1
Hewlett Packard® LaserJet 4000 Cartridge Remanufacturing Instructions...
HP® 2100
Remanufacturing Instructions
Reference Information:
Approx. Remanufacturing
OEM P/N: C4096A
Time:
25 min.
OEM Yield: 5,000 pgs.
@ 5% coverage.
Materials Needed:
Tools Required:
Toner
Needle nose pliers
Drum (if needed)
#2 Phillips screwdriver
PCR (if needed)
# 1 Flat tip screwdriver
Hewlett Packard® 2100 Cartridge
Replacement mylars (if needed)
Razor knife
Wiper blade (if needed)
Lint-free cloth P/N: 99CL14
Cotton swabs P/N: 99CL23
99% Isopropyl Alcohol
Oasis Conductive Grease P/N: 99MS11
Oasis PCR Cleaner P/N: 99MS21
Instructions:
The Hewlett-Packard® LaserJet 2100 laser printer uses a typical HP cartridge
in that the toner hopper and the drum/waste hopper are located in one disposable
unit. The toner hopper contains the toner reservoir, the doctor blade, the toner
low sensor bar and the magnetic roller assembly. The drum/waste hopper
contains the drum, the wiper blade, recovery blade and the waste hopper. Also,
the retractable drum shutter is attached to the toner hopper and must be removed
to avoid damaging the OPC drum. The cartridge halves are held together by a
pair of retaining pins; one on each end of the cartridge. The retaining pins are
not tapered at the ends like the 4000, but cannot be pushed through because
they hit the end of the wiper blade.
Figure 1
Separating Cartridge Halves
1. In order to separate the two halves the pins must be removed. The pins in
the LJ2100 cannot be pushed in from the outside because the wiperblade
bracket is in the way (fig. 1).
2. Without making any modifications to the cartridge you will find that the drum
shutter door is not removable at this time. The waste hopper has a plastic
protrusion that inhibits the removal (fig. 2).
Figure 2
3. Pull back the OPC shutter and tape it back out of the way. Next pull the
axle pin out of the small gear side of the drum (fig. 3). Also it is a good idea
to remove the axle plate on the opposite side to prevent any damage to the
OPC on removal. After the two pieces have been removed, lift out the OPC
and inspect for damage. Replace if damaged (fig. 4)
Figure 3
Oasis Imaging Products, Inc. Technical Support: (888) 627-6555
2
Hewlett Packard® LaserJet 4000 Cartridge Remanufacturing Instructions...
Figure 4
4. Next remove the PCR. Be sure to grab it by the axle ends and not the rubber
coating (fig. 5).
Figure 5
5. Now you can see the two pins on either side of the wiperblade (fig. 6). Using
a flathead screwdriver you can pry the pins out far enough so they can be
pulled the rest of the way out using a pair of wire cutters.
Figure 6
6. When both pins are removed, separate the cartridge halves. Note: The drum
shutter is still in place, so use caution when separating the halves. Set the
toner hopper aside (fig. 7).
Figure 7
OPC/Waste Hopper
1. Clean, inspect and lubricate the drum; replace if necessary. Wrap the drum
in a clean, lint free cloth or store in a drum case to minimize light exposure.
2.
Apply a small amount of quality PCR cleaner to a clean, lint-free cloth and
gently wipe the entire surface of the PCR. Make sure any residual toner and/
or cleaner is completely removed to ensure that proper voltage is maintained.
3. Remove the two (2) screws securing the wiper (fig. 8). Then remove the
recovery mylar from the waste hopper. Clean out the hopper with com-
pressed air or a vacuum. Next, remove all adhesive from the recovery blade
mounting surface, and carefully apply a new recovery blade. Inspect,
lubricate and re-install the wiper blade; replace if necessary.
Figure 8
3
Hewlett Packard® LaserJet 4000 Cartridge Remanufacturing Instructions...
4. Clean the black PCR saddle clip with a cotton swab and 99% IPA (fig. 9).
This clip is conductive and supplies the current to the PCR. If it is dirty or the
PCR does not make good contact, print defects will occur. Re-install the PCR
and OPC. Rotate the OPC against the wiper blade and then remove residual
lubricant (padding powder) from the surface of the PCR with a clean lint-free
cloth. Any padding powder left on the PCR will cause print defects. Set
the drum unit aside and cover it with a clean cloth to protect it from light and
physical damage.
Figure 9
Toner Hopper
1. Gently pry the drum shutter arm from the right side of the cartridge being care-
ful not to lose the tension spring located in the receptacle at the top of the
arm (fig. 10). When the arm is free, remove it from the shutter clips and set it
aside (fig. 11). Now remove the silver retaining arm by gently pulling on the
left and right side out away from the toner hopper.
Figure 10
Figure 11
2. Place the toner hopper on the work area with the magnetic roller facing you.
Remove the two (2) screws from the left side of the cartridge (Fig. 12).
Next, remove the left end-cap in an up-right position to prevent the gears from
falling off (Fig. 13).
Figure 12
3. Carefully remove the magnetic roller by first lifting the left end of the roller and
then gently pulling it to the left. Note the location of all peripheral components
on the mag roller (bushings, brackets, etc. Use compressed air to remove all
residual toner from the surface of the mag sleeve and inspect for
damage. Set mag sleeve aside or replace if necessary.
Figure 13
4
Hewlett Packard® LaserJet 4000 Cartridge Remanufacturing Instructions...
4. Remove the two (2) screws holding the doctor blade in place (fig. 14).
Use compressed air or a vacuum to remove residual toner from the blade.
Inspect the mag roller mylar for damage and replace if necessary.
Figure 14
5. Clean the bias charge contact with a cotton swab and alcohol (fig. 15). At
this time, fill the hopper with toner through the mag roller slot or. If you are
going to split and seal the toner hopper, proceed to the hopper sealing section.
5. Re-install the doctor blade and secure with two (2) screws. Re-install the mag
sleeve (make sure you replace the nylon brackets and bushings on each side.
Note: Both ends of the mag roller are keyed and must be in the proper
Figure 15
position while reinstalling it. Once the mag sleeve and all peripherals are in
place, position the end cap on the left side and secure with two (2) screws.
6. Install the left and right ends of the silver shutter. Now align the tension
spring in the receptacle of the drum shutter arm: the far side of the
spring must press down into the shutter arm and the near side must rest
on the notch on the right side of the receptacle (fig. 16). Affix the drum
shutter arm onto the right side of the cartridge ensuring the exposed
end of the spring sits on the notch indicated (fig. 17). Pull arm back slightly
and slowly release the arm. The leading end of the
arm should snap forward
past the front of the hopper, if not; reseat the arm and try again. When the
spring and shutter arm are positioned properly, insert the piton at the end of
Figure 17
the shutter arm into the shutter clips.
7. Place the cartridge halves together and avoid damaging the springs on top of
the toner hopper. Align the pin holes on each side and insert the cartridge
pins to hold the halves together.
Figure 18
© 2001 Oasis Imaging Products, Inc. Any attempt to reproduce any part of these instructions without the written consent of Oasis Imaging
Products, Inc. may result in legal action. All registered trademarks are the property of their respective owners.