Yeah........ misnomer....... the 2N transistors............ or semiconductors..... or ?
I just reversed them and all "seems" well, except that when you turn the BRIGHT Boost on, on what was a dead bright channel, the volume actually goes DOWN?
If the signal dies when you turn on the bright boost, be sure to clean and test the switch. Unlike the normal channel bright setting, this switch is more like a stompbox switch, as it switches the signal in and out of the bright circuit. So it can work in bypass position and not work in the bright position.
If I were going to shotgun a cap, I'd start with cap C219 as it is the main output cap of the bright circuit.