Hello,
I had a quick look on the 2232 schematics and my 2215A board layout:
The 2232 has a full wave rectifier (CR965 & CR967 coming from pin 20 and 22 of the transformer) and a capacitor C965 and a current limiting resistor R965 installed to power the additional fan.
Based on the empty room on my 2215A PCB it looks like they only planned a half wave rectifier?
There is room for 1 diode coming from pin 20 of the transformer, 1 capacitor and 1 resistor and a 2-pin connector for the fan.
Will try this,
Un saludo,
Leo
satbeginner