Hi.
I have this cooling/heating box/cascan/refrigerator that keeps food and beverage cool or hot that you take to camping you know? I don't remember it's name in English.
Anyway, this one I have can be hooked up to the car lighter and the cable have a small circuit at the car light end of the cable.
This small pcb is like burned out and I wanted to try to figure out which component got burned. The only components it have are:
3x 1N4001 diodes
1x 3V6 zener
1x ~300 ohm resistor
1x NPN H1061 transistor.
Attached are a couple of pictures of the circuit.
The visible connections, if I'm not mistaken are like the 3rd picture attached.
Both 1N4001 are outputting a voltage in multimeter of about 0.48V when I select the diode mode on my multimeter. I compared with a 1N4007 I have here and that I know its OK and it outputs about 0.5v. Zener outputs about 0.67v.
I'm not sure I can test diodes like this with the circuit off and with no load.
Can you guys suggest anything?
What is this circuit used for? To bump up the car lighter voltage to 12v which is the required voltage for the refrigerator to work?
Enviado do meu SM-G935F através do Tapatalk
I attached the outer casing of the adapter.