ALCOLOIC Posted November 3, 2007 Report Share Posted November 3, 2007 hi everybody i just finished my midibox sid (4sid) with complete control surface and everything is working normally .the only problem i have is that it freeze on startup when the din modules are connected ( the lcd show a black row on the upper part )if i disconnect/reconnect the din modules everythying work normally .i soldered all the resistor and the unused chips are not stuffed on the last din .if someone has an idea of what's wrong that would make my day thanks in advanceps: it's a v1 midibox sid Quote Link to comment Share on other sites More sharing options...
midiboxxer Posted November 3, 2007 Report Share Posted November 3, 2007 Hi,and welcome. What kind of psu do you use? Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 3, 2007 Author Report Share Posted November 3, 2007 hi thanks for the quick answeri use the c64 optimized psu http://www.ucapps.de/mbhp/mbhp_4xsid_c64_psu_optimized.pdf Quote Link to comment Share on other sites More sharing options...
midiboxxer Posted November 3, 2007 Report Share Posted November 3, 2007 Please check the voltages at the first core when the problem appears.C1:MCLR(1) - IC1:Vss(12) = 5V ?IC1:Vdd(11) - IC1:Vss(12) = 5V ?IC1:Vdd(32) - IC1:Vss(31) = 5V ?Make sure that Sc on J10 coreboard is not connect to the sidboard. (only core with controlsurface)Please check the value of R1 (coreboard).Greetings Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 3, 2007 Author Report Share Posted November 3, 2007 C1:MCLR(1) - IC1:Vss(12) = 0,9v ??? c1 is the capacitor right ? what is MCLR ?IC1:Vdd(11) - IC1:Vss(12) = 4,6vIC1:Vdd(32) - IC1:Vss(31) = 4,6vsc-j10 is not connected r1 is 100 ohmthanks a lot for helping Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 3, 2007 Author Report Share Posted November 3, 2007 i have no idea why but it's working normally now !!! Quote Link to comment Share on other sites More sharing options...
midiboxxer Posted November 3, 2007 Report Share Posted November 3, 2007 Sorry, my fault.It should be IC1 MCLR is on pin1 of the pic. If it works now, you can check if there´re any loosely cabels (bad connections). Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 3, 2007 Author Report Share Posted November 3, 2007 thanks for helping midiboxxer !i resoldered a few cables on the power supply i made months ago and it worked perfectly .now i only have to make holes in the enclosure ( a c64 box ) for the plugs and my sidbox is finished .but it's alive already ! Quote Link to comment Share on other sites More sharing options...
midiboxxer Posted November 4, 2007 Report Share Posted November 4, 2007 Congratulations, hope you post some pictures of your finished box. ::)Best RegardsMarkus Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 4, 2007 Author Report Share Posted November 4, 2007 that sucks i have that problem again !everytime i power the unit up the lcd show a blackrow .but if i disconnect/reconnect the din or dout my midibox boot normallyC1:MCLR(1) - IC1:Vss(12) = 4,6v IC1:Vdd(11) - IC1:Vss(12) = 4,6vIC1:Vdd(32) - IC1:Vss(31) = 4,6v Quote Link to comment Share on other sites More sharing options...
TK. Posted November 4, 2007 Report Share Posted November 4, 2007 Your PSU is not strong enough, this causes the issue.During Power-On, the PIC requires most of the power. For these 1..2 seconds the voltage probably sinks below 4.6V, and unexpected things will happen - or nothing will happen...I would propose to try it without LCD backlight first, and maybe only with a single PIC (remove the slave PICs from the sockets) just to check if my assumption is correct.Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 4, 2007 Author Report Share Posted November 4, 2007 i tried without backlight and without the slave core modules but i had the same result.i'm using the c64 psu with http://www.ucapps.de/mbhp/mbhp_4xsid_c64_psu_optimized.pdfi checked all the soldering and it looks clean thanks for helping Quote Link to comment Share on other sites More sharing options...
midiboxxer Posted November 5, 2007 Report Share Posted November 5, 2007 Have you the possibility to messure the current of your midibox with an multimeter? Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 5, 2007 Author Report Share Posted November 5, 2007 hi i'm not sure i understand the question .i allready mesured the current on the core ic1 like you told me and i had C1:MCLR(1) - IC1:Vss(12) = 4,6v IC1:Vdd(11) - IC1:Vss(12) = 4,6vIC1:Vdd(32) - IC1:Vss(31) = 4,6vwhere am i suppose to mesure the current now ? Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 6, 2007 Author Report Share Posted November 6, 2007 nobody ever had the same problem ? Quote Link to comment Share on other sites More sharing options...
TK. Posted November 6, 2007 Report Share Posted November 6, 2007 Here some infos about measuring current: http://www.hobby-electronics.info/course/html/ch02s05.htmlIt helps you to determine, which part or module consumes most of the current. E.g., for a single core module w/o LCD backlight and without DIN/DOUT module I would expect a current drain of about 50 mA, with backlight maybe 150..200 mA - this can be measured at port J2 (if you are using the optimized PSU circuit) or at J1 (if you supply the core module on the common way). You need to disconnect one cable (use the +5V line), and insert the multimeter there as a "bridge".By connecting the DIN module, the current drain shouldn't increase - if it increases, it indicates that there is a short somewhere around the 74HC165. This can be visually checked at the bottom of the PCB (search for soldering clumps, etc.)Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 11, 2007 Author Report Share Posted November 11, 2007 i tried to do what you said but i get a static 21 ma wich make me think i'm doin it wrong .what do you mean by "bridge" ?this is very frustrating i have a fully working sidbox that crash on startup .thanks for helping Quote Link to comment Share on other sites More sharing options...
nILS Posted November 11, 2007 Report Share Posted November 11, 2007 crashes on startup != fully working :DI had the problem with the DINs once. I had plugged the cable from the core to the DIN in the wrong way around... I'm pretty sure you checked that already though... Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 11, 2007 Author Report Share Posted November 11, 2007 it's fully working when i disconect/reconect the dins or dout .sometime it boot normally after i made a "shortcut" with my finger .if i don't solve the problem i'm gonna add a switch but i hate to solve a prblem this way Quote Link to comment Share on other sites More sharing options...
stryd_one Posted November 12, 2007 Report Share Posted November 12, 2007 it's fully working when i disconect/reconect the dins or dout .As TK said, if connecting the DIN modules increases the drawn current, then there is a short somewhere.sometime it boot normally after i made a "shortcut" with my finger .Where?if i don't solve the problem i'm gonna add a switch but i hate to solve a prblem this way No, don't do that :) Quote Link to comment Share on other sites More sharing options...
stryd_one Posted November 12, 2007 Report Share Posted November 12, 2007 i tried to do what you said but i get a static 21 ma wich make me think i'm doin it wrong .Or maybe something is connected wrong. Bridging it just means like this:Wire ------------------------------------------------------------- | | Meter | |Wire ------------------------------------------------------------- Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 12, 2007 Author Report Share Posted November 12, 2007 thanks i think i understand better nowi retried but the results seems weird with everything connected (4cores+lcd+complete control surface) i get 0,33with everything connected except the dout modules i get 0,07with everything connected except the dinmodules i get 0,07with everything connected except the LCD i get 0,14sometime it boot normally after i made a "shortcut" with my finger .Where?the j1 connector on the first dout module Quote Link to comment Share on other sites More sharing options...
midiboxxer Posted November 13, 2007 Report Share Posted November 13, 2007 Can you post pictures of the first dout module (both sides)? Quote Link to comment Share on other sites More sharing options...
ALCOLOIC Posted November 13, 2007 Author Report Share Posted November 13, 2007 i tried but i can't make a decent picture with my crappy camera .i'll try to borrow one .i rechecked the module and resoldered everything on it but without succes Quote Link to comment Share on other sites More sharing options...
SounDuke Posted November 16, 2007 Report Share Posted November 16, 2007 Ahoyhoy Alcoloic! I had your same problem yesterday as soon I stuffed my panel with the lcd. the lcd had a different ground respect to the rest of the midibox, I'm 70% sure your problem lies in incorrect grounding, I solved the issue by connecting the din/dout chain ground to the chassis, so that the lcd and the DIN/DOUT had the same ground. check it! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.