Compaq 8510w - shorted cable. Working on battery only

Discussion in 'General Electronics Chat' started by LauraB, Feb 3, 2014.

  1. LauraB

    Thread Starter Member

    Dec 15, 2011
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    0
    Hi,
    Accidentally, while fixing the cable I connected plus with minus. I attach the datasheet, if someone may take a look...
    I measured some things before I started repairing:
    Q8:
    S: 19.4V
    G: 19.0V
    D: 0.01V

    Q7:
    S: 0V
    G: 0V
    D: 0V

    Q642 and Q643 DSG = 0V
    pin 26 U614 (bq24703) = 0V

    comparator U606
    1- output1 = 9,5V
    2-in1- =6V
    3- in1+ =6V
    4 - GND
    5-in2+ =5V
    6-in2- =6,4V
    7-out2 =18,7V
    8-VCC =19,4V

    I repleaced the comparator U606

    Laptop is working but only on the battery. And the battery is recharging only when the notebook is turned OFF. When it's ON it works on the battery without recharging.
    I measured U606 again:
    1- output1 = 3,3V
    2-in1- =5,9V
    3- in1+ =7,3V
    4 - GND
    5-in2+ =5V
    6-in2- =7,3V
    7-out2 =0V
    8-VCC =19,4V
    Did I miss anything?
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    I assume you connected the charger jack wrong??
     
  3. LauraB

    Thread Starter Member

    Dec 15, 2011
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    Yes, exactly.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    How's the charger now.
    Can you measure the charger output while the lap is switched on and charger plugged in to the lap.
    Measure at the jack end not at the charger PCB
     
  5. LauraB

    Thread Starter Member

    Dec 15, 2011
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    I have another charger.
     
  6. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Still can you measure the voltage at the lap top jack
     
  7. LauraB

    Thread Starter Member

    Dec 15, 2011
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    At the jack aroud 18V On the jack's socket 12V
     
  8. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    If you are getting 12V at the socket tracks on the PCB ( laptop PCB where the socket is soldered ) then it is obvious you have a faulty socket or a jack

    When plugged in with charger connected and lap on you should get the rated adapter voltage at the PCB terminal, no more no less.
     
  9. LauraB

    Thread Starter Member

    Dec 15, 2011
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    Im getting 12V when measuring 1 and 2 pin on Jack socket page 5 datasheet. Should I get there 19V? How is possible to destroy a socket by switching the +- cables?
     
  10. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    apparently you did destroy the jack or it was broken before.

    {ed}
    not between 1 and 2

    pin 2 is ID pin.

    Check between pin 1 OR 3 and ground ( pin 4 to 9 )
     
  11. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    It seems the lap uses an ID pin, if so another charger might not even work.

    You would need the OEM charger.
     
  12. LauraB

    Thread Starter Member

    Dec 15, 2011
    43
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    It looks like original charger. Its difficult to localize the right pin without a pcb view schematic. But im trying.
     
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