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01-27-2012, 07:11 AM   #1
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Metz 45CL-4 flash malfunction

Hello Forum
my flash went unused for several years and the rechargable pack died. I got a regular AA cell battery holder and installed 6 duracell alkaline batteries. This worked fine for a couple of hundred cycles -- then -- the flash started to make a crackling noise, like the sound of plastic cracking and the flash would not work. I know NOW that electronic flashes have to be turned on every few months to 'form the capacitor'. The thing is that it worked fine for a while then stopped - is the capacitor dead? Does it sound lke the flash is toast? Thanks

01-27-2012, 09:15 AM   #2
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Hi papa john, and welcome in the forum.

The contents of high capacity capacitors have a tendency to expand prior and when they die. To prevent an explosion damaging the surroundings, they usually have a built-in expansion zone - kind of reversed crushable bin you know from the front of cars. The noise you heard could have been the expansion process of the case - or it tried to expand too much and exploded. But of course it may have been another electronic part giving up. If it was the capacitor, and it was not ripped open contaminating other parts, it probably could be replaced. Whether it would be worth the effort, I wouldn't know.
01-27-2012, 01:54 PM   #3
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I'd recommend you also ask in this forum, or post here in the future as users there are specifically interested in flashes: Pentax Flashes and Lighting Technique -

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