Схема сотового телефона Other ERICSSON A1018s/A1018sc

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A1018s/A1018sc Standard Electrical Repair
4/00021-2/FEA 209 544/16.B
1.2 Abbreviations
Digital circuit.
Over voltage protection.
Buzzer, LED, pads for display.
Analogue circuit.
Test point.
Transistor or diode.
Antenna connection.
Contact surface at the circuit board.
Ground for analogue signal.
Audio From Mobile Station
Audio To Mobile Station
DC voltage used for charging the battery through the system connector.
Logical signal used to activate the background illumination.
Real time clock. The clock that keeps track of time and date.
Battery voltage (~4.8 V).
DC voltage for the processor and memory (3.2 V).
DC voltage for the processor and DSP (2.5 V).
DC voltage for the radio part (3.8 V).