Hello,
I am currently repairing a hma-8300 hitachi and the power transistors are hs and not found in originals . Did you know an equivalent of 2sd675 2sd676 and 2sb655 2sb656? there are these 4 transistors mounted on each channel.
Cordialy
Steven
I am currently repairing a hma-8300 hitachi and the power transistors are hs and not found in originals . Did you know an equivalent of 2sd675 2sd676 and 2sb655 2sb656? there are these 4 transistors mounted on each channel.
Cordialy
Steven
make a list of main parameters for each from datasheet.
then go on RS components web site and look up transistors using those specs.
then go on RS components web site and look up transistors using those specs.
Compare Ft of the original and MJ150xx types - that's the speed and gain product. The Onsemi types may not have enough gain as Hfe-1 is a minimum 20 versus 60 for Hitachi or ISC (Inchange) product. It may work but perhaps not 100%.
If this is a pro. repair, I'd give the customer the option to choose the ISC replacement part or a substitute.
If this is a pro. repair, I'd give the customer the option to choose the ISC replacement part or a substitute.