[HARDWARE] X5a not recognising charger (Fix)

Discussion in 'Telechips TCC8902 Development' started by Pretty Funked Up, Jan 20, 2011.

  1. Pretty Funked Up

    Pretty Funked Up Member

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    Tablet / Device:
    MID X5A with G sensor
    Hi

    Ive run into a problem where the x5a wont charge anymore, simply doesnt respond to plugging charger in.
    The unit runs off of USB power only and dies the instant you remove the cable.

    The Unit statrted behaving very funny when battery was extremely low, crashing all over, however it recovered and works fine via USB just wont recognise the charger

    Forgot to mention I've tested charger and its ok and even tried a different one just to rule it out, its defo the x5a and not the charger.

    opened her up and PCB markings are:
    HSG7001A_V3(TWO TOUCH)
    (2010_08_08)

    It implies its dual touch but that feature never worked, everything else works perfectly though Gsensor etc.

    The battery is 2x 7.4v, 1800mAh (theyre wired in parallel to give 7.4v, 3600mAh)

    I charged the battery up outside the unit and tested at different stages while charging and compared spare part votlage reading to my meter reading and they tally perfectly.

    However this hasnt helped my problem, it still doesnt recognise the charger even though I can run off battery instead of usb.
    I think reflashing the FW with the same again might help but cant find a guide to do it

    anyone have any ideas?



    more info:
    Firm: 2.1-update1
    Kernel: 2.6.29 root@localhost#157
    build: MID 1.1

    Bat status: not charging
    power: USB
    Bat lvl: 10
    Bat scale: 100
    health: good
    voltage 7050mV
     
    Last edited: Jan 20, 2011
  2. l_n

    l_n Senior Member

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    check the solder joints where the charger input connects to the PCB. it could just be a bad solder joint there or at the batteries.
     
  3. Pretty Funked Up

    Pretty Funked Up Member

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    OK
    I have continuity between the negatives (power jack & battery)
    but not between the positive.

    Can anyone check theirs to see if they have continuity between the positives (power jack and battery) ?

    UPDATE:
    Dont worry fixed it

    it was bad solder join at the positive on power jack
    THANKYOU so much l_n
     
    Last edited: Jan 21, 2011
  4. l_n

    l_n Senior Member

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    no problem.. buy me a beer? ;)
     

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