C2770 on Alphard Venus (CS-4550ci)

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  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 22755
    #1

    C2770 on Alphard Venus (CS-4550ci)

    This one is so dumb I just had to share. I didn't discover the fix. Credit goes to Big Fat Pauly (you know who you are).

    The C2770 error is a transfer belt shift error. On the new Alphard series, the transfer belt has a mechanism to center the transfer belt, in case it starts to walk off one side of the pulleys. And it works great until you install the AK-730 bridge unit.

    On instruction 19. they tell you to install the front left stay with the 20mm long black screws. If you follow that instruction the bottom screw will press against the transfer belt cleaning unit, preventing it from self-adjusting, and forcing the belt gradually off one side. The fix is laughably simple. Install 12mm long screws for the front left stay.

    This was discovered in class. You know how after 10 or 20 disassemblies the test machines end up with all the wrong screws in the wrong places? The 30mm long screws for the latching bracket caused an immediate code C2770. With the 20mm long screws it takes about 15K prints to walk off it's pulleys, but same affect.
    C2770.JPG

    How dumb. =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=
    Tags: attachment kit, belt, black, bridge, code, error, left, side, test, transfer, unit, walked
    • correo.tony
      Technician

      50+ Posts
      • Feb 2009
      • 72
      #2
      Re: C2770 on Alphard Venus (CS-4550ci)

      intelligent appreciation

        Comment

        • Metalvoc
          Trusted Tech

          100+ Posts
          • Sep 2008
          • 155
          #3
          Re: C2770 on Alphard Venus (CS-4550ci)

          wow, thanks for posting that. That sounds like the kind of problem where I would have spent the afternoon beating my head against a wall!
          I must have a prodigious quantity of mind; it takes me as much as a week sometimes to make it up - Mark Twain

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22755
              #4
              Re: C2770 on Alphard Venus (CS-4550ci)

              Update: I ended up replacing the TR-8505 transfer belt assembly today. It has again 5mm off center.

              If it wasn't under warranty I would have busted my way into the belt shifting mechanism. But alas, I have to return it. When I get one to the maintenance interval I'll dig into it. I seem to recall from class that there is a small DC motor with a worm gear drive.

              An interesting side affect is a J2316 and a J0000 accompanies each C2770, all with exactly the same count on the Event Report. =^..^=
              If you'd like a serious answer to your request:
              1) demonstrate that you've read the manual
              2) demonstrate that you made some attempt to fix it.
              3) if you're going to ask about jams include the jam code.
              4) if you're going to ask about an error code include the error code.
              5) You are the person onsite. Only you can make observations.

              blackcat: Master Of The Obvious =^..^=

                Comment

                • Metalvoc
                  Trusted Tech

                  100+ Posts
                  • Sep 2008
                  • 155
                  #5
                  Re: C2770 on Alphard Venus (CS-4550ci)

                  The jam code is referring to a conveying sensor, which would make sense if the device was printing when the error occurred. The J0000 with the same meter would be likely if the customer tried to fix the problem by turning the machine off/on with paper still jammed inside.

                  So you are saying it may not have been due to the interfering screw in the attachment kit?
                  I must have a prodigious quantity of mind; it takes me as much as a week sometimes to make it up - Mark Twain

                    Comment

                    • blackcat4866
                      Master Of The Obvious

                      Site Contributor
                      10,000+ Posts
                      • Jul 2007
                      • 22755
                      #6
                      Re: C2770 on Alphard Venus (CS-4550ci)

                      For me, the screw may not have been the cause, or the only cause at any rate. I really would have liked to examine the mechanism more closely, but didn't want to void the manufacturers warranty. The belt had walked 5mm off center, to the rear I think.

                      The next time you pull the transfer belt, take a peek in the opening. You can see the screw. And it is a good 8mm longer than it needs to be. And there isn't much room to spare. I can see how it would be a problem. =^..^=
                      If you'd like a serious answer to your request:
                      1) demonstrate that you've read the manual
                      2) demonstrate that you made some attempt to fix it.
                      3) if you're going to ask about jams include the jam code.
                      4) if you're going to ask about an error code include the error code.
                      5) You are the person onsite. Only you can make observations.

                      blackcat: Master Of The Obvious =^..^=

                        Comment

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