niles

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About niles

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    MIDIbox Newbie
  1. Troubleshooting midiphy SEQ v4+

    Makes sense, I suppose it would want to go as fast as possible for quick registering. Is the RC = reset clock? Still not seeing any action on switches. I did for a little time right after I reflowed the ICs I mentioned but now nothing is showing up in MIOS.  I'll test all the pins again with the scope and report back and basically go back through your previous posts on this thread.  I still get perfect encoder twisting registering in MIOS studio, just no switches. 
  2. Troubleshooting midiphy SEQ v4+

    Initially I wasn't seeing anything on pin 14 on IC20, so I reflowed 17, 19, 20 pins and now I do see something. I do see normal (I think) behavior on IC2 now. I am curious what the CLK signal should be, though. You mentioned 1khz. I'm reading a little over 667khz on all clks, including the left le mec board. Thinking it was user error, I tried my function generator with a 10khz square wave the scope read it perfectly with no adjustments.  I am wondering if perhaps it's just getting clk'd too fast to really give reliable operations? What controls the frequency signal?
  3. Troubleshooting midiphy SEQ v4+

    I believe it is, what is the side of R26 connected to? I see the end closest to the pcb edge is to pin 8 of IC2. I thought I could test resistance between pin 8 and the mystery point just to be sure R26 is soldered on there correctly. Turns out there is no pulse train on Pin 14 on the R board. I see it clearly on the L board, it does help that one board works to compare! Do you think this IC2 is just a dud or perhaps damaged somehow? I get 0V on pin 13, also.
  4. Troubleshooting midiphy SEQ v4+

    With seq_r loaded,  on the Left board, on the scope I see a sequence on each of the output pins of IC2, although I can't seem to see any activity even if I press the switches. They just seem static although that could be my inexperience. I mean, the Left board switches still register in MIOS studio console so it's prob me :)  On the Right board however, each of the outputs of IC2 are reading high, no sequence. That would probably make sense that IC3 has all the high readings, then, right? If it depends on the outputs of IC2 being correct sequence? Both chips have clock in, it appears. Hopefully I'm still moving in a forward direction with this!
  5. Troubleshooting midiphy SEQ v4+

    Well for each button pressed it's the same each time. I get different groups of 4 registered in the debug screen on each encoder.  Now I can't get any of them to register, unfortunately, after a good cleaning.  Encoder twists still register great. COnfirmed I have seq_r.ngc loaded. I started comparing lemec L and R, and on IC1 on the L board, I don't see any voltage on pin 4 and 6, although I do on the R board. My L board is working fine (switches/encoders that is), should pin 4 and 6 read +5V as on the R board IC1?  IC1 is right next to the J89 connector on the Left board, so wasn't sure if maybe that is relevant to my problem.  I'll continue comparing the IC voltages via my scope but just curious which ones should be the same between L and R. All of them? Thank you
  6. Troubleshooting midiphy SEQ v4+

    pretty sure everything is correct, I can make another cable (third one...) and see if that makes a difference.  In the meantime here are photos.
  7. Troubleshooting midiphy SEQ v4+

    I get a similar output each time I press any of the encoders on the right lemec board, not just the ENSW8. I don't see anything touching, and I see the same behavior if I swap seq-plates from the left lemec board.  As for SW19, when I temporarily install all the switches in the lower row, each switch registers similar 'quadruple' output messages as the encoders. Same thing happens if I test SW1->16 as Peter shows in the video with a small, horseshoe shaped length of wire.   I reflowed some points and all the diodes, still no luck, unfortunately.  Given that it's happening to all switches, would there be a point somewhere that would affect all of them somehow?  Also I don't have the JA board connected past the right lemec so not sure if that is affecting things?
  8. Troubleshooting midiphy SEQ v4+

    @SimonSaysWow great job! I am getting there bit by bit myself. I am at the DIN switch test phase, I have the lemec boards plugged in and since I hosed my JA board I have the Left lemec plugged into the core and running seq_r instead. The left board is checking out good so far. The right lemec's encoders register normal when I twist them, but pressing them as a switch registers 4 events. All the switches on the right board register as 4 different switches, I assume the ones in their little matrix.  The bottom 4 (SW17, 18, 19,20) do not register at all.  Any idea what this could be? Sample output when I press ENSW8 on right lemec: [130673.482] 90 4b 7f   Chn# 1  Note On  D#4  Vel:127 [130673.495] 91 63 7f   Chn# 2  Note On  D#6  Vel:127 [130673.500] 90 63 7f   Chn# 1  Note On  D#6  Vel:127 [130673.515] 90 33 7f   Chn# 1  Note On  D#2  Vel:127 [130673.618] 91 63 00   Chn# 2  Note Off D#6 (optimized) [130673.622] 90 4b 00   Chn# 1  Note Off D#4 (optimized) [130673.636] 90 33 00   Chn# 1  Note Off D#2 (optimized) [130673.640] 90 63 00   Chn# 1  Note Off D#6 (optimized) Thanks
  9. Troubleshooting midiphy SEQ v4+

    Thanks!
  10. Troubleshooting midiphy SEQ v4+

    @latigid on Hi I'm at the point of testing the lemec boards, and if you recall I have some issues with the JA board. As you suggested earlier if the power is ok, at least some of the board should work.  I just want to make sure power is ok passing through the board, could you let me know what the voltages should be on the pins for SRIO out? Or point me to a link with it, I can't seem to find it via search.   Thank you! Nevermind I forgot I can use seq_r to just chain it the other way around. I'll figure out the JA board later. Thanks though
  11. Troubleshooting midiphy SEQ v4+

    That makes sense with _L vs _R chaining order...I'm going to give your suggestions a shot, the piano roll on midi channel 3 with seq_l.ngc loaded and the chaining test.  will report back once I have something.   And as always, thank you for the thorough reply!  
  12. Troubleshooting midiphy SEQ v4+

    Yes-I replaced RN1. When I say I hold my hand on the back I mean that it's just very sensitive to touch. It's not like that with the other switches, just sw2,7,9,11,12,13 - they all act like one switch, one led. The only ones that are working as intended are sw3,4,5,6. The rest are dead switch/dead led.  I usually solder THT components from the bottom out of habit. Attached a picture below of back. using MIOS studio as you suggested, I get some LEDs to light up. I can't follow which DOUT 1-7 and DOUT 10-15 correspond to which LED, it seems random. I tried reading the  http://ucapps.de/midibox_ng_manual_ngc.html  page about LEDs so I see that different combinations=different patterns, though unclear if that applies to this or the little matrix on the top of the board. Don't suppose there is a test script that would light up LEDs in sequence?   One question I have is how does the chaining work with J89 and J89A? I see I have to connect the Left Lemec board into J89A on the JA board, would I be able to test the lemec boards if I just plugged the left board directly into the J8/9 on the core board? I am not sure if they are a direct connection or somehow buffered/filtered through the JA board first. I ask this because I just want to move ahead at this point (and see what else I screw up lol) and some of the pins aren't connected between J89 and J89A, which could be normal or not.      
  13. Troubleshooting midiphy SEQ v4+

    Well I replaced all the ICs on the JA board and the problem is less but still there.  Now if I hold my finger on some of the pads on the back, the leds light up. I tried my other waveshare board and it's the same behavior. Attached a picture.  Maybe I just order a new PCB and the specialized parts. Fingers crossed I didn't damage the main uCore board   
  14. Troubleshooting midiphy SEQ v4+

    Ah ha - I must have just seen the '4816P' and so grabbed the bag with the wrong one. I installed the 1-103 in that location not the 2-103.  I'll make that switch, hopefully I can salvage the one from the board, looks like I need it later on. Thank you again, I'll give this a shot and report back.
  15. Troubleshooting midiphy SEQ v4+

    Quick followup on my SD Card not reading problem - Success! I was able to get the SD card to work :)  It was something with the core board. No idea what it could be and not spending anymore time fixing it. Just redid the boards using new PCBs. The MCU was fine after all so now I have an extra for future projects. However....- I hooked up the JA board and loaded 'seq_l' program successfully in MIOS studio. However the LEDs and button activations are going haywire. I realized with slight horror that I used an older cable that I had made that was basically backwards.  I have some extra HC595's from original mouser shipment and replaced the IC1 (directly under the SRIO IN shrouded header), but still getting the crazy led action. Good news is all the LEDs are lighting up and they are registering on MIOS studio, the encoder is as well. Bad news is they are just randomly flashing and activating on their own. Is there a schematic or pinout for this board so I know what I may damaged with incorrect cable? Could a bad cable have damaged the RN1, IC2 or IC3?  Thanks!