Question about HP Color LaserJet 4550n Printer

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Hp clj 4550n printing blank pages - HP Color LaserJet 4550n Printer

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You can install an updated transfer belt but that is expensive.

Try this,,, it's just a kludge but it worked for me for over a year till I wore out the old belt.:
After starting the printer - and after it warms up and says Ready, Open and close the REAR door. This will cause the printer to recalibrate.
After it says ready for the 2nd time, try to print something.

Posted on Sep 04, 2009

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Blank or white pages
 Your software application is sending an extra page-eject
• Check the software’s printing configuration information.
 There is a problem with the network configuration. Some sharing
devices on networks may generate a blank page as a separator.
• Check with the network administrator.
 The printer may be feeding two or more pages at once because
the paper is difficult to separate.
 The sealing tape has been left in the toner cartridge.
 The toner cartridge is empty or defective.
 The laser scanner door does not open properly.
• Remove and reseat the toner cartridge.
• Check the laser scanner shutter door for proper operation.
 The toner cartridge guide is damaged, improperly positioned, or
 There is no transfer roller voltage.
• Perform the Half Self-Test Functional Check to check all other
electrophotographic processes.
• Replace the transfer roller if necessary.
 The high-voltage connectors are mounted on the high-voltage
power supply (HVPS) PCA and protrude into the toner cartridge
• Check the springs for functionality. Clean if dirty; replace if
defective or missing.
• The HVPS PCA is defective.
 The DC controller PCA is defective.
 There is no developing bias.
• Clean the HVPS contacts. With no developing bias charge,
toner is not attracted to the drum.
 There is no drum ground path.
• Check the drum ground.
 The laser scanner cable assembly is defective.
 The page length and margins are not set correctly for the paper
size. Verify that the ribbon connector at J1307 of the HVPS is
properly seated.
 If the HVPS has been removed recently, verify that the ribbon
connector from the DC controller PCA to the HVPS is properly
seated at both ends.
 Verify that the photoconductive drum is rotating properly. Perform
the drum diagnostic test to visually observe if the drum is rotating
or using a felt-tipped marker place an index mark on the edge of
the drum outside the image area. Turn on the printer (wait for
drum rotation to occur), and then look to see if the drum has
moved. If the drum has not moved, investigate the mechanical
and electrical drum rotation circuitry and movement mechanisms.
 The imaging drum shutter may not be retracting. Replace the
imaging drum.
I hope that this helps

Posted on May 12, 2009

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Replace the transfer belt. Known issue with this machine.
Hope this helps

Posted on May 12, 2009

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Hi, I notice you have ruled out the transfer belt as asolution because it has 59% life left. Not to be rude but this does not exclude the transfer belt as the problem. I am 98%-100% sure that if you change the trasnsfer belt you will solve your problem.

I was doing work for a large corp. that sent a guy from Ohio to Colorado twice for this problem before he asked my opinion I told him tranfer belt. He was a Hero.
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Printer prints blank pages.

 it a transfer belt issue....there is a test you can perform to confirm. When the first page comes out of the printer blank, open and close the back cover. If the next page comes out with print on it, then the transfer belt is the issue. One thing you can try is take the old belt down to a service station with a good air compressor and then use the air compressor to blow the heck out of the belt until no more toner comes out.

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ok typical carousel misalignment

just take a big screwdriver and check for stuck cartridges

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