Mamiya RB 6x8 Power Drive - manual/instructions?

I recently got a Mamiya RB 6x8 Power Drive film back, but don't really have a clue about how it is supposed to work. I can load it with film and batteries, but thats about it. What do the switches do, and what do the labels mean? How do you manually wind the film (if that's what you have to do)? How do you advance the film, how do you finish winding the film onto the take-up spool when the roll is finished?

Does anyone know where I can download a manual on-line, or find one reproduced on line, or order one? Mamiya USA doesn't have it one their website.

Maybe someone can take a few seconds and explain the controls here.

Thanks for the help.

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The vast majority of info on APUG manages to recycle itself many times over--questions appear multiple times and are answered again multiple times!

The search feature does well to reveal these treasures. For your question, a one of several previous discussions on this very subject gives this site with lots of info on various Mamiya gear. BTW, it's a great back, although somewhat of a battery hog. Get NiMH rechargeables and carry a spare set with you...

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