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Thread: TRS-80 Model 1 Power Supply - not working

  1. #11

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    I am not an EE, how would i know ?

  2. #12
    Join Date
    Mar 2013
    Location
    Chaffee, MO
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    Default

    A picture of the Model 1 PS makes it much clearer.



    Larry

    17.jpg

  3. #13
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    Jan 2007
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    I'm not familiar with the Model 1 linear supply, but very often, these simple supplies have either an overcurrent fuse or a thermal fuse in the primary. Simple enough to locate in most cases.

  4. #14
    Join Date
    Mar 2013
    Location
    Chaffee, MO
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    Here are the actual Power Supplies.

    16.jpg

    Larry

  5. #15

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    Quote Originally Posted by pkasson View Post
    I am not an EE, how would i know ?
    The transformer is the heave module on the cord you plug into the wall. My understanding is that the main regulator is in the keyboard.
    You can measure the voltages from the transformer. It just takes a meter and knowing what to look for. This is not rocket science yet..
    Dwight

  6. #16

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    Sent you an email and follow up - sounds like hit spam or something. Do want to get a PS from you if you still have any.

  7. #17
    Join Date
    Mar 2016
    Location
    Pikesville, Maryland
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    216

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    Quote Originally Posted by pkasson View Post
    sent you an email and follow up - sounds like hit spam or something. Do want to get a ps from you if you still have any.
    sent you paypal invoice for power supply - waiting for payment
    jay

  8. #18

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    just paid the invoice. thank you.

  9. #19
    Join Date
    Aug 2013
    Location
    Keansburg, New Jersey, United States
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    If you look at this page, Ian Mavric offers a kit to build a brand new heavy duty power supply for a Model I.

    http://members.iinet.net.au/~ianmav/trs80/
    -----[ Al ]-----

    3 - TRS-80 Model I, TRS-80 Model 4D, LNW-80 Model I, Coco, 3 - Coco 2, Coco 3, 2 - Tano Dragon 64, C64, C64c, C128, 2 - Atari 800XL,
    Atari 520-ST, Atari Mega-2 ST, Amiga 1000, TS-1000, TS-2068, ZX-Spectrum, IBM 5150, 2 - Apple ][gs, Laser 128, and a butt load of Macs and Intel PCs.

  10. #20

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    Al,

    Thanks for the link !

    Pete

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