Help wanted for repairing a battery heating system

Sep 18, 2006 4 Replies
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Hello,



I have a battery pack of a skiboot heating system broken (from Therm'ic vendor). The battery pack consists in a 5.3V battery and a 3 positions switch enabling graduous heat in the feet. This is done thru an oscillator outputing to a component (looking like a transistor) serving like a power switch for the second circuit consisting in the 5.3V battery and some heating wire of 10 ohms. Everything is CMS. The burned component has "1AKM" written on top, but I can't find this reference while google'ing.



Maybe some of you could help me find the exact reference or some equivalent. I can send a schema of the circuitry if required.



Thanks in advance for your help,



Renaud.


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M

Youre not giving us any of the info needed to identify it.

NT

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R

Hello, circuitry is available here:

formatting link

The component represented as a transistor (but again maybe it is not a transistor) is in the bottom right), connected to the 5.6K resistive capacity.

Renaud.

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J

http://www.ortodoxism.ro/datasheets/philips/BC859_860_4.pdf

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F

On Tue, 19 Sep 2006 07:23:45 +0200, Renaud put finger to keyboard and composed:

Since your load does not exceed 0.5A, you could use any NPN transistor with a low VCEsat, high hfe, and a 2A rating or better. You will find these kinds of transistors in remote controlled cars, for example. Some leaded types that come to mind are 2SC3420, 2SD1685, 2SC2270, and

2SD826.

- Franc Zabkar

Please remove one 'i' from my address when replying by email.
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