Expression 3 - ETC

Console’s back panel
Opening the console
In some cases you will find it necessary to open the console by raising the
face panel. For example, if your console is an older model, you may need
to open the console to gain access to DIP switches located on the main
processor board. For Expression 3 consoles, a Spare Parts kit is stored
inside the console box and retrieved by raising the face panel.
Raising the face panel
Follow the procedure below to raise the Expression 3 face panel.
1. Loosen the knobs at the front of both ends of the front panel that
secure the face panel.
2. Raise the face panel and hold or prop it in upright position.
Replacing fuses
Expression 3 consoles have three fuses. Two are for AC input power and
the third is for the interface used by optional RFU and remote I/O devices.
If the console or remote devices connected to it fail, first verify that power
is available at the AC service outlet and that all cables are properly
connected and undamaged.
When replacing console fuses, make sure you use the same type. The AC
Input fuses are type T6.3A. The fuse protecting the Remote 12VRFU/
Remote I/O circuits is type F1.6AT2.5A. Both types are slow action, 250V
fuses. Replacement fuses of both types are provided in the console’s
Spare Parts Kit, which is located beneath the face panel.
326 Appendix A Installation