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  1. #1
    Senior Tech 250+ Posts
    ir5055 half light


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    ir5055 half light

    Canon ir5055 has intermittent light copies down half of the page. This happens on prints and copies. Very intermittent, tech made about 200 copies without an issue, then 2 pages came out like this. We have replaced all the primary corona assemblies and the HVT pcb. Any ideas?

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  2. #2
    teacher-guide-expert-guru 2,500+ Posts
    ir5055 half light

    zoraldinho's Avatar
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    Re: ir5055 half light

    What about developer?

    Practice makes perfect
    If it ain't broke, don't fix it
    There's no such thing as a free lunch
    A picture is worth a thousand words
    If you want something done right, you have to do it yourself


  3. #3
    Field Supervisor 500+ Posts dan7777's Avatar
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    Re: ir5055 half light

    Quote Originally Posted by repeatcopiers View Post
    Canon ir5055 has intermittent light copies down half of the page. This happens on prints and copies. Very intermittent, tech made about 200 copies without an issue, then 2 pages came out like this. We have replaced all the primary corona assemblies and the HVT pcb. Any ideas?
    Luckily I only have one or two of those left and rarely see them. When I first looked at it looked like something on laser glass but if it is intermittent maybe something like drum ground? could be charge, laser, or drum ground. I am not sure what the contacts on the back of the drum do.


  4. #4
    Field Supervisor 500+ Posts Phil B.'s Avatar
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    Re: ir5055 half light

    Quote Originally Posted by repeatcopiers View Post
    Canon ir5055 has intermittent light copies down half of the page. This happens on prints and copies. Very intermittent, tech made about 200 copies without an issue, then 2 pages came out like this. We have replaced all the primary corona assemblies and the HVT pcb. Any ideas?
    what is the life count on the drum and developer ?


  5. #5
    Senior Tech 250+ Posts
    ir5055 half light


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    Re: ir5055 half light

    Quote Originally Posted by Phil B. View Post
    what is the life count on the drum and developer ?
    800,000


  6. #6
    Field Supervisor 500+ Posts Phil B.'s Avatar
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    Re: ir5055 half light

    Quote Originally Posted by repeatcopiers View Post
    800,000
    and the expected life is what 600,000? sounds a little high...


  7. #7
    Senior Tech 250+ Posts
    ir5055 half light


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    Re: ir5055 half light

    Quote Originally Posted by Phil B. View Post
    and the expected life is what 600,000? sounds a little high...
    Service Manual says 1,000,000 on developer but it sounds like the developer is a good idea to try next.


  8. #8
    Senior Tech 250+ Posts
    ir5055 half light


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    Re: ir5055 half light

    Quote Originally Posted by repeatcopiers View Post
    Service Manual says 1,000,000 on developer but it sounds like the developer is a good idea to try next.
    Developer didn't fix it so we will try the drum tomorrow.


  9. #9
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    Re: ir5055 half light

    Quote Originally Posted by repeatcopiers View Post
    Canon ir5055 has intermittent light copies down half of the page. This happens on prints and copies. Very intermittent, tech made about 200 copies without an issue, then 2 pages came out like this. We have replaced all the primary corona assemblies and the HVT pcb. Any ideas?
    Obviously,it's a transfer problem. Replace the wires of pre-trasfer assy. and transfer assy..(or,replace these two assys.) Then get into service mode , COPIER > OPTION > BODY>TR_SP_C1(C2,C3,C4,MF,DK) ,set these items to 2.


  10. #10
    Tech Specialist 1,000+ Posts Canuck's Avatar
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    Re: ir5055 half light

    Possibly HVT connector for transfer/sep corona assembly. They crack and leak. Its the one that the contacts on the rear of the trans/sep assembly make contact with when you close drawer and latch handle to lift the assembly. Look in the Alarms in service mode for clues...


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