Blu B1080B User manual

1

BLU Aria

Service Manual

2

ATTENTION

Boards, which contain Electrostatic Sensitive Device(ESD), art indicated. Following information

is ESD handling:

- Service personnel should ground themselves by using a wrist strap when exchange

system boards.

- When repairs are made to a system board, they should spread the floor with anti-static mat which is also grounded.

- Use a suitable, grounded soldering iron.

- Keep sensitive parts in these protective packages until these are used.

- When returning system boards or parts like EEPROM to the factory, use the protective packages as describe

3

CAUTIONS

1、 Please read this service manual carefully and make sure all elements of anti-static are in place before the

repair work is carried out.

2、 Servicing and alignment MUST be undertaken by qualified personnel only.

3、 Please use specified tools and equipments for servicing, in which the parameters need to be calibrated with

specified criteria.

WARNING： This document can only be used internally by BLU or BLU’s business partners, without the

approval of BLU management team any copying or distribution to third party are not allowed. Without the

approval of BLU, publishing, distribution, copy, save or transfer of this or part of this document are not

allowed. BLU reserves the right of modifying or updating for this document without notification and BLU

has the final power of interpretation.

Content

1. Brief Introduction….…………………………………………………………………………………...3

2. Exploded View………………………………………………………………………………………….4

3. Tools……………………………………………………………………………………………………..5

4. Assemble & Dissemble

Dissembly..................………………………………………………………………………….........6

Assembly………………………………………………………………………………………….…..7

5. Picture of main board

A&B side of PCBA .…………….…………………………………………………….…………….8

A&B of PCBA Layout………….….………….…………………………….………………….……..9

6. System Block Chart…………………………………………………………………………………...10

7. Unit Circuit Map ………………………………………………………………………..….......11-18

8. Trouble Shooting Guide ……..…………………………………………………………….... 19-36

9. Upgrading & IMEI writing………………………………………………………………...……...38-46

10. CIT testing…………………………………………………………………………………… ……...47

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Chapter 1 Specification

Specification :

Network: 850MHz/1900MHz or 900MHz/1800MHz

Display: 1.77“TFT 128*160

Camera: 0.08Mega with sw upgrade 0.3M;

Travel Charger AC Adaptor: 5V 350mah

Lithium Battery: Standard (900mAh)

USB Data cable: USB 1.0

Aria(B1080B) Features & Functions

 Dual SIM

 Fashion bar phone

 Wireless FM

 Moner detector flash

 Multi-Media application

 0.08M sw upgarde to 0.3M by sw (option)

 T-Flash（Support 8G T Card）

 1.77“TFT 128*160

 MP3、MP4、3GP、AVI

 Micro USB

 3.5 Audio Jack

 BT 3.0

5

Chapter 2 Exploded View

1. Lens

3. Receiver

4. Front cover

5. FM antenna

7. LCD

9. PCBA

11. Speaker

13 Back cover

18 Battery

19 Camera

21 DOME

22 Keypad

6

Chapter 3 Tools

Power Supply

Multimeter

Solder iron

Hot Air Gun

Solder wire, Flux

PC, Download cable

Others

Pick

Screw

Driver

Tweezer

Wrist

grounding

strap

Antistatic

gloves

Cable

7

Chapter 4 Disassembly & Assembly

1. Disassembly Process

Finished.

1. Remove the battery cover

2. Unfasten the 4 screws by screw driver

4. Remove the PCBA ..

5. Stick protection film for front cover.

3. Prize up the back cover by pick

6. Stick protection film for LCM

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2. Assembly Process

Finished.

4. Install the rear cover module.

3. Install the PCBA on the front cover..

1. Remove the protection film.

2. Remove the protection film..

6. Install the back cover.

5. Fasten the 4 screws.

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Chapter 5 Picture of PCBA

5.1 Side A

PCBA (Side A) Location of components

Side B

5.2 Side B

PCBA (Side B) Location of Components

J201 battery

conector

J302 I/O

connector

J502 SIM

connector

U101 CPU

MT6250

U502 RF

PA IC

SKY77542

Mic

D601 Light

Emitting diodes

Keypad

Connector

LCD connector

J301

T-flash connector

Side A

U501

26MHZ

Camera connector

J303 Earphone

connector

J503 SIM

connector

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5.3 PCBA Layout side A

5.4 PCB Layout Side B

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Chapter 6 System Block Chart

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Chapter 7 Unit Circuit

7.1.1 System Overview

MT6250 is a GSM/GPRS handset chip solution which integrates RF,analog baseband,digital

baseband as well as Power Management Unit(PMU) and can greatly reduce the component count

and make a smaller PCB size MT6250 including Bluetooch and FM. Besides,MT6250 is capable of

Single Antenna Interference Cancellation (SAIC) and AMR speech. Based on a 32-bit ARM7EJ-S

RISC

Processor,MT6250 provides an unprecedented platform with high quality modem performance. The

typical application diagram is shown as Figure 1.

TM

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Chapter 7 Unit Circuit

7.1.2 Baseband & CPU

Audio circuit

Keypad

connector circuit

Data

transportation

circuit

CAMERA Data

transportation

control side

BT Data

transportation

control side

MT6250

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7.1.2 Baseband – Keypad

7.1.3 Clock 32.768KHZ Circuit

Clock signal

transportation side

32.768 khz Clock

crystal

MT6250

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7.1.4 CPU to Flash

7.1.5 SIM data output

SIM 2 Clock

SIM 2 reset

SIM 2 Data

SIM 1 Clock

SIM 1 reset

SIM 1 Data

FLASH data transportation side

MT6250

16

item

voitage

current

Vcore

1.2v

200ma

Vio

2.8v

100ma

Vadd

2.8v

150ma

Vtcxo

2.8v

20ma

Vrtc

1.2v

200ma

Vmem

2.8v

150ma

Vsim

2.8v

20ma

Vcs

2.8v

200ma

vcs

1.8v

150ma

7.2 MT6250 CPU Power output

CPU 电压与电流输出对照表

7.3 Battery connector

Temperature

detection

Positive

pole

17

7.4 I/O Interface (5PIN)

Data

transpo

rtation

Charge

input

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7.4 System Overview

The SKY77542 is a dual-band transmit and receive front-end module(FEM) with lntegrated

power Amplifier control(iPAC) for cellular handsets comprising GSM850 and DCS1900

operation. The FEM has capability in applications of US and euro dual-band platforms.Designed

in a low profile, compact form factor, the SKY77542 offers a complete Transmit VCO-to-Antenna

and Antenna-to-receive SAW filter solution. The FEM also supports Class 12 General Packet

Radio Service(GPRS)multi-slot operation.

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7.5 SIM circuit

SIM 1Clock

SIM 1 reset

SIM 1 power

SIM 1 Data

SIM 2 power

SIM 2 Clock, reset

SIM 2 Data

7.4 power amplifier

frequency

Power input

RF DC

Signal AC

antennal

SKY77542

Start

20

Chapter 8 Trouble shooting guide

Can’t Download

NO

Replace or

re-solder the I/O

connector

Check power management and

LDO, whether have normal

voltage output or open circuit

Cannot download

Check if it is caused by the

PC, cable, tools etc.

Power on

NO

YES

No

YES

OK

Replace or re-config.

Check I/O Connector

Connect the cable, check if

the current is normal (about

30 mA)

Disconnect the cable

and check if the chipset

is over heat.

Check VCORE、VDD、

VADD、VTCXO、VRTC、

VMEM、26MHZ、

32KHcrystal

Replace U101 MT6250

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