4. BASEBAND PARTS
LIFE 8’s baseband is composed of MT6592. The MT6592 is the core chipset with
responsibility for the power supply, keypad, LCD, audio, communication and the control of
all parts of the system.
The digital parts of the baseband are all the strengthen GSM/WCDMA processor with
integrated channel encoder/decoder, complex/de-complex, encrypt/decrypt.
4.1 Power Management Part Diagram
The power management has the function of management of the charge and power supply.
The Power Management part is composed of the PMU(Power Management Unit) chipset
and the periphery charging circuit. The output of the LDO integrated in the chipset as
below: VDD28:2.8V, VDD18:1.8V, VDDMEM:1.8V, AVDD:2.8V, VRF: 2.8V, VSIM:
1.8/2.8V.
The details, please refer to the repair schematic. LDOs turn on sequence refer to power on
process.
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