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Power Designs Bench PS: schematic?

Discussion in 'Electronic Design' started by DaveC, Mar 12, 2007.

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  1. DaveC

    DaveC Guest

    Looking for schematic and/or manual for TP325 triple power supply. This is a
    70's (?) lab bench supply. Like this:

  2. Palindrome

    Palindrome Guest

    Why do you need the schematic? It is almost certainly going to be an
    absolutely bog-standard mains transformer followed by series pass linear
  3. DaveC

    DaveC Guest

    Why do you need the schematic? It is almost certainly going to be an
    1. Learning. Education.
    2. If i toast a component, I hate reverse-engineering a schematic.
    3. And being a former tech writer, it's a disease, needing to have all docs
    on file. (c:
  4. You do need the schematics (unless you are familiar with that particular
    design). Some supplies of that genre are fairly complicated.
  5. DaveC

    DaveC Guest

    Why do you need the schematic? It is almost certainly going to be an
    I would add that one's need for a schematic for any circuit is inversely
    proportional to that person's expertise in the art of electrons.
  6. I suspect people get something out of taking things apart. IN doing that,
    they make the piece of equipment less of a black box, and putting their
    hands on it when they can't hurt it (because they've decided it's junk
    already) takes away some of the fear.

    Tracing the circuit is another way. There is fear of not knowing what's
    there, there is fear of some mystery circuit. Yet tracing the circuit
    gives you intimate contact with the unit. It's something as valuable
    as just taking junk apart, in devaluing the mystery.

    And as he said, it's likely to be pretty standard. And that's one of
    the tricks of circuit tracing. Get a bit of information, and then make
    the assumption that it's a fairly standard circuit based on that information.
    So if it uses a certain IC, you look at the manufacturer's datasheet or
    application note for the device, and then use the "suggested circuit" and
    see if the unit's circuit matches that.

    The beginner will always approach things in the "it must be a mystery, I
    need a schematic". But, it's not always beyond them, it's merely that
    they perceive a big first step. But the "oldtimer" who is capable in
    such things, they likely got capable because they got over that perceived
    need for a schematic, and they started signal tracing and making assumptions
    that the circuit will be fairly standard. Hence the move to an "oldtimer" can
    be shortened by making that step early.

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