I can post more than 5 photos per post now! Yay!
The switch is a very curious mechanism for the Pavoni. It has four terminal blocks, and four different positions to turn the power switch knob (I have a modern replacement as the original one is missing). Originally the switch was configured as 0-1-2-3: 0 for off, 1 for one heating element, 2 for the other heating element, and 3 for both heating elements.

It looked dirty enough to warrant a cleaning, so to begin there are two M4 nuts and a C-clip on the back that can be taken off. This allows the back cover and the terminals to slide off. I documented the order of each switch and how the plastic terminal separator was arranged in each terminal block. They push against a little spring laden busbar to create the electrical connection.



Note the little brackets that attach two terminals together. They were not used per se in the original wiring scheme but this allows a parallel circuit to be set up relatively easily. The terminal itself is pretty simple compared to my Gaggia LL rotary switch, with just one spring per terminal used. The contacts appear dirty so those will be cleaned up.



The switch faceplate houses the spring locking mechanism that keeps the switch on its current setting. It holds the switch rod that turns all the terminal separators to either on or off depending on the shape. I needed to use a pair of c-clip pliers to take off the locking mechanism. It works by the horizontal spring tensioning two little slotted spacers that press aganst a washer with a square drive. Two clover washers also rest against the spacers, and those two washers are what actually locks the switch setting in place.




It will all get a nice cleaning and it's really neat what thought goes into these switches.
The switch is a very curious mechanism for the Pavoni. It has four terminal blocks, and four different positions to turn the power switch knob (I have a modern replacement as the original one is missing). Originally the switch was configured as 0-1-2-3: 0 for off, 1 for one heating element, 2 for the other heating element, and 3 for both heating elements.

It looked dirty enough to warrant a cleaning, so to begin there are two M4 nuts and a C-clip on the back that can be taken off. This allows the back cover and the terminals to slide off. I documented the order of each switch and how the plastic terminal separator was arranged in each terminal block. They push against a little spring laden busbar to create the electrical connection.



Note the little brackets that attach two terminals together. They were not used per se in the original wiring scheme but this allows a parallel circuit to be set up relatively easily. The terminal itself is pretty simple compared to my Gaggia LL rotary switch, with just one spring per terminal used. The contacts appear dirty so those will be cleaned up.



The switch faceplate houses the spring locking mechanism that keeps the switch on its current setting. It holds the switch rod that turns all the terminal separators to either on or off depending on the shape. I needed to use a pair of c-clip pliers to take off the locking mechanism. It works by the horizontal spring tensioning two little slotted spacers that press aganst a washer with a square drive. Two clover washers also rest against the spacers, and those two washers are what actually locks the switch setting in place.




It will all get a nice cleaning and it's really neat what thought goes into these switches.



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