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5. Check that the right and left landing gear rest at the same

tilt angle.

IV. Checking the Motors

1. Detach the propellers and start the motors. Carefully

examine the edges of each rotor and confirm that it is

perfectly centered on its motor. Check for any abnormal

or excessive vibration. Listen carefully for any abnormal

noise, which may be a sign that the bearings are worn. If

any problems are detected, contact DJI Support to order

replacement motors.

V. Checking the Propellers

1. Check the propellers. If there is any bending, breakage or

cracking on a propeller, do not use it. Replace worn-out

propellers and propeller bases promptly.

2. Check that when you attach each propeller, the propeller

locks (clicks) into place correctly. For each propeller, use

one hand to prevent the motor rotor from rotating and use

your other hand to try to rotate the propeller. If the propeller

rotates, the propeller base is loose and needs replacing.

3. Attach the propellers to the motors, place the aircraft on

the ground and power it on. Stand 3.3 ft (1 m) away from

the aircraft and observe the rotating propellers. If you can

see two distinct propeller outline layers, when looking

at a spinning propeller from the side, that propeller is

damaged and should not be used.

VI. Checking the Flight Control System

1. In the DJI GO 4 app, review the IMU bias and compass

interference readings. Even if the IMU biases are below the

warning thresholds, an IMU calibration can be performed

to remove small biases and improve Flight Control System

performance. The IMU calibration procedure involves

holding the aircraft in five different positions. In each

position, the aircraft must be held very stably, otherwise the

calibration may be inaccurate. The Carrying Case can be

used to support the aircraft in positions that require support.

Perform a compass calibration if necessary.

2. The flight control module fan is located at the bottom of the

flight control module, just above the Gimbal Connector.

Power on the aircraft and listen for any abnormal noise

or vibration from the fan. If any irregularity is detected,

contact DJI Support.

3. Ensure that there are no obstacles on or around the

GPS module. Remove any obstacles (such as tape with

conductive material) that might affect or block the signal.

VII. Checking the Control and Video Transmission System

1. Make sure the aircraft antennas located on the outside of the

four landing gear feet are not covered with stickers or tape.

2. Check the remote controller antennas for damage.

3. Check the remote controller neck strap for damage or

wear and replace if necessary.

VIII. Checking the Gimbal and Camera

1. The Gimbal Connector is a particularly vulnerable

component. If the gimbal fails to initialize when turned on,

fails to work after initialization, or fails to transmit video to

the app (while OSD data is displayed), check the metal

contacts on the two halves of the gimbal connector. If

there is any dirt, rub the contacts clean with an eraser. If

any contact is scratched or oxidized, contact DJI Support

to arrange repair/replacement of the Gimbal Connector.

2. If the gimbal is performing stably during normal operation,

there is no need to check it. If its performance has

deteriorated, contact DJI Support to arrange repair.

3. Check the camera, especially the lens. If moisture ingress

has occurred, use desiccant or a moisture-absorbing dry

box to remove the moisture.

4. The Gimbal Connector's rubber damping balls are

consumable items. It is recommended that they are

replaced after 120 flights or 40 flight hours and they also

need to be replaced in the following circumstances:

A ball has been pierced and the white damping grease

has leaked out.

A ball does not return to a spherical shape when

uninstalled.

The rubber has aged and a ball has lost elasticity.

A ball was subjected to excessive forces during a crash

or other incident.

IX. Checking the Vision System

1. Check the camera lens. If any dirt or residue is detected,

gently clean the lens.

2. Check for and remove objects that might block the sensors.

3. Ensure that the Upward Infrared Sensors are securely

installed on the aircraft and are not blocked by stickers or

tape.

4. Detach the propellers and turn on the aircraft. Hold the

aircraft 1 to 2 m above a surface with rich patterns, under

good lighting conditions. Change the Flight Mode switch to

P-mode on the controller and check the DJI GO 4 app. If

the app displays an altitude value and indicates that P-OPTI

mode is active, the Vision System should function normally.

5. If a Vision System abnormality is displayed in the app,

connect to DJI Assistant 2 and recalibrate the Vision System.

After-Sales Information

Visit the following pages to learn more about after-sales service

policies, repair services and support:

After-sales Service Policies: http://www.dji.com/service/policy

Paid Repair Service: http://www.dji.com/service/repair

DJI Support: http://www.dji.com/support