Author Topic: Please help - Executive Audio HA200 damaged SMPS  (Read 495 times)

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Offline stojkeTopic starter

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Please help - Executive Audio HA200 damaged SMPS
« on: December 04, 2020, 10:42:57 am »
Device was worked on by someone and had damaged traces and incorrect components in the amplifier. All of that was traced and repaired as it is in the working channel. The Power Source IRFP450 blew and was replaced but also died  diodes DZ0501 DZ0500 D0500 and D0501. MOSFET IRFP450 is tied Gate to Source over 30 ohms and an transformer, it relates to diodes in the following way Source goes to D0500 and then to DZ0500 and after that to Gate. (Same goes for the other one). Source ~ D0500 -|>|- . -|<|- DZ0500 ~ Gate .
Diodes are MELF type with no markings. DZ are MELF and D are miniMELF.
Any idea what are the diode values here?? The fuse blows right away, D0500 and D0501 were shorted and DZ0500 and DZ0501 were infinite resistance.


 


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