Projector
Problem 1: No signal
①VGA cable connection: Check if the projector is selected to VGA Or computer mode;
②HDMI cable connection: Check whether the projector selects HDMI mode, that is, the selection of signal source input;
③The connected device is a desktop computer: according to the resolution of the projector Adjust the resolution of the computer according to the rate, shut down, use VGA to connect the projector again, and turn it on again;
④ If the connected device is a laptop: press FN+FX in the lower left corner of the keyboard (one of F1–F12 to switch the display) key);
⑤If there is no problem with the above operations, the projector still shows no signal, it is recommended to try another cable.
Question 2: The high resolution setting cannot be zoomed
To adjust the resolution of the external device connected to the projector:
①Right-click on the desktop and select “Settings” in “Properties”;
②Find Display 1 and Display 2, where Display 1 is the resolution currently used by the computer, and Display 2 is connected to an external display device;
③ Adjust the resolution of 2 to be the same as that of 1. In some cases, you also need to set the resolution of the projector;
Question 3: No response after turning on the power
①Check whether the external power supply of the projector is the same as the standard required by the projector,
②Once the external power supply is confirmed to be normal, it can be concluded that the internal power supply of the projector The circuit is damaged, at this time, only the internal power supply of the projector can be replaced with a new one.
The conference tablet starts abnormally
Question 1: Automatic shutdown
①Check whether the timer shutdown or sleep function is enabled;
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②Check the channel where the input source is located, no signal will cause automatic shutdown;
③Check whether the power supply is stable;
Question 2: The indicator light does not light up
①Check whether the power supply is normal;
②Check whether the rocker switch of the conference panel is turned on;
Question 3: The indicator light is red , cannot be turned on
Unplug all external link cables, and restart after 15 minutes of power failure.
The computer does not function properly
Problem 1: The image lacks color and the color is abnormal
If you use an external computer, check whether the VGA cable is not properly connected or has quality problems.
Question 2: The display screen is not full or out of range
Check whether the resolution is the best 16:9 resolution, if using an external computer, Adjust the AUTO switch in the lower right corner when plugging and unplugging the VGA cable.
The sound function is abnormal
Please try to adjust the volume. If the conference tablet uses an external computer, check whether the audio cable is connected correctly.
Abnormal touch function
Problem 1: Inaccurate touch positioning
①Check whether the touch pen or finger touches the screen vertically at 90 degrees;
②Check whether there are other objects touching the screen, such as small notes, sleeves, etc.;
Question 2: The touch function is invalid
If the conference tablet is used Connect an external computer to check whether the external touch cable is properly connected.
Video conferencing system
Problem 1: Main TV black screen
Reason: ①Main TV The power is not turned on; ②The main TV is a TV, and the video channel selection of the TV is wrong; ③The image parameters of the terminal or the main TV are not set correctly, such as the real degree is set to 0, etc.; ④The video cable connection is loose;
Method: ① Turn on the main TV power; ② Use the TV remote control to set the corresponding video channel; ③ Set the image parameters of the terminal and the main TV to the default values; ④ Tighten the video cable from the terminal to the main TV;
Question 2: The output image is black and white
Reason: ①The video output of the main TV is set to S-VIDEO; ②The video output of the main TV is set to CVBS ;
Method: Change the video output from S-VIDEO to CVBS; or change the video output from CVBS to S-VIDEO.
Question 3: The main TV does not display images
Reasons:
①The camera connected to the interface where the main video source is located is not powered on
②The selected main video source is not connected to the camera;
③The video output interface corresponding to the main TV can be Video Out 1 and SXGA, the video output actually connected to the current main TV The interface is not the set interface, for example, it is set to SXGA, but the main TV is connected to the interface corresponding to Video Out 1.
Method:
①Turn on the power switch of the camera;
②Switch to the local main video source connected to the camera;
③Switch It is the correct video output interface;
omnidirectional microphone
Problem 1: the sound is not clear
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The pickup distance of the omnidirectional microphone is all within a radius of 3 meters. Try not to exceed this range when using it.
Problem 2: Poor call quality
Turn on the microphone when you need to speak to improve the quality of audio calls.
Question 3: Echoes or noises
Selectively turn off some audio processing functions of the PC and video conferencing software. Then appropriately reduce the pickup volume of the omnidirectional microphone and the speaker volume.
Question 4: Can’t hear or speak
Check if the connection is normal, or change to another USB port on the computer.
Conference Camera
Problem 1: No action, no image when powered on
Reason: Power supply failure, switching power supply failure, power supply failure The cable plug is loose.
Method: Remove the power supply failure and plug the power cord tightly.
Question 2: Self-test fails or is noisy
Check if the power cord is loose; if it is not, it may be Mechanical failure, the user needs to send the product for maintenance.
Problem 3: Not controlled by the remote control
Reason: The battery power of the remote control is low or the distance is too far.
Method: Replace the battery of the remote control and adjust the use distance.
Question 4: The camera image is lost when the gimbal is rotated
Reason: the power supply is not enough or the video cable of the camera is in poor contact.
Method: Check whether the power cord plug is loose, and replace the video cable.
Conference Audio Equipment
Problem 1: No Sound
①Check whether all devices are turned on;
②Check whether the volume control buttons of each device are adjusted to the proper position;
③Check the path switch of each channel on the mixer Whether it has been gated;
④Check whether each connecting line is connected correctly and reliably;
Question 2: Loud humming
Reasons: ①Poor or incorrect grounding; ②The equipment of the system is not on the same power grid; ③The ground potential is seriously different; ④The shielding layer of the connecting wire is desoldered or the shielding wire is connected incorrectly to form a ground current loop;
Method: ① If necessary, an audio transformer for isolation should be added; ② Unplug the connection signal line between the two systems from one system;
Problem 3: Low sound
Reasons:
①The problem of the connecting line, such as the short circuit of the connecting line, the poor matching of the plug and socket, the weak welding of the connecting line, etc.;
②Connecting the equipment Failure;
③Whether the phase of the speaker is wrong;
Question 4: There is interference noise
①Pay attention to the system design Use balanced connection, all audio cables should be audio cables with good shielding performance, and the length of the connecting cables should not be too long, and the grounding should be good;
②Adding RF filters can suppress RF signals;
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