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About otropom

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    MIDIbox Newbie
  1. midiphy SEQ v4+

    I'm using these mec Switches/caps also, you dont need to modify anything . Simply use standard leds (3.3v) and you're good.
  2. midiphy SEQ v4+

    It just misses a huge and ostensible "MIDIbox SEQ v4 +" at the back on the white part to assert the whole ;) Actually i work at a french adhésive Brandt (GT-Stickers) that make premium adhésives, keep me on Touch if you want, we Can Do that on measure :)
  3. Troubleshooting midiphy SEQ v4+

    everything is running great now, you were right about IC2 cold joint. I just have the matrix that display "mirrored" text can it come from a backward cable or something like that. ? in any case merci beaucoup for your kindness and your advices, i will finally be able to enjoy the midibox seq ! and it wasn't that easy for noob (second diy project) that was not comfortable with English  language :) learnt lot of things !
  4. Troubleshooting midiphy SEQ v4+

    Well, after repairing IC2 pin 16, (i suppose my problem came from pin/pad misalignement) i installed New câbles for each screen and protect the bottom of both oled connectors with adhesive tape, it worked !  With one problem, however, as you will see on the picture.  I tested each screen independently / on each port without any change and it appears that the problem probably comes from the core, any idea if it can still be IC2 or some other element? (So close from the end!) Thanks 
  5. IMG_0014.jpg

    Excellent job :)
  6. Troubleshooting midiphy SEQ v4+

    Just followed every of your recommandations. Checked R33 abcd : 3.2v on all you will find attached also the values that i have on both display ports pins and on the oled itself. after reworking on ic2 a saw a problem with the pin that was in front of C2 (solder did not stick) so in doubt i unsoldered IC2 and the pin was simply missing :/ . Do you think its the origin of oled problems ? also can i bridge directly the pin to C2 or i must bridge from somewhere else ? thanks !    
  7. Troubleshooting midiphy SEQ v4+

    Hi there Everythig is done and before assembling the sequencer, I wanted to test all the functions (always with midibox ng and seq_l/r). R.A.S (good news) except for the screens that don't work. At the second boot I had the right screen (nothing on the left one) which displayed 88888...over its entire surface and at the next boot, nothing, the same for both screens. I test this way (core->JA board->lemec1->lemec2 + both screens) - I checked that J15S is set to 3.3V, -Rework each core weld (in case...) - Checked the voltages, I have the same results as on these images (posted by "SimonSays"): http://midibox.org/forums/uploads/monthly_2019_05/IMG_0137.jpg.7a321f39f767fe44ff31e9f676c01c8a.jpg http://midibox.org/forums/uploads/monthly_2019_05/IMG_0788.jpg.a5e22618fcb98c9437a10976bc2d058c.jpg -tested the lcd command... no idea what to do at this stage;( thanks for any help !
  8. Troubleshooting midiphy SEQ v4+

    Hi there, not sure on how to proceed but i would like to have a blue /white scheme for the beat led. am i correct if go A->1k res->3 (blue) and B->4.7k res->1,2,3 or i should do fro B : B->4.7k res->1 B->4.7k res->2 B->4.7k res->3   thanks :)
  9. Troubleshooting midiphy SEQ v4+

    i was finishing all the test then.....I can thank the all mighty god of randomness, i switched one of the lemec board cable with the core one then everything was......working  i have pretty luck after unsoldering twice the IC's that i didnt kill anything finally . I was far too confident with my cables, will check them twice for sure now ! i'm out of cable headers but finally the beast should be alive very soon
  10. Troubleshooting midiphy SEQ v4+

    Double checked but yes, MB_NG is flashed (MIOS detect MIDIbox NG on midi IN/OUT) and i tested both seq_l and seq_r (with seq_r, all ja board leds are lighting up, what the exact diffrences of r & l config files, simply for left/right version ?) . Actually JA Board seems to works perfectly, i have correct feedback within MIOS console (push btns / alp push action / knob) and leds are working correctly when i test buttons. With MEC boards its another story and only knobs turning are sending feeback to MIOS (tested with both seq_l / r).ngc) here the screenshot of what i get in the console. for info between each knob test i'm pushing them (no action triggered in console as you can see), same for mec switches and the matrix on CC16 (chn 1), not working . No succes with "set dout" function either unfortunally (dunno if its possible to test ic with a multimeter ?).   So for you , only IC2/3 (on both MEC boards) need to be changed or its better to replace all IC's ? for now its only my second diy project (first one was a xoxbox few years ago), i didnt had ocassion to stock spare parts but for sure i'm going to order enough "in case of"  :)   Thanks  
  11. Troubleshooting midiphy SEQ v4+

    Okay, so I just checked the cables: no problem, obviously. I also unsoldered / soldered back ic2 and ic3 together without success. The problem is 100% identical on both lemec pcb. Under MIOS, when I turn the knobs, I have a correct return of the values from both boards with the debug mode enabled, but no action is triggered when I press one of the buttons (alp push or lemec switches). Out of curiosity, I tested the pcb lemec (the smallest) by completely removing IC3 and the problem is the same, maybe that can confirm that IC3 is dead ? In your opinion, does this mean that certainty both IC3s are dead (because of the inversion?) and does the problem with the matrix also correspond to these ICs? I am waiting for your answer and I will order some spare parts. Have a good day and thanks :)
  12. Troubleshooting midiphy SEQ v4+

    These are the same ICs, I unsoldered them with hot air and soldered them back with iron (my paste is poping !). I'll apply your advices in the evening and I'll give you a feedback:) With Mios I have a normal feedback by turning all the knobs but nothing from pushing them, same with mec switches on both pcb.  
  13. Troubleshooting midiphy SEQ v4+

    Thanks for your fast answer latigid :) , yes it's the core I was talking about but you have the eye and after welding in the right direction ic2 and ic4 (on both pcb) everything was working and I was finally able to do the test. In this case, the encoders work perfectly but their push action doesn't work, its the same for the mec switches and the matrix (i was on the correct cc/channel). Do you have any idea what I need to check ? pretty hard to debug when you are a noob i admit. thanks by advance
  14. Troubleshooting midiphy SEQ v4+

    Hello, everyone, I am nearing the end of the assembly of my midibox but I admit to be stuck at the second test (32. LeMEC: Testing DIN Switch Function). With the Lemec card connected, the kernel does not boot at all (no activity leds etc...), I also noticed that IC5 becomes burning hot in few seconds. I proceeded by elimination by checking the welds / cables and testing without the top card without success. I cross my fingers to get some help, thanks in advance!
  15. Troubleshooting midiphy SEQ v4+

    my issue is solved, i simply forget to solder R33A on the core pcb , everything is perfect now,