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Thread: hp dj T790

  1. #1
    Senior Tech 100+ Posts 1stcavvet's Avatar
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    hp dj T790

    If I attach the cutter to this machine, it goes to the left side after a good print and tries to cut the paper--- travels about 5-6 inches from the left side the carrier stops and shows an 86.10 paper jam,(this is also happening with a new cutter assembly) if I remove the cutter the machine shows no problem.the machine prints and the customer has to manually cut the paper. I was thinking the rear bushing is probably gone and the carrier is dragging in the front -----Looking for any other ideas------ machine is 2-3 years old and hardly gets used


  2. #2
    Service Manager 1,000+ Posts theengel's Avatar
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    Re: hp dj T790

    Have you cleaned and oiled the rail?

    If the rail was dirty and causing a lot of resistance, then the added cutter resistance could be the straw that breaks the back and finally throws up the error.


  3. #3
    Senior Tech 250+ Posts
    hp dj T790

    Kiran Otter's Avatar
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    Re: hp dj T790

    Wow, I had this EXACT problem recently. I thought it was something to do with the belt so I started to replace it. When I removed the carriage, I realized the belt wasn't even attached to it! The carriage was broken where the two posts that hold the belt to the carriage were. How it worked at all... I don't know. I think this is a result of the end user trying to force the carriage to move, either during a jam or some other time.

    hp dj T790-2017-09-18-14-59-40-jpg

    When I showed it to HP, they said yup! They'd seen that before.

    So maybe this is your problem.

    Kiran

    Attached Images Attached Images

  4. #4
    Senior Tech 250+ Posts
    hp dj T790

    Kiran Otter's Avatar
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    Re: hp dj T790

    Also, note the correct position for the belt as it threads in the carriage.

    hp dj T790-image001-jpg

    Attached Images Attached Images

  5. #5
    Service Manager 1,000+ Posts theengel's Avatar
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    Re: hp dj T790

    Quote Originally Posted by Kiran Otter View Post
    Wow, I had this EXACT problem recently. I thought it was something to do with the belt so I started to replace it. When I removed the carriage, I realized the belt wasn't even attached to it! The carriage was broken where the two posts that hold the belt to the carriage were. How it worked at all... I don't know. I think this is a result of the end user trying to force the carriage to move, either during a jam or some other time.

    When I showed it to HP, they said yup! They'd seen that before.

    So maybe this is your problem.

    Kiran

    I had one break there... but it wasn't moving at all. And I'm pretty sure it broke because the user was trying to force the carriage to move.


  6. #6
    Senior Tech 250+ Posts
    hp dj T790

    Kiran Otter's Avatar
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    Re: hp dj T790

    Any update on this, 1stcavvet? I'm curious what you found.

    Kiran


  7. #7
    Senior Tech 100+ Posts 1stcavvet's Avatar
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    Re: hp dj T790

    Yup!!! belt attaching area was broken the 2 outer lugs were missing, I took the carrier out of the machine and when I turned around with the carrier in my hand the belt fell on the floor I can't believe it would even print


  8. #8
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    hp dj T790

    Kiran Otter's Avatar
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    Re: hp dj T790

    Yeah, exactly what I had. Thanks for the update!

    Kiran


  9. #9
    Service Manager 1,000+ Posts theengel's Avatar
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    Re: hp dj T790

    I wonder if there's a way to repair those with some kind of clamp. The next time I run across this, I think I'll try. The problem is that aside from keeping the belt clamped down, those two posts also affect belt size because they make a little curve in the belt.


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