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  1. #11
    Service Manager 5,000+ Posts
    C552 colour print issues

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    Re: C552 colour print issues

    Quote Originally Posted by ECA View Post
    Hi guys
    ive got colour print issues. i tried to get a local tech out to me but they were useless when he turned up.

    the colour dont align correctly. and it differs depending on which side of the page its on.

    ive attached a test print for ref. Attachment 44741
    as you can see the yellow and red are not aligned, but only at bottom of page.


    also got yellow toner issue on one side of the page. again test print attached
    Attachment 44742
    some reason it only happens on the gradiant test print.???

    ive replaced the yellow drum unit. but no go, still got problem.


    some help please.
    I hope you didn't pay this tech sounds like he doesn't know this model at all.

    Common issue on the C552 when the transfer unit is over life.

    If you have cleaned the IDC sensors & printhead? (cleaning tool in tray 2) replace the transfer unit.
    Let us eat, drink, and be merry, because tomorrow we may die!

    For all your firmware & service manual needs please visit us at:

    www.copierfirmware.co.uk - www.printerfirmware.co.uk




  2. #12
    Senior Tech 100+ Posts
    C552 colour print issues

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    Re: C552 colour print issues

    I've seen this issue more than once be the actuator underneath the fuser have a broken tip on it. You have to remove the fuser to see this. I've also seen transfer belt, imaging units, dirty idc sensors cause this as well. Only once I have had to replace an idc sensor.

  3. #13
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    Re: C552 colour print issues

    thanks for the replies guys

    i have already taken this machine to part when i bought it years ago to get it up the 4 flights of stairs (it was so heavy)

    anyway.
    i have taken out the transfer belt before and cleaned it. and also replaced the fuser unit.

    takes ages to find parts for this. yellow drum had to be bought from australia to uk recently.

    im a tech guy, so can easily clean/remove etc. just didnt want to tweak settings that i dont know the effects.



    i think the first thing is to find the sensors and anything broken. however can you please guide me to the locations, having a hard to finding in the field manual

    link to field manual https://we.tl/t-LPMHdKD4dU


    i find it strange that the yellow can do the solid page colour, but on the gradient colour is leaves gaps???

  4. #14
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    Re: C552 colour print issues

    ok, i have removed fuser, removed transfer belt
    found the idc sensors under belt removed them

    cleaned all

    now the colour align correctly. must of been the IDC sensors

    only problem is the yellow is still missing on the gradiant print yellow.pdf

    ive tried to clean glass with the pokey tool (although its very tight to push in)

    any way to get to the glass?? cant access it when drums are all out.

  5. #15
    Former KM Senior Tech 500+ Posts srvctec's Avatar
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    Re: C552 colour print issues

    Quote Originally Posted by ECA View Post
    ok, i have removed fuser, removed transfer belt
    found the idc sensors under belt removed them

    cleaned all

    now the colour align correctly. must of been the IDC sensors

    only problem is the yellow is still missing on the gradiant print yellow.pdf

    ive tried to clean glass with the pokey tool (although its very tight to push in)

    any way to get to the glass?? cant access it when drums are all out.
    Actually you can access the laser glass when the "drums" (actually IUs for the 3 colors on this machine) are out. With the Y IU out, run the cleaning wand into the proper place and watch from above to see it. I have a special tool (actually the charge corona cleaning rod from a EP2050) to apply pressure to the end of the cleaning wand to actually get the glass clean rather than relying on the super light weight of the end of the wand to do the cleaning. It's just a long small rod with rubber on the tip so as not to damage anything while using it in such a manner. I've even gone so far as to put on a brand new clean pad on the wand, put some methyl alcohol on it and then run it through, using my tool to apply a little pressure to really get the glass clean on stubborn dirt or film from a shop environment.
    Started in the copier service business in the fall of 1988 and worked at the same company for 33.5 years, becoming the senior tech in 2004 but left to pursue another career on 4/29/22.

  6. #16
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    Re: C552 colour print issues

    Quote Originally Posted by srvctec View Post
    Actually you can access the laser glass when the "drums" (actually IUs for the 3 colors on this machine) are out. With the Y IU out, run the cleaning wand into the proper place and watch from above to see it. I have a special tool (actually the charge corona cleaning rod from a EP2050) to apply pressure to the end of the cleaning wand to actually get the glass clean rather than relying on the super light weight of the end of the wand to do the cleaning. It's just a long small rod with rubber on the tip so as not to damage anything while using it in such a manner. I've even gone so far as to put on a brand new clean pad on the wand, put some methyl alcohol on it and then run it through, using my tool to apply a little pressure to really get the glass clean on stubborn dirt or film from a shop environment.
    thanks, i'll try this.
    the first cleaning pad came off the end and got stuck in the bloody slot. managed to fish it out after about a hour of swearing.

    i'll try and push down on it. with something

    is there no way of removing the glass? or getting further into the machine to clean it?


    i also have the blue colour leaving ghost images on the next pages. how can i sort this out?

  7. #17
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    Re: C552 colour print issues

    The absoute best way to clean the PH is to remove it from the machine..It can be accessed from the paper exit side..4 or 5 screws for the cover than another 6-8 screws removes the access port. 2 ribbon cables and a couple standard connectors, then 1 shoulder screw. Take it out and (in a very clean environment) remove the top cover..One thing you can do is pull the hex mirror and clean these surfaces as well. Over years they get a build up on the leading edges of each mirror. Those cleaning rods are great at removing small amounts of dust and toner, but these machines liked to drop developer as well..E

  8. #18
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    Re: C552 colour print issues

    Quote Originally Posted by emujo2 View Post
    The absoute best way to clean the PH is to remove it from the machine..It can be accessed from the paper exit side..4 or 5 screws for the cover than another 6-8 screws removes the access port. 2 ribbon cables and a couple standard connectors, then 1 shoulder screw. Take it out and (in a very clean environment) remove the top cover..One thing you can do is pull the hex mirror and clean these surfaces as well. Over years they get a build up on the leading edges of each mirror. Those cleaning rods are great at removing small amounts of dust and toner, but these machines liked to drop developer as well..E
    Sounded like delicate surgery....
    but i have done it.! was a lot of sticky mess on the glass. all good now. THANK YOU

    I even went further into the machine and took out the exit rollers to clean them. that was harder work that the PH

    Gave everything a good clean.

    all printing fine now.

    only small issue is blue is ghsoting across pages. i assume this is the blue drum?

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