1. Introduction
The Radiolink RC4GS V3 is a 5-channel 2.4GHz FHSS (Frequency Hopping Spread Spectrum) radio transmitter designed for a wide range of RC vehicles, including cars and boats. It comes paired with the R6FG 6-channel receiver, which features a built-in gyroscope for enhanced stability and control. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your RC4GS V3 system.
Figure 1: Radiolink RC4GS V3 Transmitter and R6FG Receiver
1.1 Key Features
- 5-Channel Transmitter with 2.4GHz FHSS Technology
- R6FG 6-Channel Receiver with Built-in Gyroscope
- 30 Models Memory Storage
- Dual Rate (D/R) Functionality
- End Point Adjustment (EPA)
- Programmable Mix Control
- Timer Function for Training and Racing
- Cruise Control (Throttle Lock)
- DSC Port for Simulator and TBS Crossfire Module (requires separate purchase)
- Firmware Upgradeable via USB
- Superior Anti-interference Ability
Figure 2: RC4GS V3 Feature Overview
2. Setup
2.1 Transmitter Power Supply
The RC4GS V3 transmitter can be powered by either 6 AA batteries or a 2S-4S LiPo battery. Batteries are not included.
- Open the battery compartment cover on the bottom of the transmitter.
- Insert 6 AA batteries, ensuring correct polarity, or connect a compatible 2S-4S LiPo battery to the JST connector.
- Close the battery compartment cover.
Figure 3: Transmitter Battery Compartment and Power Options
2.2 Receiver Connection (R6FG)
Connect the R6FG receiver to your RC vehicle's Electronic Speed Controller (ESC) and servos as follows:
- CH1 (Steering): Connect your steering servo to Channel 1.
- CH2 (Throttle): Connect your ESC (for motor control) to Channel 2.
- CH3-CH6 (AUX): Connect auxiliary components like lights, winches, or other servos to Channels 3 through 6 as needed.
- Power: The receiver is typically powered via the ESC connected to CH2. Ensure the VCC and GND pins are correctly aligned.
- Antenna: Position the receiver antenna away from metal parts and other electronics for optimal signal reception.
Figure 4: R6FG Receiver Wiring Diagram
2.3 Binding the Transmitter and Receiver
To establish communication between the transmitter and receiver:
- Turn on the transmitter.
- Press and hold the 'Bind Button' on the R6FG receiver while powering it on. The Binding LED (Green) on the receiver should flash rapidly.
- Release the bind button. The Binding LED should remain solid green, indicating a successful bind.
- If the LED does not turn solid, repeat the process.
2.4 Voltage Telemetry Connection (Optional)
For real-time battery voltage monitoring, connect the voltage telemetry cable (if included or purchased separately) to your battery and the R7FG receiver (if using R7FG, R6FG does not support telemetry). The diagram below illustrates the connection for an R7FG receiver.
Figure 5: Voltage Telemetry Cable Wiring (R7FG shown)
3. Operating Instructions
3.1 Basic Controls
- Steering Wheel (CH1): Controls the left/right direction of your vehicle.
- Throttle Trigger (CH2): Controls forward/reverse movement and speed. Pull for forward, push for reverse.
- Auxiliary Channels (CH3-CH5): Can be customized to rotary switches or tact switches for various functions.
Figure 6: Transmitter Controls and Assignments
3.2 Advanced Functions
The RC4GS V3 offers several advanced features for fine-tuning your vehicle's performance:
- Dual Rate (D/R) and EPA: Adjust the maximum travel of your steering and throttle servos. The RC4GS V3 supports one-key switching between different servo ranges for D/R and EPA. This allows adaptation to various models, terrains, and driving habits.
- Mix Control: Program two channels to be mixed, allowing for complex control schemes. For example, a dual programmable mix can be used for a timber truck to mix front and rear wheel steering, reducing the turning radius. This feature can be activated with a single switch.
- Timer Function: Utilize the built-in timer for training and racing. This helps in tracking lap times and overall race results, aiding in skill improvement.
- Cruise Control (Throttle Lock): Maintain a constant speed without continuously holding the throttle trigger.
- Simulator Support: The DSC port functions as a simulator port by default. This allows you to connect your transmitter to a PC for practice with RC simulators (dongle and TBS cable sold separately).
- TBS Crossfire Support: The DSC port can also be used to connect a TBS Crossfire module for extended range and robust signal (module sold separately).
- Fail-Safe Settings: Configure fail-safe values for all channels. In case of signal loss, the receiver will automatically move servos to pre-set positions (e.g., throttle to neutral, steering straight) to prevent runaway vehicles.
Figure 7: Advanced Features Overview
Figure 8: Dual Rate Functionality
3.3 Gyroscope Function (R6FG Receiver)
The R6FG receiver features a built-in gyroscope to help stabilize your vehicle, especially in challenging conditions or at high speeds. The Gyro Function LED (Red) indicates its status.
Figure 9: Gyroscope Functionality
4. Maintenance
4.1 Firmware Update
The RC4GS V3 transmitter's firmware can be updated via the USB port. Connect the transmitter to a computer using a USB cable. Refer to the Radiolink official website for the latest firmware and update instructions.
Figure 10: USB Port for Firmware Upgrade
4.2 Cleaning and Storage
- Keep the transmitter and receiver clean and free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning.
- Avoid exposing the components to extreme temperatures or direct sunlight.
- When storing for extended periods, remove batteries from the transmitter to prevent leakage.
5. Troubleshooting
5.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to transmitter | Dead or incorrectly installed batteries | Replace batteries or check polarity. Ensure LiPo is charged. |
| No control/response from vehicle | Not bound, receiver not powered, incorrect connections | Perform binding procedure. Check receiver power and all wiring connections. |
| Vehicle behaves erratically (e.g., twitching) | Interference, loose connections, incorrect gyro settings | Check for sources of interference. Secure all connections. Adjust gyroscope sensitivity. |
| Transmitter displays 'RSSI Low Alarm' | Weak signal, too far from receiver | Move closer to the vehicle. Check receiver antenna placement. |
| Transmitter displays 'EXT low Power!' or 'TX low Power!!' | Transmitter battery low | Recharge or replace transmitter batteries immediately. |
Figure 11: Transmitter Alarm Displays
6. Specifications
6.1 RC4GS V3 Transmitter
- Channels: 5
- Frequency: 2.4GHz FHSS
- Model Memory: 30
- Control Distance: Approximately 400 meters (1300 feet)
- Power Supply: 6x AA batteries or 2S-4S LiPo battery (not included)
- Material: Composite Material
- Recommended Age: 14+ years
- Features: Dual Rate, EPA, Mix Control, Timer, Cruise Control, DSC Port (Simulator/TBS Crossfire), Firmware Update
6.2 R6FG Receiver
- Channels: 6
- Gyro Support: Yes (Built-in)
- Telemetry Support: No
- Operating Voltage: 3.0V-12V DC
- Control Distance: Approximately 400 meters
- Dimensions: 3.5 x 1.8 x 1.4 cm
- Weight: 6g
- Signal Output: PWM
- Compatible Radios: Radiolink RC6GS V3/RC4GS V3/RC6GS V2/RC4GS V2/RC6GS/RC4GS/T8S/T8FB
- Model Application: Most RC Cars & Boats (e.g., rock crawler, nitro, monster truck, drifting car, twin-engine tank, gasoline car & boat, 4-wheel steering car)
Figure 12: Receiver Specifications Comparison
7. User Tips
- Always Perform a Range Check: Before operating your RC vehicle, especially in a new location, perform a range check to ensure reliable signal reception.
- Understand Fail-Safe: Properly configure your fail-safe settings to prevent your vehicle from running away or causing damage in case of signal loss.
- Practice with a Simulator: If new to RC, use the simulator function to practice driving and control without risking damage to your physical model.
- Keep Batteries Charged: Always ensure both your transmitter and vehicle batteries are adequately charged before use to avoid unexpected power loss during operation.
- Antenna Placement: Ensure the receiver antenna is positioned correctly and not obstructed by carbon fiber or metal parts for optimal range and signal quality.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the official Radiolink customer support or the retailer from whom you purchased the product. Keep your proof of purchase for warranty claims.
