by cyclones on Sat Feb 12, 2011 4:49 pm
$440? That's cheap to what the controller for the Cimbali M31 costs! Espresso Svcs sells that part for $815. I own one that has been repaired. It was broken when I purchased the machine, and after repair has worked fine for 1 year so far. You just have to find someone who knows their way around electronics.
There tends to be nothing particularly exotic about these boxes... usually a step-down transformer, some capacitors, a voltage regulator, resistors, a microcontroller, transistor arrays, and some relays... anyone with experience in electronics repair should be able to do it. Unfortunately, those people are harder to find these days because it is harder to find work doing electronics repair when there is tons of cheap electronics coming from China.
I am by no means an expert, but it appears two of the most common things to go bad with electronics are capacitors and voltage regulators. And cold solder joints can be a problem as well as another poster mentioned. In my particular case, it was the voltage regulator -- a 50-cent part. The guy charged me $50 labor to diagnose the problem and solder in a new regulator. He had never worked on an espresso machine before but had done a lot of electronics repair. That was certainly better than the cost of a replacement.
If given a choice between Starbucks and espresso, I'll choose espresso every time.