Meizu M6 Note maintenance manual

2017-08-28

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M1721 After Sale Maintenance Manual

（version：V1.0）

Edit by：ShiFeng Huang

Review by：ZhiFeng Zhong

Approved by：ChuanSan Wang

Issue date：Aug 28th,2017 Implementation：Aug 28th, 2017

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Contents

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Chapter 1 Caution of Maintenance

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1. Only authorized technicians can do maintenance and calibration.

2. Make sure that engineers wear antistatic wrist strap repair phones in antistatic station.

3. Make sure that maintenance room is covered with antistatic mat, and the maintenance

table is covered with antistatic material.

4. Make sure that all necessary screws and parts are installed in correct location of phone

after maintenance and adjustment.

5. After maintenance, clean the PCBA.

6. As static electricity is the main reason for electronics damages, engineers shall repair

phones in an anti-static environment and shall take effective antistatic protection
measures.

7. For an occurrence of NG test, engineers should check if the test point is dirty or test point

contact is poor.

8. Check if water penetrates to mainboard. If yes, check all the components to see if there is

oxidation.

9. Make sure that maintenance room is bright and has natural ventilation.

10. Ventilation: When do maintenance or soldering, some equipment can emit hazardous gas.

So the maintenance room should have good natural ventilation. If there are no windows in
maintenance room, the room should be equipped with electric air regenerating equipment.

11. There should be obvious antistatic labels in Electrostatic Sensitive area, such as in

maintenance area and spare part warehouse.

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Chapter 2 M1721 product Introductions

1. M1721 brief introduction

M1721 Appearance view：

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2. Introduction of M1721 main components

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M1721 Back camera assembly

M1721 LCD touch screen assembly

M1721 Battery cover assembly

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M1721 Fingerprint module assembly

M1721 mainboard

M1721 USB board

M1721 Main FPC

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M1721 Side button FPC

M1721 BTB holder

M1721 side button assembly

M1721 USB silicone rubber case

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M1721 Main Mic silicone rubber case M1721 Vice Mic silicone rubber case

M1721 front camera silicone rubber case M1721 light sensor rubber case

M1741 Receiver

M1721 BOX speaker assembly

M1721 Motor M1721 battery M1721 coaxial wire

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M1721 the three choose two SIM card tray

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Front view of mainboard :

M1721 Front camera

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The back view of mainboard：

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3. Technical specification parameter

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Chapter 3 M1721 Functional test and standards

M1721 functional test item and standards
Test condition Tested under photometric 800~2000Lux, using firmware supplied by Meizu as well as test

software

Test Item standards Reference basis

Button test The power key, volume key, and primary key all work. The reaction is not dull and cannot

be show Non corresponding key function

Sensor test All the test item show green, it mean pass; if it show white , it mean skip this

item; if it show red, it mean failed.

Charging test battery state is charging, the external power and charging were green.
headset test headset can be detect, headset button(volume button is work)，Headset sound clear,

no noise、The headset sounds the same、The pause key is work

LCD test no black block,、black dot、home button LED light uniform brightness

Gravity test Turn the screen counter clockwise and display the arrow in four directions

Gyroscope Test Rotate the phone in YXZ order, and the screen corresponds to the coordinate scale

Vibration test Motors can vibrate, it cannot without vibration, it cannot have noise or vibration

so week.

Sensor calibration Flat cellphone，if the interface is show pass.it is normally；if the cellphone

is show red. We should click the accelerate calibration button

Front camera test Preview clear, adjust the normal, clear photos

Back camera test The preview is clear, the calibration is normal, the photos are clear and the focus

is normal

Flash light test White and yellow double color flash lamp is opened normally, brightness is even

Bluetooth test You can find Bluetooth hotspots

WIFI test WIFI hotspots can be searched, you must have more than one hot spot, the

sensitivity value is greater than -60dBm, such as no strong signal, the interface
does not display PASS

Light sensor test When the light sensor is blocked, the screen backlight is turned off and the light

sensor is switched on, and the screen backlight is turned on, and the brightness

of the screen is changed evenly at 20%, 50%, and 80% backlight

Audio test The sound of the ear, the receiver and the horn is normal, and there is no noise.

The recording can be recorded and played, and the sound is normal

Screen lineation test Touch sensitive, lineation normal, it cannot show serration line, broken line,

multi-line when our touch to lineation

Multi touch test Touch the line with at least three points

Finger print test Use the fingerprint test APK, open the first two items of self-test display,

through the finger defense Home key 3rd item display PASS, then release finger，
until to all the test pass

Calling test SIM card can be detected, the sound is clear in call, the signal is stable, Headset

mode / Headset mode / speaker mode can be switching normally, the infrared can

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Serial number

Material name

1

TP+LCM assembly

2

LCD touch screen assembly

3

Front camera silicone sleeve

4

Vice Mic silicone rubber case

5

Receiver

6 front camera

7

Rear camera

8

BB Shield cap

9

Light sensitive silicone rubber
case

10

Side key Vic-plate

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be extinguished screen, it cannot have a single pass and noise, the infrared

no effect

Chapter 4 Exploded view

Chapter 5 Maintenance assembly and materials BOM

1. Maintenance assembly BOM

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11

12

Screw

13

Fingerprint module

14

Fingerprint module silicone
rubber case

15

Fingerprint module holder
assembly

16

Vice-board assembly

17

USB board

18

Main MIC silicone rubber case

19

Main FPC

20

Speaker BOX

21

Screw

22

Motor ground conductive foam

23

coaxial wire

24

Battery

25

Floodlight white Mylar

26

Receiver grounding conductive cloth

27

28

29

BTB holder

30

31

Side button holder

32

SIM tray

33

34

Battery cover assembly

35

Rear camera lens

36

Rear camera lens

37

Screws

38

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1. Block diagram

Chapter 6 Block diagram and PCB Screen Printing

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2. PCB Location number scheme

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Chapter 7 The common fault detect and maintenance

For dysfunctional machines, software problems should be ruled out first.Then step
out troubleshooting hardware
Software upgrade, please follow the following process

Firmware upgrade

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If the phone is flashed to Flyme firmware once again and the current problem still can’t

be solved, Please flash the phone to Engineer firmware (Refer to M1721 Upgrade Guide).

Then use the test software carried by phone to do further tests to troubleshoot.

1. No boot

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2. SIM card no recognizable

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Note：
A.M1721 is Dual SIM card dual standby, include: mobile, Unicom, Telecom, Three

CNC. Flash Flyme firmware.
Please note that please make a distinguish

B. Card 1 support SIM and SD card，Card 2 hot-plugging。

3. Volume button Fault

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4.Touch Screen Fault

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5.LCD display abnormal

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6. Speaker abnormal

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7.Headphone abnormal

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8 Earphone abnormal

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9. Main MIC abnormal

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10. Vice MIC abnormal

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11. Main camera and front camera abnormal

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12. Flash light abnormal

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13. Signal abnormal

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14. Home button abnormal

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15. WIFI / Bluetooth/ GPS abnormal

Antenna is used to emit and receive signal for Wi-Fi, Bluetooth or GPS， When Wi-Fi,

Bluetooth or GPS fault happened, check if it’s an issue of mainboard or an issue of

antenna on battery cover. Below is the process to deal with the problem:

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16.Infrared sensor abnormal

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17.Motor abnormal

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18.Charge abnormal

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19. Note：

If you encounter one of the following problems, change the motherboard

directly when the Flyme firmware is not work.

Fault item Maintenance step 1 Maintenance step 2

Gyroscope Re-flash Flyme Replace Mainboard

Gravity induction Re-flash Flyme Replace Mainboard

Compass Re-flash Flyme Replace Mainboard