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Transformer Specs
Transformer Specs
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Old 22nd February 2019, 11:15 AM   #1
sbusso is offline sbusso
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Default Transformer Specs

Hi,

I have fried the PSU of an Aphex Voice Channel 230. Then I have reversed engineered the PCB and got almost everything except the transformer. The old transformer with no description or name, was sent to a shop to make a new one but it didnt work and now I have only the schematic left. Is it possible to reverse the spec of the transformer from the schematic (pdf attached) ? Le load is quite low and the power rating of the channel is 15W.

Thank you.
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File Type: pdf SMPS_R1.pdf (65.9 KB, 9 views)
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Old 22nd February 2019, 11:39 AM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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I have been repairing SMPSUs for years and never come across a faulty transformer other than physical damage.
The mains fuse will save it.
There are a number of components the fault could be and without working on it, I would only guess at, Power FET, driver/osc chip, R2 will undoubtedly be damaged as will the surrounding components.
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Old 22nd February 2019, 11:45 AM   #3
sbusso is offline sbusso
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You are right, the transformer was not faulty, a diode after the transformer did burn, I could not get SMPSU working again so I went on a harder way to rebuild it from what I had, but I was not able to reuse the transformer and tried to get a new one, unsuccessfully.
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