Question about Vivitar 283 Flash

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Charging problems The flash gave no signs of operation. After disassembling, I tried to troubleshoot the DC-DC converter and the charging circuits. I was able to get it charging somewhat - when powered on, the flash gave a whine that rose in pitch, but more slowly than I expected. The capacitor only charges to about 100v. When I disconnected the cap, the charging circuit reaches 400v, and the voltage rises much more quickly. How do I test the capacitor to verify if it's bad?

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Try to check that capacitor by parallel it with a good capacitor.
Any uf capacitor that is close will do. Just make sure you have a 300v or more cap.

atdlee@netzero.com

Posted on Feb 26, 2008

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Posted on Jan 02, 2017

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