| Hewlett Packard's LaserJet 4200 and the LaserJet | | | | Note: The OEM sealing foam material is sticky and |
| 4300 series of printers were first released in | | | | is not easily removed. |
| November of 2002. They were both designed to | | | | Step #15: |
| replace the now discontinued Hewlett Packard | | | | Note: This step is only for the HP 4300. Using a |
| 4100 LaserJet printer. | | | | Dremel with a cutting bit cut away the retaining |
| Based on a new print engine, the 4200 and 4300 | | | | wall that prevents the wiper blade from being |
| series have increased print speeds of 35 ppm | | | | removed. |
| (pages per minute) for the 4200 and 45 ppm | | | | Step #16:oRemove the two screws holding the |
| (pages per minute) for the 4300 with an | | | | wiper blade. Then remove the blade. |
| improved first page out time of less than 9 | | | | Step #17:oDump the waste from the hopper. |
| seconds. | | | | Clean the hopper using dry compressed air or a |
| Wow, that is pretty fast. At a starting cost of | | | | vacuum. |
| about $1,000 for the base model 4200 and | | | | Step #18:oApply padding powder to the new |
| $1,399 for the base model 4300. These new | | | | wiper blade and place the blade onto the waste |
| printers are priced at the same cost as the | | | | hopper. Install the two screws that hold the blade |
| Hewlett Packard 4100 LaserJet printer. | | | | in place. |
| There are differences in the molding of the | | | | Step #19:oYou will now need to seal the area |
| cartridges which do prevent them from being | | | | around the wiper blade using expanding foam |
| interchangeable. One notable difference is in the | | | | along the edge of the blade and in the square |
| design of the toner hopper. | | | | holes on the ends. |
| The toner hopper on the HP 4300 is larger and | | | | Step #20:oClean the PCR saddles using a swab |
| holds 1,050 grams of toner for an estimated page | | | | and alcohol. |
| yield of. This will approximately perform 18,000 | | | | Step #21:oAt this point, you want to apply new |
| pages @ 5% coverage. | | | | conductive grease to the black contact saddle. |
| The smaller toner hopper on the HP 4200 holds | | | | Install the cleaned PCR. |
| only 690 grams of toner and yields approximately | | | | Step #22:oApply padding powder to the drum. |
| 12,000 pages @ 5% coverage. Another notable | | | | Slide the drive gear into the bearing hub. |
| difference is in the waste section. The waste | | | | Step #23:oInstall the contact end plate. |
| hopper of the HP 4300 is larger to hold the extra | | | | Note: Make sure the contact plate sits flush with |
| waste produced by the higher fill weight. | | | | the end of the waste hopper. |
| The HP 4200 waste hopper also has a fin sticking | | | | Step #24:oInstall the screw that holds the contact |
| up on the left side of the hopper that prevents | | | | plate in position. |
| the cartridge from fitting into the HP 4300 | | | | Step #25:oPlace the waste hopper aside in a |
| LaserJet printer. | | | | protected area out of the light. |
| Due to the fact that the 4200 and the 4300 both | | | | Step #26:oRemove the mag roller drive gear |
| use the same print engine, the components that | | | | housing from the end of the toner hopper. Then |
| make up the cartridges are the same. | | | | remove he mag roller drive. |
| The cartridge chips located on the top right side | | | | Step #27:oRemove the screw that holds the mag |
| of the waste hopper however, are in indeed | | | | roller end plate. |
| different. A slight difference in programming | | | | Step #28:oUsing needle nose pliers, simply |
| prevents one chip from being used on both | | | | remove the hinge pin from the mag roller end |
| cartridges, so it's important to use the correct | | | | plate. |
| chip when remanufacturing the cartridge. | | | | Step #29:oRemove the mag roller tension spring. |
| Though the chip is physically different than that of | | | | Step #30:oPull the mag roller end plate from the |
| the HP 4100, the information that the chip | | | | toner hopper. |
| contains is nearly the same. | | | | Note: Do not lose the bearing that sits inside the |
| A few additional items like First Installed Date and | | | | mag roller end plate. |
| Last Date Used are one-stored chips. This | | | | Step #31:oLift the free end of the mag roller |
| information is displayed at the bottom of the | | | | sliding the roller out of the mag roller end plate on |
| Supplies Status Page. | | | | the opposite side of the toner hopper. |
| Just like the HP 4100, 4200 and the 4300, all can | | | | Note: Do not lose the bearing that sits inside the |
| be run with a spent chip or with no chip installed | | | | mag roller end plate. |
| at all. | | | | Step #32:oRemove the mag roller bearings from |
| Several testing have shown that the chip can be | | | | the each end of the roller. Clean the mag roller |
| run again in the printer that it was used in | | | | using dry compressed air or vacuum, then using a |
| originally. Running the used chip causes a "Replace | | | | lint free cloth and a mag roller cleaner. Clean the |
| Cartridge" message and the loss of the toner low | | | | mag roller bearings and use a lint free cloth. |
| warning. | | | | Step #33:oRemove the two screws holding the |
| Usage of the chip in a machine other than the one | | | | doctor blade. |
| it was previously running in will result in a "Non-HP | | | | Step #34:oLift the plastic scrapers and mylar |
| Cartridge Detected" message and the loss of all | | | | shims off each end of the doctor blade. |
| the information on the Supplies Status Page. | | | | Step #35:oLift the doctor blade from the toner |
| While running the cartridge without the chip, it will | | | | hopper. If you plan on using the doctor blade |
| result in a "10.10.00 Supplies Memory Error" when | | | | again, clean the doctor blade using dry |
| the cartridge is first installed. | | | | compressed air or a vacuum, then using a lint |
| After pressing the Select button a "Non-HP | | | | free cloth and alcohol. |
| Cartridge Detected message will appear before | | | | Step #36:oDump the old toner out of the toner |
| the machine goes to ready. All the information | | | | hopper. Using dry compressed air or a vacuum, |
| stored in the chip will not be available and a | | | | clean out the hopper. |
| "Warning" message is all you will find on the | | | | Step #37:oFill the toner hopper with the correct |
| Supplies Status Page. | | | | amount of toner depending on the cartridge type |
| Here are you Step-by-Step | | | | you are building. |
| "How-to-Remanufacture" the HP Q1338A/Q1339 | | | | Step #38:oPlace the new or cleaned doctor blade |
| Instructions: | | | | onto the toner hopper. Place the mylar shims and |
| Let's get straight to the point, no beating around | | | | the plastic scrapers on each end of the doctor |
| the bush during this lecture. | | | | blade. Install the two screws holding the blade in |
| First, you will need the necessary Tools & | | | | place. |
| Supplies Required: | | | | Step #39:oSlide the black mag roller bearing onto |
| Tools & Supplies Required:oDiagonal Cutters | | | | the contact end and the white bearing onto the |
| (tool)oPhillips Head Screwdriver (tool)oSmall Flat | | | | drive gear end of the mag roller. Slide the mag |
| Blade Screwdriver (tool)oDremel Tool with Cutting | | | | roller contact hub into the mag roller bearing plate |
| Bit (tool)oNeedle nose Pliers (tool)oPadding Powder | | | | on the toner hopper. |
| (supply)oSoft Lint Free Cloth (supply)oAnhydrous | | | | Step #40:oAlign the mag roller bearing end plate |
| Isopropyl Alcohol (supply)oSwabs (supply)oToner | | | | to the toner hopper and slide the end plate onto |
| (supply)oDrum (supply)oExpanding Foam | | | | the toner hopper. |
| (supply)oDoctor Blade (supply)oWiper Blade | | | | Step #41:oInstall the mag roller tension spring and |
| (supply) | | | | the screw into the mag roller bearing end plate. |
| Here you will also be provided with the OEM | | | | Step #42:oInstall the hinge pin into the mag roller |
| (original equipment manufacturer) information: | | | | bearing plate. |
| HP 4200:oPart Number: Q1338AoOEM Gram Load: | | | | Step #43:oSlide the mag roller drive onto the mag |
| 690 gramsoYield @ 5% coverage: 12,000 pages / | | | | roller. |
| min:35oResolution: 300/600/1200dpi (dots per inch) | | | | Note: Make sure the two injection molding points |
| HP 4300:oPart Number: Q1339AoOEM Gram Load: | | | | on the mag roller drive gear face outward. |
| 1025 gramsoYield @ 5% coverage: 18,000 pages | | | | Step #44:oPlace the mag roller drive gear housing |
| min:45oResolution: 300/600/1200dpi (dots per | | | | onto the end of the mag roller, making sure the |
| inch) | | | | keyed end of the magnet fits into the gear |
| Below are your 53 easy steps to know how to | | | | housing. |
| remanufacture your HP 4200/4300 LaserJet | | | | Step #45:oUsing a 3/32-drill bit, drill a hole next to |
| Q1338A/Q1339A toner cartridges. | | | | the toner sensing contact on the cartridge |
| Step #1:oPlace the cartridge on the worktable | | | | contact end cap. |
| with the drum facing upward and the drum | | | | Step #46:oJoin the toner hopper and waste |
| shutter arm towards you. | | | | hopper together. Place the cartridge gear housing |
| Step #2:oUsing a small flat blade screwdriver, | | | | end cap onto the side of the cartridge. Install the |
| release the clip that holds the drum shutter arm | | | | four screws that hold the end cap in place. |
| to the cartridge. | | | | Step #47:oPlace the contact end cap onto the |
| Step #3:oPull the shutter arm from the drum | | | | end of the cartridge. Install the two screws that |
| shutter and slide the shutter arm from its | | | | hold the end cap in place. |
| positioning post. | | | | Step #48:oYou will now need to lock the contact |
| Note: Do not lose the tension spring that fits inside | | | | end cap in place. To do this, drill a 1/16 hole |
| the drum shutter arm. Place the tension spring | | | | through the contact end cap and through the |
| back into the shutter arm. | | | | toner sensor bar positioning post. The hole needs |
| Step #4:oOpen the drum shutter exposing the | | | | to be drilled approximately 1/8 from the end of |
| drum. The drum shutter is keyed on the | | | | the toner hopper and 1/8 from the end of the |
| non-contact side of the cartridge. Slide the shutter | | | | sloped section on the contact end cap. |
| bar back until the bar can be removed from the | | | | Step #49:oNow, install a 1/16 spring pin into the |
| cartridge end cap. | | | | hole drilled in the bottom of the contact end cap. |
| Step #5:oPull the drum shutter bar from the | | | | Step #50:oInstall the keyed end of the drum |
| cartridge contact end cap. Then you want to set | | | | shutter bar into the gear housing end cap. |
| the drum shutter aside. | | | | Step #51:oInstall the non-keyed end of the drum |
| Step #6:oNext, remove the two screws holding | | | | shutter bar into the contact end cap. |
| the cartridge cap to the cartridge. | | | | Step #52:oSlide the drum shutter arm onto the |
| Step #7:oUsing a flat blade screwdriver, pry the | | | | positioning post. Push the drum shutter arm into |
| contact end cap away from the toner hopper | | | | the drum shutter. Gently, slide and open the |
| breaking the three plastic welds holding the end | | | | shutter to engage the tension spring. |
| cap to the toner hopper. Afterwards, remove the | | | | Step #53a:oWe are almost done. Place one probe |
| end caps. | | | | of an Ohmmeter on the toner sensor contact and |
| Step #8:oUsing diagonal cutters cut the three | | | | place the other probe into the hole that was drilled |
| plastic welds flush with the contact end cap. | | | | next to the contact. Locate the sensor bar that |
| Step #9:oSimply rotate the cartridge 180 degrees. | | | | comes out from the toner hopper through the |
| Carefully remove the four screws holding the | | | | hole drilled in the end cap, making sure you have |
| gear housing end cap. | | | | a low resistance connection. |
| Step #10:oWhile holding the opposite end of the | | | | Note: If the contact is not made between the |
| cartridge, remove the gear assembly end cap | | | | sensor bar and thecontact on the end plate, this |
| from the cartridge. Then you want to separate | | | | will result in an error "54.1 Remove Sealing Tape" |
| the two sections and set the toner hopper aside. | | | | or if contact is lost during usage, a premature |
| Step #11:oRemove the screw holding the drum | | | | toner low can occur. |
| axle. Then remove the drum axle. | | | | Step #53b:oTest the cartridge. |
| Step #12:oLift the drum by the small gear and pull | | | | Congratulations, you have successfully completed |
| the drum from the bearing hub. | | | | the process on how to remanufacture your own |
| Step #13:oRemove the PCR from the PCR | | | | HP 4200/4300 series LaserJet toner cartridges. |
| saddles. | | | | Good luck and complete each cartridge as if it |
| Note: If you are going to reuse the PCR clean the | | | | were your last. This information is provided to |
| roller using a lint free cloth and water. | | | | you for both educational use and to improve your |
| Step #14:oIn order to remove the wiper blades; | | | | knowledge in the technical area within the |
| pull the OEM sealing foam material away from the | | | | remanufacturing industry. |
| wiper blade. | | | | |