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Sahara DP3601 video projector,2006

Discussion in 'Electronic Repair' started by N_Cook, Jun 17, 2013.

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  1. N_Cook

    N_Cook Guest

    Bright orange, 2 of these , minus the security necessary top control panel
    for each, not found a pic of them yet.
    15 way connector for a panel , that when removed, disables the projector.
    Any chance of hacking them, there is a IR receiver lens but that presumably
    would be disabled with an absent top panel? presumably most of those 15 ways
    will be a diode matrix for control buttons and anunciator LEDs.
    Little info found on these projectors but Google images suggests Delta and
    similar model numbers maybe a related badge name. Googling the lamp numbers
    has not shown up any model Xref
    One lamp is physically blown, the electrode , external to the axial quartz
    glass stem but in the central bright quasi-focused beam area is broken, not
    actually where it emerges from the stem. Surrounding the break , and also
    the supposedly working one, in that area, is a neat looking aggregation of
    spikey white crystals around the conductor. I've not found an image of a new
    bulb yet , but could there have been a piece of silicone there that has
    degraded to silica crystals (asbestos-like)? perhaps creating a hotspot for
    the lamp current and then failure, actual and potential, at that point?
    Any pointers to a procedure for hacking the control-defeat function of these
    top panels?
     
  2. N_Cook

    N_Cook Guest

    a pic of the projector and top control panel
    http://www.sahara-products.com/images/content/607279001132675284.jpg
    and
    "Each projector has a unique serial coded panel and it recognises only that
    one; replace it with an unauthorised panel and the projector will not work.
    Therefore, should a thief obtain even one panel, they will not be able to
    re-boot any machine but its manufactured partner."
    so presumably the only chance is to find some powerFET control switch or
    something simple like that
     
  3. N_Cook

    N_Cook Guest

    Comes apart quite easily . Seems to have 2 separate smps , one for the
    electronics proper and one for the lamp only.
    Of the 15 lines 11 go to 3K3 pullup Rs , presumably for key matrix.
    Of the remaining 4 , one is gnd, one is clock line of an I2C 24C08, one to
    its data line and one to its Vcc
    So what sort of thing goes in the missing control panel, like a car radio
    removable control panel, linked to those 4 lines?
     
  4. N_Cook

    N_Cook Guest

    The E0 and E1 CS lines are tied low. Could it be as simple as the 2K on
    the internal 24C08 is repeated on the control panel on another 24C08.
    Then either copying the contents to another one or even switching the
    internal E2 line so the internal 2K is read twice, woud be all that's
    required?
     
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