Epson EL 486UC - Manual (Page 73)

6. Gently push the oscillator into the socket.
7. Secure the oscillator to the system board using a new tie
wrap. (If you didn’t buy an upgrade kit, you must obtain
the oscillator tie wrap separately.)
Post-installation Procedures
After you install or remove options such as memory modules
or a microprocessor, you must run SETUP to update the
computer’s configuration. See Chapter 1 for instructions.
Additionally, you may need to add some commands to your
configuration files. See your operating system manual and the
manual that came with your optional equipment.
3-30 Installing and Removing Options