Question about HP Officejet Pro L7650 Printer
Cleaned print heads, attempted to change out to new print heads, but alignment issue occurred. I cleaned old print heads and alignment corrected itself, however I'm still getting a significant amount of magenta on all my self test pages.
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Magenta print out very light
This is caused by dust in the scanner assembly. There's a fan right by the magenta laser scanner that blows dust and particulate matter in the air directly on that laser scanner.
Requiring its removal and careful cleaning of all lenses and mirrors. Unfortunately, this is not covered in the service manual. Getting the laser/scanner out is not too bad: Start by removing the printer covers, the rear plate, and the plate on which the DC controller and formatter mount. Remove the four laser/scanner unit corner screws and the single screw for its cover. Be careful to remove the small shutter spring on the cover before removing the cover. Use a strong flashlight to carefully examine the copper-colored mirrors for dust. Use dry cotton swabs to carefully clean all dust from the mirrors and the lenses. Blow dirt and dust from the inside of the scanner box. You will notice that the bottom mirror, facing up, is the one with the most dust.
Posted on Jul 23, 2008
If you're setting up the printer or changing the toner or ink cartridge for the first time, double-check the instructions to make sure that you installed the cartridge correctly and, for new printers, that you have removed all the pieces of cardboard or plastic packing material.
Check to see whether paper is feeding from the paper tray. If it's not leaving the tray at all, try feeding a page manually (if that's an option) or using a different paper tray. Sometimes a problem with the tray can be traced to a broken spring or a piece of plastic.
If paper is feeding from the tray but jamming in the printer, examine where the jam is occurring and then inspect the printer carefully to see if you can find what is causing the problem. A piece of paper, for instance, might be blocking the paper path.
If paper is feeding through the printer but coming out blank, check to see whether the printer is out of toner or ink. A defective toner or ink cartridge could be the problem.
Posted on Dec 04, 2008
SOURCE: I have hp8250 photosmart printer
Driver could be corrupt.
Disconnect the printer or at least be sure it is turned off. I'd do both and reinstall the CD software program that came with the printer. When the software program asks you to connect the printer to the USB port, do so and it should again work properly.
Hope this helps. Bud
Posted on Jan 25, 2009
As with all of the solutions I've provided on this and the other HP88 printers, the problem is that the black printhead has become clogged due to the conditions the printer is kept in.
For some reason the pigment black ink in the HP88 printhead is particularly prone to clogging when used in hot, dry conditions where there is air conditioning or similar...
The only solution I have found to date is to replace the black ink with a dyebase alternative and use that with a new printhead. Finding this solution took me about 14 printheads and a lot of head scratching so it wasn't easy...
Finding a dyebase alternative may be difficult but whatever you do, make sure you purchase a remanufactured original HP OEM, not one of the all plastic designs with no black rubber bulb in the bottom of the printer. They fail and leak a LOT!.
Hope that helps..
Posted on Jul 11, 2009
please if you are not professional technician then don't do this.but you can use some cartridge head cleaning solution.on the print head.if problem not solve then replace the cartridge.
Posted on Jan 12, 2011
Tips for a great answer:
Aug 23, 2012 | HP Color LaserJet 9500HDN Printer
Jul 29, 2011 | Brother HL4040CDN Duplex Unit
1. Press Menu to open the MENUS.
2. Press to highlight DIAGNOSTICS, and then press .
3. Press to highlight PQ TROUBLESHOOTING, and then press .
The message PRINTING... PQ TROUBLESHOOTING appears on the control-panel display until the
printer finishes printing the PQ troubleshooting pages. The printer returns to the Ready state after
printing the PQ troubleshooting pages.
the pages it produces are individual colors, black, magenta, yellow and cyan and a white page and a config sheet.If the defect is on all pages then it might be a bad transfer belt. If it is only on one of the color pages, that will tell you which cartridge is bad.
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