CT-403 Repair

[pianokeyjoe]

@Chas and @CYBERYOGI =CO=Windler beat me to it! Yup! Check the yellow rectangle capacitor and check that your local input AC wall power voltage is set firmly on the correct setting. Then the black square device just down of the yellow rectangle capacitor which is your AC/DC full bridge rectifier, could be shorted and thus dead. That WILL cause the mains fuse to blow. The rectifier is a set of those black and silver diodes you would find in AC to DC power adapters but in a solid package. If ONE of the 4 diodes inside that device is shorted, the whole thing is going to be shorted.

[CYBERYOGI =CO=Windler]

A recti-fire? In Germany these things are named Gleichrichter and had the nickname "gleich riecht er" ("soon it will smell") because they tended to stink apart (early ones with not too healthy selenium fumes). In my parent's house a Saba Ultracolor TV set once blew the house's main fuse, because a diode in the degaussing coil circuit had shorted and so vomited the current from a big charged electrolytic capacitor back into mains.