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Type: Posts; User: vossi

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  1. Can I program the cpld with the jedic file and a...

    Can I program the cpld with the jedic file and a chinese xilinx-programmer via usb?
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    In the US 5160 supply from '84 are the RIFA...

    In the US 5160 supply from '84 are the RIFA time-bombs. They looked not so good - had some cracks. I changed them with new x2-caps.
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    Today I repaired both 5160 supplys ;-) In both...

    Today I repaired both 5160 supplys ;-)
    In both the 3300uF caps at the 7905 regulator had short cirtcuits!
    It's the only cap in the Schrack PSU from this manufactorer - I think it's a bad cap!
    ...
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    I measured the outputs with a dmm under load with...

    I measured the outputs with a dmm under load with the working mainboard. I think I have to check all the caps first...
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    Thanks for support, but I tested with this...

    Thanks for support, but I tested with this minimum configuration.
    Both mainboards are ok, have no short circuits and works with an other IBM supply from 1984 (made in USA).
    The faulty supplys from...
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    Hi, at one mainboard the C56 had a short circuit...

    Hi, at one mainboard the C56 had a short circuit and at the other board was a faulty dram-chip.
    I changed these - and now both boards are running great with an working power supply.
    But both...
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    Repair of 5160 XT power supply

    Hello,

    I have two IBM 5160 from 1985 and 1986 with the 220V "Schrack" 130W supply.
    Both have now output at all voltage-lines. I have testes under load condition with a mainboard, cga,...
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