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General| Brand | Blu |
|---|---|
| Model | STUDIO 5.0S II |
| Category | Cell Phone |
| Language | English |
Document's objective: detail theory of STUDIO 5.0S II and provide maintenance guide for production and after service.
STUDIO 5.0S II is a WCDMA systems project developed by BLU Products using an MTK platform.
Summary of STUDIO 5.0S II features: 2G/3G bands, MP3, MPEG4, USB charger, video, Bluetooth, WIFI.
Lists key components on the mainboard: CPU, Memory, RF PA, Transceiver, G-Sensor, and other ICs.
Explains the transmit circuit: modulation, PLL, PA, and ASM for 2G/3G signals.
Describes the receive circuit: SAW filter, amplification, mixing, and modulation for GSM signals.
Lists necessary conditions, test instruments, and procedures for examining and repairing the RF TX part.
Focuses on the power management part, PMU chipset, charging circuit, and LDO outputs.
Details the specific circuit diagram for the speaker output, including connections and components.
Explains the microphone circuit, including analog and digital microphone connections and relevant components.
Details the USB High-Speed (HS) interface circuit for data transfer and firmware downloads.
Explains the keypad circuit, which uses array scanning recognized by the CPU upon key presses.
Describes the camera circuit as a sensor connector, essential for the camera's functionality.
Details circuit aspects and maintenance for the LCD, focusing on screen issues and FPC checks.
Details the backlight circuit for the LCD, including components and voltage/frequency checks for display issues.
Covers the WIFI and Bluetooth functionality, showing the circuit diagram for the MT6627N.
Describes the G-Sensor circuit, including its connections to the PMU and its role in sensing motion.
Details the Light/Proximity (L/P) Sensor circuit, showing its connections to the PMU and interrupt signals.
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