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WTD schematic or info NCR UPS 4096-0800

Discussion in 'Electronic Repair' started by G, Jan 22, 2006.

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  1. G

    G Guest

    Howdy all - Looking for a schematic or service manual or info on the
    charging circuit of this 800 VA UPS. The Inverter works perfectly and
    there's 120 vac line voltage up to the PCB, however it shows no charging
    on the battery lines. Does this UPS relay switch to inverter upon AC
    line input failure normally or is the inverter in operation normally as
    in a no-break mode? I'm not sure if I'm seeing just a failure to charge
    or a failure to recognize and switch to a valid AC mains input.

    Any help appreciated ;)

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