FS-i6S USER MANUAL

1. Safety

1.1 Safety Symbols

Pay close attention to the following symbols and their meanings. Failure to follow these warnings could cause damage, injury or death.

• ⚠️ [Danger] Not following these instructions may lead to serious injuries or death.
• ❗ [Warning] Not following these instructions may lead to major injuries.
• ℹ️ [Attention] Not following these instructions may lead to minor injuries.

1.2 Safety Guide

• ? [Prohibited] Do not use the product at night or in bad weather like rain or thunderstorm. It can cause erratic operation or loss of control.
• ? [Prohibited] Do not use the product when visibility is limited.
• ? [Prohibited] Do not use the product on rain or snow days. Any exposure to moisture (water or snow) may cause erratic operation or loss of control.
• Interference may cause loss of control. To ensure the safety of you and others, do not operate in the following places:
  • Near any site where other radio control activity may occur
  • Near power lines or communication broadcasting antennas
  • Near people or roads
  • On any body of water when passenger boats are present
• ? [Prohibited] Do not use this product when you are tired, uncomfortable, or under the influence of alcohol or drugs. Doing so may cause serious injury to yourself or others.
• The 2.4GHz radio band is limited to line of sight. Always keep your model in sight as a large object can block the RF signal and lead to loss of control.
• Never grip the transmitter antenna during operation. It significantly degrades signal quality and strength and may cause loss of control.
• Do not touch any part of the model that may generate heat during operation, or immediately after use. The engine, motor or speed control, may be very hot and can cause serious burns.
• Misuse of this product may lead to serious injury or death. To ensure the safety of you and your equipment, read this manual and follow the instructions.
• Make sure the product is properly installed in your model. Failure to do so may result in serious injury.
• Make sure to disconnect the receiver battery before turning off the transmitter. Failure to do so may lead to unintended operation and cause an accident.
• Ensure that all motors operate in the correct direction. If not, adjust the direction first.
• Make sure the model flies within a certain distance. Otherwise, it would cause loss of control.

2. Introduction

The FS-i6S transmitter and iA6B receiver constitute a 6 channel 2.4GHz AFHDS 2A digital proportional computerized R/C system. This system supports quadcopter.

2.1 System Features

• AFHDS 2A (Automatic Frequency Hopping Digital System Second Generation): Developed and patented by FLYSKY, it offers superior protection against interference, lower power consumption, and high reliable receiver sensitivity.
• Bidirectional Communication: Capable of sending and receiving data, allowing reception from temperature, altitude, and other sensors, plus servo calibration and i-BUS support.
• Multi-channel Hopping Frequency: Operates within the 2.4055GHz to 2.475GHz band, hopping between 16 channels (32 for Japanese and Korean versions) to reduce interference.
• Omni-directional Gain Antenna: A high-efficiency antenna that reduces interference, uses less power, and maintains a strong connection.
• Unique ID Recognition System: Each transmitter and receiver has a unique ID, ensuring they only communicate with each other after pairing, preventing accidental connections or interference.
• Low Power Consumption: Utilizes highly sensitive low power consumption components, extending battery life significantly compared to standard FM systems.

2.2 Transmitter Overview

The FS-i6S transmitter features several components:

• Device holder mounting point: For securing a mobile device mount.
• Switches (SwA, SwB, SwC, SwD): Can be assigned to auxiliary channels and other functions for quick control.
• Knobs (VrA, VrB): Can be assigned to auxiliary channels.
• Keys (Buttons 1 and 2): Can be assigned to auxiliary channels or timer control.
• Gimbals: Used to control the model's control surfaces (ailerons, flaps, rudder, throttle). Stick modes can be changed in the 'Sticks Mode' menu.
• Lanyard Eye: For attaching a lanyard.
• Power Switch: Used for powering the system on and off.
• USB Port: Supports simulator function, allowing connection to a computer as a HID device.
• PS/2 Port: Enables PPM output.
• Status Indicator: Indicates power and working status (Off: powered off; Blue light: on and working).
• Capacitive touch screen: For interface interaction.
• Battery cover: Access to the battery compartment.

2.3 Receiver Overview

The FS-iA6B receiver includes:

• Antenna: A dual 26mm omnidirectional antenna for signal reception.
• Status Indicator: Indicates power and working status (Off: no power; Lit in red: on and working; Flashing quickly: binding; Flashing slowly: bound transmitter off or signal lost).
• Connectors:
  • PPM/CH1: For PWM output signal or PPM signal.
  • CH2 to CH6: For connecting servos, power, or other parts.
  • B/VCC: For connecting the bind cable or power cable (4.0-8.4V).
  • SERVO: For connecting an i-BUS receiver, outputs i-bus/s.bus signal.
  • SENS: For connecting sensors.

3. Getting Started

Before operation, install the battery and connect the system as instructed.

3.1 Transmitter Battery Installation

• ⚠️ Danger: Only use specified battery (X4 AA batteries).
• ⚠️ Danger: Do not open, disassemble, or attempt to repair the battery.
• ⚠️ Danger: Do not crush/puncture the battery, or short the external contacts.
• ⚠️ Danger: Do not expose to excessive heat or liquids.
• ⚠️ Danger: Do not drop the battery or expose to strong shocks or vibrations.
• ⚠️ Danger: Always store the battery in a cool, dry place.
• ⚠️ Danger: Do not use the battery if damaged.

Steps to install the transmitter battery:

1. Open the battery compartment.
2. Insert 4 fully-charged AA batteries, ensuring good contact.
3. Replace the battery compartment cover.

3.2 Connecting the Receiver and Servos

Connect the receiver and servos as follows:

• Connect the Rudder servo to the appropriate channel on the receiver.
• Connect the Throttle servo to the appropriate channel.
• Connect the Elevator servo to the appropriate channel.
• Connect the Aileron servo to the appropriate channel.
• Connect the Battery to the B/Vcc port on the receiver.
• A Switch can be optionally connected.

4. Operation Instructions

After setup, follow these instructions to operate the system.

4.1 Power On

1. Check that batteries are charged and installed properly, and the receiver is off and correctly installed.
2. Hold the power buttons until the screen lights up.
3. Connect the receiver power supply to the B/VCC port on the receiver.

• ℹ️ Note: Operate with caution to avoid damage or injury.
• ℹ️ Note: Make sure the throttle is at its lowest position and switches are in their up position.

4.2 Binding

The transmitter and receiver are pre-bound. If re-binding is necessary:

1. Turn on the transmitter, select [System], scroll down, and select [RX bind].
2. Connect the bind cable to the B/VCC port of the receiver.
3. Connect power to any other port. The receiver indicator will flash, indicating bind mode.
4. Upon successful binding, the transmitter will exit the menu, and the receiver's LED will stop flashing.
5. Remove the bind and power cables from the receiver, then reconnect the power cable to the B/VCC port.
6. Check servo operation. Restart if necessary.

RF Protocol: AFHDS 2A

Compatible Receivers: X14S, X8B, X6B, iA10B, iA6B, iA6, iA4B, A6, A3, iA8X.

• This binding information applies to the FS-i6S and FS-iA6B receiver. Refer to the FLYSKY website for other receivers.
• Products receive regular updates; visit the website for firmware downloads.

4.3 Pre-use Check

Before operation, perform these checks:

1. Ensure all servos and motors are working as expected.
2. Check operating distance: Have one person hold the transmitter and another move the model away. Mark the distance where control is lost.

• ⚠️ Danger: Stop operation if any abnormal activity is observed.
• ⚠️ Danger: Make sure the model does not go out of range.
• ℹ️ Attention: Sources of interference may affect signal quality.

4.4 Power Off

1. Disconnect the receiver power.
2. Hold the transmitter's power buttons to turn off the transmitter.

• ⚠️ Danger: Make sure to disconnect the receiver power before turning off the transmitter. Failure to do so may lead to damage or serious injury.

5. System Interface

The system interface displays useful information about your model, including timers, fly mode, and TX/RX status.

5.1 Home Screen

The main interface displays the model. Swipe right for servo interface, left for sensors. Buttons allow access to Timers, Battery status, Fly Mode, and Main Menu.

5.2 Timers

This function allows setting up to 2 timers, typically for tracking total flight time. Timers can be assigned to a switch and have three settings:

• Up: Counts up from zero.
• Down: Counts down from a preset time.
• D/U (Down then up): Counts down to zero, then counts up.

Setup involves selecting a mode, optionally setting a preset time, and assigning a switch. If no switch is assigned, timers can be started/stopped manually.

5.3 Fly Mode

This function stores up to 9 different fly modes, activated by a switch. Each mode can store channel settings and be assigned activation switches. Mode names can be customized. Different switch combinations (2-way or 3-way) allow switching between multiple modes.

5.4 TX/RX Battery

This function sets up low battery alarms for the receiver and transmitter. Alarm voltages can be set within a defined low and high voltage range. The system alerts the user via audio and on-screen warnings when voltage drops below the alarm threshold. An internal voltage sensor is indicated by a tick.

5.5 Display Servos

This function displays real-time channel positions and the effects of function changes. A 'channel sweep' function can be activated by holding a finger on the screen, which moves all channels through their range. Ensure motors are disconnected before activating this feature.

5.6 Display Sensors

This function displays connected sensor names, types, and values in real-time. Sensors are assigned an ID starting from 0 (Transmitter Voltage), with subsequent sensors receiving sequential IDs. The list updates automatically when sensors are connected or disconnected.

6. Function Settings

This section details various functions and their uses.

6.1 Reverse

Changes a channel's direction of movement. For example, if a servo moves in the wrong direction, 'Reverse' can correct it. Select 'Nor' (Normal) or 'Rev' (Reverse) for each channel. A reset option is available.

6.2 End Points

Adjusts the range of movement for a channel, limiting servo tilt for easier control. The left box controls low end points, and the right box controls high end points. Values are changed using on-screen arrows.

6.3 Subtrim

Changes the center point of a channel. Useful for correcting model drift. Adjust the center point using on-screen arrows for each channel.

6.4 Trims

Adjusts the center point for the 4 stick axes. Used for fine-tuning control surface alignment. If the throttle is not self-centering, channel 3 cannot be adjusted via trim. Adjustments are made by holding specific keys (Key 1 for right stick, Key 2 for left stick) while moving the stick.

6.5 Rate/Exp.

Creates a response curve for stick inputs and outputs, affecting how the model reacts to stick movements. This function can change the response curve and is available on channels 1, 2, and 4. 'Rate' changes the channel's range, while 'Exp.' (Exponential) alters the curve's sensitivity. A graph visualizes the input vs. output relationship.

6.6 Rate/Exp.Switch

Allows assigning a switch to alternate between Normal/Sport status data within the Rate/Exp. function. Select the desired switch from the menu.

6.7 Throt Curve

Adds a custom curve to the throttle stick's input. The curve has 5 points that can be set to tailor the throttle response. The graph shows stick position versus output. Points on the curve can be adjusted using on-screen icons.

6.8 Aux. Channels

Used to control additional model parts like landing gear or lights. Channels can be selected, and their control type (Nul, VRx, STx, KEY, SWx) can be chosen. The system prevents changes if a channel is used for a fly mode.

6.9 Mix

Creates a mix between two channels, allowing one channel (Master) to control another (Slave). Settings include 'Offset' (adjusts slave's center point), 'Pos.' (positive movement ratio), and 'Neg.' (negative movement ratio). This is useful for functions like coordinating rudder and ailerons.

6.10 Failsafe

Enables pre-setting channel positions for the receiver in case of signal loss. Options include keeping the last received position ('Ch1Off') or moving to a selected position (e.g., 'Ch3 100%'). Failsafe positions can be set for individual channels or all channels simultaneously.

7. System Settings

This chapter covers system functions.

7.1 RX Bind

This function is for binding a transmitter and receiver. Refer to section 4.2 Binding for details.

7.2 Models

Allows selecting and resetting models. Models can be switched using left/right arrow icons. A 'Reset Model' option restores factory defaults, which cannot be undone.

7.3 Trainer mode

Enables guidance flight from a trainer aircraft to a student aircraft, controlled by switches SWA/B/C/D. When trainer mode is on, flight control for CH1-4 is transferred to the student aircraft. Turning off trainer mode restores control. The system supports any standard PPM signal transmitter output as a student aircraft.

7.4 Student mode

Allows setting student mode on/off. When entered, the transmitter turns off RF, and the PS/2 interface outputs PPM signals. CH1-4 outputs default data, bypassing functions like Reverse, End points, etc. Restarting the transmitter automatically exits student mode.

7.5 Output Mode

The system supports multiple output modes:

• PWM: 1-6 channels outputting on receiver pins 1-6.
• PPM: Up to 8 channels output via PPM on receiver channel 1 pin; pins 2-6 have no output.
• i-BUS: Receiver SERVO interface outputs i-BUS signal.
• S.BUS: Receiver SERVO interface outputs S.BUS signal.

Select the desired mode by touching its name; the selected mode will be highlighted.

7.6 Sticks Modes

The system offers 4 stick modes. Changing between modes 2/4 and 1/3 requires swapping the gimbals physically. Refer to section 8.3 Swapping Gimbals for details.

7.7 Throt Mode

Changes the throttle mode (software only). This setting must match the hardware setup (refer to sections 8.1 Throttle Bracket Installation and 8.2 Throttle Spring Installation). Options are 'Self centering' (for both sticks self-centering) and 'Non self centering' (when one stick is non-self-centering).

7.8 Sticks Adjust

Calibrates the sticks and knobs. Move sticks and knobs through their entire range, then center them and touch the back icon to save. The system will not exit if sticks are not centered. Calibration can be checked on the servo display screen.

7.9 Bri./Sound

Controls screen brightness and system volume. Sliders adjust brightness and volume from 0-100%.

7.10 Screen Lock

Allows setting screen lock on/off and duration. The default is on. While locked, physical controls remain active, and certain screen interactions are possible. To unlock, long-press the lock icon (?) for 2 seconds. The Function Menu icon (☰) appears when unlocked.

7.11 Factory Reset

Resets all system settings to default. Confirm the reset by touching 'Y'. All user settings will be lost.

7.12 Firmware Update

Updates the system firmware. Download the latest firmware from https://www.flysky-cn.com/i6s-xiazai. Connect the system via USB, select 'Firmware Update', and follow the on-screen prompts and computer software instructions. The system will restart after the update.

7.13 About FS-i6S

Displays product name, hardware version, firmware release date, and firmware version.

8. DIY Customization

The system can be reconfigured to change joystick placement, knob response, etc.

8.1 Throttle Bracket Installation

Instructions for modifying throttle gimbal self-centering function. These steps are for Mode 2 and detail changes to the right stick. Disassembly of the transmitter is required.

1. Remove grips and 4 screws.
2. Carefully separate front and back covers, minding connecting cables.
3. Loosen assembly screws and remove the plate.
4. Remove the bottom of the seat assembly of the spring hook assembly.
5. Secure the assembly back with screws.
6. Secure the bracket with provided screws. Ensure correct tightness.
7. Assembly process complete.

8.2 Throttle Spring Installation

Instructions for installing the vertical self-centering spring.

1. Disassemble the transmitter.
2. Loosen screws and remove plates.
3. Insert 2 dowels.
4. Position the spring hook assembly and hook the spring.
5. Secure the assembly with screws.
6. Throttle spring installation complete.

8.3 Swapping Gimbals

Instructions for swapping gimbals to change between modes 2/4 and 1/3.

1. Disassemble the transmitter by removing 8 screws.
2. Swap the gimbals, rotate them 180 degrees, align with screw holes, and replace screws. Cables do not need to be disconnected.
3. Replace hand grips and insert batteries.
4. Turn on the transmitter and enter the servo display screen to verify functionality.

8.4 Knob Bracket Installation

Instructions for changing knobs from self-centering to non-self-centering.

1. Disassemble the transmitter and remove screws.
2. Remove PCB screws.
3. Remove the knob from the potentiometer.
4. Install the bracket and secure with screws.
5. Reassemble parts, keeping alignment, and replace all screws.
6. Place the assembled part back and secure.

8.5 Knob Spring Installation

Instructions for installing the vertical self-centering bracket for knobs.

1. Disassemble the transmitter and remove screws.
2. Remove PCB screws.
3. Remove the knob from the potentiometer.
4. Position the spring with ends pinched between the plastic at the bottom.
5. Reassemble parts, keeping alignment, and replace all screws.
6. Place the assembled part back and secure.

8.6 Device Holder

Instructions for fitting a mobile device into the bracket for real-time information reception.

1. Loosen the locking screw anti-clockwise to adjust the bracket.
2. Slide the top part of the phone holder up.
3. Place the phone/device in the middle of the bracket, ensuring it is secure.
4. Slide the bracket back down and tighten the locking screw for a firm grip.
5. Tighten the lock screw on the back of the bracket.

For large-screen mobile devices:

1. Loosen the locking screw anti-clockwise.
2. Move the slide to the highest position and remove marked screws.
3. Center the device in the bracket, ensuring stability.
4. Attach the bracket to the transmitter, ensuring the notch fits over the transmitter's eye and locking screws are secure.
5. Adjust the slider to grip the device firmly and tighten the locking screw.

9. Product Specifications

This section contains the FS-i6S transmitter and FS-iA6B receiver specifications.

9.1 Transmitter Specifications (FS-i6S)

9.2 Receiver Specifications (FS-iA6B)

10. Package Contents

11. Certification

11.1 DoC Declaration

Hereby, Flysky Technology co., ltd declares that the Radio Equipment [FS-i6S] is in compliance with RED 2014/53/EU. The full text of the EU DoC is available at the following internet address: www.flysky-cn.com

11.2 CE Warning

The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other transmitter. End-users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance.

11.3 Appendix 1 FCC Statement

This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

To assure continued compliance, any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This equipment 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.

Caution! The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user authority to operate the equipment.

To set failsafe positions for all channels:

1. Move all your channels to the desired position.
2. Select [All channels] and then [Yes] in the confirmation box.

12. Environmentally friendly disposal

Old electrical appliances must not be disposed of together with the residual waste, but have to be disposed of separately. The disposal at the communal collecting point via private persons is for free. The owner of old appliances is responsible to bring the appliances to these collecting points or to similar collection points. With this little personal effort, you contribute to recycle valuable raw materials and the treatment of toxic substances.

CAUTION RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.