Blu LIFE 8 User Manual

BLU LIFE 8
SERVICE MANUAL

Blu LIFE 8 Specifications

General

Resolution	720 x 1280 pixels
RAM	1 GB
Internal Storage	8 GB
Front Camera	2 MP
Battery	2000 mAh
SIM	Dual SIM
Expandable Storage	Up to 64 GB
Rear Camera	8 MP
Operating System	Android 4.4 KitKat

Summary

1. Introduction

1.1 Compile Objective

Details the purpose of the maintenance guide for LIFE 8, targeting debug and after-service personnel.

1.2 Project Background

Describes LIFE 8 as a new product, candybar smartphone based on MTK platforms for marketing evaluation.

2. LIFE 8 Summarize

2.1 LIFE 8 Product Description

2.2 Assembly Components on TOP Layer

2.3 Assembly Components on Bottom Layer

2.4 LIFE 8 Hardware Diagram

LIFE 8 Main Components of Mainboard Parts

3. RF Parts

3.1 Basic Diagram

Provides a block diagram illustrating the basic signal flow of the RF circuit.

3.2 TX Part Troubleshooting

3.2.1 TX Process Analysis

Explains the step-by-step process of signal transmission in the TX circuit, from microphone to antenna.

3.2.2 TX Circuit Troubleshooting

3.2.3 TX Circuit Examine and Repair Flow Chart

3.3 RX Circuit Troubleshooting

3.3.1 RX Circuit Analysis

Explains how the RX circuit receives, processes, and demodulates signals from the antenna to the CPU.

3.3.2 RF Part Examine and Repair

3.3.2.1 Necessary Condition

Lists the essential setup and configuration requirements for analyzing RF parameters.

3.3.2.2 Troubleshooting to Receiver Circuit

Provides step-by-step guidance for troubleshooting the receiver circuit.

3.3.3 RX Examine and Repair Flow Chart

4. BASEBAND PARTS

4.1 Power Management Part Diagram

Explains the function of the power management unit (PMU) and its role in charging and power supply.

4.2 Power On

4.2.1 Normal Power On

Describes the standard procedure for powering on the phone using the power key.

4.2.2 Schedule Power On/OFF

Explains how the RTC module can be used to schedule automatic power on/off times.

4.2.3 Charge Power On

4.2.4 Phone Cannot Power On Troubleshooting

4.3 Audio Part Troubleshooting

4.3.1 Speaker Circuit

Details troubleshooting for the speaker circuit, including checks for resistance and output signals.

4.3.2 MIC Circuit

Guides on troubleshooting the microphone circuit, checking its functionality and power supply.

4.3.3 Earphone Circuit

4.3.4 Receiver Circuit

4.4 Vibration Issue

4.5 Download Process

4.5.1 NAND Flash Download

Provides detailed steps and common failure points for NAND flash downloads.

LCD Part

4.6 CTP Part

4.7 Camera Part

4.8 SIM Card Issue

4.9 Charge Function

5. Defect Description Abbreviation

6. The Tag