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-----Original Message-----
From: gumielectronic
Sent: Dec 2, 2010 12:04 PM
To: tr-707@yahoogroups.com
Subject: [tr-707] Easy Slide Pot Repair
Greetings all. I'm new here. I recently traded a Metalbox 8008 module for a TR-707 (I think I got the better end of that deal).
Anyway, the 707 had a problem with one of the sliders, which turned out to be an easy repair. After searching this forum I found a lot of folks had similar issues, but I couldn't find any documentation of this (potentially very easy) fix:
My TR-707 had a broken slide pot for the Mid Tom. It wouldn't change the tom's volume and the voice was very loud and a little distorted from both the main and individual outputs. When I tested the pot with my meter, I got a sporadic reading of several hundred k anywhere in the slider's travel. When I removed the pot from the board, I noticed that the slider's shaft was a little loose in its track (i.e. I could wiggle it up and down slightly). Then I noticed I could get the normal resistance range (0R to about 40k) if I pressed down on the slider's shaft while moving it. All I had to do was lightly pinch the tabs of the slider's case, which reseated the slider snug into its track. Now it works like new.
I've posted photos and a full tutorial here:
http://gumielectronic.net/ p=834
Hope this can help someone. Looking forward to learning from you all...
-gumi