The Sony R7 really is quite the special box I'd read reports about. It just makes you smile at the awesomeness of sound :-) Whereas my TC M-OneXL makes you smile with the pure realism of sound, albeit somehow not quite so lovely.
Here is the DPS-R7 (and others) Owners Manual and Service Manual.
Since the DPS-*7 units were very similar to each other, this R7 battery upgrade howto should be useful for F7, M7 and D7 owners too. Sony even made a remote control which could control a whole rack of DPS-*7 units (and remotely switch between them), called the Sony RM-DPS7 - here's the RM-DPS7 service manual.
© copyright Malcolm Smith 2010-10-30 - last updated 2010-10-30 - links verified 2010-10-30