| Electronics > Repair |
| Help identify part |
| << < (3/3) |
| naujoks:
Oh dear. How come it's working anyway? I tried the phone without using the handset, just using the internal number pad, speaker and microphone, and that's all working. The charging light for the handset is lit, but the handset doesn't work. I examined the battery, knowing that the owner had changed it not too long ago. It's an aftermarket battery, the original is supposed to be a KX-A36A. I measured the voltage on it, and had reversed polarity! Turns out that the connector has two separate plugs and it's possible to plug in the battery with reversed polarity. There's no indication on the headset where +/- is supposed to go. So the question is, was the battery wrongly plugged in or is the wrongly put in transistor causing the reversed charging polarity? The battery is now slowly discharging on its own. |
| wraper:
--- Quote from: naujoks on September 02, 2024, 06:23:52 pm ---Oh dear. How come it's working anyway? --- End quote --- Most likely works like a diode between what's supposed to be C and E. |
| naujoks:
So the battery was indeed plugged in the wrong way. I plugged it in the right way and let it charge for a bit and just tested the handset. It's working fine. Is there any reason why I should connect the transitor in the right way, given that it's actually all working right now? Or will that part fail again in the near future? |
| wraper:
--- Quote from: naujoks on September 02, 2024, 08:00:49 pm ---So the battery was indeed plugged in the wrong way. I plugged it in the right way and let it charge for a bit and just tested the handset. It's working fine. Is there any reason why I should connect the transitor in the right way, given that it's actually all working right now? Or will that part fail again in the near future? --- End quote --- You should re-solder it properly. It may look working properly on a first glance but it's not. For example there could be larger than normal voltage powering something, or say power won't be removed when it should. And if it's used for battery charging, it may destroy the battery. |
| naujoks:
Ok. I put it in properly. It's still working, and the PSU is now drawing only 0.1A, which is a good sign too, I guess. Thank you for your help! |
| Navigation |
| Message Index |
| Previous page |