Fly FF243 Service Manual

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FF243 SERVICE MANUAL

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TABLE OF CONTENTS 目录

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………………………………………………11

Chapter 6 TROUBLESHOOTING……..………………………………………..…..27

Chapter 7 UPGRADE SOFTWARE INTRODUCTION…………..……………….34

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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.

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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

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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 6 screws Remove front cover

Take out PCBA Use the soldering iron Separate MIC

Remove LCD insulated Use the soldering iron Separate LCD

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Remove 1 screws Remove antenna

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

Remove CAM insulated Use the soldering iron Separate CAM

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1.2.3 ASSEMBLY

welding camera Paste camera insulated

welding SPK Assemble antenna

Assemble 1 screws welding LCD

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Paste LCD insulated welding MIC

Assemble PCBA Assemble front cover

Assemble 6 screws Assemble battery

Assemble battery cover