Fixing SX-70 Sonar Autofocus Lens Stuck Problem

I decided to see what's going on inside. I first used two stationery clips (super useful!!) to pry open the silver lens housing bit by bit, then the sonar unit's front part, luckily both parts are not secured by screws, so I just had to figure out where the notches are, 4 in the lens housing, 4 in the sonar unit. Interestingly, the red button on the housing is connected to the electronic board not by wire but through contact points, so I could completely remove the silver lens housing and the sonar unit front cover, exposing the gears and electronics.

I was facing the gears and found no objects that stuck the lens gears, dispaired then I just touch every possible electronic contact points (using the clips), switching on and off the sonar unit, manually turn the focus wheel harder away from the infinity position..... no luck. Finally by shorting the shutter button's 3 electronic circuit points frantically out of despair, vola!!! the lens suddenly turned and the camera started to focus whenever I short the autofocus circuit!
Eldo (from Yahoo SX-70 group) was right! The lens can be stuck in the infinity (fully-retracted) position. Brutal force alone didn't work. This fix was done by removing the housing so that I had access to the focusing wheel completely using opposing fingers and shorting the circuits frantically.

See more notes on the picture on flickr:
http://www.flickr.com/photos/moleskineart/544509794/
http://www.flickr.com/photos/moleskineart/544603005/