Crown D60, no power (noob) - seeking help

[Mark Tillotson]

Definitely need a new rectifier. You need to disconnect the load after the rectifier and proceed cautiously, checking for shorts before reconnecting. Using a current limited bench
supply is much safer than plugging in and hoping. A variac can be used to similar effect if you monitor current drain.


One trick is to add series 100 ohm power resistors between PSU and amp, to limit current - if the amp isn't heavily loaded this should allow basic function while preventing high currents if there are shorts or faults.

 

[gbkd80]

Definitely need a new rectifier. You need to disconnect the load after the rectifier and proceed cautiously, checking for shorts before reconnecting. Using a current limited bench
supply is much safer than plugging in and hoping. A variac can be used to similar effect if you monitor current drain.


One trick is to add series 100 ohm power resistors between PSU and amp, to limit current - if the amp isn't heavily loaded this should allow basic function while preventing high currents if there are shorts or faults.

I changed out the rectifier and both power caps. Getting correct voltages but no audio passing through. I already ripped the board out, and I'm going to put everything aside and figure things out later.