Here is a brief video from Sam where he describes what silent mode does, why you would want to use it, and how to enable it.
1. Press the ‘System Menu’ button
2. Press the ‘Down Arrow’ to go to page 2
3. Press on the ‘Adjustment/Maintenance’ button
4. Press the ‘Silent Mode’ button
5. Toggle silent mode either ‘On’ or ‘Off’
(In this example silent mode is turned on)
You’re done!