The service manual looks excellent for its printer info, but is nothing like as good for the duplexer (C4123).
I need to get the right-hand side cover (ie the one WITHOUT the big connector) off in order to check the sensors there. There seems to be no obvious way, but no doubt it's obvious once you know 🙂 . What is the way? Thank-you.
Btw, how are we supposed to "check the sensor", as we are blithely and repeatedly told?