About A18 firmware upgrade
A18 android projector support OTA online update Android firmware. Every time we update the firmware, after uploading to the cloud server, U4 Smart Version will prompt to update, Operation video guide: https://youtu.be/bblHJdZmiE4
It can also be upgraded via U disk
1、The product can be turned on normally. Please use this method to open the settings.
Step:
Note: the upgrade process must not be interrupted.
Firmware upgrade operation guide video: https://youtu.be/hkZ_3aB10lI
2、If the product cannot be turned on normally, please use this method to open the settings
Step:
b.You can click the icon below to download the firmware of A18 . Do not change the name of the file, otherwise the projector will not recognize it.
c.After downloading the firmware, copy it to the root directory of the USB drive. Be careful not to put the firmware in the folder.
e.Then connect the power cord of the projector.
Note: the upgrade process must not be interrupted.
Firmware upgrade operation guide video:
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Firmware version:
Operation instruction video connection: https://youtu.be/u0ZM4TpQvyA
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Operation instruction video connection: https://youtu.be/bblHJdZmiE4
Operation instruction video connection: https://youtu.be/hkZ_3aB10lI
Operation instruction video connection: https://youtu.be/D_fOIKbvZiU
14.How to turn on Bluetooth speaker mode of A18?
Operation instruction video connection: https://youtu.be/5YigoF-xjVA
15.How to turn on ARC settings of A18?
Operation instruction video connection: https://youtu.be/mALsKCEZQlU
16.How to turn on automatic obstacle avoidance of A18?
Operation instruction video connection: https://youtu.be/lC58qAzpzbI
17.How to turn on and power on A18?
Operation instruction video connection: https://youtu.be/b5UNgAgJ1QM
18.How to solve Fire TV stick 4K connected to the projector to play movies no sound?
Turn off Dolby in the setting sound of Fire TV stick 4K.
Step:”setting”—-“display&Sound”—“Audio”—“Dolby digital output”—“Dolby digital plus OFF”, Turn off Dolby,Do it a few times,Confirm whether Dolby is successfully turned off.
Tips: Some sources can work normally without turning off Dolby and setting them to automatic mode. If there is still no sound in automatic mode, you must turn off Dolby.
Operation instruction video connection: https://youtu.be/2S77xzLHC84
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Operation instruction video connection: https://youtu.be/QcpAPlVMv20
14.How to use corner keystone correction in Vevshao A12?
Operation instruction video connection: https://youtu.be/ekKOSKyJ1e0
15.How to read USB data in Vevshao A12?
Operation instruction video connection: https://youtu.be/Q-LjT_e5qDg
16.How to switch input method in Vevshao A12?
Operation instruction video connection: https://youtu.be/w48MEmDeALc
17.How to implement zoom function in Vevshao A12?
Operation instruction video connection: https://youtu.be/uExTkxxIBDQ
18.How to solve Fire TV stick 4K connected to the projector to play movies no sound?
Turn off Dolby in the setting sound of Fire TV stick 4K.
Step:”setting”—-“display&Sound”—“Audio”—“Dolby digital output”—“Dolby digital plus OFF”, Turn off Dolby,Do it a few times,Confirm whether Dolby is successfully turned off.
Tips: Some sources can work normally without turning off Dolby and setting them to automatic mode. If there is still no sound in automatic mode, you must turn off Dolby.
Operation instruction video connection: https://youtu.be/2S77xzLHC84
1.1 The projector comes standard with a 2.4G wireless remote control. If the remote control does not work, you need to re-operate the remote control to pair with the projector.The operation method is to take out the battery of the remote control, start the projector, wait for the projector to turn on, then move the remote control close to the projector, and then install the battery of the remote control, and the remote control will re-pair with the projector.
1.2 If the pairing is unsuccessful, replace a remote control and try again.
1.3 If the replacement of the remote control still fails, it may be that the cable between the remote control receiver and the motherboard is loose. Reconnect the cable between the receiver and the motherboard.
1.4 If there is still a problem, there may be a problem with the remote control receiving circuit board or the main board. Just replace the corresponding parts. There is a disassembly video guide below.
Fault phenomenon:
After the projector presses the power button, you can hear that the fan inside the projector is working normally, but there is no light coming out of the lens at all, maybe the LED is not working.
First, disassemble the projector to check whether the cables on the power board are connected properly. If the cables on the power board are connected normally and there is no looseness, the projector still does not work, and a new power board needs to be replaced. If it is still not normal, you need to replace the LED. If the lens still has no light after replacing the LED, you need to replace the motherboard.
Usually replace the power board projector is normal. LED damage is generally caused by high voltage breakdown of the projector’s LED due to lightning strikes or unstable household power grids.
Fault phenomenon:
The power indicator on the top cover of the projector is not on, or there is no light coming out from the inside of the projector lens (that is, the LED does not work), it may be a problem with the power board, and the power board needs to be replaced
Operation instruction video connection: https://youtu.be/gUAvSF-tfwc
4.Replace vevshao A18 series projector LED?
Operation instruction video connection: https://youtu.be/prKCrzoWKlM
5.Replace the motherboard of vevshao A18 projector?
Operation instruction video connection: https://youtu.be/SxbxgmtJNn4
6.Replace the focus motor of vevshao A18 series projector
Fault phenomenon:
If you press and hold the “F+” and “F-” buttons of the remote control, the projector lens cannot move back and forth, that is, it cannot be focused. It may be that the focusing motor is not working, or the circuit board connected to the focusing motor is not working. Replace both parts.
Operation instruction video connection: https://youtu.be/dtj9nlvJJh0
Operation instruction video connection:https://youtu.be/iSTWUN5KCuo
8.Replace vevshao A18 Projector LED Cooling Fan
Operation instruction video connection: https://youtu.be/uzdftPI2w_Y
9.How to replace the LCD of the vevshao A18 projector?
Fault phenomenon:
If the picture image is abnormal, there are colored streaks, or there are cracks, black blocks that will not recover after the projector cools down, etc., the LCD may be damaged and the LCD needs to be replaced.
Operation instruction video connection: https://youtu.be/tpz5xGegBds
10.What should I do if the remote control does not respond? How to replace theremote control receiver inside the vevshao A18 series projector?
Solution:
Replacing the remote control receiver inside the projector, operation guide video URL: https://youtu.be/wookGgnGZJw
11.How to replace the heat-insulating glass of A18 series projector?
Fault phenomenon:
If large areas of yellow spots appear on the image and the projector cannot be restored after restarting, the heat-insulating glass may have been burned yellow or the LCD may have been burned yellow and damaged. The heat-insulating glass or LCD needs to be replaced.
Operation instruction video connection: https://youtu.be/vGbh0HNnSn8
12.vevshao A18 projector all parts disassembly instruction video (disassemble: motherboard, LCD, power board, fan, Insulation glass, reflector, lens, LED, focus motor, speaker, )
Operation instruction video connection:https://youtu.be/0_M5FKQ_6J4