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Janis1279 last won the day on October 29 2016

Janis1279 had the most liked content!

About Janis1279

  • Birthday 09/23/1966

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    Riga, Latvia

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MIDIbox Tweaker

MIDIbox Tweaker (3/4)



  1. Hi, Are you compared the both LCD screens pinouts in the corresponding data sheets? It's possibly are different. Regards, Janis
  2. Hi, MIDIbox FM Demo Samples part included some non working links. one of it (Schematic from Rick Jansen) is possible to restore with the updated link https://janswaal.home.xs4all.nl/Emusic/Moog/, I think. Regards, Janis
  3. Hi, - I do not know how you are planning to organize cooling inside yours MB-6582 case. When you are using a single 12V power supply you will get a lot of heat from a +5V linear stabilizer ic inside the SID synth case. - Some about feedback pots from one of Hawkeye messages: "1. 100kohm work fine, 500kohm will also work... the value just specifies the max feedback "dampening" which is at maximum for 100kohms already. 2. you need four "stereo" feedback potentiometers for four stereo pairs of SIDs, no matter what type of sids." or otherwise you don't forget to grounded an analog inputs. Regards, Janis
  4. Hi, as you see it's some info from Wibas mb6582 building files. At first you can print it for the better understanding for the matrix structure, I think. http://wiki.midibox.org/lib/exe/fetch.php?media=mb-6582:mb-6582_cs_dout_wiring.pdf http://wiki.midibox.org/lib/exe/fetch.php?media=mb-6582:mb-6582_cs_din_wiring.pdf When I built my MB sid custom CS, it helps a lot. Regards, Janis
  5. May be you can check all signal diodes 1N4148 are right polarity oriented .
  6. Hi, Here is a default encoder assignments for MB6582: http://www.midibox.org/dokuwiki/doku.php?id=default_encoder_assignments On the shift registers appropriate pins you can check pulses, when you slowly turn encoders knob. ps. some encoders have a different pinout, if yours are from another manufacturer. "Patience is a virtue" Regards, Janis
  7. Hi, The resistor networks are possible simply measure with the multimeter. If it not proper pinout , you are able to solder ones very fast from the separate resistors. Regards, Janis
  8. Hi, May be you need to recheck the soldering again, not for bridges only. The Led's and buttons are controlled by shift registers. To check all the ic's for right direction installed, for no broken ic pins and for it are in the sockets in right places. Regards, Janis
  9. Hi, The simplest way is to check interesting connection points on the pcbs with the multimeter with a beeper. Thenafter with the power on to check all voltages on the supply rails on the pcbs. Regards, Janis
  10. Hi, May be the 9vac wallwart is too weak. The Sids are eating a lot . Which Sids and how many are installed ? Regards, Janis
  11. hi, The DINX4 and DOUTX4 modules are always connected to the Core module ports. On the complete MB6852 base board these chips are located near long connectors row at the edge of board. Regards Janis
  12. Hi, In the wiki pages you can read some more control surface troubleshooting info http://wiki.midibox.org/doku.php?id=control_surface_troubleshooting&s[]=mb6582 The standard control surface has a PLAY button and it will be useful in farthest tests, with uploaded patches. For that the JD5 and JD8 slots are with the i-cs, of course. Good luck! Janis
  13. Hi, Thorsten, many Thanks! Let's think forth. Best Regards, Janis
  14. Hi, With the Pic based core tested midi in with some keyboard keys: Keyboard keys originaly are grounded , tried to make logical OR, diode is signal diode, as 1N4148. An idea using the optocouplers is from Doepfer the Solina midification pdf example. With the 60 keys will be 60 gates signals, it's paraphonic musical instrument.
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