How to Quickly Solve VGA Long Line Driver Frequently Asked Questions

Keyword: VGA matrix, VGA matrix switcher, VGA long-line driver, Nanchang monitoring matrix switcher, Hefei RGB matrix switcher, Jiangxi control system, Anhui monitoring matrix, Jiujiang video surveillance, Huangshan VGA

First, VGA long line driver overview

1. With the popularization of information-based offices, more and more VGA long-line drivers are used in industrial control, medical equipment, and security monitoring.

Long-line driver is used to solve the problem of image signal (video, computer VGA, HDTV HDTV) in the long-distance transmission, because the cable is too long and the signal loss causes the image to be blurred, darkened, trailing, etc. Composite video, Y/C color difference component video, RGB, RGBHV, YPbPr, YCbCr component video transmission distance and image quality.

2. The VGA long-line driver often encounters image problems in the process of use, such as insufficient clarity, tailing, blur, color cast, etc. How to do it? Here we give specific solutions to common problems. In general, after the following treatment, satisfactory results will be obtained.

Second, there are images but the image jitters up and down:

1, the cause of the fault: generally long-line driver adjustment HV signal adjustment switch is not adjusted.

2. Solution: Use a small screwdriver equipped to slowly adjust the adjustment knob on the far end of the extender to a satisfactory image state.

Third, images and fonts have tailing phenomenon:

1, the general causes of the general failure; 1. Crystal head is not pressed well, the contact resistance is large 2. The remote adjustment switch is not adjusted well. 3. VGA long-line driver RGB amplification is not adjusted well, resulting in RGB signal attenuation in the transmission line Severe 4. The network cable quality is poor or the network cable distance exceeds the using distance and distance, and the network cable quality is normal.

2. Solution: Adjust the remote knob, re-press the crystal head, use a good quality crystal head, to ensure good contact. Use a good brand of cable (super 5 cable is better), the transmission distance is longer, please use our recommended The brand cable, transmission VGA line using copper core good quality cable to reduce attenuation.

Fourth, the image appears lack of color, adjust the switch can not be resolved

1. Cause of the fault: The VGA interface of the VGA long-line driver has a poor connection problem. The VGA connector has the problem of the signal line or the signal grounding on the grounding line.

2. Solution: Check the VGA port or replace the VGA cable, check whether bad contact problems and test whether all pass, heavy pressure or redo the crystal head. Distance short tail is generally shielded crystal head and network cable is not properly grounded Problems, solutions, grounding, and use of shielded crystal heads.

5. The remote monitor has no image and the indicator light is off:

1, the cause of the failure: Generally speaking, the VGA interface is not connected and the cable problem.

2. Solution: Check the VGA port and cable section to ensure smooth and good contact. Check whether the cable and connector are in good contact and contact.

Six, the image has water ripples:

1. Cause of failure: Generally there is strong electromagnetic interference nearby.

2. Solution: The wiring disturbs the interference source. The VGA cable cannot be used for cable assembly. The AC interference can be easily crosstalked to the signal cable. There is also a 50Hz low-frequency interference between the equipment power supply and the power supply ground.

Seventh, equipment lights do not shine, there is no image:

1, the cause of the failure: Generally there is no equipment power supply and equipment damage.

2. Solution: Check whether the 220V power supply of the equipment is power supply;

Guangzhou Ming Control Intelligent Technology Co., Ltd. Technical Department

The Name of Rectangular Duct Fan 

Rectangular pipe see / centrifugal Pipe Fan impeller for the front-wing multi-blade centrifugal impeller, single suction, the fan is designed to enter and exit horizontally, the square inlet and outlet can be directly connected with the duct, fan motor for air conditioning motor, the machine has a noise Low smooth operation, long service life and other characteristics

According to the diameter of 140 ~ 500mm sixteen series of specifications for the air volume of 130 ~ 7280m3 / h, the total pressure of 45 ~ 810Pa, in order to meet the noise requirements of different places, divided into: ordinary type: all the materials for galvanized steel through the bite Mouth shape

Muffler type: the fan part of the galvanized steel through the bite shape, box board for the color coated with acoustics materials, aluminum frame for the profile, the inlet and outlet with a filter

Rectangular duct fan / Centrifugal Fan bar

The type of gas delivered: air and other unnatural, non-corrosive, harmless gases

Impurities in the gas: the gas must not have viscous material, dust and hard particles contained in more than 120mg / m3


Performance curve

rectangular duct fan


Gas temperature range of use: -200C ~ 800C This series of fans are used only indoors, and should be installed in the direction of the sample front view, not upside down installation, installation is not allowed side legislation, otherwise it will affect the service life of the motor, for outdoor installation , Must consider the motor rain measures

Rectangular pipe fan / centrifugal pipe fan design selection instructions,

The pipeline fan is a forward multi-wing centrifugal fan, the same air volume, partial pressure case, the noise is much lower than the axial fan

This series of fan air volume, wind pressure, noise and other parameters are based on the actual needs of many projects proposed, widely used in public places to send exhaust system

The top of the fan housing marked with the direction of the arrow out of the air, to avoid reverse installation, delivery, exhaust series under normal use

When the transport of cold air may cause condensation on the outer surface of the casing and pipe fans should be designed insulation, fan noise is the rated air flow, air pressure is not connected to the air duct when measured at a distance of one meter from the outlet , With the inlet and exhaust pipe, the noise will be attenuated, for the noise requirements of the higher occasions, the exhaust pipe should be arranged in the muffler elbow or muffler, fan with single 200V motor power wiring diagram Place in the fan power junction box

Vibration small fan operation, the general need to use damping measures, if the design considered necessary, the fan can be supplemented with damping rubber or rubber vibration damping spring


if you want more information,please contact us.

Rectangular Duct Fan

Rectangular Duct Fan,Rectangular Inline Duct Fan,Portable Rectangular Duct Fan,Rectangular Ventilation Fan

Shenzhen Fu Sheng Electric Co., LTD. , http://www.fushengfan.com