GR 3770 "T14 CALL SERVICE" + Drum won't come out

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  • hatchclown
    • Jan 2025

    [Error Code] GR 3770 "T14 CALL SERVICE" + Drum won't come out

    I just purchased my first Risograph. I just went to make my first master and was met with a "T14 CALL SERVICE" error message. Now I cannot remove the print cylinder. When I press the green button nothing happens and it doesn't light up. I've looked around the forums and the web at large and haven't found any solutions. Any assistance would be greatly appreciated.

    Thank you in advance.
  • djdan73
    Technician

    50+ Posts
    • Oct 2008
    • 64

    #2
    you have a clamp error it may be the magnet on the back of the drum or the clamp plate motor is not coming down all the way. a good way to be able to get the drum out is to take a screw driver and release the drum release lever located in the slot below the print drum

    Comment

    • hatchclown

      #3
      Lever doesn't do the trick

      Thank you for the quick reply.

      I found the lever rather easily. I moved it over and pulled on the drum. It moves just a hair (just enough to go past where the lever locks the drum in place), but it won't pull out any further.

      Any other suggestions?

      Comment

      • djdan73
        Technician

        50+ Posts
        • Oct 2008
        • 64

        #4
        open the top of the machine and reach in to where you can see the drum and turn it by hand until u can remove the drum completely from the machine

        Comment

        • djdan73
          Technician

          50+ Posts
          • Oct 2008
          • 64

          #5
          oh yea by the way your gonna get ink on your hands and it may take a bit of force to get it to turn

          Comment

          • joelsa12
            Trusted Tech

            250+ Posts
            • Nov 2008
            • 261

            #6
            this is what happened. as a drum sits the ink underneath the mast seaps up and under the clamp on the drum. it the drys. the clamp on the drum does not open freely because the master material with the dry ink on. when you made a master the clamp was not down all the way when the drum started to rotate. this cause the clamp on the drum to be stuck in the disposal system. open the top stand by the exit end of the machine. look in the middle and locate the drum. rotate the drum towards the exit end of the machine. you will hear the clamp make a noise when it comes out. the magnet that holds it down will grab it. once this occurs you will be able to pull the drum out. clean the clamp on top of the drum and any other drums that you have or this will happen again. hope that the machine did not come out of time when this happened.

            Comment

            • djdan73
              Technician

              50+ Posts
              • Oct 2008
              • 64

              #7
              although if what joelsa stated above had happened you most likely would have gotten a t-1 code which is a main motor lock code. but i do agree with the above statement about the ink migrateing to the clamp plate assy through the master material

              Comment

              • 20gaugeO/U
                Senior Tech

                500+ Posts
                • Feb 2009
                • 552

                #8
                Do what Joelsa said but before getting started take out the disposal box (allow more light in) and grab a flashlight so you can see what's going on.
                Where the silver "clamp plate" is positioned right now (or stuck) will give more answers.

                The drum should not come out unless the silver "clamp plate" is at the 12 o'clock position. Pull it towards you to release from disposal hooks.

                If the clamp is not caught in the disposal hooks (hope they aren't broken otherwise it will happen more), then it is the pressure roller caught against the drum and it won't come out. Have to take the back cover off and disengage the HOOK that is in the lower middle section of the machine. Use a screwdriver to slide it off not your finger.

                OR

                The clamp motor assy is just stuck down on the silver "clamp plate" gear. When you get the drum out you can put a drop or two of oil on the gear that flips the clamp plate over. Sometimes they get gummed up or worn.

                GR3750Mar-95S-305400ledgerobsolete 05/2008Jun-02

                Comment

                • hatchclown

                  #9
                  Photos of the machine

                  I've tried rotating the drum, but can't get a grip anywhere on it. I'm attaching photos of what I see so you all can give it a look over and let me know what you think. I have no problem getting my hands dirty or busting a knuckle trying to get it fixed.

                  Photo 1

                  Photo 2

                  Photo 3

                  Photo 4

                  Comment

                  • joelsa12
                    Trusted Tech

                    250+ Posts
                    • Nov 2008
                    • 261

                    #10
                    Your clamp is locked down. and it is in the dispoal unit. The yelow clip toward the back of the machine. the next ting sticking out of the frame is the clamp. its job is to open and close the clamp on the drum. you will need this in the up position to start. you may have to take it off the back of the mahcine if you can not get it to pop up. the drum will not turn with this locked down.

                    Comment

                    • hatchclown

                      #11
                      I removed the clamp, but am still unable to move the drum. Attached are new photos.

                      Photo 5

                      Photo 6

                      Photo 7

                      Comment

                      • joelsa12
                        Trusted Tech

                        250+ Posts
                        • Nov 2008
                        • 261

                        #12
                        not the thing with the yellow clips on them. sorry i was not descriptive enough. the thing with the yellow clips is the upper disposal roller. the clamp solenoid will becoming out of the back of the machine around the middle in photo 6 it will be the thing dirrectly to the left of the blue wire sticking out of the back of the machine and engaged with the clamp on top of the drum.. this is in the down position and needs to go up. once that is up you should be able to rotate the drum a little to take the back side of the drum clamp out of the dispoal.

                        Comment

                        • hatchclown

                          #13
                          So far ...

                          Got the cylinder out. I'm still getting the T14 error message and the drum won't go back in. I didn't have this issue before I transported the machine to my office.

                          Comment

                          • joelsa12
                            Trusted Tech

                            250+ Posts
                            • Nov 2008
                            • 261

                            #14
                            i would bet it is the clamp solenoid on the back of the machine. for the T-14 hold the reset down for three seconds and if does not clear i would bet it is the safety sensor on the clamp solenoid. I call it that, but I do not even think that there is a solenoid on that one anyway there are only 4 screws that holds the hole clamp on the back of the machine. i would take it out and inspect it for broken parts. i have seen the gears mess up and also the sensor. how far will the drum go in the machine? well problem one the drum is out. now on to the rest of it. waiting around till the delviery man drops off some equipment so not much to do. if you can not get it I am up for a phone call/

                            Comment

                            • hatchclown

                              #15
                              What's stopping it is the little metal nub that supposed to go into the end of the cylinder. There is a little sensor (1" x 1") inside of where the clamp is. It has a corner broke off it, but there is not circuitry touching where the break is. I'm going to take the clamp off manually again and put it back on when I get the cylinder in there. I haven't tried holding down the reset for 3 seconds yet.

                              Comment

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