Chosen Solution
Hello, I have a Nikon MH-23 quick charger. Some months ago, it suddenly stop charging the battery. Even the LED indicator doesn’t turn on. I checked the fuse and it’s ok. The voltage after the diode bridge is correct. The control IC also has voltage to feed it (5Vdc). In the output of the the flyback secondary side the voltage is also present (8Vdc). I tested the LED individually and it’s fine, in fact I notice that the control IC don’t send voltage to it. Apparently neither component looks like broken or burned. Ofcourse, I know it doesn’t assure the correct operation of each component. I believe maybe some protection is already activated. Some one have an idea of what’s happening or how I must proceed to check it?. Thanks.
Hi, Check to see if any of the capacitors have ‘bulging’ ends. Faulty capacitor(s) can produce incorrect voltages and may prevent the correct operation of the IC. See image for an example of what blown capacitors look like to know what to look for. This is not an image of the components in a Nikon MH-23 quick charger.
(click on image to enlarge for better viewing)
I was having the same problem and I found advice from a flickr site from eight years ago, as I am not as technically proficient as you seem to be and my battery is now charging. So I cannot take credit for this answer, but it was useful for me: I’ve had this happen on my D40X a few times with the original battery. When the battery gets very low, the charger may fail to recognize the battery is present. I don’t know why, but this method worked for me multiple times: Unplug the charger and remove the battery. Wait a few seconds. Plug in the charger without the battery. Wait a few seconds. Slide the battery in and out of the charger a few times and watch for the charge light to come on. If it comes on, leave the battery there for the whole cycle and you’re OK again. They key learning is to not let he battery get completely depleted before recharging. That is, to where the camera will shut itself down.
Did you manage to solve your Problem? I have the same issue with my charger and my capacitors don’t look like those in the picture.
