The foil and the cutters pop straight off with a little bit of a pull. While I placed replacement foils on order, I figured I’d just use the trimmer, but then trimmer stopped working.Īpologies for the poor image quality, they’re screengrabs from a video. Recently the foil on my Remington F4790 got a hole in it, it makes the foil and cutter part of the razor unusable. Posted in Opinion | Tagged battery, disassemble, k750, logitech, repair | 22 Replies Remington F4790 Partial disassembly However, I’ve found that if ‘jumpstart’ it by shorting the V_BATT and V_MAIN terminals together for a few seconds, then it works again until it is turned off. Once it’s off, it can’t be turned back on. If I try turn it off, it doesn’t turn off immediately, but only after a few minutes. My original keyboard is still working after replacing the battery. Now I have two working K750 keyboards, although one is slightly disfigured. So with it in pieces, I ordered a replacement battery.
This also meant my disassembly was completely unnecessary. I measured the V_MAIN on the test points, and it showed an match 2.0V, like with the ‘bad’ battery. Apparently a 0.15 V drop on this battery is enough to stop the keyboard working. I measured the voltage and it reflects marginally over 3.03 V. So I popped my battery out of my new keyboard, and lo and behold it worked. I tested some other components but couldn’t find anything notably wrong with the board. With my old battery plugged in, V_BAT showed 2.86 V and V_MAIN showed a steady 2.0 V. So to disassemble it you have to pry that off, making reassembly difficult.Īfter that there are a number of screws to remove, and then the base separates, giving you access to the circuit-board. Although the battery comes out relatively easily, the keyboard’s faceplate is glued into place. I found it the other day and decided to take another look. I figured I’d salvage the solar panels or something. This was over a year ago in-between a lot has happened, but Logitech didn’t ask me to return the old keyboard, and I couldn’t bring myself to throw it out. The keyboard had a 3-year warranty I was still within, so after the retailer rejected me, I contacted Logitech who were kind enough to send me a replacement that continues to work perfectly. My battery measured 2.9V, so I assumed it was still fine, and something else had gone wrong.
The battery used is a rechargeable coin-cell battery, similar to what is used on motherboards, an ML2032 3.0V battery. The battery is not supposed to be replaced, but is relatively easily accessible, so I popped it out and measured the voltage. Not registering keypresses, nor activating any of it’s notification lights. Two years later, on returning from a short trip, the keyboard no longer worked. So joyous was I to find it on a half-price special at some stage, promptly ordering it and enjoying it’s use. Besides that it’s a standard wireless keyboard that uses Logitech’s unifying receiver, I additionally like the style and design of the keyboard. A dream come true to me, who in general is disposable battery averse. This should mean you never have to replace the battery. It’s most noticeable feature is the fact that it has a bar of solar panels along the top of the board which are used to charge the built in battery. Since the Logitech K750 was first released, I was a fan. Tl dr: Thought keyboard was broken, only needed battery replacement.
0 kommentar(er)
