![]() The capacitor is likely an electrolytic, that means it was liquid between the plates. The vibratory action switches 12V in an alternating manner to boost via transformer between spark events. The plug voltage goes to the winding on the tube, it ionized the xenon gas, the flash discharge drains the capacitor. The voltage is boosted by the center-taped transformer, rectified and stored in C1. There are two pins on the tube, they get the 300 to 400V DC. I am guessing the high voltage capacitor used for the flash energy is in the handle, that might be C1 in 67Dart273 schematic. The contacts could be worn, but the most likely failure due to age would be the capacitors. If you hear the buzz, that is good, the vibrator is mechanically working. It's also possible that you might "luck out" and there are different components bad in each one, "morph" the two into one working unit.Īnother approach might be to find a newer / cheaper plastic working light and install the guts in that case. If the latter might be a bad diode, or even bad transformer.ĭepending on how deep you want to get into these, there are probably DIY circuits "on the net" for transistor supplies to replace the eintire vibrator supply. If the vibrator does not vibrate, it's probably bad, or might be bad transformer, switch or connections.ĢB.If the vibrator hums but there is no high voltage at the cap, might still be bad vibrator contacts.ĢC.I cannot tell if this is a "self rectifying" (in the vibrator circuit or "synchronus") or whether there is one or two rectifier diodes in the circuit. If so, probably bad flash tube.if not.Ģ.Problems in high voltage power supply.ĢA. With the thing triggered, you should find several hundred volts DC there, perhaps 350 or so. BE CAREFUL Hook your multimeter up on the highest voltage setting, to the end wires of the capacitor. Hook up the 12V and trigger it, see if it hums. ![]() Both of those appear to have the vibrator for power.ĭo they make noise, "hummmm" when hooked up and triggered?Ĭommon problems.(in no particular order)ġ.Good power supply but bad flash tube.
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