The heat source of LED lighting mainly comes from two parts: light source and power supply. The heat of the light source part, usually pay attention to the effective contact area between the light source PCB and the heat sink surface, the greater the effective contact area, the better the heat dissipation. In addition, it should be noted that the heat conduction interface between different media is as smooth as possible. The adhesion between the heat conduction material should be tight enough, and the contact surface gap of the chimeric part should be as small as possible.
Mainly three parts: shell, light source, power supply. The housing is divided into glass enclosures orThe acrylic cover; A lens; Heat sink; Aluminum substrate; Power preinstalled cavity (usually in the radiator); Plastic connectors (mainly for insulation); Lamp holder interface (E2M16, etc.) The second category is the light source: there are two categories of particle type and high-power integrated molding. The third type is the driving power supply.
Reflector: Reflector is used to reflect and concentrate the light of the LED light source to improve the lighting effect. Reflectors are usually made of highly reflective materials, such as aluminum or polycarbonate. Drive circuit: The LED light source needs a drive circuit to provide stable current and voltage to ensure the normal operation of the LED.The driving circuit usually consists of power supply, current regulator and so on.
A complete LED lamp should include LED cooling housing, LED transparent lampshade, LED circuit board, LED driver power, LED lamp beads. Which is more important depends on your requirements. If the pursuit of long-term use, the power supply and heat dissipation is very important. If the pursuit of high brightness light transmission and lamp beads is very important. Looking for LED lighting accessories to directly find the manufacturer, you can search in Baidu LED lighting accessories gold blue light.
Drive power supply: according to the characteristics of the power supply, it can be divided into constant current power supply and non-constant currentPower. LED aluminum substrate: LED tubes use LED aluminum substrate, or in order to save costs, some businesses will use glass fiber board. PC cover and aluminum slot: PC cover for high light transmission cover, also known as transparent cover, diffusion cover two. Plug: has a single end and is powered on with two ends. Heat transfer paste: High quality heat transfer paste, good heat dissipation.
1, hot air gun welding. Although the heat gun will be fine after welding, it will malfunction after a little cold. Resistance to surrounding and protection relatedCapacitor inspection did not find the fault component, because the machine will be good in the inspection, so waste a lot of twists and turns, and sometimes found that the backlight on both ends of the booster capacitor will be lit up with the meter pen test, but it will be protected for a while, and sometimes he does not protect.
2. First, find the backlight protection option in the TV menu, which is generally located in the image or display Settings. Then, choose to turn off or adjust the level of backlight protection according to your needs. However, it should be noted that too high brightness may cause damage or premature aging of the screen, so try to choose the appropriate brightness level. In addition, periodicallyCleaning the TV screen, avoiding dust accumulation and touching the screen are also important measures to protect the LCD screen.
3, sn51dp backlight maintenance method is as follows: Measure the main switching power supply circuit output of each group of voltage is normal, especially "24 V voltage must be normal and stable". If the above are normal, it means that the switching power supply circuit is not faulty, otherwise it is the switching power supply circuit problem. The next step is to measure whether the backlight drive control circuit board and the power supply voltage are normal.
AND gate, ANTENNA, BATTERY DC power, BELL, Bell, BVC coaxial cable connector, BRIDEG 1 rectifier bridge (diode), BRIDEG 2 rectifier bridge (integrated block), BUFFER buffer, BUZZER buzzer, CAP capacitor.
Proteus switching components names are relays, transistors, switches, multiplexers, photoelectric relays, sensor switches and so on. Relay Relays are a common open