Page 1
FLY SERVICE SUPPORT
FF178 SERVICE MANUAL
Page 2
FLY SERVICE SUPPORT
TABLE OF CONTENTS
INTRODUCTION………………………………………………………………………2
Chapter 1 EXPLODED VIEW AND COMPONENT DISPOSAL…………………3
EXPLODED DIAGRAM…………………………………………………………….3
DISASSEMBLY AND ASSEMBLY ………………………………………………………..4
SERVICE TOOLS…………………………………………………………………….4
DISASSEMBLE……………………………………………………………………….6
ASSEMBLY……………………………………………………………………………7
Chapter 2 SYSTEM BLOCK DIAGRAM……………………………………………8
Chapter 3 INSTRUCTION OF THE UNIT CIRCUIT……………………………….9
Chapter 4 ACTUALL BOARD……………………………………………………….10
SIDE A…………….…………………………………………..……………………………….16
SIDE B……………………….………………………………………………………………...16
Chapter 5 CIRCUIT INTRODUCTION………………………………………………21
Chapter 6 TROUBLESHOOTING……..………………………………………..…..27
Chapter 7 UPGRADE SOFTWARE INTRODUCTION…………..……………….34
Page 3
FLY SERVICE SUPPORT
INTRODUCTION
The purpose of this document is to help service workshop technicians to service products.
This service manual must be used only by authorized service suppliers. The content of it is
confidential. Please note that provides other guidance documents for service suppliers.
Follow these regularly and comply with the given instructions. while every effort has been
made to ensure the accuracy of this document, some errors may exist. please keep in mind
also that this documentation is continuously being updated and modified, so always watch
out for the newest version.
CAUTIONS
Please refer to the phone’s user’s guide for instructions relating to operation, care, and
maintenance, which include important safety information.
1. Servicing and alignment must be undertaken by qualified personnel only.
2. Ensure all work is carried out at an anti-static workstation and that an anti-static wrist
strap is worn.
3. Use only approved components as specified in the parts list.
4. Ensure all components, modules, screws, and insulators are correctly re-fitted after
servicing and alignment.
5. Ensure all cables and wires are repositioned correctly.
Electrostatic discharge can easily damage the sensitive components of electronic
products. Therefore, every service supplier must observe the precautions which
mentioned above.
GENERAL REPAIR INFORMATION
1. Make sure your testing equipment is functioning properly before beginning repair work.
2. before starting repairs you must observe ESD precautions such as being in your ESD
protected area and connecting your wristband.
3. use gloves to avoid corrosion and fingerprints.
4. cover windows and displays with a protective film to avoid dust and scratches.
5. use a lint-free cloth to clean the LCD.
6. when cleaning the pads use a soft cloth\ESD brush and isopropanol. Do not use a glass
fiber pencil: this scratches the surface and will corrosion.
Page 4
FLY SERVICE SUPPORT
7. non-faulty mechanical parts(except shielding lids and bent parts or soldered
components). May be reused if they are not soldered.
8. when removing the shielding lids make sure to replace them with new ones, otherwise
the high-frequency leakage can affect the device.
9. always use the original spare parts.
10. check the soldering joints of the parts concerned with regard to the fault symptom. And
resolder them if necessary.
11. remove excess soldering flux after repair.
12. observe the torque requirements when assembling the unit.
13. please aware that some malfunctions may be software related and solved by an update
Page 5
FLY SERVICE SUPPORT
Chapter 1
EXPLODED VIEW AND COMPONENT DISPOSAL
1.1 EXPLODED
Page 6
FLY SERVICE SUPPORT
1.2 DISASSEMBLY AND ASSEMBLY
1.2.1 SERVICE TOOLS
Page 7
FLY SERVICE SUPPORT
Solder wire, soldering paste Wrist grounding strap, Antistatic gloves
Page 8
FLY SERVICE SUPPORT
1.2.2 DISASSEMBLY
Remove battery cover Remove battery
Remove 6 screws Remove front cover
Take out PCBA Remove LCD insulate
Use the soldering iron Separate LCD Remove camera insulate
Page 9
FLY SERVICE SUPPORT
Use the soldering iron Separate camera Use the soldering iron separate speaker
Use the soldering iron Separate LED Use the soldering iron Separate receiver
Use the soldering iron Separate vibravor Use the soldering iron Separate MIC
Page 10
FLY SERVICE SUPPORT
1.2.3 ASSEMBLY
welding MIC welding vibravor
Welding receiver welding LED
Welding speaker welding camera
Paste camera insulate welding LCD
Page 11
FLY SERVICE SUPPORT
Paste LCD insulate Assemble PCBA
Assemble back cover Assemble 6 crews
Assemble battery Assemble battery cover
Page 12
FLY SERVICE SUPPORT
Chapter 2 ACTUALL BOARD
SIDE A AND B
Page 13
FLY SERVICE SUPPORT
Chapter 3 Electric introduction
3.1 Main CPU introduction
3.2 memory
Page 14
FLY SERVICE SUPPORT
3.3 BT/FM
3.4Power
Page 15
FLY SERVICE SUPPORT
3.5 RF CIRCUTR
3.6 Handset MIC
3.7 EAR MIC
Page 16
FLY SERVICE SUPPORT
3.8 Earphone Audio
3.9 SPEAKER
3.10 RECEIVER
Page 17
FLY SERVICE SUPPORT
3.11LCD
3.12 CAMERA
3.13MINI USB PORT
Page 18
FLY SERVICE SUPPORT
3.14 KEYPAD
3.15 Powerkey
3.16 DUAL SIM
Page 19
FLY SERVICE SUPPORT
3.17 SD CARD
3.18 CHARGE
3.19 BATTERY CONNECTOR
3.20VIBRATOR
Page 20
FLY SERVICE SUPPORT
Chapter 4 Troubleshooting Guideline
4.1 Can not download
4.2 Can not power on
Yes
No
Yes
No
No
Yes
Can not download
Can power on?
USB port appearance
check ok?
Change CPU U0100
Check download tool,
download cable, software ok ?
Check power on problem
Clean or change new USB
port
Change new tool, new cable
or new software
No
Yes
No
Yes
No
No
No
Yes
No
Yes
Can not power on
Change battery ok?
Change battery
The current 0?
The power on current low?
＜100mA.
Change U402
Change U0100
Change U0100 or X202
The power on current high?
＞200mA;
Remove U0100 current ok?
Heat or change
U0100
Page 21
FLY SERVICE SUPPORT
4.3 Can not recognize SIM
4.4 Keys not work
Yes
Yes
Yes
Yes
Keypad not work
Change Volume key
The resistance to ground
of the keypads ok?
Volume key not work?
The resistance to ground
of these keypads ok?
Power key not work?
Change Power key
Heat or change U0100
Heat or change U0100
No
No
change SIM1
Change SIM connector
Change U0100
The SIM connector
appearance ok?
The SIM connector damaged?
SIM pins dirty or distortion?
The resistance to ground
of SIM pins ok?
Can not recognize SIM
Yes
No
Yes
No
Yes
Yes
Page 22
FLY SERVICE SUPPORT
4.5 Display problem
4.6 Receiver no sound
Yes
No
Yes
Yes
Yes
No
Yes
No
No
No
Yes
Display problem
Display white screen?
Display black
screen?
Diplay white line or
others
Upgrade software ok
Upgrade software ok?
Change LCD
Software problem
Resolder or change LCD
ok?
Resolder or change LCD
ok?
Soldering or material
problem.
Change U0100
Yes
No
Yes
No
Yes
Receiver no sound
Upgrade software ok?
Software problem
Change speaker ok?
Speaker problem
Change U0100
Page 23
FLY SERVICE SUPPORT
4.7 Vibrator not work
4.8 Speaker no sound
Vibrator not work
Upgrade software ok?
Software problem
Change vibrator ok?
Vibrator problem
Change U0100
Yes
Yes
No
No
Yes
Speaker no sound
Change Speaker ok?
Upgrade software ok?
Software problem
Speaker problem
Change U0100
Yes
Yes
Yes
No
No
Page 24
FLY SERVICE SUPPORT
4.9 MIC pboblem
4.10 No charging
No charging
USB port appearance ok?
Clean or change USB port
Change Q201OK?
Q201 material problem
Change U0100
Yes
No
Yes
No
Yes
Yes
Yes
Yes
No
No
Yes
No
No
MIC problem
The MIC appearance ok?
MIC soldering ok?
MIC rubber cover broken
or missing?
Change or get another new
rubber cover。
Change MIC OK?
MIC material problem
Change U0100
Resolder MIC get solve
Page 25
FLY SERVICE SUPPORT
4.11 Camera doesn’t work
Camera doesn’t work
Upgrade software ok?
Software problem
Change camera ok?
Resolder camera ok?
Soldering problem
Camera materials problem
Change U0100
Yes
No
Yes
Yes
No
Yes
No
Page 26
FLY SERVICE SUPPORT
Chapter 5 Firmware Upgrading Guide
5.1 Firmware Upgrading
5.1.1 Install USB driver
Insert the download cable and then will find a popup display, follow the steps by red
mark as below。
5.1.2 Find the correct driver as below.
5.1.3 Follow the steps will finish the installation, after finish and open the computer
manager the USB port will display as below.
Page 27
FLY SERVICE SUPPORT
5.1.4 Run “UpgradeDownload.exe”
5.1.5 click this icon “ ”
5.1.6 Select the correct software from the pop-up, then click “open”.
Page 28
FLY SERVICE SUPPORT
5.1.7 Click this icon , a pop-up will be found.
5.1.8 Select the Port and Bautrate in red mark as below, then click OK
Page 29
FLY SERVICE SUPPORT
5.1.9 Click this icon start to download.
5.1.10 After click the tool will display as below.
Page 30
FLY SERVICE SUPPORT
5.1.11 Plug the download cable into the phone, then put the battery into the phone.
5.1.12 Downloading.
5.1.13 Download passed.
Page 31
FLY SERVICE SUPPORT
5.2 IMEI Writing Guide.
How to use “WriteIMEI” to write IMEI
5.2.1 Run “WriteIMEI.exe” , plug the download cable and select port as below
red mark.
5.2.2 Click select the model as below red mark.
Page 32
FLY SERVICE SUPPORT
5.2.3 Enter the IMEI number as below.
5.2.4 Plug the download cable into the phone, then click the icon , next put
the battery into the phone, the tool will display as below.
Page 33
FLY SERVICE SUPPORT
5.2.5 IMEI writing finished.
5.2.6 Write IMEI to another phone.
After finished one phone IMEI writeing, just remove the download cable and use the
same method continue another phone writing.
Loading...