Ondrash1 wrote: Hi, I have the control board from an Electrolux dishwasher. The dishwasher is completely dead, the board seems to be fine. It has no hot spots or contacts, I only found this, see the attached photo.
It is some kind of SMD resistor with position named "R513" - next to the (filtering) capacitor for the switching source. The repair is definitely unprofitable but I'd still like to try it. I have some experiences, unfortunately I don't have access to the schematics.
Type: edw-pb100-esh-0297-01j
Update:
It initially looked like a capacitor dischare resistor, but as
crazycavan pointed, if that resistor is 0R and it blew up, it was probably placed there to allow the configuration with one capacitor or two in series (Maybe a voltage doubler for the american market?). In this case it is bypassing the non existing capacitor. The fact it blew could indicate a short into one of the IC modules.
Normally one would attach a incandescent bulb across it for testing pourposes. If it tries to start, it is safe to bypass that resistor, If the bulb is fully lit, it means a short - will require further investigation before power can be safely applied...
Disclaimer: Never mind me saying... This is full rectified AC mains - Lethal - Please only troubleshoot if you're confortable and qualified working with these sort of voltages. DC is far dangerous than AC.
I don't see a rectifier on that board. Is there any other PCB, where the AC incomming supply comes from?
Do check, if you have ~340V on that large capacitor, once powered (remove the SMD resistor first). I believe the brown capacitor next to the transformer should be a 400V type too. Check that too. It defenitivelly should have voltage. if none of them have, you need to track down the circuit to see what gave (Likelly a fuse or a PCB track).
That black disc between the two relays is a NTC Inrush Current Limiter. Do check there's about 10Ohm across it.
