Blu Diva X User manual

BLU Diva X
Service manual

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
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Diva X Service Manual
Content
1. Product Specification….…………………………………………………………………………………...3
2. Exploded View………………………………………………………………………………………………4
3. Tools………………………………………………………………………………………………………….5
4. Assemble & Dissemble
Disassembly...............………………………………………………………………………... ............. ..7
Assembly……………………………………………………………………………………….…………8
5. Picture of main board
A&B side of PCBA .…………….…………………………………………………….……………….10
A&B of PCBA Layout………….….………….…………………………….………………….………..11
6. System Block Chart…………………………………………………………………………………….....12
7. Unit Circuit Map ………………………………………………………………………..….......... ...13～20
8. Trouble Shooting Guide ……..………………………………………………………………... ... .21～39
9. Upgrading & IMEI writing………………………………………………………………...….…......40～48
10. CIT testing………………………………………………………………………………………..……...49
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Diva X Service Manual
Chapter 1 Product Specification
Diva X Features & Functions
-Dual SIM Dual Standby Single Connection
-Fashion bar phone
-BT 3.0
-FM Radio
- Multi-Media application
- T-Flash ( Support 8G SD-Card )
-QVGA240*320
–0.3 Mega-H /1.3 Mega-S
-MP3, Midi, Amr, Wav
-USB2.0 Mini USB
Specifications:
GSM Band: 900MHz/1800MHz
Display: QVGA240*320
Camera: 0.3 Mega-H /1.3 Mega-S
Talk time: 700 min
Stand-by: 270 hour
Lithium Battery: 1400MAH Li-ion Battery
USB Data cable: USB 2.0
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Diva X Service Manual
Chapter 2 Exploded View
1. Main Lens film 2. Main Lens 3. Main Lens glue 4. Receiver filter
5. Front cover 6. LCD sponge 7. LCD 8.LCD gobo
9. Receiver 10. VIB Glue 11.Vibrator 12. Camera Glue
13. Camera 14. Camera glue 15. LED 16. LED lens hood
17. Back cover 18. Camera glue 19. Battery 20. Camera lens
21. BT antenna 22. Screw 23. Battery cover 24. SPK filter
25. SPK sponge 26.Antenna 27.ANT sponge 28.Speaker
29.PCBA 30.MIC 31.Screw 32.Dome
33.Keypad
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Diva X Service Manual
Chapter 3 Tools
Solder iron Hot Air Gun
Power Supply Multimeter Solder wire, Flux
Tweezer Screw
Driver
Cable
Wrist
grounding
strap
Pick Antistatic
gloves
PC, Download cable Others
5

Chapter 4 Disassembly & Assembly
4.1 Disassemble
6

Finished.
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Diva X Service Manual
Chapter 5 Picture of PCBA
5.1 Side A
PCBA (Side A) Location of components
J701 LCD U301
Connector Flash IC
U501 26Mhz
Crystal
U101 CPU U502 RF PA
MT6250
5.2 Side B Side B
PCBA (Side B) Location of Components
D610 J304 T-flash J201 Battery
Light Emitting
Connector Connector
Diode
J303 Earphone
Connector
J302 I/O
Connector
J305 SIM J601 Camera
Connector Connector
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Diva X Service Manual
5.3 PCBA Layout side A
5.4 PCB Layout Side B
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Diva X Service Manual
Chapter 6 System Block Chart
MT6250
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Diva X Service Manual
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 Bluetooth 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.
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Diva X Service Manual
7.1.2 Baseband & CPU
MT6250
Audio circuit
CAMERA Data
transportation
Keypad
connector circuit
Data
transportation
circuit
control side
BT Data
transportation
control side
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Diva X Service Manual
7.1.3 Baseband - Keypad
7.1.4 Clock 32.768KHZ Circuit
Clock signal
transportation side
32.768 khz Clock
crystal
MT6250
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Diva X Service Manual
7.1.5 CPU to Flash
FLASH data transportation side
7.1.6 SIM data output
MT6250
SIM 2 Clock SIM 2 Data SIM 1 Clock
SIM 1 reset SIM 1 Data
SIM 2 reset
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Diva X Service Manual
7.2 MT6250 CPU Power output
item voltage 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
7.3 Battery connector
Positive
pole
Temperature
detection
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Diva X Service Manual
7.4 I/O Interface (5 PIN)
Charging input
Data download
7.5.1 System
The SKY7756X is a dual-band transmit and receive front-end module(FEM) with integrated
power Amplifier control (iPAC) for cellular handsets comprising GSM900 and DCS1800
operation. The FEM has capability in applications of U S and euro dual-band
platforms. Designed in a low profile, compact form factor, the SKY77569 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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Diva X Service Manual
SKY7756X
7.5.2 power amplifier
Start frequency
Power input
antennal
RF DC
SKY7756X
Signal AC
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Diva X Service Manual
7.6 SIM circuit
SIM 1Clock SIM 1 power
SIM 1 reset
SIM 2 Clock, reset SIM 2 power
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SIM 1 Data
SIM 2 Data

Diva X Service Manual
Chapter 8 Trouble shooting guide
Can’t Download
Cannot download
Check if it is caused by the
Replace or YES
re-solder the I/O
connector
Power on
YES
Check I/O Connector
NO
No PC, cable, tools etc.
OK NO
Replace or re-config.
Connect the cable, check if
the current is normal (about
30 mA)
NO
Check power management and
LDO, whether have normal
voltage output or open circuit
NO
Check VCORE 、 VDD 、
VADD 、 VTCXO 、 VRTC
VMEM 、 26MHZ 、
Replace U101 MT6250
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YES Disconnect the cable
and check if the chipset
is over heat.
NO YES