the printer.

Replacing the POC Cartridge (260-2842):

Replace the POC cartridge when REPL. PHOTO DRUM appears on the display.
The POC cartridge should last for approximately 50,000 pages.

1. Press the button on the printer's top cover to open the printer.
2. Hold the green levers on the developer cartridge and remove the toner 
   and developer together.
3. Grasp the old POC cartridge's frame and pull it out along the guides.
4. Locate the green ozone filter cover on the underside of the printer's
   top cover. Turn the green cover clockwise and remove the ozone filter.
5. Install the new ozone filter and re-install the green cover.
6. Hold the new POC cartridge with the drum facing down and carefully slide
   it along the guides until it stops.
CAUTIONS:
* Avoid exposing the POC drum to bright light.
* Do not touch the drum itself.
7. Firmly hold the POC cartridge and pull the green tab to remove the
   protective sheet.
8. Reinstall the developer and toner cartridge.
9. Close the printer.

(css 07/27/93)