LP 400  (260-2888)          Replacing Consumables      Faxback Doc. # 4064

This printer uses the following items as part of the normal operation of a
laser printer.:

   Drum Unit (26-2895)
   Toner Cartridge (26-2894)
   Developer (26-2897)
   Ozone Filter (From National Parts HC-0924)

NOTE: If the Toner Cartridge is not available, the following model/brand
      may be substituted:

      AT&T 593
      EPSON EPL 6000
      FACIT P600
      PACKARD BELL PB950
      TEC 1305/1306
      LASER 600

This section describes replacement intervals for consumables (toner
cartridge, drum unit, ozone filter, and so on).

Replacement Intervals:

The following list shows the approximate intervals the consumables need to
be changed.

Initial toner cartridge--750 pages (if an average 5% of each page is
                         covered with print) 1000 pages (4% print)

Replacement toner cartridge--1,500 pages (5% print) 2000 pages (4% print)
and cleaning pad             TONER EMPTY appears on the display.

Drum unit and drum counter--10,000 pages CHANGE DRUM appears on the display
                            or the POWER/DRUM LIFE indicator lights red.*

Ozone filter--10,000 pages  CHANGE DRUM appears on the display or the
              POWER/DRUM LIFE indicator lights red.*

* The POWER/DRUM LIFE indicator changes its color from green to orange
  (7,500 copies) to red (9,900 copies), indicating the drum life is close
  to its end.  At 10,000 copies, the printer stops and displays CHANGE
  DRUM.  Press ON LINE to print 100 more sheets.  From copy 10,000 to
  10,090, press ON LINE each 10 copies.  From copy 10,091 to 10,100, press
  ON LINE for each copy or two.

  Order a new drum unit as soon as the POWER/DRUM LIFE indicator changes to
  orange.

  Always replace the drum unit and drum counter at the same time.

┌─────────────────────────────┐
│Installing the Cleaning Pad: │
└─────────────────────────────┘

1. Push the release latch to open the top cover.
2. Remove the cleaning pad from its protective bag and install it in the
   heater unit's slot.

┌───────────────────────────────────────────────────────────────┐
│Installing the Drum Unit, Developer Unit, and Toner Cartridge: │
└───────────────────────────────────────────────────────────────┘

Remove the drum and developer with toner cartridge from their protective
bags and install them as follows:

1. Shake the developer unit horizontally four or five times.
2. While holding the top of the toner cartridge, pull out the film.

Note: Toner might stick to the film.  Toner is not harmful to the human
body, but if any gets on you, immediately brush it off.  Since toner cannot
be easily removed, be careful not to stain your clothes, furniture, or
other items with toner.

3. Take out the new drum unit and clean the charger wire with the supplied
   charger cleaner.  Take care not to damage the charger wire.
4. Hook the drum unit onto the developer unit.  Set the shafts on the drum
   unit into the slots on the developer unit.

Notes:

* Do not leave the drum unit outside the printer for extended periods.  The
  drum's photosensitive properties might be affected, causing abnormally
  light or dark print areas.
* Do not touch or damage the drum surface and magnet roller.  Damage to or
  dirt on these parts will result in poor print quality.  The drum surface
  cannot be cleaned.
* When placing the drum unit on a table, place it on a flat surface to
  avoid damage to the drum surface.

5. Insert the drum counter.  Press it in until you see the red line pointed
   to by the arrow.  The printer cannot operate unless you install the drum
   counter.
6. Align the positioning shafts on either side of the developer unit with
   the base frame, then install the developer block.
7. Press down on both green handles at the same time until the developer
   block clicks into place.
8. Close the top cover.  Push only on the center when closing the cover.

┌────────────────────────────┐
│Replacing the Ozone Filter: │
└────────────────────────────┘

The ozone filter is mounted on the right frame inside the printer.  Replace
the ozone filter every year.  When printing a large amount, we recommend
replacing the ozone filter more often.  If you smell ozone from the
printer, immediately replace the ozone filter.

Follow these steps to replace the ozone filter.

1. Open the top cover and remove the developer block from the printer.
2. Open the ozone filter case on the right frame inside the printer and
   remove the ozone filter.

WARNING: The ozone filter is a fragile part.  Take care not to damage the
ozone filter when replacing it.

3. Mount a new ozone filter and close the ozone filter case.
4. Install the developer block in the printer and close the top cover.

(dtc/BKL-06/19/96)