Fly FS403 Service Manual

FLY SERVICE SUPPORT

FS403 SERVICE MANUAL

TABLE OF CONTENTS

INTRODUCTION………………………………………………………………………

Chapter 1 EXPLODED VIEW AND COMPONENT DISPOSAL…………………

EXPLODED DIAGRAM…………………………………………………………….

DISASSEMBLY AND ASSEMBLY ………………………………………………………..

SERVICE TOOLS…………………………………………………………………….
DISASSEMBLE……………………………………………………………………….
ASSEMBLY……………………………………………………………………………

Chapter 2 ACTUALL BOARD……………………………………………………….

SIDE A…………….…………………………………………..……………………………….
SIDE B……………………….………………………………………………………………...

Chapter 3 CIRCUIT INTRODUCTION………………………………………………

Chapter 4 TROUBLESHOOTING……..………………………………………..…..

Chapter 5 UPGRADE SOFTWARE INTRODUCTION…………..……………….

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.

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

FLY SERVICE SUPPORT

Chapter 1

EXPLODED VIEW AND COMPONENT DISPOSAL

1.1 EXPLODED

1.2 DISASSEMBLY AND ASSEMBLY

1.2.1 SERVICE TOOLS

FLY SERVICE SUPPORT

FLY SERVICE SUPPORT

Solder wire, soldering paste Wrist grounding strap, Antistatic gloves

FLY SERVICE SUPPORT

1.2.2 DISASSEMBLY

Remove battery cover Remove battery

Remove 6 screws Remove back cover

Remove 3 inside screws Take out PCBA

FLY SERVICE SUPPORT

1.2.3 Assembly

Assemble PCBA Assemble 3 inside screws

Assemble back cover Assemble 6 screws

Assemble battery Assemble back cover

Chapter 2

ACTUALL BOARD

SIDE A AND

FLY SERVICE SUPPORT

Chapter 3 Electric introduction

3.1 Main CPU introduction

3.1.1 Baseband-A

FLY SERVICE SUPPORT

3.1.2 Baseband-B

FLY SERVICE SUPPORT

3.2 Baseband RF

3.3 RF PA