California Profile 400SX Question

[nutznboltz]

I am doing my first ever amp repair on a Profile 400SX, 400watt amp. I took covers off and looked it over. Everything looked good except a small part marked "TH1" which is soldered to the PCB board, and looks like it is supposed to be connected to the chassis on the other end of part by a screw. The end by the screw is broke and there is no way to reconnect it that I can see. What exactly is this part called, and where can I get one? Thanks in advance for your help!

[Perry Babin]

It's a thermistor. The spade terminal isn't likely to be an electrical connection. There should be two wires on it soldered to the board.

[nutznboltz]

Thanks for the reply Perry. Yes, there is two wires on it and it is soldered to the board. The other end is like a little black blob, for lack of a better term. So, I'm assuming, the screw hole beside it on the chassis is just to hold down the board? The screw was missing from that hole. Thanks!

[Perry Babin]

Yes. It's supposed to be held tightly against the heatsink so that it can sense the temperature of the amp. You can use a different type of hold-down to keep it on the heatsink.