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Help on Mcintosh Parts 087-050

Discussion in 'McIntosh Audio' started by ken8168, Nov 5, 2018.

  1. ken8168

    ken8168 Member

    Messages:
    70
    Location:
    Hong Kong
    I suspect my C2300 has problem in one of reed relay for balance input , parts 087-050, does anyone know what the brand name and model number is? I know from service menu that it is 5v 1A 500 ohm. Thx
     

     

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  2. clinic-audio

    clinic-audio all on YAMAHA untill 1990

    Messages:
    2,182
    Location:
    France
    Don't you find that in SM ?
     
  3. ken8168

    ken8168 Member

    Messages:
    70
    Location:
    Hong Kong
    Thanks. SM doesn’t show the brand and model number of the part. Just says 5v 1A 500ohm.

    I opened the cover and checked. The part is Hamlin HE3321A0400 Reed Relay 5V 1A 500ohm

    The symptom of the problem:
    1. Sometimes left channel of CD Balance input low voice compared to right channel. The difference is in certain rate.
    2. When I switched to use RCA of CD, no problem
    3. Use other balance input (DVD, CD-R...) No problem
    4. Use MM/MC input no problem.
    5. Switch back to use CD balance input, problem happen.
    6. When I press “Mono”, the sound from both channels are balance.

    So I guess one of relays (total two relays for pin 2 and pin 3) of Balance input of CD has problem.

    I don’t understand why such standard part failed too early. The age of my C2300 is approx 7 years old.
     
  4. CohibaJoe

    CohibaJoe AK Subscriber Subscriber

    Messages:
    2,487
    Location:
    Central Jersey
    Hopefully someone will let you know. I had to order some Transistors(1900) from Mac to then Post the Mouser Part number here...Something you made need to do.
     
    Last edited: Nov 6, 2018
    UncleBingo likes this.

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