01-12-2022, 11:48 AM
(This post was last modified: 01-12-2022, 11:51 AM by Radio Fixer.)
Well had a quick look at the mains end of the board and nothing obvious. Measured the caps for ESR down that end. Could take out the resistors which are shunted by diodes, according to the tester and measure them? The little square blue job bridging the mains and non mains is I guess an opto coupler. The circular brown item after the white 2 pin mains in seems to be just a fuse (0 Ohms).
I reckon the first items in the "Live" section" are a small inverter that keeps the IR circuits alive for switch on. Then when it gets a signal from the opto coupler allows mains through to the bigger Xformer for the main sw mode psu.
But this doesnt help me with a fix
Gary
I reckon the first items in the "Live" section" are a small inverter that keeps the IR circuits alive for switch on. Then when it gets a signal from the opto coupler allows mains through to the bigger Xformer for the main sw mode psu.
But this doesnt help me with a fix
Gary
