Building your own modular synth

[Juho L]

Originally Posted by Onkel Dunkel

Of course that a posibility too. It sounds a "little" wild that it actually caught fire :?

Exploded condenser maybe?

[Juho L]

Originally Posted by DIGITAL SCREAMS

The component must have been recieving too much voltage and overheated.

Not voltage. Too much current. *niggling*

[DIGITAL SCREAMS]

Thx for the correction Juho

Muhahahhah

DS

[3o3]

Nope, it didn't overheated or anything like that -> everything was fine. until first i heard some really weird crackle-noise almost like distortion and it just got worse and worse - 5 seconds later a smell of burning electronics - and then smoke, not much like in a hollywood-movie but there was grey-ish smoke so i pulled the plug and opened looked at the board, and it was burning. so i just took it outside and tried to minimize the damage but unfortantly i didn't do a good job so the whole board was destroyed.

There was something really bad in that board, i don't mind any more acctually.

[Juho L]

Originally Posted by 3o3

until first i heard some really weird crackle-noise almost like distortion and it just got worse and worse - 5 seconds later a smell of burning electronics - and then smoke, not much like in a hollywood-movie but there was grey-ish smoke

Destroyed cap. The cracling was probably due weakening capasitance ("rippling") which gradually led to a short circuit of the cap (quite rare, but hapens from time to time). The board was probably oxidised which led to this behaviour.

[Onkel Dunkel]

Originally Posted by Juho L

Exploded condenser maybe?

I don?t think it?s the case. They usually just make a big bang, a lot of mess and smell like rotten fish and cat piss x10. I hate that smell Proberbly a resistor that overheated because of to much current (they catch fire). Maybe a short curcuit if a small peice of metal or wire somehow got into the box and thereby causing one or more resistors to draw to much current. A lot of dust will help the fire getting started...

[3o3]

That's probably a good guess - but what did concern me was the fact that it acctually started to burn; and i did everything _right_ what if someone without no knowledge would have bought that package. wonder what could have happended then..

The strange thing about this; 2 other of my friends have bought the P9700s and they had really odd problems aswell - the unit stops working etc.

[Onkel Dunkel]

Bad curcuit design

[3o3]

I don't think so; i've heard some great stuff from paia - and there are people here in sweden that got it to work properly without doing any modifications to it

[Juho L]

Originally Posted by Onkel Dunkel

I don?t think it?s the case. They usually just make a big bang, a lot of mess and smell like rotten fish and cat piss x10. I hate that smell

Those big chemical condensers smell like rotten corpse. The other polcos just explode and/or burn.

Proberbly a resistor that overheated because of to much current (they catch fire). Maybe a short curcuit if a small peice of metal or wire somehow got into the box and thereby causing one or more resistors to draw to much current. A lot of dust will help the fire getting started...

Yup. Basic faul on televisions. Loads of dust -> slight increase in temperature -> fire. Actually that's quite dangerous situation. Many people have been killed by dusty TV's.