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12-21-2014, 08:54 AM   #1
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Is the Flash Dead? Sunpak Auto 444 D

I got a Sunpak auto 444D flash with a camera. I've loaded it up with 4 AA batteries, and am trying to figure out if it works. There is a "ready/test" button on the back, but it doesn't cause a flash. Does that mean the thing is dead, or does it have to be triggered by a camera? If it's dead, does anyone know if there is a fuse somewhere accessible? Thanks

12-21-2014, 10:51 AM   #2
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Make sure the power switch is on battery and not HV./AC. Make sure the batteries are fresh or fully charged. Make sure the battery contacts are clean of corrosion.

There are no user replaceable or resettable parts inside the flash.
12-21-2014, 11:54 AM   #3
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To add to what Not a Number said, there is a large, very powerful capacitor inside the flash. If you don't know what you are doing, it could send you to the hospital, or worse.
12-21-2014, 12:40 PM   #4
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You should hear a high-pitched, ascending whine when you turn it on. This is the circuitry charging that capacitor. It is not very loud and it is a high pitch.

If the batteries are good and you hear the whine, the Ready light should eventually come on and the Test button should fire the flash.

If you do not hear the sound and the ready light never comes on, the contacts inside the battery holder or that capacitor may have gone bad.

Another possibility is that this flash was used with an AC adapter for a long time. This can cause the contacts in the bypass circuit to become bent and will prevent the battery from powering the flash.

12-29-2014, 07:43 AM   #5
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Sometime the flash is broken, but sometimes you just need fresh new batteries. Make sure you use new alkaline batteries to test. The ready light can light up before there is really enough voltage to trigger the flash, and if the batteries are weak you will never get full charge. Then it will just sit with the ready light on and not flash when you press the test button. I just went through this last night, so... give it a try.
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