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‎03-30-2025 11:07 AM

HP Recommended
Product: HP Color LaserJet Pro MFP M477fdn
Operating System: Microsoft Windows 11

I read and tried already the solution from "https://h30434.www3.hp.com/t5/Printing-Errors-or-Lights-Stuck-Print-Jobs/How-do-I-fix-the-color-alig....

Unfortunately, it doesn't function for me.

After multiple color calibrations after a printer reset to factory settings there is still a horizontal shift of magenta channel vs. CYK and vertical shift of yellow channel vs. CMK channels.

Is there any possibility to shift and/or scale the particular color channels manually? The automatic calibration obviously fails...

Any ideas are warmly welcome.

- Marcin

WIN_20250330_18_21_51_Pro.jpg

2 REPLIES 2

‎03-30-2025 11:24 AM

HP Recommended

Have you cleaned the registration sensor? To explain, registration on these printers occurs by using the K channel as default and always assumed to be correct and CMY are aligned to K. Dirty sensors and third party toners can mess with this process as the density of toner is different than OEM. Dirty sensors will cause issues with OEM and third party. Sensors are inside the front door as they read swathes printed to the transfer belt to perform calibration.

If you find the information provided useful or solves your problems, help other users find the solution easier by marking my post as an accepted solution. Clicking "yes" on "was this reply helpful" also increases the chances that this solution will help others.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.



1 person found this reply helpful
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‎03-31-2025 06:17 AM

HP Recommended

Thank you Repairatrooper for your idea!

No, I haven't yet.

I'm studying now the "Color LaserJet Pro MFP M477 Repair Manual" -  it seems pretty tricky to access the registration density sensor.

Is there a possibility to clean it without disassembly of ITB and the associated parts?

BTW, I'm using the original HP toner cartridges only.

- Marcin

 

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