TOPswitch devices do kill themselves, often due to loadshedding surges, but generally the secondary side will be perfectly fine, though the input side you will find the power supply diodes are generally shorted, and the input fuse (whatever used, from fusible resistor to fusible track) is blown. Change topswitch and diodes, and new fuse, and they do work again. Also do change the small primary side capacitor, it will likely be on it's last legs anyway. Always worth chucking in a small 275V MOV after the fuse and inrush limiting resistor though, it helps kill spikes, and large ones just gently blow the fuse, making a fast repair. R5 fuse and fix, opposed to the R100 TOPswitch.
TOPswitch devices do kill themselves, often due to loadshedding surges, but generally the secondary side will be perfectly fine, though the input side you will find the power supply diodes are generally shorted, and the input fuse (whatever used, from fusible resistor to fusible track) is blown. Change topswitch and diodes, and new fuse, and they do work again. Also do change the small primary side capacitor, it will likely be on it's last legs anyway. Always worth chucking in a small 275V MOV after the fuse and inrush limiting resistor though, it helps kill spikes, and large ones just gently blow the fuse, making a fast repair. R5 fuse and fix, opposed to the R100 TOPswitch.
Need to get new Uni T probe set when you drive to Dirtbin again..... They are quite nice, and cheap but good quality, and survive well.
Hi Sean, I recorded this video a few months ago. I have since replaced the probes with ones from one of my other testers that went faulty.