TCL MT31-AP, Service Manual

Page: 26 / 47

Test and Alignment Specification for MT5331 Series (v0 91)
Page 21 of 26
 Go to “
Factory menu

Other

Update CI+ Credential

Update From USB
“ and then press RCU
“
OK/
►” key
The
“Valid” flag should now be enabled (turns to “Yes”), “Custom Code” should displayed “TCL” and
“Serial Num.” field should updated with Key number.

Remove USB stick
Note: If unfortunately the process failed, you may need to download new CI key and repeat operation again.
Appendix
⑺
“
How to upgrade CI Key using MTK tool
”

Connect UART interface to suitable manufacturing TV input connector

Launch MTK tool with version above v2.48-05
 Click on “Browse” button and select "All files(*.*)" filter, then browse any “
*.key
” file like below snapshot

Modify "Custom Burning Address:" to "790000", then start to upgrade

Restart TV

Go to
“
Factory menu

Other

Update CI+ Credential

Update CI+ Credential
”, then press
RCU ”
OK/
►” key. The “Valid” flag should now be enabled (turns to “Yes”), “Custom Code” should display
“TCL” and corresponding “Serial Number” should be updated as well like onto below snapshot:

Remove UART connection
Note: If unfortunately the process failed, you may need to download new CI key and repeat operation again.
Appendix
⑻
“How to upgrade MAC address using USB”
MAC for USB upgrade method as following
：

Create a new folder(name: _MAC) in the USB disk root directory.

Put the MAC file into the root directory of the USB disk

Inster the USB disk into TV,in the factory menu,selected other->Update MAC address->Update
From USB