Remanufacturing HP LaserJet CP1025 Series Color Toner Cartridges
- By Mike Josiah
- May 01, 2011
In January 2011, Hewlett-Packard released the LaserJet CP1025 series of color laser printers, which are based on a 17-ppm black and 4-ppm color, 600-by-600-dpi engine.
These cartridges and the printers take a page from the old HP color LaserJet 4500 machines. The printer is a carousel type with a central drum unit. The toner cartridges just have the toner and developer rollers. There are no drum or waste sections.
The cartridges for this printer are rated for 1,000 color pages and 1,200 black-and-white pages. These cartridges also have a series part number and a specific cartridge part number, so it’s a bit confusing. The part numbers and info on them is:
HP 126A Black, CE314A, 1,200 pages, $49.99 ea*
HP 126A Cyan, CE311A, 1,000 pages, $55.99 ea*
HP 126A Magenta, CE313A, 1,000 pages, $55.99 ea*
HP 126A Yellow, CE312A, 1,000 pages, $55.99 ea*
HP 126A Drum Unit, CE314A, 14,000 pages black, 7,000 pages color, $79.99*
*Pricing as of March 2011
The cartridges seen so far do not use an airbag type of insert in the box; they use a cardboard fold-around type. See Figure A. They do, however, have a developer roller cover. See Figure B.
The only machine released so far in this series is the CP1025W.
These are very simple, easy cartridges to remanufacture. While the OEM costs are low, they will be simple enough and fast enough to make doing them worthwhile.
Cartridge troubleshooting, running test and cleaning pages, and some simple printer troubleshooting will be covered at the end of this article.
As stated above, this series of printers uses a carousel-type system. Figure C shows the basic parts layout and lists what each part is.
- Phillips-head screwdriver
- Small common screwdriver
- Needle-nose pliers
- Jewelers screwdriver set
- HP CP1025 dedicated toner
- Replacement chip (dedicated)
- Developer roller
- Doctor blade (optional)
- Sealing strip (optional)
- Cotton swabs
- Isopropyl alcohol
- Drum-padding powder
- Conductive grease
1) With the white plastic handle on top and the label facing you, remove the two left-side screws and white plastic end cap from the cartridge. See Figures 1 and 2.
2) On the gear side of the cartridge, remove the two screws from the black plastic end cap. Note the spring-loaded drive gear. The spring and drive gear will stay with the end cap when removed; there is no need to remove them separately. See Figures 3, 4 and 5.
3) Remove the black plastic end cap.
4) Remove the two small gears. See Figure 6.
5) Remove the screw from the inner white end cap. See Figure 7.
6) Remove the white plastic inner end cap. See Figure 8.
7) Remove the developer roller. Clean with a lint-free cloth and place aside. We do not recommend any chemicals be used to clean this roller. See Figure 9.
8) Remove the two screws and doctor blade. See Figure 10.
9) Clean out all the remaining toner from the hopper and feed roller. See Figure 11.
10) Remove the white seal plug from the chip side of the cartridge. See Figure 12.
11) Fill the hopper with the appropriate color CP1025 dedicated toner. See Figure 13.
12) If you are using a seal, install it now. Make sure the tail of the seal comes out through the seal plug hole. See Figure 14.
13) Install the seal plug. Make sure the fins are on the bottom side and that the plug fits over the seal. See Figures 15 and 16.
14) Install the doctor blade and two screws. Note: The doctor blade must be gapped for the cartridge to work properly. The doctor blade gap is set from the back 90-degree edge of the blade, not the top or screw side. In other words, the gap is to set the distance of the edge of the doctor blade to the developer roller, not the height of the blade. Use either doctor blade shims or set the gap manually to 1.8 mm. See Figures 17 and 18.
15) Install the foam washer onto the feed roller shaft. See Figure 19.
16) Install the white end cap onto the gear side of the cartridge. Install the screw as shown. See Figure 20.
17) Install the developer roller long-shaft side, or non-chip side, to the gear of the cartridge. See Figure 21.
18) Install the opposite-side white end cap and two screws. See Figure 22.
19) Install the two gears on the developer roller shaft and feed roller shaft. See Figure 23.
20) Install the black end cap and two screws. Make sure the drive gears are meshed properly and the spring on the black drive gear is in place. See Figures 24 and 25.
21) Slice off the top of the chip holder and replace the chip. See Figure 26.
22) Install the developer roller cover. See Figure 27.
Repetitive Defect Chart
OPC drum: 95 mm
ITB drive roller: 76 mm
Lower pressure roller: 63 mm
Upper fuser film: 58 mm
Transfer roller: 47 mm
PCR: 26 mm
Developer roller: 22 mm
Running Test Pages
Press and hold the Resume button for 2 to 3 seconds. The configuration page and supplies status page will print.
Running the Cleaning Page
The cleaning page for these machines can only be run from the Printer menu. HP recommends that a transparency be used to obtain the best results. If a transparency is not available, use copier-grade paper with a smooth surface.
To run this page, right-click on Device Settings in the Windows system tray, then click on the printer name. Click the Device Settings tab, then click the Print Cleaning Page tab. The page will start and stop. Do not turn the printer off until the cleaning page has finished printing.
Contact Mike Josiah at www.uninetimaging.com.
This article originally appeared in the May 2011 issue of Recharger.
Mike Josiah is East Coast Technical Director at UniNet East Coast, a global distributor of toner, OPC drums, wiper blades and other supplies. He and his technical support team regularly contribute articles to Recharger Magazine and teach seminars at association meetings and trade shows.