Identifying Clock Crystal Oscillator Symbols and Layout
An electronic component circuit that have the ability create real time clock signal. a vibrating crystal that made by so-called piezoelectric material produce a maintained and sustained frequency such as applied into real time clock like quartz wristwatches.. This one is being used to maintain the clock system in a digital circuit and maintain Radio Frequency transmitters and Receivers.
It labeled sleep clock oscillator or just clock oscillator in schematic diagrams.
In Cellphones if the clock oscillator is faulty it results on not powering the phone. The phone is dead, because as stated above that oscillator supports on digital radio frequencies circuitry.