Transistor Equivalent

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  • MirceaL
    Equivalent for A965 transistor
    by MirceaL
    Hi Guys,

    I am currently working on fixing an active subwoofer and found 2 bad transistors. One is A965 and the other one is C1815.

    C1815 is easy to find but A965 not so much , at least where I live (Romania).

    Can anyone help me identifying an alternative / equivalent for this , A965, transistor ?
    Is there an online tool / engine that I can use that could help in this ?

    Thank you
    Mircea
    01-13-2023, 01:29 PM
  • Nevillet
    2SB633 PNP transistor equivalent suggestions Marantz PM310
    by Nevillet
    Hi All,
    I have a 30+ year old Marantz PM310 that is blowing fuses. It appears that one of the output transistors (Q732) is shorted (Q731 is fine). It's a 2SB633 which does not seem available from the usual suppliers. Is there a more modern equivalent which would do the job?

    The complimentary NPN (Q729 & Q730) is a 2SD613.

    I have attached the service manual.
    Many thanks.


    https://www.badcaps.net/forum/attach...1&d=1629738387...
    08-23-2021, 11:22 AM
  • magneh
    Behringer Eurolive B205D repair - help identifying transistor
    by magneh
    Hello
    Got this speaker from a friend , defective. Power led comes on and off , in a loop.
    Disassembled, got the board out, and after a bit of measuring I found a low resistance on a 5v6 line. With a bit of current I found a transistor heating up on that line (labeled T1 and 113 as on pic).
    After removing this guy, I got a value of 0.7 in diode mode on that 5v6 line, which before had 0.02 or something like that.

    I tested powering it up without the IC, and the speaker turns on and stays on, and works fine

    Still, I need to replace this transistor....
    06-18-2025, 02:34 AM
  • elsomer
    help to identify transistor msi ms-15ck1
    by elsomer
    hi people, i need some help to identify a transistor(q14) that is missing on the board, so the gpu has no voltage i think that q14 activate the phases for gpu, but i dont have schematic or boardview, but i think its the same transistor than q15 and q16, thanks...
    02-17-2025, 05:30 PM
  • rddube
    Help with blowing transistor NAD T752 receiver
    by rddube
    Hello everyone,

    I guess I need help from the masters to try and find what is frying a 2SC5669 transistor on the left channel of this front center Amp for a NAD T752.

    Was working perfectly and all of a sudden I heard a pop, and then a glow from the amp. Not only did the 2SC5669 burn a leg, but R520 which is a 220 ohm resistor partially burned - it now measures 110 ohms.

    I bought this amp second hand fairly cheap as it was not working, it went into protection mode. I finally traced it down to the same transistor Q510, the one that just popped. It was shorted...
    09-01-2022, 05:19 AM
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