Question about Canon 580ex Flash Main Pcb Pre-programmed Part
Posted by Anonymous on
Are you asking how or can it be done? A little more information would get you an answer that might work.
Posted on Sep 07, 2014
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Posted on Jan 02, 2017
Yes. If you were able to set a faster shutter speed, then you would not expose the entire frame and would have the shadow of either the first or second shutter curtain (or both) partially masking the frame.
At higher speeds, the shutter is never fully exposed: before the first shutter curtain has finished travelling across the frame, the second one has stated it's journey. All SLR's have this issue and on some older models you could only use a maximum 1/60th of a second.
In practice though, in dark conditions the "slow" shutter speed does not affect exposure as the true exposure will be determined by how much light the flash puts out, and it puts this light out in as little as 50 microseconds (50 millionths of a second) for a modern electronic flash bulb.
Faster shutter speeds can be used successfully, but only with flashes which operate in high speed mode. What they do is to make the flash burst seem longer by rapidly firing the flash bulb many times. This trick can ensure that there is sufficient light to expose the frame at the highest shutter speeds. Shutters which operate at, say, 1/4000 may seem fast, but compared to the speed at which a single electronic flash burst operates, it's an eternity.
Posted on May 24, 2010
SOURCE: Broken flash Canon 580 EX.
Most likely that Capacitor has "Gassed" as we say. It is now destroyed, however usually too the Driver Semiconductors "Blow" as well. I have seen this before, it is not uncommon. An enormous amount of energy is stored in this capacitor and circuit, and they often fail in an explosive manner.
What you need to do, is find a Canon authorised servicing center, contact your local or head office of Canon, and inquire as to a local repair center.
Now when you take the Flash in for repair, please ask for a 'Quote" before allowing any repair work to commence, this then will allow you to make an informed decision as to repair or replace.
It is hard to give an exact cost but I would expect, that around $80.00 to $125.00 for the basic repair, would be about right for a repair. BUT depending on what exactly was wrong, it could very quickly escalate.
I think you may find, that the cost of repair, may even approach, the cost of a new unit? This is also why getting a "Quote" is beneficial.
However if you can desolder and solder, could obtain the EXACT Rating and Value Capacitor and Semiconductors, (read ALL damaged bits) and were prepared to do a little work, it is entirely possible to repair this unit oneself. but be very careful when doing so, as flash guns can give a very very nasty "Bite" (speaking from experience :) lol)
Posted on Oct 03, 2010
SOURCE: How to restore factory settings
To reset the C.Fn settings on the flash just go into C.Fn mode and set each setting to 0.
If there is no C.Fn icon showing, the flash is at it's factory default setting.
Hope this helps :)
Posted on Mar 09, 2011
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