Hp z3801a

Discussion in 'General GPS Discussion' started by ribbonmicsrus, Aug 1, 2012.

  1. ribbonmicsrus

    ribbonmicsrus

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    Hi everyone, newbie here.
    Hope this is in correct section, my apologies if not.
    I bought a Z3801A about 6 years ago, fitted internal psu etc and was working fine. However just gone to switch on unit after lapse of 2 years and all is not well.
    Power light comes up but the main Lucent DC -DC converter gets hot pretty quickly. Checking supply rails shows TP6 at 2.4v (5v), TP8 at 6.7v(15v), TP7 at -7.5v(-15V).
    The Datel DC-DC block is giving correct voltages. Disconnecting PSU connectors to main board and oven reveals no change, no electrolytics are getting hot. I guess this means the Lucent unit is most likely U/S, or does anyone know of a fault that can cause this.
    Regards
    Andy
     
    ribbonmicsrus, Aug 1, 2012
    #1
  2. ribbonmicsrus

    ribbonmicsrus

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    re HP Z3801A

    Subsequent checking shows TP8 (+15v) as measuring 5.2 ohms to ground , disconnecting L4 from the o/p of the Dc-Dc converter still shows 5.2 ohms on the converter side, so I guess I have a duff module, are they still available?
    rgds
    Andy
     
    ribbonmicsrus, Aug 1, 2012
    #2
  3. ribbonmicsrus

    Universal_Time

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    Might try posting at time-nuts
     
    Universal_Time, Sep 10, 2012
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  4. ribbonmicsrus

    ribbonmicsrus

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    re z3801a

    Thanks for that, will give it a try.
     
    ribbonmicsrus, Sep 10, 2012
    #4
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