X-108 Info How to replace the backup battery

Discussion in 'X-108' started by Marco PE3M, Sep 27, 2019.

  1. Marco PE3M
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    Marco PE3M Junior Boarder X-108 Member

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    Here on the forum, they told me to replace the backup battery, because the X108G starts up with 14.270, CW, 500 Hz. And also the time starts with 0.00 every time when I start the unit up. When I opened up the unit, I saw another battery then I expected. And it was soldered to the print. It was a MS920SE-FL27E, as the service amnual said. I only had some bigger lithium batterys, so I take a CR2032, soldered to wires on it, wrap it in some tape, and soldered on the 2 solderpoints for it, then with some double sided tape I stick it on the print. I know not the most beautiful solution, but it works. I only had to remove the battery a litle bit to the left, because otherwise it doesn't fit. But this works fine. 20190927_142524.jpg 20190927_142533.jpg 20190927_144537.jpg
     
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  2. kg9h1
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    kg9h1 Chef-Boarder X-108 Member

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    Do you know the model of the older battery? de Frank KG9H
     
  3. Rui vale
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    Rui vale Beginner X-108 Member

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    Hello
    the MS920SE-FL27E battery is rechargeable did you disable the charging system? otherwise it will bring tension in the cr2032 is not the most suitable ...
    where can i find the service manual you refer?
    Thank you
    73 from CT2GGX
     
  4. Rui vale
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    Rui vale Beginner X-108 Member

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    Battery_charging.png

    i found the service manual...
     
  5. Dean Billing
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    Dean Billing Beginner X-108 Member

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    The first version of the X108G used the solder to the board MS920SE-FL27E rechargeable battery. There are at least two versions of the X108G. A later version uses a CR1220 battery which is not rechargeable and clips into a holder. What doesn't make sense is why they put all the diodes and secondary voltage in. If they had just tied the battery to pin 6, the VBAT pin on the STM32F103VET6, it would have supplied a trickle charge to keep the rechargeable battery in version 1 charged, according to documentation for the chip.
     
    Last edited: May 20, 2020

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