Fly FF281 Service Manual

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FF281 SERVICE MANUAL

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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 ACTUALL BOARD……………………………………………………….10

SIDE A…………….…………………………………………..……………………………….16

SIDE B……………………….………………………………………………………………...16

Chapter 3CIRCUIT INTRODUCTION………………………………………………11

Chapter 4TROUBLESHOOTING……..………………………………………..…..27

Chapter 5UPGRADE SOFTWARE INTRODUCTION…………..……………….34

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INTRODUCTION

The purpose of this document is to help service workshop technicians to service
products. This servicemanual must be used only by authorized service suppliers. The
content of it is confidential. Please note thatprovides other guidance documents for
service suppliers. Follow these regularly and comply with the giveninstructions. while
every effort has been made to ensure the accuracy of this document, some errors
mayexist. please keep in mind also that this documentation is continuously being
updated and modified, soalways 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 andalignment

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
glassfiber 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 thehigh-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.

Andresolder 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

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Chapter 1

EXPLODED VIEW AND COMPONENT DISPOSAL

1.1 EXPLODED

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1.2 DISASSEMBLY AND ASSEMBLY

1.2.1 SERVICE TOOLS

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Solder wire, soldering paste Wrist grounding strap, Antistatic gloves

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1.2.2 DISASSEMBLY

Remove battery cover Remove battery

Remove outside 7 screws Remove front cover

Use the soldering iron Separate SPK Use the soldering iron Separate LED

Use the soldering iron Separate VIB Use the soldering iron Separate MIC

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take out PCBA Remove insulated

Use the soldering iron Separate Use the soldering iron Separate

LCD camera

1.2.3ASSEMBLY

welding camera welding LCD

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Paste camera insulated Paste LCD insulated

Assemble PCBA welding MIC

welding LED welding Speaker

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welding vibrator Assemble back cover

Assemble 7 screws Assemble battery

Assemble battery cover