cromax X327 User manual

Customer Service DivaX Service Manual
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Service manual

Customer Service DivaX Service Manual
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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 Tinno or Tinno’s business partners, without the
approval of Tinno’s management team any copying or distribution to third party are not allowed. Without
the approval of Tinno, publishing, distribution, copy, save or transfer of this or part of this document are
not allowed. Tinno reserves the right of modifying or updating for this document without notification and
Tinno has the final power of interpretation.
Chapter 1 Product Specification
Content
1. Product Specification….…………………………………………………………………………………...4
2. Exploded View………………………………………………………………………………………………5
3. Tools………………………………………………………………………………………………………….6
4. Assemble & Dissemble
Dissembly..................……………………………………………………………………….................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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Chapter 1 Product Specification
Specification:
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
DS128 Features & Functions
Dual SIM Dual Standby Single Connection
Fashion bar phone
BT 3.0
FM
Multi-Media application
T-Flash（Support 8G T Card）
QVGA240*320
0.3 Mega-H /1.3 Mega-S
MP3, Midi, Amr, Wav
USB2.0，Mini USB

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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.PCB
30.MIC
31.Screw
32.Dome
33.Keypad

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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

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Chapter 4 Disassembly & Assembly
4.1 Disassemble
Remove the battery cover 1
Remove 4 screws 2
Remove the back cover 4
Remove the BCBA. 5
Open back cover 3
Stick the LCD film 6

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Finish
4.2 Assemble
Remove the lens film 1
Install the keypad 2
Stick the lens film 7
Remove the keypad 8
Install the back cover. 4
Install the PCBA 3

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Finished.
Fasten the 4 screws. 6
Button the cover 5
Install the battery cover 7

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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
U101 CPU
MT6250
J701 LCD
Connector
J305 SIM
Connector
J601 Camera
Connector
J303 Earphone
Connector
J302 I/O
Connector
U502 RF PA
J201 Battery
Connector
U301
Flash IC
U501 26Mhz
Crystal
D610 发光二极
管
J304 T-flash
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
MT6250

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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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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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7.1.3 Baseband –Keypad
7.1.4 Clock 32.768KHZ Circuit
Clock signal
transportation side
32.768 khz Clock
crystal
MT6250

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7.1.5 CPU to Flash
7.1.6 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

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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

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7.4 I/O Interface (5 PIN)
7.5.1 System
Overview
The SKY7756X is a dual-band transmit and receive front-end module(FEM) with lntegrated
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.
Charging input
Data download

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7.5.2 power amplifier
frequency
Power input
RF DC
Signal AC
antennal
SKY7756X
Start
SKY7756X

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7.6 SIM circuit
SIM 1Clock
SIM 1 reset
SIM 1 power
SIM 1 Data
SIM 2 power
SIM 2 Clock, reset
SIM 2 Data

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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
NO
NO
NO
YES
YES
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