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Newly Picked Up Fisher 250-T

Discussion in 'Fisher' started by Fltacoma, Oct 21, 2018.

  1. Fltacoma

    Fltacoma New Member

    Messages:
    5
    Hello everyone, I just posted in the introduction section not too long ago. I picked up a Fisher 250-T at an estate sale yesterday. When I looked at the back, I noticed that the left output fuse was removed, along with the cap and screw on the inside as well. When I disassembled it earlier tonight, I noticed that two wires inside were cut and heat shrinked as well. I am not quite sure what the previous owner was trying to accomplish? I am still learning how to read schematics, but noticed that the two wires that were cut were leading down the same hole as the transformer wires were? What were the prior owners trying to accomplish?
     

     

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  2. larryderouin

    larryderouin Turn it UP, POP? PLLUUEEEZZZZZEE Subscriber

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    Location:
    Glen Burnie Md.
    Take some pictures of the area and post them. I can open up my 250-T when I go down to the house later this week (probably Tuesday or Wednesday.) and compare your pictures to my unit. We're better at diagnostics when pictures are involved rather than a somewhat vague description.
     
  3. Fltacoma

    Fltacoma New Member

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    5
    I will take some pictures tomorrow after work and post them for you to take a look at.
     
  4. rufleruf

    rufleruf AK Subscriber Subscriber

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    1,116
    Those fuse holders are easily broken - hopefully they were just trying to replace a busted fuse housing.
     
    Last edited: Oct 21, 2018
  5. larryderouin

    larryderouin Turn it UP, POP? PLLUUEEEZZZZZEE Subscriber

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    Location:
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    But you can go to Parts express and get new fuse housings and fit them on to the chassis and wire it up as original easily, IF that's where the wires go.
     
  6. Fltacoma

    Fltacoma New Member

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    5
    Here are the pics
     

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  7. larryderouin

    larryderouin Turn it UP, POP? PLLUUEEEZZZZZEE Subscriber

    Messages:
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    Location:
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    Right now I'm flat on my back with a knee injury (dog jerked me sideways and my knee gave out). Looks like they might have disconnected the fuse leads and soldered them together to bypass. Get some new Fuse holders, install and I'll compare your pics with my 250-T or 400-T parts chassis by this weekend.

    EDIT!!!! I just looked at my 400-T and 250-T. Both only have the one fuse outside for the Mains. COMPARE the Serial # of your 250-T with the Manual. If it's higher than 87xxx or so it's a 250-TX. Also check the 250-TX manual. Both are available on www.hifiengine.com. Registration is mandatory but free.

    Larry
     
    Last edited: Oct 24, 2018
  8. rufleruf

    rufleruf AK Subscriber Subscriber

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    I probably have some of the missing fuse holder caps... PM is interested.
     
  9. larryderouin

    larryderouin Turn it UP, POP? PLLUUEEEZZZZZEE Subscriber

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    Location:
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    The spkr (OUTPUT FUSES) are BETWEEN the Amp outputs and the SPKR Switches. You'll have to do some wire tracing from the output of the amp board to the fuses and or from the spkr switches to the fuses. Bets are the previous owner bypassed the fuses as was done on the 250-TX (No fuses mounted). I would return them to NORMAL 250-T operation. Below are sections of the pertinant areas of the schematic fro the 250-T 1st and then the 250-TX

    250-T NOTE F-2 & F3 right off the board OUTPUTS.
    250-T Amp to spkr switch.jpg

    250-TX BOARD SCHEMATIC
    Note lack of Fuses
    250-TX Amp to Spkr Scat.jpg
     
  10. Fltacoma

    Fltacoma New Member

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    Hey all. Sorry for the slow response, but the serial number is 20091 if it helps...
     
  11. larryderouin

    larryderouin Turn it UP, POP? PLLUUEEEZZZZZEE Subscriber

    Messages:
    21,821
    Location:
    Glen Burnie Md.
    Use the 250-T / 400-T manual. That covers yours.
     

     

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