HP Color LaserJet 3500HP Color LaserJet 3500NHP Color LaserJet 3550HP Color LaserJet 3550NHP Color LaserJet 3700HP Color LaserJet 3700NHP Color LaserJet 3700DNHP Color LaserJet 3700DNT

Part Number: Q2670A –Black (HP CLJ3500/3550/3700)Part Number: Q2681A –Cyan (HP CLJ3700)Part Number: Q2682A –Yellow (HP CLJ3700)Part Number: Q2683A –Magenta (HP CLJ3700)Part Number: Q2671A –Cyan (HP CLJ3500/3550)Part Number: Q2672A –Yellow (HP CLJ3500/3550)Part Number: Q2673A –Magenta (HP CLJ3500/3550)

Tools required:Phillips ScrewdriverSmall Flat Blade ScrewdriverX-acto knifeMag FunnelDiagonal cuttersSpring HookDRPINTOOL

Supplies required:Padding PowderSoft Lint-Free ClothCotton SwabsConductive GreaseAnhydrous Isopropyl AlcoholVacuum or Compressed AirSealing Foam

Technical Instructions Printers OEM Info Tools 1

E-mail: info@futuregraphicsllc.com Website: www.futuregraphicsllc.com

Step 1Hold the cartridge so the drive gear element isfacing you. Release the tension spring attachedto the drum shutter using a spring hook. (See Photo 1)

Photo 1

Step 2Rotate the cartridge so the contact end of the cartridge is facing you. Release cartridgetension spring attached to the waste and tonerhoppers using a spring hook.(See Photo 2)

Photo 2

Photo 3

HP3500/3700TECH

REV. 8/01/06

Step 3Use an X-acto knife to remove the plastic cover-ing the cartridge pin.(See Photo 3)

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Step 7Position the waste hopper with drum facing upand towards you.(See Photo 7)

Photo 4 Step 8Locate the spring pin that locks the drum’sdrive hub in place. Rotate drum until thesquare opening on the drive hub faces up.(See Photo 8)

Photo 6

Photo 7

Step 9Use the DRPINTOOL to push the spring pinthrough the round opening of the drum huband shaft. Use the alignment pin to ensure thefeed through hole of the tool is correctlyaligned. Turn the tool handle clock wise andalign the point of the tool shaft into the springpin hole. Turn the handle with consistent effortuntil the pin exits from the feed through hole. (See Photo 9)

Step 10Remove the drum axle and drum. Set aside.(See Photo 10). Cover drum to protect fromlight exposure.

Photo 8

Step 11Release the white PCR retaining arms fromeach end of the PCR. (See Photo 11). Carefullyremove the PCR. Clean PCR using a dry, softlint-free cloth. NOTE: If needed, water can beused to clean the PCR.

Photo 9

2 HP3500/3700 Technical Instructions

Photo 5

Photo 10

Step 4Using diagonal cutters, remove thecartridge pin.(See Photo 4)

Step 5Rotate the cartridge again so thedrive element is facing you. Repeatsteps 4 and 5 to remove the car-tridge pin. (See Photo 5)NOTE: If needed, use the X-actoknife to cut slots for improvedaccess to the pin using the diagonalcutters.

Step 6Separate toner hopper from thewaste hopper. (See Photo 6) Settoner hopper aside.

Photo 11

Photo 12Step 12Clean PCR saddles with a cotton swab andAnhydrous Isopropyl Alcohol. (See Photo 12)

Photo 14

Photo 15

Photo 16

HP3500/3700 Technical Instructions 3

Step 15Clean waste hopper with a vacuum or drycompressed air. Remove any remaining tonerusing a dry soft lint-free cloth.

Step 16Apply padding power to the new wiper bladeusing a soft lint-free cloth. Place the new wiperblade onto the waste hopper. Install the twoscrews that hold the waste hopper in place.(See Photo 15)

Step 13Remove the two Phillips screws holding thewiper blade using #1 Phillips screwdriver. Liftone end of the wiper blade with theneedlenose pliers and pull the blade away fromthe waste hopper.(See Photo 13)

Photo 13

Step 14Remove the OEM wiper blade sealing foamfrom the waste hopper.(See Photo 14)

Photo 17 Photo 21

Photo 19

Step 19Clean drum axle bearings and drumcontact with cotton swab andAnhydrous Isopropyl Alcohol.(See Photos 19 & 20)

Step 20Apply conductive grease to theright side axle bearing using thecotton swab stick end. (See Photo21) Apply padding powder to theOPC drum using a lint-free softcloth.

Step 17Apply sealing foam along the edge of the wiperblade and waste cartridge.(See Photo 16)

Step 18Apply conductive grease to the black PCR sad-dle. Place the white PCR retaining arms oneach side of the PCR and install the PCR.(See Photos 17 & 18)

Photo 18

Photo 20

Photo 22

Photo 23

Photo 24

4 HP3500/3700 Technical Instructions

E-mail: info@futuregraphicsllc.com Website: www.futuregraphicsllc.com

Step 21Place OPC drum onto the wastehopper so the drive hub sits next tothe contact. Install drum axlethrough the OPC drum.(See Photo 22)

Step 22Align the square opening on thedrum drive hub with the hole in thedrum axle. Install the drum springpin. Use the alignment pin to ensurethe feed through hole of the tool iscorrectly aligned with the drum drivehub hole. Turn the tool handle clock-wise with consistent effort untilapproximately 1/8” of pin isexposed through both sides of thedrum drive hub. (See Photo 23)

Step 23Apply conductive grease to the drum axle con-tact. (See Photo 24) Rotate the drum 5 to 10revolutions to ensure drum is not binding onthe wiper blade. Clean the padding powder offthe PCR using a dry soft lint-free cloth whilerotating drum.

Step 24Reconnect the spring attached to the drumshutter. Set the waste hopper aside and coverunit to protect OPC drum from light.

Step 25Remove the Phillips screw holding the contactend cap to the toner hopper using the #1Phillips screwdriver. (See Photo 25)

Step 26Remove the two Phillips screws holding thedeveloper roller end cap using the #1 Phillipsscrewdriver. (See Photo 26) Remove the endcap.

Step 27Carefully rotate the toner hopper so the gearassembly is facing you. Remove the twoscrews that hold the gear housing end cap tothe toner hopper. (See Photo 27) Remove theend cap.

Step 28Remove the large black drive gear and thewhite developer roller gear. (See Photo 28)

Photo 25

Photo 28

Photo 26

Photo 27

Step 33Install the drive gear end on the developerroller axle into a drill motor and tighten in thechuck. Clean the developer roller using a lint-free cloth and 99% alcohol while the roller isrotating in the drill. (See Photo 33) Once theroller is clean, go over the roller again usingdistilled water and a soft lint-free cloth. Makeseveral passes. Dry the roller using a dry, softlint-free cloth.NOTE: The surface of the developer roller maychange and become wrinkled. If properlycleaned, the developer roller will go back to itsoriginal state when finished with the cleaningprocess.

Photo 29

HP3500/3700 Technical Instructions 5

Step 31Using a Phillips screwdriver remove the twoscrews that hold the developer roller end capto the toner hopper. (See Photo 31) Removethe end cap.

Step 29Release the clip that holds the gear retainingplate using a small flat bladed screwdriver.(See Photo 29)

Step 32Lift the developer roller from the toner car-tridge. Remove the white bushings from theends of the developer roller. (See Photo 32)

Step 30Remove the three white gears from the end ofthe hopper.(See Photo 30)

Photo 30

Photo 31

Photo 32

Photo 33

Step 34Remove the two Phillips screwsholding the doctor blade to thetoner hopper. Clean the doctorblade using dry compressed air.(See Photo 34)

Step 35Clean gears using dry compressedair and dry, soft lint-free cloth.

Step 36The next steps will fill the toner car-tridge with the supply roller in placeusing the Mag Funnel. Place tonercartridge into holding device or fix-ture. Place the Mag Funnel in theopening for the developer roller.Holding the Mag Funnel in onehand, pour the toner with the otherhand. (See Photo 35)NOTE: Look inside of toner car-tridge to ensure the agitator bladeis not blocking opening. Move theagitator drive gear to move theblade into the correct position.

Photo 34

Photo 35

Photo 38

Photo 39

HP3500/3700 Technical Instructions 6

Step 39Place the cleaned doctor blade into the tonercartridge and install two Phillips screws to holdthe blade in place. (See Photo 38)

Step 38Place the doctor blade onto a flat surface or acleaning fixture. Clean the doctor blade using alint free cloth and 99% alcohol. (See Photo 37)NOTE: Do not use pressure to clean the surfaceof the doctor blade. Wipe the surface of theblade until all the toner build up is removed fromthe blade. Do not bend the doctor blade. Visuallyinspect the doctor blade before reinstalling theblade onto the cartridge.

Photo 37

Photo 40

Step 40Install the white developer roller bushings ontothe shaft of the developer roller. Place thedeveloper roller onto the toner hopper so thelong end of the shaft is on the gear side of thehopper. (See Photo 39)

Photo 43

Photo 42

Step 43Install the three white gears ontothe end cap.(See Photo 42)

Photo 44

Photo 36Step 37Pour slowly to allow toner to settle into tonercartridge. Tap funnel and cartridge as neededto move toner into cartridge. (See Photo 36)Clean the excess toner from the developerroller and doctor bar area.

Step 41Install the developer roller end cap onto thecontact side of the cartridge and install the twoscrews that hold the end cap in place.(See Photo 40)

Photo 41Step 42Install the developer roller end cap on the gearside of the hopper. Install the two screws thathold the end cap in place.(See Photo 41)

Step 44Install the metal gear retaining plateonto the end cap.(See Photo 43)

Step 45Install the white developer rollergear and the large black drive gearonto the end cap.(See Photo 44)

Photo 48

Photo 49

Photo 50

7 HP3500/3700 Technical Instructions

E-mail: info@futuregraphicsllc.com Website: www.futuregraphicsllc.com

Step 48Place the contact end cap onto the toner hop-per and install the screw that holds the endcap in place. (See Photo 48)

Photo 45

Photo 46

Step 46Place the gear housing end caponto the hopper. Install the twoscrews that hold the end cap inplace. (See Photo 45)

Step 47Clean the contacts on contact sideend cap using cotton swab andAnhydrous Isopropyl Alcohol. (See Photo 46)Apply contact grease to the devel-oper roller and supply roller con-tacts using the cotton swab stickend. (See Photo 47)

Photo 47

Step 49Place waste hopper on the work bench so thedrum is facing up. Align the toner hopper andwaste hopper and join the two sections togeth-er. Check the tension spring on the back of thehopper to make sure it sits flat against thetoner hopper. (See Photo 49)

Step 50Install the cartridge pins in each of the cartridge. (See Photo 50)NOTE: The large pin goes on the gear end ofthe cartridge. (See Photo 51)

Step 51Attach the drum shutter tension spring to theshutter bar. (See Photo 52)

Step 52Attach the tension spring to the post contactside of the toner hopper and the post next tothe drum shutter using a spring hook.(See Photo 53)

Step 52Replace the cartridge chip.(See Photo 54)

Photo 52

Photo 53

Photo 51

Photo 54

HP3500/3700 Technical Instructions 8

In January of 2004, HP released two color laser printers intothe North American market. The HP Color LaserJet 3500 and3700 are based on a new Canon engine similar to that of the HP4600. The single pass engine design enables the new printersto deliver 12ppm and 16ppm while printing either monochromeor color.

While both machines use the same black cartridge, the colorcartridges are different. The black cartridge, Q2670A, yields6,000 pages at 5 % coverage. The color cartridges for theHP3500, Q2671A (cyan), Q2672A (yellow), Q2673A (magenta),yield 4,000 pages at 5 % coverage. The HP3700 color car-tridges, Q2681A (cyan), Q2682A (yellow), Q2683A (magenta),yield 6,000 pages at 5 % coverage. All the internal componentsare the same for all the cartridges the only difference is the chipand the cartridge fill weights.

HP 3500/3700