1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your Nuofany FS2A 4CH AFHDS 2A Receiver. This receiver is designed for use with Flysky transmitters supporting the AFHDS 2A protocol, including models such as FS-I6, FS-I6X, FS-I6S, FS-TM8, FS-TM10, and FS-I10. Please read this manual thoroughly before use to ensure proper functionality and safety.
2. Specifications
| Item Name | FS2A 4CH Receiver |
| Channels | 4CH |
| Output Signal | PWM |
| Frequency Range | 2.408-2.475 GHz |
| Band Width | 135 |
| Receiver Sensitivity | -92 DBM |
| 2.4G Mode | AFHDS 2A |
| Failsafe | Yes |
| Supply Voltage | 3.3-10V |
| Distance | 400+ meters |
| Working Current | 20 MA |
| Dimensions | 11 x 25 MM (0.1 x 0.1 x 0.1 inches) |
| Weight | 0.9 grams (0.634 ounces) |
| Supported Transmitters | FS-I6, FS-I6X, FS-I6S, FS-TM8, FS-TM10, FS-I10 (AFHDS 2A protocol) |
3. Package Contents
The package typically includes the following items:
- FS2A 4CH AFHDS 2A Receiver Board
- Pin Headers (for soldering)
- Heat Shrink Tubing (for protection after assembly)

Image 1: The FS2A 4CH AFHDS 2A Receiver board shown with included pin headers. The receiver is a compact circuit board with an antenna wire extending from one end.

Image 2: The FS2A receiver, pin headers, and a piece of clear heat shrink tubing, indicating components for assembly and protection.
4. Setup
4.1 Connections
The FS2A receiver provides 4 PWM output channels. You will need to solder the included pin headers to the receiver board for connecting to your servos or other components. Ensure correct polarity when connecting power and signal wires.

Image 3: A close-up view of the receiver board showing the pinout for channels CH1, CH2, CH3, CH4, along with GND (Ground), VCC (Voltage Common Collector/Power), and PWM (Pulse Width Modulation) labels. Input voltage range is indicated as 3.3-10V.
- CH1-CH4: PWM output channels for connecting servos or ESCs.
- GND: Ground connection.
- VCC: Power input (3.3-10V).
- PWM: This label indicates the type of output signal.
Important: Incorrect wiring can damage the receiver or connected components. Always double-check your connections before applying power.
4.2 Binding Procedure
To establish communication between the receiver and your Flysky AFHDS 2A compatible transmitter, follow these steps:
- Ensure your transmitter is in binding mode (refer to your transmitter's manual for specific instructions).
- Connect power to the FS2A receiver (3.3-10V). The receiver's LED should start flashing, indicating it is ready for binding.
- Press and hold the bind button on the FS2A receiver. The blue LED on the receiver will flash rapidly.
- Release the bind button. If binding is successful, the blue LED will become solid, indicating a successful connection.
- Turn off the receiver, then turn off the transmitter.
- Turn on the transmitter first, then power on the receiver. The receiver should now connect automatically.
If the receiver does not bind, repeat the steps. Ensure your transmitter is set to AFHDS 2A mode.
5. Operating Instructions
5.1 Failsafe Setting
The failsafe function is crucial for safety, ensuring that your model reacts predictably in case of signal loss. To set the failsafe positions:
- Ensure the receiver is successfully bound to your transmitter and receiving a signal (blue LED solid).
- Position all control sticks and switches on your transmitter to the desired failsafe positions (e.g., throttle to zero, control surfaces neutral).
- While the receiver is normally receiving the transmitter signal, long press the bind button on the receiver.
- The blue light on the receiver will flash quickly several times and then become solid. This indicates that the failsafe settings have been successfully stored.
- Test the failsafe by turning off your transmitter while the receiver is powered. The model's controls should move to the set failsafe positions.
It is highly recommended to set and test failsafe before operating any model.
6. Maintenance
To ensure the longevity and reliable performance of your FS2A receiver, follow these maintenance guidelines:
- Protection: After soldering the pin headers, it is recommended to cover the receiver board with the included heat shrink tubing to protect it from dust, moisture, and short circuits.
- Storage: Store the receiver in a dry, cool environment, away from direct sunlight and extreme temperatures.
- Cleaning: If necessary, gently clean the board with a soft, dry brush. Avoid using liquids or solvents.
- Antenna: Ensure the antenna wire is not cut, kinked, or damaged. Position the antenna away from carbon fiber or metal parts for optimal signal reception.
7. Troubleshooting
- Receiver not binding:
- Ensure your transmitter is in AFHDS 2A mode and binding mode.
- Verify the power supply to the receiver is within the 3.3-10V range and correctly connected.
- Confirm the bind button is being pressed correctly and for the appropriate duration.
- Try moving the transmitter closer to the receiver during the binding process.
- No signal after binding:
- Ensure the transmitter is powered on before the receiver.
- Check for any physical damage to the receiver or antenna.
- Verify that the transmitter and receiver are still bound. Re-bind if necessary.
- Failsafe not setting:
- Ensure the receiver has a solid blue LED (bound) before attempting to set failsafe.
- Confirm the bind button is pressed and held until the rapid flashing and then solid blue light sequence occurs.
- Intermittent signal loss:
- Check antenna placement; ensure it is not obstructed or too close to conductive materials.
- Verify the operating distance is within the specified range (400+ meters).
- Check for potential sources of 2.4GHz interference in the operating environment.
8. Warranty and Support
For warranty information or technical support, please refer to the seller or manufacturer's official website. Keep your proof of purchase for any warranty claims.
Manufacturer: Nuofany





