Holystone X401H-V2 User manual

FPV REAL-TIME HD IMAGES TRANSMISSION 6-AXIS GYRO QUADCOPTER
MOBILE PHONE APP CONTROL
BAROMETER HOLD ALTITUDE
& A KEY START/LANDING
ITEM NO.X401H-V2
®

6
7
8. Replace the battery..................................................................................................................
9. Charge the battery....................................................................................................................
10. Before the ight....................................................................................................................... 7
11. Take O........................................................................................................................................ 8
12. Trimmer Functions................................................................................................................... 9
13. Operation....................................................................................................................................11
14. Landing/Emergency Stop.....................................................................................................13
15. 3D Flips........................................................................................................................................ 13
16. Headless Mode......................................................................................................................... 14
17. One Key Return......................................................................................................................... 16
18. Altitude Hold Function.......................................................................................................... 16
19. Replace the Motor................................................................................................................... 17
20. FPV Camera Assembly............................................................................................................ 17
21. FPV App Setting........................................................................................................................ 19
22. App Control Functions........................................................................................................... 20
23. Recalibrate the Gyro................................................................................................................ 24
24. Trouble Shooting...................................................................................................................... 24
6
WWW.HOLYSTONE.COM
Content
1. Safety Guidelines...................................................................................................................... 1
2. The LCD Remote Controller................................................................................................... 1
2.1 Sketch of the Remote Controller.................................................................................. 2
2.2 Functions of the Remote Controller............................................................................ 2
3. Battery Assembly...................................................................................................................... 4
4. Four Control Modes Switch................................................................................................... 4
5. Speed Modes Switch...............................................................................................................
6. Major Parts on the Drone......................................................................................................
7. Propeller Guards & Landing Gear ......................................................................................
5
5

Technical parameter of the model
Fuselage Length:298mm
Overall Height: 76mm
Main Rotor Diameter: 135mm
Gross Weight: about 128g
Battery: Li-polymer 7.4V 350mAh
Charging Time: about 40 minutes
Motor: Brushless motor
Introduction
●Quad-rotor design insures more stable and powerful performance and make all kinds of
3D action easier.
●Headless mode and one key return are available.
●New designed structure makes assembly and maintenance easier.
●Adopting 2.4G auto connection technology, scores of model can be played at the same time.
●Equipped with the newest 6-axis gyro control system, this model has the characteristics of
stable flight and easy operation.
●Fully charged battery can support 7.5 minutes steady flight.
●New functions: Altitude-Hold mode, One key Start/Landing and APP control.
Product/spare parts included in this packaging
Description QTY (pc) Description QTY (pc) Description QTY (pc)
Model
Remote control
Manual
Camera
Blades
Landing gear
Protecting frames
Mobile phone holder
1
1
1
1
Screw
Screwdriver
USB charger
4
2
4
1
4
1
1

1
Safety guidelines
●This product is not a toy. It is not applicable for children who are under
14 years old.
●Please read this instruction manual carefully before playing and operate
the product according to the manual.
●The users are in full charge of proper operating the model. The
manufacturer and dealers disclaim all responsibility for the damage
caused by misuse.
●Keep the small accessories away from the kids to avoid accident.
●Keep batteries away from fire or high temperature environment.
●When flying the model, keep it 1~2 meters away from user or others
to avoid injury due to collision.
●Not to decompose or modify the product which may cause malfunction
or accident.
●Fly the model within your eye vision for easy and safe control.
●Adult supervision required when this model is being played by children.
●Only batteries of the same or equivalent type as recommended are to be
used.
●Insert batteries with correct polarity.
●Non-rechargeable batteries are not to be charged; the transmitter need
4 X AA batteries for work.
●Do not mix old and new batteries.
●Rechargeable batteries are to be removed from the toy before being
charged;
●Rechargeable batteries are only to be charged under adult’s supervision;
●Exhausted batteries are to be removed from the toy;
●The supply terminals are not to be short-circuited.
The LCD remote controller
●Adopt microcomputer control remote controller system and 2.4G auto
connection technology, scores of copters can be played at the same time without any
interference.
●Control the function of upward,downward,forward,backward, leftward,rightward,turn left,
turn right and 3D flips & rolling of the copter.
●Throttle control stick can be freely switched according to the player's habit.
Main features of the remote controller

2
Sketch and function switches of the remote controller
Remote Controller(Transmitter)
3. Light switch/
Headless Mode/A Key Back
switch
Light switch
(Short press)
Headless mode
/A Key Back Switch
(Long Press)
1.Power switch
Power switch
12. Power indicator
11. 3D Flips
4. Left stick 9. Right stick
5. Trimmer A
6. Trimmer B 7. Trimmer C
8. Trimmer D
No. Function switch Function description
1.This is the light switch of the model. Press it once to
turn on the light and press it once again to turn off
the light.
2.Headless mode on-off button: Press this button for
about 2 seconds, the remote control will send out 2
beep sounds and letters “ stick mod” will be flashing
on the LCD screen, the indicator light of the model
turns from constant “on” to “flashing”, then, the model
is in the headless mode. Press this button again for
about 2 seconds, the remote control will send out 2
beep sounds and “stick mod” keeps constant “on”,
indicator light of the model turns from flashing to
constant “on”, then, the model exit headless mode.
3.When the model is flying in headless mode, press
A KEY BACK button(Headless Mode Button), the
model will fly Back to the player. Press the A KEY
BACK button again or operate the forward /backward
control stick, the model will exit the A KEY BACK
function.
（Please note that the head of the quadcopter must
face forward and the tail face towards the pilot. The
direction of the pilot should not be changed during the Headless
Mode and A KEY BACK functions. )
2. Mode switch(Long Press)/
A key Start/Landing(Short press)
Mode switch/One
key start / Landing
switch
1
2
3
It controls the power source of the transmitter.Slide
the power switch to the “ON” position, the transmitter
is powered on; slide the power switch to the “OFF”
position, the transmitter is powered off.
10.H/L speed switch
1.Long-press to change the throttle control stick.
2.Short-press to start/land to the ground.

3
3D Flips
Left stick4
5
6
7
8
9
10
11
12
Right stick
Trimmer A
In stick Mode 2 and 4, this button is null.
In stick Mode 1 and 3, it helps to tune the model's
forward and backward flight.
STICK MODE 2:upward/downward,turn left/turn right;
STICK MODE 4:upward/downward,leftward/rightward.
STICK MODE 1:forward/backward,turn left/turn right;
STICK MODE 3:forward/backward,leftward/rightward.
STICK MODE 1: upward/downward,leftward/rightward;
STICK MODE 3: upward/downward, turn left/turn right;
STICK MODE 2: forward/backward,leftward/rightward;
STICK MODE 4: forward/backward,turn left/turn right.
In stick Mode 3 and 4, it helps to tune the model's
sideward flight.
In stick Mode 1 and 2,it helps to tune the model's left
and right direction turning speed.
Trimmer B
No. Function switch Function description
In stick Mode 1 and 3, this button is null.
In stick Mode 2 and 4, it helps to tune the model's
forward and backward flight.
Trimmer D
Power indicator
There are 2 flight modes of the model: low speed and
high speed.
H/L speed switch
In stick Mode 3 and 4, it helps to tune the model's
left and right direction turning speed.
In stick Mode 1 and 2,it helps to tune the model's
sideward flight.
Trimmer C
The indicator light keeps blinking slowly: the transmitter
is not activated.
The indicator light keeps flashing rapidly: the transmitter
is sending out connection signal to the model.
The indicator light keeps on without blinking: the
transmitter is ready for controlling the flight.
Press the 3D Flips button and push the
forward/backward and the leftward/rightward control
stick to the edges to perform the roll actions accordingly.

4
1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA 1.5V AA
1. Unscrew counter clockwise to open the battery compartment cover.
( Pic.1 )
2. Install 4 X AA batteries into the battery compartment according to
the given polarity. ( Pic. 2 )
3. Screw clockwise to close the battery compartment. (Pic. 3)
How to install the battery of remote controller
Pic.1 Pic.2 Pic.3
How to remove and insert batteries.
STICK MODE:1 STICK MODE:2
Forward /
Backward
control
Forward /
Backward
control
Throttle
control Throttle
control
Left/Right
turning
control
Left/Right
turning
control
Leftward/
Rightward
control
Leftward/
Rightward
control
Stick mode selection
4 modes switch
Long-press the mode switch button to choose mode 2/ mode 4/
mode 1/mode 3.

5
STICK MODE:3 STICK MODE:4
Forward /
Backward
control
Forward /
Backward
control
Throttle
control Throttle
control
Left/Right
turning
control
Left/Right
turning
control
Leftward/
Rightward
control
Leftward/
Rightward
control
There are 2 flight speeds available: low speed and high speed.
Player can select the flight speed by pressing the H/L speed button.
Flight speed selection
The model
Light
Motor
OFF/ON
Rotor blade B
Rotor blade B
Rotor blade A
Rotor blade A
Protecting
frames
Landing
gear Camera
Major parts of the model
Low Speed High Speed

6
Protection frame and landing gear installation
1.There are 3 interfaces on each motor cabinet. Insert the frame plugs
into the interfaces and fix it.（Pic.4）
2.Fix the protection frame by screwing clockwise.（Pic.5）
3.There are 4 interfaces at the bottom of the model, insert the
landing gear plugs into the interfaces and fix them. The landing gear
is trapezoid, make sure that the longer waist of the trapezoid point
to the direction of the model’s head.（Pic.6）
Pic.4 Pic.5 Pic.6
Pic.7 Pic.8
Pic.9 Pic.10
How to change new battery for the model
1.Open the battery door by screwing counter-clockwise.(Pic.7)
2.Unplug the battery wire from the power wire plug of the model and
take out the battery.(Pic.8)
3.Connect the wire plug of the new battery and that of the model,
insert the battery into the battery compartment.(Pic.9)
4.Close the battery door and fasten it by screwing clockwise.(Pic.10)

7
Preparation for flight
●Double check the place where the pilot uses the model, make sure that
it is free from the crowd, animals and other barrier.
●Turn on the remote controller and the
power indicator light flashes rapidly and
sends out connectional signal to the drone.
●Slide the throttle control stick up to the top;
then, return the throttle control stick down
to the bottom; It will take about 10 seconds
to finish the signal connection process.
Once signal connection is completed,
the power light will stay "on" without
blinking and the remote controller is
ready for flight.
The remote control
NOTE:Battery should be fully charged before storing.
Turn off the switch, plug the battery to
the power wire which is connected to
the jack-plug. The charging plug of
USB charger is connected to the
three-wire plug on the battery.
During the charging, USB charger
indicator light is on. When the
battery is fully charged, the LED
light of the USB charger turns off.
The charing time lasts about 40 minute.
The method of the Li-Po battery charging
Battery
Charger
(5V 0.5-1A)
Not included
Three wire plug
Plug the power
cord connection
USB

8
Rotor blade B
(Motor 2)
Rotor blade B
(Motor 4)
Rotor blade A
(Motor 1)
Rotor blade A
(Motor 3)
Head of the
model
Tail of the
model
Left Right
●Push up the throttle stick slowly and the model takes off.
●To avoid any misunderstanding, we have defined the orientation of
the model as below: The head of the drone is set right ahead while the
tail face the player. The direction where the head of the copter points
at is named as “forward”, the direction of the tail is named as “backward”.
The direction that the copter flies up to the sky is named as “upward”;
The direction that the copter lands to the ground is named as
“downward”. Player’s left side is named as “left”, player’s right side is
named as “right”. All the directions mentioned in this manual
are subject to the definition above.
●Make sure that the battery (at the bottom of the drone) is well installed
and connected with power wire of drone. The model is OFF.
●Then turn on the drone; the flash LED light will keep flashing quickly,
the gyro of the drone will be in
signal detecting condition. Set
the drone to flat surface, about
4 seconds later, the flash light
will keep constant “ON”. It
indicates that signal connection is
completed and the drone is ready for flight.
The model

9
●The blue LED lights are at the front of the model; The orange LED lights
are at the back of the model.
●When the model is on, checking the rotation direction of the rotor
blades; The front-left and right-back rotor blades(Motor 2, 4) should be
rotating in clockwise direction; the right-front and left-back rotor blades
(Motor 3, 1) should be rotating in counter-clockwise direction.
●If the model keeps flying to one side, it can be corrected by adjusting
the trimmer on the remote control.
Remarks:
●Signal connection between the model and the remote control is required for the
first use.
●Set the connection one by one to avoid signal connection error.
●To better protect the battery, please unplug the battery cable from the power wire
after use.
Trimmer functions
If the model keeps drifting forward,
push down Trimmer A until it gains
balance.
If the model keeps drifting backward,
push up Trimmer A until it gains
balance.
1.If the model keeps drifting forward/backward, users may adjust the
trimmer buttons to keep the model balanced.
STICK MODE 1 or 3:

10
If the model keeps drifting forward,
push down Trimmer D until it gains
balance.
If the model keeps drifting backward,
push up Trimmer D until it gains
balance.
STICK MODE 2 or 4:
STICK MODE 3 or 4:
STICK MODE 1 or 2:
If the model keeps drifting leftward, turn
right of Trimmer B until it gains balance.
2. If the model keeps drifting leftward/rightward, users may adjust the
aileron trimmer buttons to keep the model balanced.
If the model keeps drifting rightward,
turn left of Trimmer B until it gains
balance.
If the model keeps drifting leftward,
turn right of Trimmer C until it gains
balance.
If the model keeps drifting rightward,
turn left of Trimmer C until it gains
balance.

11
STICK MODE 1 or 2:
STICK MODE 3 or 4:
If the model keeps rotating
counterclockwise in the air, turn right of
Trimmer B until it gains balance.
If the model keeps rotating clockwise
in the air, turn left of Trimmer B until it
gains balance.
3. If the model keeps rotating even there is no control signal sent out,
users may adjust the trimmer buttons to keep the model balanced.
If the model keeps rotating
counterclockwise in the air,turn right
of Trimmer C until it gains balance.
If the model keeps rotating clockwise
in the air,turn left of Trimmer C until it
gains balance.
Operating
Upward
Push up the throttle control stick,
the rotation speeds of the mains
rotors are increasing and the
model ascends accordingly.
Push up the throttle control stick, fly the drone to the
expected height and release the throttle control stick.
The drone will be hovering at the current altitude.
Altitude-Hold

Downward
Turn left
Turn right
Turn the left/right turning control
stick to the left,the model will turn
left.
Turn the left/right turning control
stick to the right,the model will
turn right.
Push down the throttle control
stick, the rotation speeds of the
mains rotors are decreasing and
the model descends accordingly.
12
Leftward
flight
Rightward
flight
Turn the sideward flight control
stick to the left side,the model
will fly leftward.
Turn the sideward flight control
stick to the right side,the model
will fly rightward.
Forward
Backward
When the model is flying, push
up the forward/backward control
stick, the model will move forward.
When the model is flying, push
down the forward/backward
control stick, the model will move
backward.

13
3D Flips
Landing and emergency stop
Press the 3D Flips button and push the forward/backward or
the leftward/rightward control stick to the edge to perform the
rolling actions accordingly.
Notes:
We suggest beginner choose a space without obstacles or a soft ground
to fly the quadcopter.
Short-press the one key landing button or push the throttle control
stick to make the drone gently land to the ground. About 2 seconds
later, the drone will thoroughly stop flying.
When the drone is flying lower than 1 meter height above the ground,
and you need to stop the drone urgently, please hold the left control
stick of the remote control to the bottom left and the right control stick
to the bottom right at the same time to cease the flight.

14
Enter into headless mode:
Once signal between the model and the remote control is successfully
connected, press the function button at top right of the remote
control for 2 seconds. The remote control will send out two beep
sounds and there will be letters of “Stick Mod” flashing on the LCD
screen, the model’s indicator light turns from constant ‘ON” to
“flashing”. That indicates that the model enters into Headless Mode.
Exit headless mode:
When the model is in headless mode, press the function button at top
left of the remote control of 2 seconds, the remote control will send
out 3 beeps and the letter “Stick Mod” keeps constant “on”;
the model’s indicator light turns from flashing to constant “on”. That
means the model has exited the headless mode.
When the model is in headless mode, flight direction proof is needed.
Set the head of the model ahead of the player, turn both of two control
sticks to the bottom right for about 2 seconds, the model’s indicator light
will turn from slowly flashing to quick flashing and flight direction proof
is completed. (Recalibration)
Check up on the direction of the model in headless mode：
Headless mode:
（Please note that the head of the quadcopter must face
forward while the tail facing towards the pilot. The
direction of the pilot should not be changed during the
Headless Mode and A KEY BACK functions. )

15
Flight direction control in headless mode:
Turn right the turning
control stick; the model
will turn to the right side
of the player.
Turn left the turning
control stick; the model
will turn to the left side
of the player.
Turn right the sideward
flight control stick, the
model will fly to the right
side of the player in leaning.
Turn left the sideward
flight control stick; the
model will fly to the left
side of player in leaning.
Push down the forward/
backward control stick,
the model will fly backward,
towards the player.
Push up the forward/
backward control stick, the
model will fly forward, away
from player.
●When checking up on the flight direction of the model, set the head of
model right ahead and face forward, the tail face the player; The direction
where the head points at will be constantly considered as “forward”,
it could also be put in this way, the player’s straight front side is defined
as “forward”; the player’s back side is defined as “backward”, the player’s
left side is defined as “left”; the player’s right side is defined as “right”.
●When the model is flying in headless mode, player should keep facing
the forward direction. Otherwise, the model will be out of control. The
model control is shown as below:

16
Schematic diagram of the connection
of the motors and the PCB
It is important that the installation of the PCB and the wire connection
of the motor to the PCB should be connected properly according to the
diagram shown as below.
Altitude-Hold Function
The model is designed with Altitude-Hold function so that the quad
can stay at the current altitude when you release the throttle stick.
A KEY BACK:
When the model is flying in headless mode, press A Key Back button,
the model will fly back to player. Press the A Key Back button again
or operate the forward /backward control stick, the model will exit the
A Key Back function but headless mode is still active.
Remarks:
●Recalibration of the Gyro is needed when the model is ready to fly in
headless mode. When checking up on the flight direction, the model
should be set the head right ahead and the tail face the player; the
player should face the direction where the head of the model points at.
Player should keep the remote contorl face the same direction when
playing the model.
●When the model is flying in headless mode, if the flight direction is
inconsistent with the player’s operating direction or there’s direction
deviation, please stop playing and recalibrate the Gyro.

17
+ - + -
+ -
+ -
1
2
3
4
Camera Interface
Motor 1
Motor 2
Motor 3
Motor 4
1.Motor 1 should be connected with interface 1.
2.Motor 2 should be connected with interface 2.
3.Motor 3 should be connected with interface 3.
4.Motor 4 should be connected with interface 4.
Receiver
board
4.Connect the motor
wire of the new
motor to the power
wire plug.
5.Install the motor
into the main
body of the model.
6.Lock the motor
house with the
screw.
Installed with #C4016 camera, the model can take photos and videos.
Download and install the FPV App with the smart phone to use the
FPV camera functions.
FPV camera #C4016 installation
1.Take out the screws
with a screwdriver
by turning counter
clockwise.
2.Pull out the motor. 3.Unplug the motor
wire from the
power wire plug.
How to replace the motor
Pic.11 Pic.12 Pic.13
Pic.14 Pic.15 Pic.16