K8005 stepper motor card

Kits PC Related Projects
1

hi,

i recently buy assembly kit k8005, now i try to soldering it. My problem is, when i solder PCB i didnt paying attention, so i dont know if i do it right or not :frowning: , can someone be so kindly and look on to PCB board and verify me if contact of J7 and R10 are really connected, i will appriciate that.

thx in advance

regards

2

hi,

when i was puting together my 4-th k8005 card i test it, and doesent work, in quick checkup i noticed that i made a mistake with transistors, T11 and T12 was switched, i switch it on the right positione and test it again and still doesent work, how big damage i did with switching that two transistors?, can that damage be repaired.

Thanks for answers

regards

3

any hint please

regards

4

Most likely, transistors are defective, better to replace them.
There can be more than one problem, most likely assembly or solder problem.

5

thanks for reply.

i leave an open option for bad assemblyor soldering, but ill first replace transistors an post it here if it works or not

regards

6

i replace transistors and k8005 still doesent work, it seems something else is damaged also, i checked all diodes and work fine, im afraid that IC-s are damaged, any idea what else i can do?

regards

7

Can you link to HI-RES and SHARP pics of both component and solderside, so that we can take a look at your assembly.

8

pic are made with n95 5M pixels

shrani.si/f/2z/8H/1PQrBaXY/04042011106.jpg

shrani.si/f/1t/J0/1PJGvsRq/04042011107.jpg

shrani.si/f/I/jx/1XDrtzxK/04042011108.jpg

shrani.si/f/1y/gr/OgTWEnG/04042011109.jpg

shrani.si/f/2H/ho/xEhO4e1/04042011111.jpg

regards

9

i test both of transistors that was switchet (stickycarpet.com/pinx/test.html), it seems to transistors are OK, i allerady see that will be very dificult to find a error on pcb.

10

i today assembled another K8005 card, it works fine, si i put all IC-s on working card, card work fine, so IC-s arent damaged, im running out of ideas, i also replacet 7805 with new one (excatly same)?!

regards

p.s: when i press STEP button motor start to make a little noise, it doesent turn but if u hold it in hand u can fell that he want to turn but he dont

11

i replaced all 12 transistors, card still dont work?

regards