Comments on: TR-909 PSU fix

By: ron

ron — Wed, 06 Apr 2011 08:50:54 +0000

have a look at the service manual:
matrixsynth.blogspot.com/2006/06/roland-tr-909-service-manual.html
Q701/Q702 maybe 2SC2603?

don’t remember if C702 was a tantalum capacitor; if so then replace it with an electrolytic (dead tantalums can do a short circuit). also, depending on the serial number of your 909 there might be some factory mods to be performed on the PSU as well, the SM is pretty clear about the different revisions.

good luck!

By: Lorne

Lorne — Wed, 06 Apr 2011 06:48:13 +0000

any tips on fixing reset issues in old 909 ps? Any info on what the two transistors are that are used for switching?

By: ron

ron — Sun, 27 Jun 2010 09:09:35 +0000

netzteil: +15V (2A), -15V (0,5A), 5V (5A)
hersteller: meanwell

segor.de
emtron.de

By: Axel

Axel — Sun, 27 Jun 2010 00:36:07 +0000

Hallo

das Netzteil in meiner 909 ist auch hinüber…

Könntest du mir bitte schreiben, welches Netzteil ich brauche, wo ich es kaufen kann etc…also alles um die 909 wieder zum Leben zu erwecken :)

Danke! :)