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Service Manual
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 issue 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 3
other than TCL authorized service provider will not be covered by warranty.
Rev.: 1.0
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 20 R 5G
T767H
TCL 20 R 5G T767H Service Manual V1.0
TCL Communication Technology Holdings Ltd.
rd
party
Page: 1/19
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Table of Contents
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Summarization of Contents
Maintenance preparation
Handset with at least 50% battery charges
Ensure device has over 50% battery charge before performing maintenance.
Supported SD card and SIM card, 5V2A Charger, Type-C USB Cable
List of supported accessories and cables for maintenance.
PC with below configurations to do software update by using PC tool
PC system requirements for software updates via PC tool.
Backup the user data before repairing
Instructions for backing up user data before repair.
Factory Reset
Remove Google account before doing factory reset
Steps to remove Google account before factory reset.
Recovery mode
How to enter and use the device's recovery mode.
Software Update
Software update by FOTA
Method for updating software wirelessly over the air.
Software update by using Mobile Upgrade tool
Process for updating software using a PC tool.
Troubleshooting
What should I do if my device reboots by itself?
Solutions for unexpected device reboots.
What should I do if my device system lags or freezes?
Steps to resolve device lagging or freezing issues.
What should I do if my device cannot charge or charges slowly?
Troubleshooting steps for charging problems.
What should I do if my fingerprint unlock function works slowly or fails?
Solutions for slow or failing fingerprint unlock.
What should I do if my device's battery drains under normal use?
Tips to address rapid battery drain.
What should I do if my device auto powers off?
How to fix issues with the device automatically powering off.
What can I do if my device heats up?
Guidance on managing device overheating.
What should I do if my device cannot power on?
Steps to resolve issues with the device not powering on.
Need help?
Do you have a question about the T767H and is the answer not in the manual?
Questions and answers