114.6. Lock modeTo switch the CA40 lock mode on or off hold in the VOL/MUTE control for 10 seconds fromthe VOL/MUTE mode. The LED SETTING indicators will flash 3 times to indicate that lock mode isnow on. When in lock mode the device cannot be managed using the VOL/MUTE control (it will flashthree times to show that it is in that mode when you turn the knob). This will protect the equipmentfrom unwanted handling until it is restored to normal operation after holding the VOL/MUTE control infor a further 10 seconds (the LED SETTING indicators will flash twice to show that the lock mode isoff).Note: once lock mode is activated it will stay activated even when the equipment is turnedoff and on again. It will stay in lock mode until the VOL/MUTE control is held in for 10 seconds again.4.7. Restore default settings and update firmwareIf you would like to restore the CA40 to factory settings, follow this procedure:1. Switch off the equipment then press and hold the knob in.2. Switch the unit back on without releasing the knob. The MUTE LED indicator will flash.3. Wait a few seconds and then switch the CA40 off again.4. The next time you turn it on, the factory settings will be in the memory.Note: for instructions on how to update the unit's firmware, see the product web page atwww.ecler.com, where you will find the update software utility and instructions on how to proceed.5. CLEANINGThe CA40 must not be cleaned with solvents or abrasive substances which may damagethe prints. Clean using a cloth moistened in water and a neutral liquid detergent, then dry with a cleancloth. Under no circumstances allow water to enter any of the orifices in the equipment.