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manu

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  4. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted · Edited by manu

    Yes, I'm totally in love with my new SEQ V4+. Amazing work from everyone involved :love:.

    I'm very much looking forward to learning more details about the new extension you are working on. The SEQ V4+ Eurorack Modules are already on my list : )   

  5. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    I am very happy, that I was able to fix both issues. 

    Quote

    1. Left OLED display is not working properly

    A new display fixed the issue. An expensive soldering mistake, though I only soldered with 280 degrees Celsius but probably I touched the pin for too long..? 

    Quote

    2. LED matrix does not work anymore

    Maybe a cable got loose? [...]

     @latigid on was right! It was the cable, I ordered parts for a new one and it worked. Thank you so much @latigid on and @Hawkeye for your support. I will now assemble the unit and request a serial number within the next days. Jippppiiieee! 

    • Like 1

  6. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Hi Andy, 

    thank you for your fast response.

     

    19 minutes ago, latigid on said:

    1. Left OLED display is not working properly

    Does it mean that you removed the cables from the OLED end, and the known-good J15 port and cable also showed the same behaviour with the "right-hand" OLED? Normally I would expect that the cable had a missing connector or shorted cable. It might be worth building a brand-new cable if you have the connectors and ribbon handy. You can also check the Core module IC2 and resolder the pins.

    Do you notice any different behaviour if you just connect one OLED at a time? Also, how are you powering up? You might try a phone charger USB or hub with more power available.

    Thanks for the suggestions. So I tried to connect one OLED at a time and also to power the unit through a phone USB charger. Unfortunately no difference. The faulty physical display always had the same defective behaviour, regardless of all the described swapping. So probably I damaged that one display.

    19 minutes ago, latigid on said:

    2. LED matrix does not work anymore

    Maybe a cable got loose? There was one IDC8 connector that didn't fit well. Otherwise, I'm not sure what to suggest if everything else is running. Did you check with the correct _L/_R NGC and the correct SEQ HWCFG?

    Yes, that was my hope as well. I tried already 3 times to follow the steps again, from Peters video for testing the LED Matrix, but no success. Based on your suggestion on the previous page, I will try to set the pins directly to hopefully get some kind of a life sign. 

     

    Thank you for your time. 

  7. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted · Edited by manu

    Dear Peter, Andy, Adrian and Thorsten and all others involved in UCApps and Midiphy, 

    thank you for this amazing project. 

    I am almost done with the SeqV4+ and it was a great experience. I enjoyed the two instructional videos from Peter more than any TV show [great music by the way], the hardware design is fantastic and I can’t wait until I finally can use it in combination with the legendary software from T.K.. 
    Going through the building process made me very happy, so thank you for that. 

    Unfortunately I have still two problems before officially asking for my serial number ; )
    My knowledge of electronics is quite limited, so I am very thankful for any help. 

    I searched through this topic and related. So I hope, that I don't post problem descriptions, that already existing close by. 

    1. Left OLED display is not working properly

    I probably broke the display itself while soldering, but before spending the money on a new display, I wondered if anyone could spot an obvious mistake. 

    While powering SeqV4 the content is displayed fine

    Left_OLED_working_startup_animation.thum

      but then while running, the right half of the display stays completely "filled".

    Left_OLED_defective_while_running_small.

    The left half is otherwise working as expected.

    I checked: 

    1) On the core on J15_S the displays are jumpered to 3.3V and R33D on the core is 560R as suggested by Peter. 

    2) I swapped the display cables on the core (J15A/B). The defective display behaviour is unchanged.

    3) I swapped the cables from the working display and defective display. The defective display behaviour is unchanged.

    4) I checked the shielding against the capacitor as suggested by CJ55. It was already nicely shielded on the OLED PCB with a strip of extra tape. Thanks for that : )

    5) I double checked the soldering points on the OLED connector.

    I probably damaged the OLED while soldering, right? The only thing that makes me doubt is, that the display seems to work while powering up SeqV4. 


    2. LED matrix does not work anymore

    After I finished the Le-Mec boards I tested the LED Matrix through Midibox NG and CC16 and it worked fine. Now that I have assembled the PCBs into the case, the LED Matrix unfortunately does not work anymore. Neither with SEQV4 nor Midibox NG - no life sign. When I test the LED Matrix with a Multimeter as suggested by Peter in the video, on the top right pin and the 4th from the left pin, the corresponding LED lights up. What could be the next meaningful component to test?


    Thank you for your time. 

    Best Regards, 
    Manu

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