HP® ENTERPRISE 700 COLOR MFP M775 SERIES
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1. 11 Clean out all the waste toner from the chamber Try not to get any toner on the wiper blade seal if possible ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 12 Clean the felt seals on each end of the wiper blade If the wiper blade glue has toner on it clean it off with alcohol and a foam swab If it does not become sticky again it needs to be removed and a good silicone caulk used to seal the blade off GE 100 Silicone and Phenoseal are two good brands for this gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 13 Install the new wiper blade2. additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Residual toner feed screw ITB SWE6 Toner collection unit switch ITB residual toner full sensor Eii aaa ITB cleaner Toner collection unit ITB motor ITB CLEANING The image transfer belt ITB is cleaned by the ITB cleaning blade The ITB wiper blade scrapes off the residual toner and an auger moves the toner to the toner collection box gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Cleaning Blade i drum Toner Waste OPC DRUM CLEANING The drum is cleaned after the image is transferred to the paper by the wiper blade This part is fairly standard the wiper blade scrapes the toner off the drum and the recovery blade guides it into the waste chamber U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product b
3. and two screws If you removed the wiper blade glue seal the back edge of the blade with the silicone now 14 The amber film assembly is held in place with 15 Clean the primary charge roller PCR with your preferred double sided tape If this is not sticking or a new wiper blade cleaner and install in the cartridge with the PCR holders is being used replace the tape Replace the film assembly Make sure you lock the locking arms in place gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 16 Place conductive grease on the black holder side of the shaft REPLACING THE DRUM If you are replacing the drum the gears will need to be changed over from the OEM to the new There are two methods of removing the gears from OPC drums The first and easiest method is to place the drum in a metal vice approximately 2 back from the gear and slowly tighten the vice The gear should pop out easily This is the only method you can use on the OPC drums which have a weighted slug in the center If you use
4. figure shows the basic layout of the cartridges and how they relate to one another and the printer The laser units are on the bottom the cartridges are at an angle and the ITB is on top OO Product cross section OA 7 a a OOO Item Description Item Description 1 ITB 12 MP tray pickup roller 2 Primary transfer roller 13 MP tray separation pad 3 Delivery roller 14 Cassette pickup roller 4 Duplex reverse roller duplex models only 15 Cassette separation roller 5 Duplex flapper duplex models only 16 Feed roller 6 Pressure roller 17 Media sensor 7 Duplex feed roller duplex models only 18 Registration roller 8 Fuser 19 Registration density sensor 9 Fuser sleeve 20 Cassette 10 Secondary transfer roller 21 Photosensitive drum 11 ITB drive roller 22 Laser scanner assembly U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS lt Media path lt a Direction of drum rotation i Block Fuser Transfer amp 9 ITB cleaning CE E E
5. the Home screen scroll down to the Administration button 2 Open the Reports menu 3 Pick the page you would like to print and touch the Print button Print Quality Test Page 1 From the Home button open the following menus Administration Troubleshooting Print Quality Pages 2 Press the down arrow until PQ Troubleshooting Page appears on the display 3 Press the Print button REPETITIVE DEFECT CHART Primary charge roller 35 0 mm Developer roller sleeve 42 0 mm OPC drum 94 0 mm Normally we pull this info from the HP service manual but as of the date of this writing the manual is not available yet The numbers below are a guess and should be taken just as a guide to get you close to what an issue might be When the service manual becomes available we will update these numbers Primary transfer roller 50 0 mm Secondary transfer roller 60 0 mm Fuser sleeve 76 0 mm Fuser pressure roller 79 0 mm U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com
6. to the label or gear side of 49 Install the spring the cartridge 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only E UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWW UNnRINeG timag l ng com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS a r i amt siy g iy g n pa Wt T Ba i cezoge A Y _ a 50 Remove and replace the chip 51 If the new replacement chip is loose in the slot Close off the top edges with small amounts of hot glue 52 Install the drum cover onto the cartridge gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS TAKING TEST PRINTS Print Quality Troubleshooting Pages Quite a few test pages can be accessed through the menu 1 From
7. HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS HP CE340A BLACK TONER CARTRIDGE 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS REMANUFACTURING THE HP ENTERPRISE 700 COLOR MFP M775 SERIES BLACK AND COLOR TONER CARTRIDGES By Mike Josiah and the Technical Staff at UniNet First released in January 2013 the M775 series of color laser printers are based on a 30 ppm black and color Wide format A3 600 x 600 Dpi engine 3600 DPI with RET These are massive machines that can print copy scan and fax The engine has a maximum duty cycle of 120 000 pages per month comes standard with 1 5Gb RAM and has an option to have paper trays that can hold up to 4 350 pages In addition the also have ePrint and AirPrint mobile printing built in The M775 cartridges are an all in one type cartridge that consists of the toner supply drum and waste chamber They are similar to but different from the HP CP5225 cartridges Like a most of the other high volume HP Color laser printers the cartridges in this series do not fit into a pull out tray All four cartridges are stacked in line front to back and fit directly into the printer Note also that the drum faces up not down when placed in the printer Because
8. Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWW UNnRINe timag l ng com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 3 Remove the pins with flush cutting wire cutters The smaller pin fits on the contact side of the cartridge the long pin on the label or gear side 4 On the gear side press in on the plastic locking mechanism 5 On the opposite side lift up on the black lever Lift the two halves apart 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www UuhniIne timag l ng com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 6 On the waste chamber remove the two screws from the drum gear end cap Press in on the tab as shown and remove the end cap There is no need to remove the opposite side end cap T Remove t
9. OLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Developing blade Developing roller Developing bias Photosensitive drum The third or developing stage is where the toner is developed on the drum by the developing section or supply chamber which contains the toner particles The development stage is actually made up of two steps toner charging and the actual develop ment In the toner charging stage the toner stirring blade turns inside the hopper As it turns friction causes a negative potential to develop on the toner In addition a foam feed roller brings the toner to the developer roller and also places a negative charge on the toner These two charges help ensure a uniform charge on the toner Once the toner is properly charged the toner will coat the developer roller The toner is also held onto and attracted to the developer roller by another negative DC bias voltage This voltage is controlled by the printer s intensity setting and causes either more or less toner to be attracted by the developer roller This in turn will either increase or decrease the print density The amount of toner on the developer roller is controlled by the doc tor blade which uses pressure to keep the amount of toner on the roller constant As the laser exposed areas of the OPC drum approach the developer roller the toner particles are attracted to the drum s surface due to the opposite voltage potentials of the toner and l
10. ONS PRINTERS BASED ON THE M775 ENGINE HP LaserJet Enterprise 700 color MFP M775dn HP LaserJet Enterprise 700 color MFP M775f HP LaserJet Enterprise 700 color MFP M775z HP LaserJet Enterprise 700 color MFP M775z CARTRIDGES USED IN THESE MACHINES CE340A black 13 500 pages 171 99 List CE341A cyan 16 000 pages 432 99 List CE343A magenta 16 000 pages 432 99 List CE342A yellow 16 000 pages 432 99 List CE7980A toner collection unit 24 99 List Pricing in U S American Dollars current as of March 2013 All the toner cartridges are considered part of the 651A series For this series of machines full load cartridges come with the machines when new No starter cartridges are used These cartridges use chips that need to be replaced each cycle U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS HP M775 COLOR PRINTING THEORY The color toner cartridge printing process happens in a series of stages or steps For the purpose of this article we will call them stages The following
11. RPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS secondary transfer opposed roller a secondary transfer opposed roller Secondary transfer roller static charge eliminator Secondary transfer roller Secondary transfer bias s SE The paper separates from the ITB belt as the belt turns back down to start the process again The static charge on the back of the paper is decreased with static charge eliminator This helps stabilize the paper feed and also prevents toner flares spots under low temperature and low humidity conditions Fuser sleeve Fuser heater Paper Pressure roller In the fifth stage the image is then fused onto the paper by the fuser assembly The fuser assembly is comprised of the upper heating assembly and lower pressure roller The lower pressure roller presses the page up into the upper heating assembly which then melts the toner into the paper This heating assembly consists of a flexible sleeve with a ceramic heating coil inside This type of fuser affords instant on fusing with little to no wait time and low power consumption cee U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For
12. UCTIONS Step 2 Removal of the contact gear A Insert the 1 wooden dowel into the gearless end of the drum B Tap the dowel with a hammer until the gear comes loose Step 3 Remove any old adhesive from the gears straighten out any damage done to the contact gears metal contacts A Removing the adhesive can be done with a small sharp common screwdriver The glue comes off easily Step 4 Install the gears on the new drum A Inspect the metal contacts on the contact gear Make sure that the contacts will make proper contact with the inside of the OPC drum B Locate the side of the drum on which you are going to place the contact gear On some OPC drums this is critical see individual instructions for more information C Lightly sand the INSIDE of the OPC where the metal parts of the contact gear will meet This will insure a good electrical contact D Dry fit the contact gear in the OPC drum and check for a good contact with an Ohmmeter The reading should be a direct short or no more than 1 or 2 Ohms NOTE When checking the contact place one lead on the drum axle contact and the other on the edge of the drum This way you will not have to pierce the coating that is on the OPC surface Radio Shack carries cheap Ohmmeters for less than 10 and the sales people will normally be glad to show you how to use it E Using the super glue place a few 3 4 small drops of glue strategically around the inside edge of the OPC d
13. adjust the printer accordingly Running test prints and cartridge troubleshooting will be covered at the end of this article REQUIRED TOOLS 1 Toner approved vacuum 2 A small screwdriver common style 3 A Phillips head screwdriver 4 Needle nose pliers REQUIRED SUPPLIES Toner for use in the HP M775 cartridges New replacement chip New long life drum New wiper blade New toner feed roller optional New primary charge roller optional New doctor blade optional Drum cover Lint free cloths Conductive grease U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Mia PSX The pins in these cartridges are stepped In other words the outside is thicker than the inside To remove the pins you must carefully shave the plastic away from the pins The procedure is described as follows 1 Remove the spring from the label side of the cartridge 2 With a razor knife carefully shave the plastic from the heads of the hinge pins on both sides of the cartridge 2013 UniNet Imaging
14. aser exposed areas of the OPC drum Primary transfer bias Primary transfer roller Photosensitive drum The fourth stage is the transfer stage This is where there are some large differences from monochrome printers and also from other color lasers In the primary transfer stage the transfer roller which is located directly opposite each OPC drum places a positive DC bias charge on the back of the ITB image transfer belt Each toner cartridge has a separate transfer charge roller The image is transferred from the drum directly to the ITB This process is repeated for each color cartridge in the following order Yellow Magenta Cyan and Black At the same time the paper is moving between the secondary transfer roller and the ITB As the ITB passes the secondary transfer roller the positive charge is picked up and draws the negatively charged toner off the belt and onto the paper Note that this entire process is upside down from most previous HP engines The ITB and transfer rollers are on top of the OPC drum not underneath it 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com 6WWW UN i netimaging com HP ENTE
15. e remaining toner and fill with the correct color of toner for use in the HP M775 cartridge gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWW UI i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 35 When a seal is available you will first need to remove the auger drive gear and then remove the auger so that you have access to the seal area Install the seal onto the seal rails Pull the release tape off 1 at a time and press the seal in place as you go Install the auger and auger drive gear Make sure the drive gear is positioned as shown 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only a UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWW UNnINe timag l ng com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 36 Remove the
16. eir respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 44 Install the gears in the order shown If you installed a seal 45 Install the outer gear end cap and screws slide the seal end through the take up gear and wrap the loose tail tight on the roller 46 Place the triple gear on the developer roller shaft and fit into the spring assembly on the end cap Install the end cap and install the two screws ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 47 Place the two halves together contact side first On the gear side press the lever in place On the contact side snap the lock up into the end cap 48 Install the two pins large pin
17. formation Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWW UNnINe timag l ng com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Install the doctor blade and two screws Make sure the sticky seals on either rend of the blade seal correctly If the material is no longer sticky clean it with alcohol or replace it with a small amount of silicon 41 Clean the contacts and replace the conductive grease on the inner contact end cap Install the inner contact end cap and screw ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 42 Install the cleaned developer roller Do NOT use any chemicals to clean this A lint free cloth works fine Place the keyed end to the gear side and conductive grease on the contact side 43 Install the inner gear end cap and two screws ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of th
18. he drum 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only E UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWW UNnRINeG timag l ng com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 8 Remove the primary charge roller by lifting up on the black and white locking arms The arms will stay in place 9 To remove the wiper blade the amber film assembly needs to be removed Slide a razor knife under the plastic mounting bar and remove the assembly ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Film assembly removed 10 Remove the two screws from the wiper blade Slide the razor knife along the back edge of the blade to release it from the glue Remove the wiper blade
19. iNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www unine timag l ng com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 21 Pry up on the small tab and remove the end cap 22 Remove the seal take up gear 23 Remove all the gears as shown except for the mixing blade gear and the sealing strip gear The mixing blade gear is attached to the mixing blade inside the hopper and is very difficult to re attach properly gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 24 On the contact side remove the screw pry up on the small tab and remove the end cap Watch out for the developer gear assembly This is a three piece gear set that may come
20. nd leaving a latent electrostatic image on the drum The areas where the lasers did not strike the drum will retain the higher negative charge cee U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Photosensitive drum Scanner motor unit Laser unit C Bk w C D u O or Laser unit Y M r O O D Connecting board Scanner mirror O A K A O m a zZ or D O T D Ol amp Z O x Z Lu W o o 2 21 a a gt 2 J C Oo o D These machines have gone back to using just one laser scanner unit for all four colors gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 C
21. of this machine layout we will take a moment and run through the printer theory before we get started These cartridges are basically rectangular shaped that comes with a toner seal and a snap on drum cover across the bottom to protect the drum see above image This cover also separates the developer roller from the drum so that when the cartridge is stored the developer roller does not become flattened These printers also have a separate waste bottle to collect the waste toner from the image transfer belt or ITB In reading through the user manual almost all parts that are field replaceable must be replaced by the user if they fail while under warranty This includes the usual items like the fuser feed rollers etc but in this series also includes items like the formatter control panel and fax card The last items come in replacement kits That s a bit unusual but these parts are now more easily replaceable and it seems HP is trying to cut their costs gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTI
22. rand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Developing unit is disengaged Developing unit is engaged Photosensitive drum Developing unit PS11 Developing disengagement sensor I I I Developing disengagement cam I I i me Developing disengagement motor These printers can print in full color or in black only modes To print in the black only mode the printer disengages the developer rollers in the cyan magenta and yellow cartridges This process also takes place with the primary transfer rollers and the ITB belt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS I Primary transfer 5 oe disengagement solenoid L SLS_ lt All colors a
23. re disengaged gt Primary transfer SWS disengagement switch n V ITB i Primary transfer disengagement cam YMC slide plate Bk slide plate Q lt All colors are engaged gt Primary transfer roller i 3 t Ea Photosensitive drum This process also takes place with the primary transfer rollers and the ITB belt gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Regisration density sensor Registration density belt perimeter sensor Pattern of toner PRINTER CALIBRATION At the start of all this is the cartridge detection process toner level detection and then the calibration cycle The printer will self calibrate whenever it is turned on within 15 minutes when a new toner cartridge is installed and after 48 hours of run time Calibration consists of a solid block and halftone of each color being printed to the image transfer belt As the printed areas get to the top of the belt a sensor will detect them measure the density and
24. rum Make sure you leave a blank area for the metal contacts F Insert the contact Gear G Check for continuity again with the Ohmmeter H Repeat steps E and F for the drive gear NOTE Be very careful not to place the metal contacts in direct contact with the glue as this will interfere with the proper grounding of the drum and the cartridge will not print properly Solid black pages It is also very important to NOT put any glue on the gear as the chances of it dripping out onto the drum surface and ruining it are high Placing the glue inside the drum tube works much better U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 17 Install the drum short hub side onto the long drum ground axle pin Make sure there is conductive grease on the drum ground axle pin 18 Install the end cap and two screws 20 On the supply chamber remove the two screws from the gear side end cap Place a small amount of white lithium grease on the drum hub 19 Place the waste chamber aside 2013 Un
25. seal port and slide the seal pull tab through the slot Install the seal port 37 Install the feed roller and rubber bushing keyed end to the gear side U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWW UI i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 38 Install the feed roller felt washers Place the gray seal to the gear side white to the contact side 39 Press the developer roller felt seal back in place 40 Gap the blade to 1 6mm Make sure it fits under the retaining blade You may have to modify your gapping gauge to fit If the glue is not sticking place a very small bead of 100 adhesive silicon to lock it in place DO NOT get the silicon on the top of the felt This felt has a tendency to curve when re installed The picture shown is NOT the correct way Make sure the felt is straight or it will leak 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only a UniNet Imaging does not warrant downloaded in
26. the right side of the chamber lift up the developer roller felt seal Lift it from the front side and lay it over the back gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 31 Remove the felt washers from both sides of the feed roller There is a gray felt washer on the gear side and a white felt washer on the contact side 32 Pry out the rubber feed roller bushing from the right side ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Product of Japan erent fp coe cp i olo set pet j fj WEI F 33 Remove the feed roller 34 Clean out th
27. this method go on to step 3 The other method is as follows REQUIRED TOOLS AND MATERIALS 1 1 4 x 15 metal rod 2 1 x 15 wooden dowel 3 Tube of super glue 4 Small piece of Emory cloth or sand paper Step 1 Removal of the drive gear The drive gear is the gear that has no metal electrical contacts in it These gears are usually larger than the contact gear A Carefully insert the 1 4 metal rod into the center of the gear that has the contacts or the contact gear B Angle the rod so that the rod presses against the edge of the opposite gear The rod should be touching both the inside of the OPC drum and the edge of the gear C Tap the end of the rod with a hammer working the rod around the entire edge of the gear until the gear comes loose NOTE Gently heating the ends of the drum with a hair dryer or heat gun on low may cause the glue to soften and ease in the removal process Just be careful not to use too much heat and melt the gear gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTR
28. u E F ee ee E E E E E ee ee ee de ee ee ee EEFE ee ee ee ee me E CE E E ee ee ee me l Ue me me Ue Ue Ue Ue Ue ee Ue Ue Ue l ee Developing i 3 Laser beam exposure i Latent image formation Figure shows the complete image formation process Photosensitive drum In the first stage light from the pre exposure LED strikes the drum to remove any residual charges from the drums surface ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com WWww un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS Primary charging roller Primary charging bias fof TFF Then the primary charge roller PCR places a uniform negative DC voltage on the OPC drum surface The amount of negative DC voltage placed on the drum is controlled by the printer s intensity setting Laser beam In the second stage a laser beam is fired onto a rotating mirror called the scanner As the mirror rotates the beams are reflected into a set of focusing lenses The beams then strike the drums surface reducing the negative charge a
29. with the end cap 25 Remove the triple developer roller drive gear s 26 On the gear side inner end cap remove the two screws and end cap gt U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS 27 Remove the developer roller 28 Remove single screw and contact side inner end cap a 29 Remove the two screws from the doctor blade and start to lift the blade up ce U i N t 2013 UniNet Imaging Inc All trademark names and artwork are property of their respective owners Product brand names mentioned are intended to show compatibility only UniNet Imaging does not warrant downloaded information Unauthorized sale reproduction or distribution of this article is prohibited For additional support please contact techsupport uninetimaging com www un i netimaging com HP ENTERPRISE 700 COLOR MFP M775 SERIES TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS There is glue on either end of the blade As you lift the blade up slice the glue away from the blade with the razor knife 30 On
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