How to Repair a 12V battery charger?

Henri48 · by **Henri48** » 11/10/13, 16:06

Hello,
I just had a bad surprise: my car battery charger (Norauto) no longer works! It was quietly stored in the cellar. My neighbor tells me that this kind of material does not like moisture. Is there a component of the circuit that, classically, breaks down with moisture? Thank you for your reply. Henry

Petrus · by **Petrus** » 11/10/13, 18:18

it's a black block with a single button?
I also had a PB with mine, the button did not react anymore.
After replacing this button it worked perfectly again.

BobFuck · by **BobFuck** » 11/10/13, 18:46

Open the thing and post pictures (bonus if they are not blurred)

Forhorse · by **Forhorse** » 12/10/13, 20:35

Is it a battery charger or a battery killer? (the kind of device sold 2 balls and which controls neither the current nor the charging voltage)
If it's the second answer then you can dump it without regret

Henri48 · by **Henri48** » 14/10/13, 11:45

Thank you for your answers. here are some pictures. Everything looks normal to me!?!

Henri48 · by **Henri48** » 14/10/13, 11:49

I am not good at internet. I think I have to copy the link to show you the picture:

jonule · by **jonule** » 14/10/13, 14:33

what does the fuse say?
if you do not see it, take a picture of the 2 sides of the circuit board, if it is on it, it should be normally near where the juice arrives (red wire).
mine was dead once, it was a car type fuse (12V) 10A.
if not balance of the bomb contact (type wd40 or dégrip'oil) on the components and the contacts (switch).

chatelot16 · by **chatelot16** » 14/10/13, 17:00

simple battery chargers, with only a transformer and rectifier are not as battery killer: it's payday charger: when the car is completely palt is because we have forgotten the lighthouse, we put this kind charger and a few hours after the car can start, and the alternator finished charging ... these charger without regulator are bad for charging a battery regularly

the charger from the photo may be better since there are electronics ... but we need to know what is the function of this electronic: I've seen with an electronic bazaar not even making the adjustment, but just a reverse protection function

Demonte a little more and put a photo of each face of the circuit

BobFuck · by **BobFuck** » 14/10/13, 17:14

we will start from the catch:

First check if the transformer supplies power.

Branch the thing.

High tech method: voltmeter (in AC mode) on the secondary, then in DC mode after the diodes.
Low tech method: Are there LEDs that light up? Does the transformer emit a buzz?

Henri48 · by **Henri48** » 18/10/13, 09:33

sorry for the slowness of the answer. Here are the photos you ask me:
Thank you for your help, Henri

Join an algorithmic censorship-free community of enthusiasts, technicians, scientists or engineers. Ads removed after registration.

How to Repair a 12V battery charger?