What is this part

Discussion in 'Datasheets, Schematics, Manuals and Parts' started by Joebrad27, Apr 20, 2017.

  1. Joebrad27

    Joebrad27

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    Hi can any one please tell me what this circuit is, on the box it says 3 amp control, isolate before opening.
    Thanks in advance.
     

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    Joebrad27, Apr 20, 2017
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  2. Joebrad27

    Minder

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    Appears to some kind of AC-AC inverter?
    M.
     
    Minder, Apr 20, 2017
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  3. Joebrad27

    73's de Edd

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    Sir Joebrad27 . . . . .

    Dammmmmmn . . . . Joe . . . . you rated a reply from both EINSTEIN and 'ole Numb-nutz here . . . .

    I am not particularly seeing 3A principal power devices on that board, with the sole two heaviest discrete power items being the two metal film resistors , one of which is connected back to the illumination medium of the lighting source internal to the switch. The main adjustment pot is being a 100k . . .which is somewhat upwards from what we would typically see being associated with a power supply.

    We confirm that this of circa 1996-1997 vintage, with this actual design evolvement being related to earlier times.

    At the terminal blocks we see the N N1 L2 L1 assignments . . . soooooooo in case this unit does get AC line connected, I could see 1 of the 5 polyester white block and a power resistor serving as an AC dropper function to feed to a Zener to get a low voltage power supply associated with the 5 small signal semis in the rear. BUT I see no filter capacitors of any size excepting the two lilliputian sized small black units. (What are their cap values and voltage ratings ?)

    They did seem to have placed a power switch and a fuse that is probably greater than THIS particular board justifies UNLESS they are switching and looping the switched output to a larger power related associative assembly in additional to somelow level info at the L and E terminals.

    (Can you now further confirm, that there are no POWER FETS --BIPOLARS—FETs –SCRs or TRIACS sandwiched between the PCB and using the alum-nin-ninny-yum-yum front panel as a heat sink ? )

    The rolling out the door / or/ ready for sale . . . final sticker . . .suggests this being at the 17th week of 1999.

    The best identifier of the board proper would be the boards silk screening of the identifier
    BP (Band Pass ? )3 ~??SEL
    Issue 4
    Feb 96

    With the particular interest on the

    BP3 ~ ?? (Blue wire blocks out)SEL

    I could see this board more frequency or filter related than anything else .


    73’s de Edd
     
    Last edited by a moderator: Apr 21, 2017
    73's de Edd, Apr 21, 2017
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    Richard9025 likes this.
  4. Joebrad27

    Joebrad27

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    Thanks for your detailed analysis of my thing, btw there is no other electronic components anywhere on the board that you cannot see in the photo, I greatly appreciate your hasty response and out of interest is there anything I could use this for, other than salvaging the parts.
     
    Joebrad27, Apr 21, 2017
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  5. Joebrad27

    73's de Edd

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    Sir Joebrad27 . . .


    If it was given to me and for me to use. I would consider the housing size, along with the markings on the faceplate and the illuminated power switch.
    Then use it to build or install either a varaiable speed control or a temperature adjustment for one of my standard 60 watt soldering irons.
    All of the other parts wold be pulled to go into parts storage. . . . BTW . . . . wwhat were the elect caps values 10 ufd ? and what are the semiconductors part #'s . . .expecting 2N39XX series or 2N2222 or 2N2907's.
    Plus that toroidal coil looks like possibly having only one winding . . .ergo only 2 connections.
    Do you even know where this came from, or the "type" of person / company that had it ?
    Or did it have absolute identity isolation, by being a $1 item at a yard / garage sale ?

    73's de Edd
     
    73's de Edd, Apr 21, 2017
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  6. Joebrad27

    FuZZ1L0G1C

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    @Joebrad27 .
    If possible you may want to upload a close-up of the track-side, either through macro-photography or flatbed scanner.
    Also to partner that, a perpendicular "aerial shot" of the component side.
    Then a isometric view from 4+ angles around boar's components (sharp focus), to help ID part-numbers.
    That way, the two images can be traced and schematic drawn, to identify said unknown species.
    I originally thought "light dimmer", but too many components and connectors fer dat. ;)
     
    FuZZ1L0G1C, Jun 27, 2017
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