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Which parts are responsible for the signal on the mobile phone?
1: The components in the signal part can be basically divided into IF, power amplifier, antenna switch, etc.

2: No matter what kind of damage, it belongs to the warranty scope;

3: Because these components are motherboard components.

If the CPU is the "brain" of the mobile phone, then the motherboard is the "heart" of the mobile phone. CPU is the controller for reading and executing instructions, and motherboard is the brain nerve for CPU to read and execute instructions. If the CPU is the master of the switch, then the motherboard is the electrified wire.

If the computer is regarded as a fully automatic house, then the CPU is the owner of all the switches in the house, and all the operations of the house are controlled by the CPU. The motherboard is the wire that connects all the appliances and switches, and all the power will be connected and transmitted by it. The operation process of the house: the CPU will turn on the switch of the part that needs to be operated, and the motherboard will transmit the operation part of the power supply after the switch is turned on, forming a cycle mode, which shows that the relationship between the CPU and the motherboard is interdependent.

Without the motherboard, there is no motherboard to transmit power for CPU operation, and the house can't run; On the other hand, without CPU, there is no operation controller and the house can't run. Only when both exist can the house run; Then the CPU will release the power supply and instructions for the motherboard to transmit, and the house can operate normally.