nairolf Posted November 12, 2017 Author Share Posted November 12, 2017 OOOh sorry I read wrong... Ithink you're talking about shield... but I have 2 other dicovery board... I 'll do the test... Btw I've got a multimeter with ohms Link to comment Share on other sites More sharing options...
Content Provider lucky1 Posted November 12, 2017 Content Provider Share Posted November 12, 2017 could you please measure from the following pins connections from the following list The numbering for the DMD connector is on the picture. Signal Name - Discovery Board PIN - DMD Connector Pin Latch - PA0 - PIN7 RowClock - PA1 - PIN5 RowData - PA2 - PIN3 OE - PA3 - PIN1 CLK - PA5 - PIN9 DATA -PA7 - PIN11 normally it should read 220 ohms Link to comment Share on other sites More sharing options...
Sibi Posted November 13, 2017 Share Posted November 13, 2017 Try with external power suply, take one from pc ore something like that for test. 5V on real pins are not filtrated nice, and caps are wery old. Try put multimeter on ac volts and mesure 5v. If you reed something else then 0.00 5v is not ok, to be sure you nead scope but this metod will work. Link to comment Share on other sites More sharing options...
Sibi Posted November 13, 2017 Share Posted November 13, 2017 Forget too ask you something. Did pin boot with dmd atached? As i remember sound board on de will make some sound when 5v is on, and there is test with leds on maind board. Did leds on main board make same blink with pin2dmd atached as they make with plasma display? Just to be surten thet ewerething is ok with pin. Link to comment Share on other sites More sharing options...
nairolf Posted November 13, 2017 Author Share Posted November 13, 2017 Thanks a lot for this new help... I'll check this evening... Link to comment Share on other sites More sharing options...
Rappelbox Posted November 13, 2017 Share Posted November 13, 2017 Please check the electrical connections between the red pins and in a second step between the blue pins. You should have a direct connection on all blue pins and on the red pins either direct connection or ~220Ohms resistance. Your wiring on your picture (with the blue cable) is NOT correct, therefore it will not work! That worked only on a small batch of my V3 shields which have been replaced or fixed some months ago. Remaining shields were destroyed and not used any more. A suggestion i can make is that either the ls123 is defective, or a missing ground connection between shield and display driver board. If possible please try the pin2dmd with an other machine (preferably Bally/Williams, but others will do as well) and check if it will work. Kind regards, Dom Link to comment Share on other sites More sharing options...
nairolf Posted November 13, 2017 Author Share Posted November 13, 2017 Hi Dom, Thanks, I'll remove the blue cable... I've test the 3 shield I bought to you with the same problem so I think it's not the LS123 (or all are defective). Does I need to remove the bridge in LS123 also? I'll make all test this evening. Link to comment Share on other sites More sharing options...
Rappelbox Posted November 13, 2017 Share Posted November 13, 2017 If you use the bridge from red(5) to blue(1) you should have a connection straight from red(1) to blue(4) with around 220Ohms resistance. please also check the other connections like lucky1 suggested above. Link to comment Share on other sites More sharing options...
nairolf Posted November 13, 2017 Author Share Posted November 13, 2017 OK, I've made all test, remove blue cable I've added, remove the bridge I add and... Now it's working... With Dom help, I've found the problem. All pins on 2 and 3 in red section was not solder (only first pin in each black coposant - sorry I don't know the name). I've check on the other card and each one have not be solder on this area... So since to Dom I've found the problem but... Dom why don't you have solder correctly this part??? BTW, I'm so please that my pin2DMD is working that I'm just dancing in my living room for the rest of the night. Thanks all for your great help Link to comment Share on other sites More sharing options...
Rappelbox Posted November 13, 2017 Share Posted November 13, 2017 Happy I could help but a bit ashamed that it has not been soldered... Link to comment Share on other sites More sharing options...
Content Provider lucky1 Posted November 13, 2017 Content Provider Share Posted November 13, 2017 Strange ! From this picture I can´t see a bad solder connection. But glad it is working now On 12.11.2017 at 3:01 PM, nairolf said: Link to comment Share on other sites More sharing options...
nairolf Posted November 13, 2017 Author Share Posted November 13, 2017 Yes, I have done it on this card yesterday but on the same way I 've installed the blue cable that creat the default. I put a picture on the other to show you how they are.. I've make a mistake by doing 2 changes in the same time. I forget to mention it yesterday. Since to Dom last picture I understand that the problem could be only on this solder and only remove the cable and bridge. Link to comment Share on other sites More sharing options...
Content Provider lucky1 Posted November 14, 2017 Content Provider Share Posted November 14, 2017 OK ! That looks like a very cold solder joint. Link to comment Share on other sites More sharing options...
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