defred

salut a tous, ben ouais j'ai tous monté soudé les affaires et j'ai beau me débattre j'ai quand même des tonnes de messages midi parasite quand je connecte des potards soi sur l'AIN qoit direct sur le core ! A une exception près, si je ne branche que les faders "plastoc" que j'ai sur la boite y'a aucuns problemes. Voilà j'en suis là , j'ai déjà fait pas mal de test, tout est a la masse comme il faut (ma boite est tout metal), essayer de voir si l'alim merdais pas en contact avec la boite, isoler chaque potards de la boite (bien relou pour rien), bref pour l'instant je pense accuser les potards que j'ai acheté même si ils ont un belle gueule (metallique). Des idées, des théories, des conseils je suis preneur ! le topic en anglais : http://www.midibox.org/cgi-bin/yabb/YaBB.cgi?board=troubleshooting;action=display;num=1073512427 merci d'avance, a plus defred

Okay, now I'm desperate ! All day I patiently isolate all pots, now the metal enclosure of the pots are no longer in contact with the front plate, rather a boring activity. That didn't pay. Always the same, controllers events appears randomly. So I again tried to bypass the AIN and connect directly pots on the core, erratic stuff again except when I connect the "plastic" faders that works great with no odd events coming out. Even when tapping/shaking the box nothing weird. So now I think the problem comes from the pots I have, even if they look good, I think they're are not. Could it be possible my troubles comes from non-adapted potis ? Sound strange... but tests are here, the faders which are basicaly the same than potis works great ??? So I've check the links on reichelt to the pots recommended by master TK, and they do look different with plastic axis and body, but since I isolated mine the difference must be elsewhere... I don't get it, anyone experienced buying 30 pots that didn't work with the mbox projects ? :-/ Again much thanks for your help past or future ! Smash : sorry I didn't saw your question, the boards where bought at mike's pcb looks like it has a ground plane. Steven : I've checked your "same trouble topic" on the forum, learned great stuff, but the isolate solution do not work for me. defred

Okay, now I'm desperate ! All day I patiently isolate all pots, now the metal enclosure of the pots are no longer in contact with the front plate, rather a boring activity. That didn't pay. Always the same, controllers events appears randomly. So I again tried to bypass the AIN and connect directly pots on the core, erratic stuff again except when I connect the "plastic" faders that works great with no odd events coming out. Even when tapping/shaking the box nothing weird. So now I think the problem comes from the pots I have, even if they look good, I think they're are not. Could it be possible my troubles comes from non-adapted potis ? Sound strange... but tests are here, the faders which are basicaly the same than potis works great ??? So I've check the links on reichelt to the pots recommended by master TK, and they do look different with plastic axis and body, but since I isolated mine the difference must be elsewhere... I don't get it, anyone experienced buying 30 pots that didn't work with the mbox projects ? :-/ Again much thanks for your help past or future ! Smash : sorry I didn't saw your question, the boards where bought at mike's pcb looks like it has a ground plane. Steven : I've checked your "same trouble topic" on the forum, learned great stuff, but the isolate solution do not work for me. defred

okay thanks for the hints, I'll browse the forum once again, I'll try isolate the pots, anyway thanks all, I'm currently taking a break !!! cheers ! defred

okay thanks for the hints, I'll browse the forum once again, I'll try isolate the pots, anyway thanks all, I'm currently taking a break !!! cheers ! defred

cypress

Fu....in' metal box ! My problem is still here : a flow of midi events coming from the box. So still in the grounding problem idea, I try to connect only 4 faders (which obviously have no contact with the case), and grounded what I needed to, guess ? No random stuff and the four faders working allright. Ok. So do the fact that my potis are metal cased AND in direct contact with my metal box can be the bug ? And if it is how do I isolate these potis, knowing that they're are metallic from the front screw to the back cover of it (contact can be done with the chassis screw, the axis passing thru the box thickness, and behind where the little case is directly in contact with it) ? Metal : never again ! >:( thanks for confirmation, hints, or more expert explainations. defred

Fu....in' metal box ! My problem is still here : a flow of midi events coming from the box. So still in the grounding problem idea, I try to connect only 4 faders (which obviously have no contact with the case), and grounded what I needed to, guess ? No random stuff and the four faders working allright. Ok. So do the fact that my potis are metal cased AND in direct contact with my metal box can be the bug ? And if it is how do I isolate these potis, knowing that they're are metallic from the front screw to the back cover of it (contact can be done with the chassis screw, the axis passing thru the box thickness, and behind where the little case is directly in contact with it) ? Metal : never again ! >:( thanks for confirmation, hints, or more expert explainations. defred

AC / DC it just DOn't RocK !!!! It is the very same problem so it might come from the AIN board, I'm so tired of verifying it, I guess I will do it again and again, I take a short break an get back on it ! defred, random data flow on midi ox were used to make Matrix Sfx :)

AC / DC it just DOn't RocK !!!! It is the very same problem so it might come from the AIN board, I'm so tired of verifying it, I guess I will do it again and again, I take a short break an get back on it ! defred, random data flow on midi ox were used to make Matrix Sfx :)

Here by in france its more like 220VAC, 50hz ;) the adapter says 220V 50mA --> 10V 300mA I meant the box one, to isolate the case from the power supply. OK Looks good to me, I do the test. thanks again, hope this will be it !!! defred

Here by in france its more like 220VAC, 50hz ;) the adapter says 220V 50mA --> 10V 300mA I meant the box one, to isolate the case from the power supply. OK Looks good to me, I do the test. thanks again, hope this will be it !!! defred

Well, as see nothing new to try in DC, I found a wall adapter that says it outputs 10V AC 300mA so bought it (cheap), in fact it reads 11,5 V with my multimeter, so do you think I can try the AC version with this adapter, or will I kill the whole box with that ? Also bought an isolated power plug... defred

Well, as see nothing new to try in DC, I found a wall adapter that says it outputs 10V AC 300mA so bought it (cheap), in fact it reads 11,5 V with my multimeter, so do you think I can try the AC version with this adapter, or will I kill the whole box with that ? Also bought an isolated power plug... defred

Okay thanks for the advice, I don't know how hard it is to find these AC adapters here in France (yeah froggie boy I am), but in case the rest of the research failed I'll try that (my core is fully stuffed so I can try, only have to change the case powerplug). I keep fighting ... defrd

Okay thanks for the advice, I don't know how hard it is to find these AC adapters here in France (yeah froggie boy I am), but in case the rest of the research failed I'll try that (my core is fully stuffed so I can try, only have to change the case powerplug). I keep fighting ... defrd

MAde the "air-power supply" test already, same problem. Checking the case grounding is ok, no tension, 0 ohm resistance. Grrr.... still no luck to see it work... i'll re check the whole stuff, it's third day of investigation (I'm like 24 hours on it) Anyway thanks you all for answers and leads. defred, not yet desperate :-/

MAde the "air-power supply" test already, same problem. Checking the case grounding is ok, no tension, 0 ohm resistance. Grrr.... still no luck to see it work... i'll re check the whole stuff, it's third day of investigation (I'm like 24 hours on it) Anyway thanks you all for answers and leads. defred, not yet desperate :-/

AAAAAARRRRRRRghhhhh new step, I found that when AIN and Core are connected but not the pots powersuply I can stop the data flow with my finger touching the case ! If the pots power supply is connected, no way to stop the data flow. If its not a ground problem I'll be damn, so I noticed that my power plug on the metal case, is made of metal also, could it be bad for grounding respect because one end of the power plug is in contact with the case ? Everything look real fine on the two boards (will not guarantee but checked it very well). What do you mean seperately from the box ? wiring my front plate with what ? thanks to anyone finally get me on the lead !!! defred

AAAAAARRRRRRRghhhhh new step, I found that when AIN and Core are connected but not the pots powersuply I can stop the data flow with my finger touching the case ! If the pots power supply is connected, no way to stop the data flow. If its not a ground problem I'll be damn, so I noticed that my power plug on the metal case, is made of metal also, could it be bad for grounding respect because one end of the power plug is in contact with the case ? Everything look real fine on the two boards (will not guarantee but checked it very well). What do you mean seperately from the box ? wiring my front plate with what ? thanks to anyone finally get me on the lead !!! defred

So my case is whole metal and I've already grounded it. My powersupply is a wall adapter set to 9V, the voltages I read on the Core test are all right 5V. Measured tension on AIN power pins is 4,5V is that enough ? It looks like its the AIN module that is faulty, I'm gonna check it with care today, but it all looks ok. For info my problem changed from random timed events, to continuous random controller flow. I have read the whole troubleshooting section of the forum with  no luck, but it looks like it's often soldering issues, so I'll check that. By the way the multiplexer I have are philipps HEF4051BP is there a special issue on this ? Is there a way to test them in case I fried one ? Can the problem still be on the Core even if when I don't connect the AIN (and ground what needed to) there's no probs ? defred

So my case is whole metal and I've already grounded it. My powersupply is a wall adapter set to 9V, the voltages I read on the Core test are all right 5V. Measured tension on AIN power pins is 4,5V is that enough ? It looks like its the AIN module that is faulty, I'm gonna check it with care today, but it all looks ok. For info my problem changed from random timed events, to continuous random controller flow. I have read the whole troubleshooting section of the forum with  no luck, but it looks like it's often soldering issues, so I'll check that. By the way the multiplexer I have are philipps HEF4051BP is there a special issue on this ? Is there a way to test them in case I fried one ? Can the problem still be on the Core even if when I don't connect the AIN (and ground what needed to) there's no probs ? defred

Well, fixed some bad soldering, try the core alone with everything needed grounded, no weird data, core+DIN no problems, core+AIN bad. So I focused on the AIN and re-done the whole power wiring of the pot with more accurate connexions. Problem is worst ! it really looks like a ground problem but no way to get rid of it. any idea welcome ! defred

Well, fixed some bad soldering, try the core alone with everything needed grounded, no weird data, core+DIN no problems, core+AIN bad. So I focused on the AIN and re-done the whole power wiring of the pot with more accurate connexions. Problem is worst ! it really looks like a ground problem but no way to get rid of it. any idea welcome ! defred

An additional question : When connecting the core alone (no AIN, no DIN connected to it) there should be no MIDI message from the box right ? Is there a special problem of having the power plug near the midi plugs ? still checking... thanks all. defrd