Soldering mini-din wires directly to PCB

Thread Starter

Teo Molteni

Joined Nov 4, 2015
5
Hi there everybody! i'm new here and i was hoping to find some help with a soldering-wires problem i'm having. i was trying to repair a stereo 2.1 set by creative called inspire a200 (http://support.you.gr/catalog/17/17E450C2EC2AEA45A353BCD52E4758ED.pdf) because the mini-din9 female port got screwed by accident. the first thing i did was to unsolder the screwed port from the pcb to solder a new one, but since i wasn't so expert with unsoldering issues (and the solder tip was too big), aparently i damaged some nearby pieces of the pcb. my fault. so i searched online for the schematics but i found nothing. i did found however a post in a polish forum, where they cut off the male connector to solder the wires directly to the pcb. i followed some translated instructions and the images and i managed to solder all the wires as explained (in the process i discovered that 2 wires were swapped) and i got the two stereo speakers to work. the problem is that the subwoofer doesn't, and i think is related to another issue: the power switch led on the volume it's always turned on.
as a newbie in electronics i'm thinking that there are simply other swapped wires to find.
there is however the possibility that some other circuitry or transistors got damaged, but i don't have a tester and right now i'm just focusing on getting the wires right.
i'm trying not to spend any money in this because i just transfered i new place, got a new job (can't complain), and right now i have other spending priorities.
in the eventuality that the real problem is board related i will take it to a specialist sometime in the future.
i have little to none competence in electronics and would be awesome if someone cloud help.
thanks
photos attached:
-main board bottom with soldered wires
-main board top
-volume board bottom
-volume board top
 

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Thread Starter

Teo Molteni

Joined Nov 4, 2015
5
is there a way to check if the wires are correct from the pins on the volume board? i know that usually white and red are left and right, and black should be ground, but in the process of making the two speakers work i discovered that red and orange were swapped. i'm not sure i can rely on colors anymore.
 
Hi :) I'm trying to do exactly the same thing on a HERCULES pair of speakers, but i need help to :'(
How do you know which wire to solder to which point on the pcb ? You know if there is a way to do it ? Thanks, i hope u succeded
 

Thread Starter

Teo Molteni

Joined Nov 4, 2015
5
hi guys thank you for the replies. unfortunately i haven't been able to solve the problem thus far. i did find the same two references back in the day but were of little help.
i did anyway find a picture online with an apparent solution to my problem, but to me doesn't seem to work. maybe i fried the poor thing. dunno. i'll try again this weekend, and if nothing happens i think i'll take it to a specialist. i'll let u know.
meanwhile, the mentioned picture:
p__ytkaa_creative_a200_5a8bbc9.jpg
 

Thread Starter

Teo Molteni

Joined Nov 4, 2015
5
i can do better: i'll attach here a zipped zolder of everything i found on the internet thus far about model A200 and similar.
hope it helps.
 

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Thread Starter

Teo Molteni

Joined Nov 4, 2015
5
i noticed yesterday that i could refer to the pins scheme to sort of "back engineering" the inputs on the pcb, with colors and numbers, but i'm not a specialist and the schemes aren't translated so it would take time and trial&errors.
to answer your question no, sadly i don't know the corrispondence between wires and ciruitry, BUT, i think 9 pins mini dins have a standard, speaking of outputs, as every wire. i'm not 100% sure because i found discordant solutions in my research with different models (not sure about your model but i'll do a research). it seems that since the wire is not supposed to be changed or replaced (one end is soldered into a speaker, the other end has 9pins) every company has a way to adapt to 9pin mini-din to their circuitry, without bothering sobstitution.
 
Ok i see, thanks for the help.

I'll try it next week. And i dont have it with me now.
But i'll guess i'll start by unsolder the mini Din connector from the pcb and see if i can see any correspondence between the solder points and the entry point of the pins.
 
hey

I've full sound on the Sub, the Left, but the right is not loud, and no volume control...

It's really hard without any diagram...
 
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