Question about Konica Minolta Bizhub C451 Printer/scanner/finisher

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Bizhub C451 printing black smudges across page

Printing Black smudges across the page

Posted by Anonymous on

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

sladdin810
  • 3 Answers

SOURCE: Bizhub C451 error C-3924

This points to the fuser unit lamp being broken.

You can try a trouble reset by switching the machine off with the main power button only (in the flap on the front in the square panel), then whilst holding down the UTILITY/COUNTER button, turn back on. When a black circle appears in the top right corner of the screen you can release the UTILITY button.

When TROUBLE RESET appears on the screen press it. The display should say OK.
Then power the machine off and on again. If the code reappears you need a service call to make sure everything is same as the fuser code appears for your safety.

Posted on Sep 20, 2012

viz5445
  • 2 Answers

SOURCE: Bizhub C451 error C-3924

c7ff0589-2c1c-428b-8214-5be985c427d0.jpgkonica minolta c451 printing problem

Posted on Dec 19, 2013

  • 15441 Answers

SOURCE: My bizhub c451 is still printing only cyan and black after we change toner catridge, what could be the problem please

The problem could be the laser that scans the image or the detectors that see the colors. It could also be a problem with the power supply or the main board. This is not going to be cheap. If you want to continue, you should download the service manual.
http://www.printcopy.info/?mod=docs&brand=Konica-Minolta&gID=15037

Posted on Jul 20, 2015

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1 Answer

I have a KM bizhub c 451 black imaging unit that prints faintly. I have replaced the following parts, PC drum, PC charger and starter( developer), yet it is not printing solid black.


replace the black image unit as a whole you do not replace the units as individual parts. Where did you get the drum from? or the PC charger as they come as one and you don't replace the developer as it is located inside the unit!!!!!!

Mar 22, 2017 | Konica Minolta Bizhub C451 Copier Print...

1 Answer

What's your question? my konica minolta c451e printing machine showed me an error code p21, what could that mean and it is not printing any image but black-green shade


P-21 - Color regist test pattern failure
• The number of points detected in the main scan direction is more or less than the specified value during main scan direction registration correction.
• The number of points detected in the sub scan direction is more or less than the specified value during sub scan direction registration correction.

P-21: Color regist test pattern failure
Relevant parts:
• Transfer belt unit
• PH unit
• Printer control board (PRCB)
Step/Action:
1/ Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
2/ Change the image transfer belt unit if the transfer belt is damaged.
3/ Change the PH unit.
4/ Change PRCB.

(See Service Manual, pages 599, 603):
http://www.imcopexamerica.com/service-books/Bizhub/Color/bizhubC451_C550_C650FieldSvc.pdf

See also here:
Konica Minolta Bizhub c451 Reparacin de Fotocopiadoras YoReparo
Thread Problemas na C451 7 21

May 31, 2015 | Konica Minolta Office Equipment & Supplies

1 Answer

My bizhub c451 suddenly started printing and copying nothing but colourful dots and lines all over the page. even with a test page i can only see a windows logo and all dots and lines, no text. even


Make sure the ink cartridge is full or new. Get to the "Maintenance" page and try an alinement. (The ink dries and will clog the jets if not used often enough.)

Jan 01, 2015 | Konica Minolta Bizhub C451...

1 Answer

Konica Minolta BizHub C451 printing red lines down documents


your imaging unit is damaged. call minolta guys to have a look it at and change it if neccessary

Mar 30, 2009 | Konica Minolta bizhub C450P Laser Printer

1 Answer

Printing black smudges across the page at 10 cm intervals


Most likely cause by the drum unit. Replace drum or upgrade printer.

Jan 24, 2009 | Brother HL 1030 Laser Printer

1 Answer

Black ink smudges for color print mode only, not for grayscale


- Try to reallign the cartridge, run a print test, after that if the issue still persist - uninstall and reinstall software - run test and re-allign again the cardtridge using software. run print test again.

Oct 08, 2008 | Samsung CLP 300 Laser Printer

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