TCL 40SE User manual

Service Manual TCL Communication Technology Holdings Ltd.
Rev.: 1.0
TCL 40 SE_T610K_K2_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 40 SE
T610K/K2
Dark Gray
Twilight Purple
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.
Rev.: 1.0
TCL 40 SE_T610K_K2_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, 5V3A Charger, Type-C 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 ..........................................................................................................................................5
4.1 Remove Google account before doing factory reset..................................................................... 5
4.2 Factory Reset................................................................................................................................. 5
4.3 Recovery mode.............................................................................................................................. 6
5Software Update......................................................................................................................................7
5.1 Software update by FOTA.............................................................................................................. 7
5.2 Software update by using Mobile Upgrade tool............................................................................. 7
6Function Test with Support Centre.....................................................................................................10
7Troubleshooting....................................................................................................................................12
7.1 What should I do if my device reboots by itself? ......................................................................... 12
7.2 What should I do if my device system lags or freezes? .............................................................. 12
7.3 What should I do if my device cannot charge or charges slowly?............................................... 12
7.4What should I do if my fingerprint unlock function works slowly or fails?.................................... 13
7.5 What should I do if my device’s battery drains under normal use?............................................. 13
7.6 What should I do if my device auto powers off?.......................................................................... 13
7.7 What can I do if my device heats up?.......................................................................................... 14
7.8 What should I do if my device cannot power on?........................................................................ 14
8Contact of TCL hotline and service centers ......................................................................................14
9Disassembly and reassembly..............................................................................................................15
9.1 Disassembly tools........................................................................................................................ 15
9.2 Disassembly Process................................................................................................................... 15
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 40 SE_T610K_K2_Service Manual V1.0
Page: 3/32
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 TCLauthorized 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 TCLauthorized 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: 167.91*76.5*8.45mm; Weight: 190g
System
TCL UI 5.0; Android 13
Processor
Chipset: MTK G37; CPU: 4 x Cortex-A53 @ 2.3GHz+4 x Cortex-A53 @ 1.8GHz; GPU:
IMG GE8320 680MHz
Memory & Storage
4GB RAM +128GBROM (for T610K), 6GB RAM +256GBROM (for T610K2); Support
micro SD cards up to 1TB
Display
6.75 inch, TFT-IPS, HD+ 1600x720 pixels, 90Hz refresh rate
Rear Camera
50M (main) +2M (Depth)+2M (Macro): PDAF + FF + FF, 1/2.55+1/5+1/5,
0.7um+1.75um+1.75um, F1.8+F2.4+F2.4, field of view 79.4°+88.8°+88.8°, 5P+3P+3P.
Front Camera
8MP front camera: FF, 1/4", 1.12um, F2.0, field of view 80.2°, 4P lens
Battery
5010mAh (standard) Li-ion
Connectivity
2G bands: GSM 850/900/1800/1900
3G bands: UMTS B1/2/5/8
4G bands: LTE B1/3/5/7/8/13/20/28/38/40/41(2496-2690MHz)
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/Gaileo, with A-GPS
Accelerometer, proximity sensor, Light Sensor, Fingerprint module
Accessories
5V3A Charger, Type-C cable, Quick Guide / PSI, SIM tooling pin

Service Manual TCL Communication Technology Holdings Ltd.
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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, 5V3A Charger, Type-C 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.
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.
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

Service Manual TCL Communication Technology Holdings Ltd.
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TCL 40 SE_T610K_K2_Service Manual V1.0
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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.
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”->“Updates”
or “System Update”
5.2 Software update by using Mobile Upgrade tool
1) Download the corresponding SW upgrade tool Mobile_Upgrade_S_Gotu2_v1.3.4 from website:
https://www.tcl.com/global/en/support-mobile/model.TCL%2B40%2BSE.html
2) Open the download Mobile_Upgrade_S_Gotu2_v1.3.4 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 “T610”, 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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Distribution, transfer, copy of any content or data in this document without the written permission of TCL is strictly prohibited.
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.

Service Manual TCL Communication Technology Holdings Ltd.
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7) Upgrade successfully.
6 Function Test with Support Centre
1) Check that the Nano SD card are inserted correctly.
2) Power on the product to launch the auto test.
3) If the product displays “input NCK code”, this means the software is Network locked or SIM locked,
and can only be used with dedicated SIM card hence use the relevant SIM card or enter the phone
NCK code if available.
4) Open the “Support Centre” app->Click “AGREE”-> “Hardware diagnosis”-> “START TESTING” -
>Authorize the permissions required for diagnostics->Follow the instructions to test.