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Pete
Pete, Electronic Engineer
Category: Camera and Video
Satisfied Customers: 17023
Experience:  Over 16 years of experience installing and repairing electronics.
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I have a Balcar professional flash unit that I need help

Customer Question

Hi, I have a Balcar professional flash unit that I need help with.
I'm only getting about 48 VDC to the discharge capacitors and I need to know how to test the AC AD converter circuit.
Thanks Tony
Submitted: 1 year ago.
Category: Camera and Video
Expert:  Pete replied 1 year ago.

Hi Tony,

You can test the AC/DC converter circuit using a multimeter set on DC Voltage to test the output from the converter.

Customer: replied 1 year ago.
Hi Pete, thanks for getting back to me; if I understand I should be getting around 300 V DC to the terminals at the capacitors? If so I'm only getting 48 V DC. Tony
Expert:  Pete replied 1 year ago.

Hi Tony,

Yes, that is correct. If you are not getting the correct voltage then the converter is faulty and will need to be replaced.

Customer: replied 1 year ago.
Ok Pete, I suspect the transformer in the voltage converter if I send a picture could you guide me on the input /output leads?
Pretty sure there are no available modules for these anymore.
Thanks
Tony
Customer: replied 1 year ago.
Maybe that last question needs to be reformulated, is it possible to test and replace the faulty component on the converter?
Expert:  Pete replied 1 year ago.

Hi Tony,

Finding the faulty component will be difficult, without using schematics and spending a lot of time trying to diagnose which part has failed.

Usually the entire converter is just replaced for a faster, cheaper and more reliable fix.

Customer: replied 1 year ago.
Except I can't find that part, so I guess it just isn't fixable.
Expert:  Pete replied 1 year ago.

If you have schematics and some test tools, then you can debug the circuit and find that faulty part.
Or a local electronics repair tech could do it for you.
However the cost for labor to do that repair often exceeds the cost of a new converter, so most people will simply replace it.
Pete.

Customer: replied 1 year ago.
Thanks Pete, got the tools but I don't have the schematics and I'm in France so there are no electronics stores around here.
Tony
Customer: replied 1 year ago.
I haven't been able to find any parts either, so I guess this just needs to end & stop wasting your time unless you have any other ideas,?
Tony
Expert:  Pete replied 1 year ago.

Hi Tony,

Without schematics the only other possibility would be to use a similar flash unit to take some voltage readings from and compare.

Pete.