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Forum: Flashes, Lighting, and Studio
08-02-2011, 05:12 AM
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I too fell in love with these flashes and have been trying over many years to get one working! My original unit stopped working after a period of 6 months of nonuse I started charging it . After about an hour I came back to it and nothing so I swapped battery packs and started again then after a while I heard a pop like a cap gun. then after a while again I took it off the battery and checked it on AC and it seemed to be fine. I then assembled a battery pack by soldering it up my self (not very well done) but still no charge (or pops) . Bought another device as-is from ebay. The same; works on AC, but not DC. Now (six years later) I bought yet another "new in box", well it was in original box but it didn't look so unused to me.
It initially worked with very long (45-60s)cycle times then perhaps I brought the batteries below the charge level and the decades old batteries gave out. The other previous units with the self-made battery-pak are buried in the cellar with some other junk that's too hard to get to right now. This later unit originally worked, so I'm prepared to start new and build a battery pack. Are the batteries in series or parallel? I found it hard to get the right angle with little play room once you've soldered them. Any theories about the other units that work on AC but not DC?
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Forum: Welcomes and Introductions
04-17-2011, 08:05 AM
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Hi Bill,
Stumbled across your listing for Stobonars.. I too have about three (770) all non-working. I got my first with a camera and with a little attention it worked fine After sitting about a year I went to charge it and noticed it wasn't taking a charge. Then I noticed after a while a popping noise. It did this a few times actually and I assumed the batteries were just beyond charging. It would however work on an AC charger. I asked an electronics guy to look at it and he identified the DC circuit vs the AC circuit but without a schematic he wouldn't be able to properly trouble shoot it. HE also noted somebody had worked on it before too.
I tried to solder up some cells but I wasn't able to solder properly and the kind of heat I needed was "too dangerous" for exploding batteries etc! I then bought two 770s "as is" from the USA but they were the same ..ie no batteries worked on AC. I was fiddling with them one night and twice got so badly shocked that I packed all three away awaiting a later date that was some 5 years ago. Do you think if I could cobble the batteries together, the original one might work or was that popping sound a definite no-go? At the moment they are so buried in the cellar it will be a task to find them!!
Thanks
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