TCL 408 Bedienungsanleitung

Service Manual TCL Communication Technology Holdings Ltd.

Rev.: 1.0

TCL 408_T507D1_Service Manual V1.0

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Confidential and proprietary information contained in this repair guide is subject to change without notice.

Distribution, transfer, copy of any content or data in this document without the written permission of TCL is strictly prohibited.

TCL 408

T507D1

Warning:

➢All features, functions, specifications, and other product information provided in this document,

including but not limited to the advantages, aesthetics, price, components, performance, availability

and capacity of the product are subject to change without notice.

➢TCL will not be responsible for any damage to the product, injury or other safety issues caused by the

result of repair by an unauthorized service provider, user repair or unprofessional product repair.

➢Any damage to the product resulted from an attempt to repair the product by any person or 3rd party

other than TCL authorized service provider will not be covered by warranty.

 
 
Service Manual TCL Communication Technology Holdings Ltd. 
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TCL 408_T507D1_Service Manual V1.0 
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Confidential and proprietary information contained in this repair guide is subject to change without notice. 
Distribution, transfer, copy of any content or data in this document without the written permission of TCL is strictly prohibited. 
 
Content
 
1Precautions..............................................................................................................................................3
2General Product Information.................................................................................................................4
3Maintenance preparation .......................................................................................................................5
3.1 Handset with at least 50% battery charges................................................................................... 5 
3.2 Supported Micro SD card and SIM card, 5V2A Charger, Type C 2.0 Cable................................. 5 
3.3 PC with below configurations to do software update by using PC tool......................................... 5 
3.4 Backup the user data before repairing. There are two ways below for your reference................. 5 
4Factory Reset ..........................................................................................................................................6
4.1 Remove Google account before doing factory reset..................................................................... 6 
4.2 Factory Reset................................................................................................................................. 6 
4.3 Recovery mode.............................................................................................................................. 6 
5Software Update......................................................................................................................................8
5.1 Software update by FOTA.............................................................................................................. 8 
5.2 Software update by using Mobile Upgrade tool............................................................................. 8 
6Function Test with Support Centre.....................................................................................................11 
7Troubleshooting....................................................................................................................................13 
7.1 What should I do if my device reboots by itself? ......................................................................... 13 
7.2 What should I do if my device system lags or freezes? .............................................................. 13 
7.3 What should I do if my device cannot charge or charges slowly?............................................... 13 
7.4 What should I do if my device’s battery drains under normal use?............................................. 14 
7.5 What should I do if my device auto powers off?.......................................................................... 14 
7.6 What can I do if my device heats up?.......................................................................................... 14 
7.7 What should I do if my device cannot power on?........................................................................ 15 
8Contact of TCL hotline and service centers ......................................................................................15 
9Disassembly and reassembly..............................................................................................................16 
9.1 Disassembly tools........................................................................................................................ 16 
9.2 Disassembly Process................................................................................................................... 16 
9.3 Reassembly process and tools.................................................................................................... 23 
10 Explode View.........................................................................................................................................27 
11 Split View ...............................................................................................................................................28 

Service Manual TCL Communication Technology Holdings Ltd.

Rev.: 1.0

TCL 408_T507D1_Service Manual V1.0

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Confidential and proprietary information contained in this repair guide is subject to change without notice.

Distribution, transfer, copy of any content or data in this document without the written permission of TCL is strictly prohibited.

1 Precautions

1) Use only demagnetized tools specifically designed for small electronic repairs, most electronic

parts are sensitive to electromagnetic forces.

2) Use only high quality screwdrivers when repairing products. Poor quality screwdrivers can easily

damage the heads of the screws.

3) Always use genuine spare parts. Parts from third party may not function properly or even cause

damage.

4) The parts below require calibration to ensure proper function after repair, please contact TCL

authorized Repair Center.

Sensors (proximity, fingerprint), dual camera, touch screen panel, speaker, motherboard and more.

5) The IPXX degree of protection cannot be guaranteed in the event of repair by the user or by an

unqualified person.

6) If the device suffered from water/liquid damage, you will have the option to have a repair, but this

may exceed the value of the device, depending on level of damage.

7) If you need detailed diagnosis, please contact TCL authorized Repair Center.

8) Do not remove, damage, heat, short circuit, or disassemble the battery. If you need to replace the

battery, camera, screen or motherboard, go to a TCL authorized Repair Center for repair.

9) Before any repair, backup personal information and important data, and then proceed with the

repair.

10) Many semiconductors parts inside the device are sensitive to electrostatic discharges that can

cause unrecoverable damages on the parts. Setup and stay in an Electrostatic Protected Area

(EPA) to avoid electrostatic discharge before opening the device for repair.

11) Before repairing the device, you must be absolutely certain that the device is turned off.

12) Repair the device in a safe/explosion-proof environment. If the device is damaged, emits smoke or

if you smell a burning odor, stop repairing/using the device immediately, use a fire extinguisher or

fire-proof box, and contact TCL.

13) When removing the back cover, be careful not to damage the product, especially the battery.

Recommended safety equipment: Glasses/Gloves/Mask, etc.

14) Before assembly, make sure that there are no screws or foreign objects around the battery.

15) Before assembly, make sure that there are no abnormalities before reattaching the back cover.

Service Manual TCL Communication Technology Holdings Ltd.

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2 General Product Information

Features/Hardware

Description

Design

Dimensions: 164.66x75.4x8.99mm; Weight: 190g

System

Android 12

Processor

Chipset: G25 (MT6762V/CB); CPU: 4xCortex-A53 @2.0GHz+4xCortex-A53 @1.5GHz;

GPU: IMG GE8320 650MHz

Memory & Storage

4GB RAM +64GBROM; Support micro SD cards up to 512GB

Display

6.6" , TFT-IPS

Rear Camera

50 MP rear camera: PDAF, 1/2.55", 0.7um, F1.8, field of view 79.4°, 5P lens.

2 MP depth camera: FF, 1/5 '', 1.75μm, F2.4, field of view 88.8°, 3P lens

Front Camera

8MP front camera: FF, 1/4 '', 1.12μm, F2.0, field of view 77.5°, 4P lens

Battery

5000mAh (standard) Li-ion

Connectivity

2G bands: 850/900/1800/1900

3G bands: B1/2/5/8

4G bands: B1/3/5/7/8/20/28

802.11 a/b/g/n/ac Wi-Fi

Wi-Fi Direct

Mobile hotspot

Bluetooth 5.1, Type-C Cable

Dual SIM+T-Flash card

Sensors

GPS: support BDS/GPS/Glonass/Galileo,with A-GPS

Accelerometer, proximity sensor

Accessories

5V2A Charger, Type C 2.0 Cable, Quick Guide / PSI

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3 Maintenance preparation

3.1 Handset with at least 50% battery charges

3.2 Supported Micro SD card and SIM card, 5V2A Charger, Type C 2.0 Cable

3.3 PC with below configurations to do software update by using PC tool.

⚫CPU: Equal to Pentium 1.6 GHZ or above

⚫RAM: 4GB or above

⚫Hard Disk: 10GB or above

⚫Operation System: Win7/Win8/Win10

⚫USB port

⚫Internet connection with minimum internet speed of 8Mb/s

3.4 Backup the user data before repairing. There are two ways below for your

reference.

Method 1: You need to add your Google account details first. Go to “Settings”-> “System”-> “Backup” ->

Touch “Turn on” in the window which has now opened ->Touch “Back up now.

*App data, SMS text messages, Device settings, Call history, and Contacts will be backed up.

Method 2: You can back up your data to another phone via the “Switch Phone” app, and then recover

data when your phone has been repaired.

Swipe up in the home screen to find the search bar->enter “Switch Phone” ->Transfer the contents by

following the instructions.

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4 Factory Reset

Factory reset will reset your phone to restore it to its factory settings. This will delete all data including

files and downloaded apps. Please backup the user data before doing factory reset.

4.1 Remove Google account before doing factory reset

If Google account is not removed before doing the factory reset, it is not possible to setup the device

with another Google account at initial setup after the factory reset and it will require you to login your

previous signed-in Google account. It is recommended that you log out of the Google account. Follow

the below steps to remove your Google account from the device.

You can go to “Settings”-> “Accounts”->touch your google account-> “REMOVE ACCOUNT”->touch

“REMOVE ACCOUNT”.

4.2 Factory Reset

You can follow the below steps to perform factory reset when the phone is powered on.

Go to main menu -> “Settings”-> “System”-> “Reset”->“Erase all data (factory reset)”->Touch “Erase all

data” in the open window ->“Erase all data”.

4.3 Recovery mode

How to use: Long press “Power” Key + “Volume up” key in power off mode to enter recovery mode.

When to use: When you cannot start your handset or when there is something wrong during switch on

or when cannot charge.

Consumer personal data format: It will format consumer data, and the memory and settings of your

product will return as released from factory.

Service Manual TCL Communication Technology Holdings Ltd.

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Click-through steps：

1) Power off the device, long press “Power” Key

+ “Volume up” key until the LCD lights on;

2) Press “Volume” key to select “Wipe data/factory

reset” and press “Power” key to confirm;

3) Select “Factory data reset” and press “Power”

key to confirm;

4) Select “Reboot system now” and press “Power”

key to confirm.

Service Manual TCL Communication Technology Holdings Ltd.

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5 Software Update

It is suggested to upgrade the handset software to latest version for better performance. Before upgrade,

please remember to backup your data and keep your phone fully charged.

5.1 Software update by FOTA

Firmware-Over-The-Air (“FOTA”) is a way in which the firmware of a mobile device is updated wirelessly

by the device’s manufacturer. Firmware runs in the background without any input from the user, to make

sure that the device’s hardware runs properly. Head to your device’s “Settings”-> “System”-> “System

Update”

5.2 Software update by using Mobile Upgrade tool

1) Download the corresponding SW upgrade tool Mobile_Upgrade_S_Gotu2_v1.3.2 from website:

https://www.tcl.com/global/en/service-support-mobile/tcl-408.html

2) Open the download Mobile_Upgrade_S_Gotu2_v1.3.2 Setup.exe file and choose the language,

install the tool according to the prompt.

3) After finish install the tool, click “Finish” and restart your computer.

4) Open the tool, choose the language, select the model “T507”, click “Start”-> “Next” ->click “Yes”-

>Power off your phone and connect it to computer via USB cable and waiting for loading software

package.

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Service Manual TCL Communication Technology Holdings Ltd.

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Confidential and proprietary information contained in this repair guide is subject to change without notice.

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5) Click “OK” and disconnect your phone from USB cable when the tool pops up the prompt “Please

disconnect your device from the USB cable to proceed”.

6) Click “Upgrade device” and connect your powered off phone to computer, waiting for upgrade.

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