RadioMaster TX12MKII Quick Start Guide

Introduction

Thank you for purchasing the RadioMaster TX12MKII 2.4g remote control system. This system is versatile and suitable for both beginners and professionals. To ensure correct and safe use, please read this manual carefully. Due to ongoing improvements in software and hardware, this manual may be updated periodically. Visit our website for the most current information.

The TX12MKII remote control is compatible with all types of fixed-wing aircraft, gliders, helicopters, cars, boats, robotics, multi-rotor aircraft, and any other creations you may build. If you can build it, RadioMaster can control it. The TX12MKII operates using the powerful EdgeTX system. For more information, please visit the provided links.

- The RadioMaster Team

Safety Information

Many remote-control models are equipped with powerful motors and sharp propellers. Exercise caution during operation and maintenance. Ensure power is disconnected and propellers are removed before performing any assembly or maintenance.

Do not operate the TX12MKII remote control system under the following conditions:

• In severe weather or strong windy conditions, such as rain, hail, snow, storms, or electromagnetic environments.
• In any situation where visibility is limited.
• In areas where people, property, high-voltage power lines, public roads, vehicles, or animals may be present.
• If you feel tired or unwell, or are under the influence of drugs or alcohol.
• If the remote control or model appears damaged or not working properly.
• In areas with high 2.4GHz interference or where 2.4GHz radio is prohibited.
• When the radio's battery voltage is too low.
• In areas where local regulations prohibit the use of aviation models.

Manual and Firmware Download

The TX12MKII is pre-installed with factory-approved EdgeTX firmware. To download the latest software manual, please visit the RadioMaster website: https://www.radiomasterrc.com.

To download the latest firmware for your TX12MKII remote control, please visit the EdgeTX website: https://www.Edge-tx.org.

Important!

ANTENNA: Install the provided antenna in the top of the radio BEFORE installing batteries and turning on the radio. DO NOT operate the radio without the antenna installed and the internal RF module powered on. Doing so will damage the internal RF module and will not be covered under warranty.

FIRMWARE: The TX12MKII is pre-installed with the most stable firmware at the factory at the time of release. Please only attempt to update the firmware if you are confident in the process. Incorrect firmware updates may cause the remote control to become inoperable.

Remote Control Overview

The RadioMaster TX12MKII remote control features the following components:

• Top: Antenna, Handle.
• Front Top: TYPE-C USB port.
• Front Left Side: Trainer Port, SE 3 Position switch, SB 3 Position switch, SA Button, S1 Slider Potentiometer, Left Gimbal.
• Front Center: SYS Button, RTN (Return) Button, PAGE> Button, PAGE< Button, TELE Button, Menu Wheel, LCD Screen.
• Front Right Side: SF 3 Position switch, SC 3 Position switch, SD Button, S2 Slider Potentiometer, Right Gimbal, Power Button, MDL (Model) Button, Trim Buttons.
• Bottom: TYPE-C charger port.

Battery Information

The TX12MKII has a built-in USB-C charging function for 3.7v to 4.2v lithium batteries. The charging circuit is suitable for 2x 3.7v Li-ion 18650 or 2x 3.7v LiPo batteries (2s 7.4v Lipo battery pack). The nominal battery voltage is 3.7v, and the maximum charging voltage is 4.2v.

Warning: Do not use LiFE battery packs or 18650 lithium-ion batteries with a nominal voltage of 3.6v to 4.10v. Charging the incorrect type of battery may damage the charger or cause a fire.

Please check the voltage and condition of the battery regularly and never charge it unattended. Always charge in a safe area away from combustible materials. If the remote control gets wet or damaged in any way, do not charge it.

RadioMaster does not assume any responsibility for any adverse consequences caused by the use or misuse of this product.

Model Selection and Protocol Selection

CC2500 Version:

The TX12MKII comes with a CC2500 single-chip multi-protocol internal RF module, compatible with several different protocols. For the latest list of all compatible protocols, please visit https://www.multi-module.org/. New protocols are constantly updated and added to the latest firmware; some may require firmware upgrades.

• Long press the MDL button to enter model settings. Select MULTI in the SETUP page and choose the protocol to be used in the sub-options. The system will automatically turn on the corresponding RF module according to the selected protocol.
• Bind [BND] is used to start the binding process.
• Range [RNG] button can reduce the power to 1/30 to facilitate testing of remote-control distance.

ELRS Version:

TX12MKII ELRS units are equipped with an internal ELRS module, capable of providing 10mW-250mW RF output. In non-extreme circumstances, 100mW output at a 250Hz update rate is recommended, as higher RF output and update rates may significantly reduce battery life and generate excessive heat.

Bind Instructions:

1. Turn off the transmitter.
2. Cycle power to the receiver 3 times; the receiver LED will flash twice, indicating bind mode.
3. Turn on the transmitter, long press the SYS button, and choose the ExpressLRS LUA under the TOOLS menu. Scroll down to [Bind] and press enter.
4. The LED on the receiver should now be solid, indicating successful bind.

Notes

EdgeTX software is very powerful and has a large number of programming and mixing functions. Please download the comprehensive software installation guide from the link below for more detailed instructions: https://www.Edge-tx.org or https://www.radiomasterrc.com.

Specifications

*For the most up-to-date list on supported protocols, please visit https://www.multi-module.org/.

Warranty and Repair

If there is any problem with your remote control hardware, please keep the proof of purchase and contact the retailer where you purchased the TX12MKII. You may also visit our warranty support page: https://www.radiomasterrc.com/contact.

Firmware Update and EdgeTX

For the latest information and firmware updates from the EdgeTX open-source firmware development team, please visit the EdgeTX website: https://www.Edge-tx.org.

Declarations and Compliance

EU Simple Declaration of Conformity: RadioMaster declares the radio equipment TX12 is in compliance with EU directives Directive 2014/53/EU. Full text of the declaration of conformity is available at the following website: www.radiomasterrc.com.

Manufacturer:

ShenZhen RadioMaster Co., Ltd
4th Floor, Yangtian Building, No. 18 Yangtian Road, Xin'an Street, Baoan District, Shenzhen, Guangdong.

FCC ID: 2AV3G-TX12

FCC Information:

This equipment has been tested and found to comply with the limits for Part 15 of the FCC rules. This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Full text of the declaration of conformity is available at the following website: www.radiomasterrc.com.

CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This product contains a radio transmitter with wireless technology which has been tested and found to be compliant with the applicable regulations governing a radio transmitter in the 2.400GHz to 2.4835GHz frequency range.

Antenna Separation Distance: When operating your RadioMaster transmitter, please be sure to maintain a separation distance of at least 20 cm between your body (excluding fingers, hands, wrists, ankles, and feet) and the antenna to meet RF exposure safety requirements as determined by FCC regulations.