My SB600 works off and on. Some shots come out ok...some are dark as if the flash did not fire. I know it sounds strange, but when the flash fires it has a different sound (it maybe the camera) when it does not work properly. The red light on the back of the flash will blink when it does not work properly on the shot. Can anybody please help me? Thanks alot...
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Re: SB600 Works Erratically...
If red light on flash is blinking, flash is charging. In shooting rapidly, sometimes flash will go off even though it isnt fully charged. This can give dark shots. Flash eats batteries like crazy, best to always use fresh batteries for each shoot.
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Test fire it in the dark to see if you can locate the arc. If no arc, it is likely arcing in the charge capacitor or what might be left of the thyristor.. Which could mean a broken contact, solder connection or wire..
Remember that even though sb-600 is wireless, it is based on infrared. This usually means having a clear line-of-sight between flash commander and remote flash. Any object that gets in way can block signal from flash commander. Weak batteries in flash will also cause remote operation to be sporadic.
The sb600 needs to be able to see the preflashes of the sb800, so this is probably caused by one of two things. The first thing I'd check is whether or not the light sensor on the side of the sb600 was covered, blocked, or facing away from the sb800. I've had problems outdoors when I forgot to have the light sensor face the camera.
If the sensor was facing the camera, it is possible that the flashes didn't have a good line of sight to each other. That normally shouldn't matter, but if there is a high ceiling and lots of people, it could be the case. I don't know if it will help, but in any case I would recommend using a StoFen Omnibounce on the sb800 to increase the likelihood that the light finds a direction where a surface to bounce off of is found.
I have sent my SB-600 to Nikon twice in the past 6 months to resolve this problem. They have fixed it both times, but never told me what the problem was. I've had it back for exactly 1 day now, and it's started back up again already. If I receive a solution (or replacement), I'll let you know!