Ddrum Rebuilds?

[cableaddict]

Hello.

I currently am using a Ddrum2 brain,  but am considering getting a Ddrum3, so this query concerns both.

I want to electronically refurbish my module.  At a minimum, replace all the electrolytic caps, which must surely be weak, off spec, etc by now.   I would also like to preemptively replace any other components that are known to age.  (Especially in the audio section & PSU.)

Before I open it up and try to see what's there  (possibly a very daunting task, as various components may have to be removed)  does anyone already have a list?



At a minimum, are schematics available?

[cableaddict]

UPDATE

I've now been using a DDRum3 brain for a while.

It's starting to have issues (Dead outputs, no midi) and I would REALLY like to keep the old gal running.

Any info at all would be appreciated. Also any contacts for someone that perhaps does this work for a fee.



If not, this module will soon go to the trash heap. Sigh.......

[macsimski]

Just open it up. I've got an AT and the internals are quite easy to get by. All screws and nice connectors. You need a good soldering iron to do the job. I bought a cheap 90w computer controlled one from aliexpress with replacable tips for about 25euro that does the job just fine. I also use desoldering needles to open up the holes after removing the bad caps.

But start with taking pictures so you know how the capacitor polarity is.

As I only have the AT that uses through hole components, the procedure of removing the caps may be different from boards with surface mounted parts (smd)

Through hole caps you remove by hearing up one leg and bending the capacitor like a lever, repeating the procedure several times with both legs until the part is loose.

Smd parts i do not desolder, but I "screw" them off like it was a bolt. By rotating them while you press them to the board, the connection wires dislodge themselfs from the capacitor body and the body just falls of after release. Then the wires can be desoldered separately

Solder flux for pcb's (also from aliexpress) is your friend in cleaning the left behind pads on the board.

I would suggest experimenting with a old piece of scrap electronics until results become good enough to do it on your ddrum.