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HP4250_4350TECH

Technical Instructions
CORPORATE LOS ANGELES, USA
US 1 800 394.9900 Int'l +1 818 837.8100 FAX 1 800 394.9910 Int'l +1 818 838.7047

Machine Compatibility
HP4240n HP4250 HP4250n HP4250tn HP4250dtn HP4250dtnsl HP4350n HP4350tn HP4350dtn HP5340dtnsl
HP4220n Cartridge Part Number: Q5942A Yield @ 5% Coverage: 10,000 Pages/ min: 40 Resolution: 1200dpi HP4250 Cartridge Part Number: Q5942A Yield @ 5% Coverage: 10,000 Cartridge Part Number: Q5942X Yield @ 5% Coverage: 20,000 Pages/ Min 45 Resolution: 1200dpi

OEM Info
HP4350 Cartridge Part Number: Q5942A Yield @ 5% Coverage: 10,000 Cartridge Part Number: Q5942X Yield @ 5% Coverage: 20,000 Pages/ Min 55 Resolution: 1200dpi

Tools

1

Phillips Screwdriver, Diagonal Cutters, Dremel Tool with cutting bit, Small flat blade Screwdriver, Needle-nose Pliers, HP4200PINGUIDE2, 3/32 inch drill bit Supplies Required: Padding Powder, Soft Lint Free Cloth, Swabs, Toner, Drum, Doctor Blade, Wiper Blade, Expanding Foam, HP4200PIN, High Temperature Grease (Dow Corning 44® recommended)

ATLANTA, USA
US 1 877 676.4223 Int'l +1 678 919.1189 FAX 1 877 337.7976 Int'l +1 770 516.7794

KANSAS CITY, USA
US 1 913 871.1700 FAX 1 913 888.0626

Photo 1

NEW YORK, USA
US 1 800 431.7884 Int'l +1 631 588.7300 FAX 1 800 431.8812 Int'l +1 631 588.7333

Step 1
Place the cartridge on the workbench with the drum up and the drum shutter arm towards you. (See Photo 1)

MIAMI, USA
US 1 800 595.4297 Int'l +1 305 594.3396 FAX 1 800 522.8640 Int'l +1 305 594.3309

Step 2
Using a small flat blade screwdriver release the clip that holds the drum shutter arm to the cartridge. (See Photo 2)
Photo 2

TORONTO, CAN
CAN 1 877 848.0818 Int'l +1 905 712.9501 FAX 1 877 772.6773 Int'l +1 905 712.9502

MELBOURNE, AUS
AUS 1 800 003. 100 Int'l +62 03 9561.8102 FAX 1 800 004.302 Int'l +62 03 9561-7751

Step 3
Pull the shutter arm from the drum shutter and slide the shutter arm from its positioning post. (See Photo 3 and Photo 4) NOTE: Do not lose the tension spring that fits inside the drum shutter arm. Place the tension spring back into the shutter arm as shown in photo 5.
Photo 3 Photo 4 Photo 5

SYDNEY, AUS
AUS 1 800 003.100 Int'l +62 02 9648.2630 FAX 1800 004.302 Int'l +62 02 9548.2635

BUENOS AIRES, ARG
ARG 0810 444.2656 Int'l +011 4583.5900 FAX +011 4584.3100

SÃO PAULO, BRAZIL
Int'l +55 11 5524.8000

BOGOTÁ, COLOMBIA
Int'l +57 1410.8842

CALI, COLOMBIA
Int'l +57 2661.1166

MONTERREY, MEXICO
Int' +52 55 5333.9800

JOHANNESBURG, S.A.
S.A. +27 11 974.6155 FAX +27 11 974.3593

ZHUHAI, PR CHINA
Int'l +86 756 3359608 FAX +86 756 3359681

© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

E-mail: [email protected]
REV. 5/10/05

Website: www.futuregraphicsllc.com

2
Photo 8

HP4250/4350 Technical Instructions
Step 6
Place the Side Plate Drill Guide onto the bottom of the toner hopper. The Side Plate Drill Guide has three alignment pins. (See Photo 8) The large alignment pin fits into the square notch on the bottom of the contact end cap, the smaller alignment pin located next to the large pin fits just over the first supporting rib next to the end cap. The last alignment pin will fit over the fourth supporting rib. (See Photo 9)

Step 4
Open the drum shutter, exposing the drum. The drum shutter bar is keyed on the non-contact side of the cartridge. Slide the shutter bar back until the bar can be removed from the cartridge end cap. (See Photo 6)
Photo 9

Photo 6

Photo 10

Step 7
Using the provided .136 (#29) drill bit, drill a hole through the contact end cap. (See Photo 10)

Step 5
Pull the drum shutter bar from the cartridge contact end cap. (See Photo 7) Set the drum shutter aside.

Step 8
Remove the Drill Guide.

Photo 7

Photo 11

Step 9
Place a flat blade screwdriver at the base of the long plastic weld that holds the contact end cap to the toner hopper. Pry up on the screwdriver to break the weld. (See Photo 11)

Photo 12

Step 10
Using a 3/32 inch drill bit, drill a hole into the two plastic welds. The holes will be used to reattach the end cap to the waste hopper with screws. (See Photo 12)

© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

HP4250/4350 Technical Instructions
Photo 13

3

Step 11
Place a small flat blade screwdriver at the base of the three plastic welds that hold the end cap to the toner hopper. Pry up on the screwdriver to break the welds. (See Photo 13)

Step 16
Remove the screw holding the drum axle. (See Photo 18) Remove the axle.

Photo 14

Step 12
Insert a flat blade screwdriver between the toner hopper and the contact end cap, next to the plastic welds that hold the end cap to the toner hopper. Carefully pry the end cap away from the toner hopper. (See Photo 14) Remove the end cap.

Photo 18

Photo 15

Step 13
Using diagonal cutters cut the 3 plastic welds flush with the contact end cap. (See Photo 15)

Step 17
Lift the drum by the small gear and pull the drum from the bearing hub. (See Photo 19)

Photo 19

Photo 16

Step 14
Rotate the cartridge 180°. Remove the 4 screws holding the gear housing end cap. (See Photo 16)

Photo 17

Step 15
While holding the opposite end of the cartridge, remove the gear assembly end cap from the cartridge. (See Photo 17) Separate the two sections and set the toner hopper aside.

© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

4
Photo 22

HP4250/4350 Technical Instructions
Step 20
NOTE: This step is only for the HP4350. Using a Dremel with a cutting bit cut away the retaining wall that prevents the wiper blade from being removed. (See Photo 22)

Step 18
Remove the PCR from the PCR saddles. (See Photo 20) NOTE: If you are going to reuse the PCR clean the roller using a lint free cloth and DI water.
Photo 23 Photo 20

Step 21
Remove the 2 screws holding the wiper blade. (See Photo 23) Remove the blade.

Step 22
Dump the waste toner from the hopper. Clean the hopper using dry compressed air or a vacuum.

Step 19
In order to remove the wiper blade, pull the OEM sealing foam material away from the wiper blade. (See Photo 21) NOTE: The OEM sealing foam material is sticky and is not easily removed.

Photo 24

Step 23
Apply padding powder to the new wiper blade and place the blade onto the waste hopper. Install the 2 screws that hold the blade in place. (See Photo 24)

Photo 21

Photo 25

Step 24
To seal the area around the wiper blade use an expanding foam with an adjustable bead. Apply the foam along the edge of the blade and in the square holes on the ends. (See Photo 25)

Photo 26

Step 25
Clean the PCR saddles using a swab and alcohol. (See Photo 26)

© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

HP4250/4350 Technical Instructions
Photo 27

5

Step 26
Apply new conductive grease to the black contact saddle. Install the cleaned PCR. (See Photo 27)

Step 32
Remove the screw that holds the mag roller end plate. (See Photo 32)

Photo 32 Photo 28

Step 27
Apply high temperature grease to the bearing hub before installing the drum. Apply padding powder to the drum. Slide the drive gear into the bearing hub. (See Photo 28)

Step 33
Using needle nose pliers remove the hinge pin from the mag roller end plate. (See Photo 33)
Photo 29

Step 28
Install the contact end plate. (See Photo 29) NOTE: Make sure the contact plate sits flush with the end of the waste hopper.
Photo 33

Photo 30

Step 29
Install the screw that holds the contact plate in position. (See Photo 30)

Step 34
Remove the mag roller tension spring. (See Photo 34)

Step 30
Place the waste hopper aside in a protected area out of the light.
Photo 31

Photo 34

Step 31
Remove the mag roller drive gear housing from the end of the toner hopper. (See Photo 31) Remove the mag roller drive gear.
© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

HP4250/4350 Technical Instructions
Photo 35

6

Step 35
Pull the mag roller end plate from the toner hopper. (See Photo 35) NOTE: Do not lose the bearing that sits inside the mag roller end plate. (See Photo 36)

Step 39
Lift the plastic scrapers and mylar shims off each end of the doctor blade. (See Photo 41)

Photo 36 Photo 41

Photo 37

Step 36
Lift the free end of the mag roller, slide the roller out of the mag roller end plate on the opposite side of the toner hopper. (See Photo 37) NOTE: Do not lose the bearing that sits inside the mag roller end plate. (See Photo 38)

Step 40
Lift the doctor blade from the toner hopper. (See Photo 42) If you plan on using the doctor blade again, clean the doctor blade using dry compressed air or a vacuum, then using a lint free cloth and DI water.

Photo 38

Step 41
Dump the old toner out of the toner hopper. Using dry compressed air or a vacuum, clean out the hopper.

Step 42
Photo 39

Step 37
Remove the mag roller bearings from the each end of the roller. (See Photo 39) Clean the mag roller using dry compressed air or a vacuum, then using a lint free cloth and a mag roller cleaner. Clean the mag roller bearings using alcohol and a lint free cloth.

Fill the toner hopper with the correct amount of toner depending on the cartridge type you are building.

Photo 42

Photo 40

Step 38
Remove the 2 screws holding the doctor blade. (See Photo 40)
© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

HP4250/4350 Technical Instructions
Photo 43

7

Step 43
Place the new or cleaned doctor blade onto the toner hopper. Place the mylar shims and the plastic scrapers on each end of the doctor blade. Install the 2 screws holding the blade in place. (See Photo 43)

Step 49
Place the mag roller drive gear housing onto the end of the mag roller, making sure the keyed end of the magnet fits into the gear housing. (See Photo 50)

Photo 44

Step 44
Slide the black mag roller bearing onto the contact end and the white bearing onto the drive gear end of the mag roller. Slide the mag roller contact hub into the mag roller bearing plate on the toner hopper. (See Photo 44)

Photo 50

Photo 45

Step 45
Align the mag roller bearing end plate to the toner hopper and slide the end plate onto the toner hopper. (See Photo 45)

Photo 46

Step 46
Install the mag roller tension spring and the screw into the mag roller bearing end plate. (See Photo 46)

Step 50
Using a 3/32-drill bit, drill a hole next to the toner sensing contact on the cartridge contact end cap as shown in photo 51.

Photo 47

Photo 51

Step 47
Install the hinge pin into the mag roller bearing end plate. (See Photo 47)

Step 48
Slide the mag roller drive gear onto the mag roller. (See Photo 48) NOTE: Make sure the two injection molding points on the mag roller drive gear face outward. (See Photo 49)
Photo 49

Photo 48

© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

8
Photo 54

HP4250/4350 Technical Instructions
Step 53
Insert the HP4200PIN into the drilled hole in the bottom of the contact end cap. (See Photo 54)

Step 51
Join the toner hopper and waste hopper together. Place the cartridge gear housing end cap onto the side of the cartridge. Install the 4 screws that hold the end cap in place. (See Photo 52)

Photo 55

Step 54
Install the keyed end of the drum shutter bar into the gear housing end cap. (See Photo 55)

Photo 52

Step 55
Photo 56

Install the non-keyed end of the drum shutter bar into the contact end cap. (See Photo 56)

Step 56 Step 52
Place the contact end cap onto the end of the cartridge. Install the 2 screws that hold the end cap in place. (See Photo 53)
Photo 57

Slide the drum shutter arm onto the positioning post. Push the drum shutter arm into the drum shutter. (See Photo 57) Slide open the drum shutter to engage the tension spring.

Photo 53

Step 57
Place one probe of an Ohmmeter on the toner sensor contact and place the other probe into the hole that was drilled next to the contact. (See Photo 58) Locate the sensor bar that comes out from the toner hopper through the hole drilled in the end cap, making sure you have a low resistance connection. (See Photo 59) NOTE: If contact is not made between the sensor bar and the contact on the end plate this will result in an error "54.1 Remove Sealing Tape" or if contact is lost during usage a premature toner low can occur.

Photo 58

Photo 59

Step 58
© 2008 Future Graphics, LLC. All rights reserved. Future Graphics (FG) is a distributor of compatible replacement parts and products for imaging equipment. None of FG's products are genuine OEM replacement parts and no affiliation or sponsorship is to be implied between FG and any OEM.

Test cartridge.

E-mail: [email protected]

Website: www.futuregraphicsllc.com