RZ 990 U - T96-569 Error Code

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  • samraisenz
    Technician
    • May 2024
    • 20

    #1

    [Error Code] RZ 990 U - T96-569 Error Code

    The issue is the T96-569 error code on my RZ990 U. And also on a friend's MZ790 U.

    Let me be clear — I have gone through the Drum Color Recode Process several times. The process I have done multiple times is as follows:
    1. ON —> TEST MODE
    2. TM Code 117
    3. Start / Stop
    4. TM Code 890
    5. Start / Stop
    6. OFF / ON —> TEST MODE
    7. TM Code 887 (inking action)

    And I still get the T96-569 error code.

    Some of my drums with this issue I’ve pieced apart and reassembled, and the error code still sticks. Has anyone managed to get rid of this error code successfully?

    I’m not sure if it’s a faulty sensor (in which case, it would be faulty in more than 1 drum).

    Any suggestions would be great, except for doing the Drum Color Recode process, which I have lost track of the number of times I’ve tried that. To the point where there is too much ink in the drum and then I had to piece it apart and remove some of the ink on the roller
  • jermyth
    Riso dude

    250+ Posts
    • Mar 2011
    • 435

    #2
    First are you using genuine RISO ink? If not start there.
    Second, and it may sound nit picky, but my procured for inking does not include the pressing of STOP after running 890, just turning off the machine. And since you've gotten the drum to inked up you can skip 887. But now that I think about it, you said you had to removed excess ink from running 887 repeatedly makes me think there is more wrong with the drum(s) because the machine shouldn't be inking up more if the ink sensor is working correctly and telling the machine it's got ink. Open up the drum and start checking connections and looking for broken/pinched wires. Check continuity to the drum connector. Also is the firmware up to date?
    And do you have a service manual so you are following correct procedures to work on the drum?

    Good luck!

    Comment

    • samraisenz
      Technician
      • May 2024
      • 20

      #3
      Thanks for the reply!
      • Yes, using genuine Riso Ink. Bought from Hallagans.
        • I know the Ink Tube is the correct FII ink type type. The RF-chips look intact and unblemished. I've bought another RF-Tag reader1 off eBay, swapped that in -- didn't change the T96-569 error.
        • I've also tried using the same drum with a new (genuine Riso) ink tube and tried the recode process again. Still didn't take -- T96-569 error.
          • Leads me to believe it isn't a tube, RF-chip, or RF-reader issue (but I could be mistaken).
        • I am 100% positive I am using the correct Drum Model for my machine. I've used them before in this machine, but they have stopped working. At one point, they were functional in this machine. I'm very confident it isn't a mismatch between the Tube <--> Drum <--> Machine.
      • Yep, I know in the procedures I don't necessarily require me to press STOP. Once the Test Mode codes run successfully, they'll automatically stop if they were successful. Then I just hit "reset" to clear the current code and return to the menu to type another code in.
      • Yep, I know if they already have ink in the drum I don't necessarily have to run the Inking Action, but I've (usually) done that to be consistent. Some of them have over-filled with ink and then I've had to piece the drum apart, scrape some, clean the ink sensor, piece it back together and try again. Some of the drums I've cleaned completely, and they will put some ink in the drum, but still kick the T96-569 error. I've had it happen in inked-up drums and drums I am freshly inking in an attempt to "start over from scratch" to see if I can get rid of it. I’ve also tried TM 951 to specifically assign a color code.
      • I've checked that all the connections are firm. I've also tried swapping out Ink Tube Housing Assemblies2 from drums that I know worked okay. Seems to have no effect. I have also tested the Ink Pump5 by connecting it to a .5v power adapter and touching red-to-red, black-to-black and the ink pump motor will spin ink in and then out appropriately.

      After some more thought/testing, this leads me to believe it might be 1 (or both) of 2 things wrong:

      Option 1:
      • It might be the Ink Sensor PCB3. I don't think this is necessarily the issue because (and correct me if I'm wrong) this sensor does not store the Ink Category/Type/Color information.
      Option 2
      • It might be the Drum PCB4, which appears significantly more challenging to replace. Since this PCB does store the Ink Category/Color type, and if the T96-569 error means "Data not Input" then whatever is storing this information might be faulty.


      Something I realized that I find very odd:
      • One of my drums (Cornflower Blue) was working for a while just fine. I had changed it from Metallic Gold --> Cornflower Blue. It worked fine as Metallic Gold. Pieced it apart, thouroughly cleaned it, pieced it back together and convered it to Cornflower Blue, and it did ink up and print for a while. And then, as Cornflower Blue (after being OK for a solid number of masters/prints, it threw the T96-569 error. I've tried running the Inking Action -- and i hear the motor activate for a very brief second, and then it stops and deactivates. Throws another error code (C01-512: No Ink/Replace Ink, the Ink Sensor Did Not Go On even when inking was performed for a preset duration). Maybe it is an Ink Sensor PCB? But that doesn’t store the Ink Color/Code Input Data that is causing the T96-569 error? I would prefer to pay $35 to get a new Ink Sensor PCB from eBay vs. trying to source a new Drum PCB. But from China it would take +2 months for the Ink Sensor to arrive.


      Do you know of a better Test Mode to try to see if the Drum PCB4​ is working?
      • I ran the Test Mode for the Ink Sensor3 (TM 809), but to the best of my knowledge it only tests if the needles are touching the ink -- not if they have the Ink Category/Information (ink level in Cornflower was too low so neither of the Ink Sensor needles were touching = no contact present).
      • If I can confirm the Drum PCB4 is working, I can rule that out. I guess right now I'm looking for more TM to narrow down which step in this chain is faulty Is it the (or some combination of):
        • the Ink Sensor3​ (i.e. Levels, i guess),
        • various connections in the Ink Tube Housing Assembly2​,
        • The RF-Chip/RF-Reader1​,
        • or the Drum PCB itself4​.
          • The Drum locks/unlock from the machine correctly, so I know there is a connection between the Drum and the RZ Unit itself.


      For Clarity (Parts Numbers from RZ 9 Parts List):
      RF-Tag reader1: Part Number 444-59002-208
      Ink Tube Housing Assemblies2: Part Number 023-75123-056
      Ink Sensor PCB3: Part Number 444-51004-104
      Drum PCB4: Part Number 024-17178-107
      Ink Pump5​: Part Number 023-17145-309

      ​​
      ​​
      ​​
      Last edited by samraisenz; 4 weeks ago.

      Comment

      • jermyth
        Riso dude

        250+ Posts
        • Mar 2011
        • 435

        #4
        After all that said and done, I'd go with the RF reader or the drum PCB. The drum PCB stores the ink information, so it's either lost the ability to store the information or the RF reader is not communicating with the drum PCB. Double check the wiring from the RF reader to the drum PCB is the only other thing I can think of. See if you can get yourself a service manual if you don't already have one. The wiring diagram shows everything in the drum goes though the drum board.

        And this is happening to multiple drums?? Maybe something on the Main board is not working correctly and taking out the drum boards. See about hitting it up with firmware won't hurt.

        Good luck!

        Comment

        • samraisenz
          Technician
          • May 2024
          • 20

          #5
          Whelp -- I've managed to repair both drums with the T96-569 Errors.

          Anyone finding this post down the road, do not reply to it. This is my recap to what I think was the problem, and what I believe solved it. A sort of summary if you will. But this post is now closed.

          Context:
          I had 3 drums causing issues. Two had the T96-569 errors. Another had a master wrapping error.
          - Cornflower Blue: T96-569
          - Melon: T96-569
          - Light Lime: A16-525 (master remains on print cylinder ... there was no master on it).
          Additional Context: Before having this RZ 990, I used to own an MZ790 which I sold to an acquaintance, but we swapped drums around for a minute. Since they were compatible with both units, it didn't matter.

          Now, I tried a variety of Test Modes and got a variety of Error Codes while trying to fix these drums. I believe the issues were different for each, but they might have come from the same original problem. My guess is that when I cleaned Cornflower Blue and Melon, and tried to re-code them, it was still reading the drums as for the MZ790 instead of the RZ990. So it kept saying "data not input: drum category, ink category, etc." and it couldn't get past that. I've heard that some people have run into this T96-569 error when trying to use a drum from another compatible unit but the "new" unit wouldn't recognize it. That's my guess how this happened but it's tough to know for certain. Here's the general tools I used to solve it:

          (the Light Lime Master Wrapping error was far simpler to solve: cleaning the light-absorbing pad on the mesh screen, making sure the Clamp Collars were in good working order).

          For Melon:
          - TM 9874: Access Protected Test Mode
          - TM 1210: to access drum code entry (my manual says 37 for ledger. I also read somewhere that the MZ790 uses 69. so I tried that too).
          - TM 1214: Drum Color Code Entry. 63 is any color. 0 is not specified

          Errors Following:
          Do2-532: Incorrect print drum
          C01-512: Ink Sensor Did Not Go On
          T24-539: Inking Motor FG did not act

          Next Test Modes:
          - Holding the "+" and "x" keys to enter Sales Test Mode (STM)
          - STM 110: Clear Error Status Data (<--I think this one was the important one)
          - STM 951: Drum Color Code Entry
          Regular Test Mode:
          - TM 112; Test Mode Data Clear
          - TM 111: User area memory clear
          - TM 117: Standard Test Mode Settings
          - TM 890: Copy Ink Code
          OFF/ON in TM
          - TM 887: Inking action

          if the inking action didn't work, run TM: 882 (Inking Motor ON action -- it's really important that the ink pump grabs a hold of the ink and creates the siphon from the tube through the distribution holes in the drum, otherwise the TM 887 Inking Action won't work, it will think there's an issue with the Ink, Ink Tube, Out of Ink, or something along those lines.).

          For Melon, basically after clearing the error data, resetting the Drum Entry Code, Print Drum Color Code, Ensuring Inking Motor was working, Inking action worked and it finally cleared!


          For Cornflower Blue:
          - This one was far trickier. The test modes above didn't work, and I kept on running into the T96-569 error code.
          - After running through the TM 110, 111, 112, I tried to run the Inking Action. It would just stall indefinitely so I'd have to restart in Test mode. Same thing when I tried TM 117 -- it would just ... freeze?
          - The Eureka moment was when I tried TM 882 -- the ink motor would lock. I could hear it attempt to run for maybe 1/2 a second, but it wouldn't turn and dispense ink. Now, I had tried the ink pump outside of the drum separately and it seemed to move ink okay. But I guess what was happening was that it was able draw power, but not enough power to the machine's liking. So I swapped in a spare, cleaned ink pump, plugged it in, put the drum body/mesh back in place. Sealed it up. Ran TM 882 again and it successfully pulled ink. Now, it kept giving me a T96-569 error until the drum had enough ink to trip the Ink Sensor (but NOT the OVERFLOW sensor).
          - So then I ran TM 117, 890. OFF/ON in TM. 887 AND BINGO! Fixed drum. I'm guessing the Ink Motor for this one was the primary culprit. It couldn't pull ink into the drum body, so it never was able to really "read" the ink. No Ink = No Ink Code = T96 Error Code.

          Anyway that's my guess for these. Fortunately with some clever test modes, error status clearing, and a spare Ink Pump -- I finally have all 3 of these drums working again.

          Thanks for playing. Hope this helps someone else down the road.

          Comment

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