Shorted power rails in the 15 pin 100W, output device marked Carvin 60-72940 Before I replace it with a fudge-pinned TDA7294 , has anyone been here before ? I'm assuming the Carvin one is no more than a pinning variant of the 15 pin , 100W SGS device, especially with 7294 in the Carvin number
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
I'd be surprised if Carvin had the volume clout to source a custom designed device. More likely a standard device, rebadged.
jak
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At the moment I'm trying to discover what , if any, is the difference between TDA7294 and TDA7294V. I have 2, one of each, in front of me and DVM diode testing they seem to be more different than just differing pinning. Datasheet sources seem to make the 2 interchangeable.
I'll have to also cross-compare to the Carvin scematic / actuality as the schematic does not have the pinning, just pin function connections
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
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There was a label over the Carvin one, not that that was obvious, that had melted into the encapsulation. Peeling it back , there was TDA729 underneath but then the last part nearly charred.
The new V version that I have here , although new, at-hand spare, must be seriously faulty. Even assuming funny MOS behaviour to diode/resistance pin to pin checking, there are 6 seriously low ohmic connections to the heatsink and none for the non-V .
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
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