I'm currently repairing a Yamaha YST-SW800 subwoofer and have found some of the Mos-Fets to be dead but am unable to locate the ones that i require.
This is what the service manual says and the parts that i need-
Q16- V5877200- FET- 2SK2378
Q18- V5877200- FET- 2SK2378
Q19- V5877000- FET- 2SJ406
Are there alternatives to these?
2SK2378 ---> IRF640
2SJ406 --> IRF9640
for the IRF640, choose the non-N version or the -A version (IRF640 or IRF640A, not the IRF640N)
Brillaint thank you, have found the IRF9640 but all the IRF640 seem to be N-Channel although have found a IRF640A so think might be in luck.
you can also use FQP19N20 & FQP12P20
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