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2022 Moving Head Light Common Faults and Solutions Update Version

2022 Moving Head Light Common Faults and Solutions Update Version

The usual common faults of the moving head lights are the lighting equipment not powered on as a whole, the light bulb out of control, the light bulb not lit or suddenly turned off, etc. A sudden failure of stage lighting fixtures often causes great embarrassment and inconvenience to the stage lighting performance scene.

One of the common faults is that the bulb of the moving head light does not light up. How to solve the problem?
The first step is to open the tail of the lamp body to check whether the bulb is white or black. If the above two phenomena occur, please try to replace the bulb and try again.Open the two shells of the lamp body, the trigger is installed on the lamp post, and check whether the wiring of the trigger is black, If so, replace the trigger.

Common fault 2: The bulb of the moving head light is on and off when it is on. 
1. Check whether the light bulb is white, black or swollen. Please replace the light bulb when any of the above conditions occur to avoid damage to the stage lighting equipment.
2. Check whether the fans near the two sides of the bulb are running normally. if any problem, please replace the fans immediately.
3. Please open the two shells, and there is a white temperature control on the layer of the gobo wheel and the color wheel to see if it is burned out.
4. Open the two shells of the lamp body, and the heat dissipation window on the tail of the bulb will block the air outlet for a long time. If the radiator window is full of dust, please clean it immediately (the best cleaning time for this radiator window is once a month for the best effect).

Common fault 3: The moving head light is not powered on as a whole.
1. First check if there is any problem with the power cable.
2. Check whether the fuse of the power socket is blown.
3. Open the bottom panel of the lamp, check whether the ballast is powered on, and whether the internal switch wiring shows signs of falling off.
4. Open the two shells of the lamp body, and check whether the temperature control is faulty at the position close to the bulb.

Common fault 4: The moving head light bulbs blow up.
1. Check the voltage first, if it exceeds, there will be the possibility of bubbles (so stage lighting equipment manufacturers usually recommend that a voltage stabilizer should be installed in each place);
2. Is there any quality problem with the bulb?
3. If the circuit is not in good contact, there will be instant power failure.
4. The bulb electrode terminal is not tight and uncomfortable.
5. Ballast coil short circuit, etc.
6. If none of the above 5 methods are available, then it should be possible that the ballast is faulty.

Common fault 5: The moving head light appears out of step.
1. If the moving head light is out of step, please reprogram the program and try again.
2. If it still doesn't work, it may be that a certain function of the motor or a certain IC of the motherboard is burned out.

Common fault 6: The moving head light is out of control.
1. Check whether the address code is logarithmic. If the address code is correct but not controlled, check whether the three cores of the signal line are connected incorrectly. And check whether the connection between powercon socket in any condition, such as poor contact.
2. If the address code is correct and there is no problem with the side connection of the signal line, the DMX light at the address code will flash normally. If it does not flash, there is a connection failure.
3. Use the same lighting console to connect another lamp separately and try it. If there is no problem, it means that the main board or display board of the uncontrolled lamp is faulty.

Common fault 7: The moving head light broken belt.
1. If the X or Y axis of the lamp body does not respond, but the console and other lamps are running normally, the belt may be disconnected.
2. If the X-axis does not move, but the Y-axis moves, or the X-axis moves but the Y-axis does not move, the belt may be broken.
3. If there are any of the above signs, you can move X/Y with your hands when the lights are turned off, and feel if there is a belt moving.

Common fault 8: The light bulb turns off after a while
1. The bulb is aging or of poor quality
2. The fan does not rotate or there is a lot of dust
3. Temperature control resistance aging
4. The terminals are aging, etc.

Common fault 9: The channel does not turn or it is stuck.
1 Motor cable segment
2. The driver IC is burnt
3. Desoldering of motor lead terminals
4. Poor contact at both ends of the cable
5. Mainboard IC virtual connection
6. Lubrication

Common fault 10: no response to boot
1. Check whether the voltage is 220V or 110V;
2. Check the insurance in the lamps;
3. Check whether the switching power supply has output voltage (32V, 12V, 5V);
4. Check whether the circuit board is working normally (indicator light): red is the power work indicator; yellow is the CPU work indicator; green is the signal work indicator.

Common fault 11: Boot can be reset but no light
1. Check the quality of the bulb and whether the bulb is installed correctly.
2. Whether the switching power supply has a 12V output, and whether there is a 12V voltage at the lighting point in the case of a short circuit of the motherboard temperature control.
3. Whether the temperature control switch has an open circuit phenomenon.
4. Whether the output voltage of the electronic rectifier is about 380V at the moment of lighting.
5. Whether the electronic trigger is damaged (replace the electronic trigger test light).

Common fault 12: After starting up and working for a period of time, the lamp automatically resets.
1. The output of the switching power supply is unstable.
2. The wire in the line is loose or the wire is not pressed tightly, resulting in poor contact and automatic reset.

Common fault 13: Bulbs are automatically extinguished:.
1. After the bulb is defoamed, it will automatically light up again after a period of time. Check whether the cooling system is working properly. If the cooling system fails, it will automatically light up.
2. After the bulb is defoamed, it cannot be automatically turned on, which is the problem of the bulb itself. The surface of the bulb sphere is white and the interior is black, and the phenomenon of defoaming will occur after a period of bright bulbs (the life of the bulb will end).
3. The lamp will automatically protect the bubbles when there is no control signal for a long time, and it will automatically light up after the signal is turned on.

Common fault 14: The light bulb is on, the motor reset is normal, but it is not controlled:.
1. Check the connection signal (DMX).
2. Check the lamp address code.
3. Check whether the signal IC (75176) is damaged.

Common fault 15: The fuse or power supply is burned when the machine is turned on.
1. Check whether the rectifier is short-circuited and the inrush current is too large.
2. Whether the light bulb is connected to the ground.
3. Whether the high voltage inside the lamp is short-circuited to the ground (referring to the case of a ground wire).

Common fault 16: The bulb does not trigger properly, cannot be turned on or the brightness is not enough
1. The working voltage of the lamps is too low.
2. The trigger is faulty (replacement).
3. The service life of the bulb has expired (replacement).
4. The electronic rectifier is damaged.

Common fault 17: The bulb can be on but cannot be extinguished
1. Whether the menu is set to "electronic lighting off".
2. Whether the temperature control is short-circuited to ground.
3. Whether the rectifier is damaged.

Common fault 18: the bubble can be bright and can be controlled, but it is not white light after reset.
1. Whether the distance between the Hall element and the magnet is between 2-3mm.
2. Whether the lamp is adjusted at zero position.

Common Fault 19: Motor shakes or loses step
1. Whether the motor is short-circuited, causing the IC (3711) to be burned.
2. The motherboard is damaged.
3. Whether the fixing screws of each pattern wheel and color wheel are tightened.
4. The positioning between the Hall element and the magnet is not accurate.

Common fault 20: The channel parts are stuck. The stuck is generally due to mechanical reasons (except for CMY color chips. When a CMY color chip is broken, it falls off, which affects the normal operation of other color chips. At this time, color chips will appear. card stuck)
1. Whether the parts are deformed and cause friction.
2. Whether the installation of each component is in place.
3. Whether the parts are protruding, resulting in stuck.
4. The stepper motor fails, causing the motor shaft to be stuck.

Common faults 21: No display on the display panel.
1. The display panel is damaged.
2. Whether the seven-digit cable connecting the display panel is loose or damaged.

Common faults 22: The X and Y axes are out of step and cannot be positioned.
1. There is too much dust on the optical lotus, resulting in the inability to control the infrared light in place.
2. Whether the fixing screw of the transmission belt is tightened.
3. The optical lotus plate is broken, and the distance between the optical lotus plate and the optical lotus is not properly adjusted (when removing, the lotus root should be in the middle of the optical lotus plate, and there should be no scratches, touches, and rubs).
4. Whether the stepping motor mounting screws are too loose or too tight.
5. Whether the belt is broken.


Contact: Michael Yu

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