We have to do LED display, the first material to be enough, today Xiaobian to collect a LED display installed production process for everyone to understand the necessary materials and display the necessary process. A display screen covers the top of the frame, showing local, local control, power supply and small parts.
1. Frame part: special aluminum, corners, light steel keel, rear baffle (aluminum-plastic plate, European pine board will do)
2. Show local: cell board. Annex covers: cable power cord.
3. Control the local: control card, adapter board, cable. Note! (Individual control card does not have to transfer board and cable)
4. Power supply local: 220V-5V power supply. Commonly used for 40A, 30A. Start working conditions.
5. Small accessories: 16P cable, 16P card head and clip, three core numerical line, DB9 head (needle, hole) DB9 plastic shell, power cord, self-tapping. Strong magnets (pillars and magnets)
6. Tools: cutting machine, crimping pliers, electric iron, wire strippers, screwdriver.
Assembly steps
Do a display screen first to confirm the size of the frame, the following I explain for everyone all the way to cut the border. Take the most commonly used 3.5 * 90 profile and P10 unit board as an example. The display volume is 2 blocks * 5 blocks.
1. Confirm the size of the unit board, to be very accurate to mm. Take the P10 unit board: its size is 16cm * 32cm.
2. Calculate the height and width of the cell plate in the display panel, as in the case of two highs * 16cm = 32cm wide and 32cm * 5 pieces = 160cm
(32cm-4mm) * (160cm-4mm) = 31.6cm * 159.6cm. The net size is 32cm * 160cm, as described above. 31.6 and 159.6 is the actual size of aluminum, and the display is more than 3 meters to be reduced by 5mm.
4. the corners and cut the profile with a self-tapping joint good, thoroughly tidy debris, face down to put.
5. Put the unit board in the direction of the direction, not the wrong direction. There is a pin to the ground must be high in the profile
6. Put the iron pillars on the unit board and spread the chips into the rows of the nursery posts.
7. The amount of light steel keel required to cut the length and cut, put on the magnets, try to let the stone in the central position of the keel, to avoid the deviation from the distance.
8. The keel with a self-tapping and border with good.
9. With the cable to the unit board together, into a bridge type, can not let the cable has the phenomenon of button.
10. Fix the power supply to the appropriate position inside the profile, according to the following said that the power supply where the power is really put, the power on the exposed screen under the general profile. Note the insulation with the cell board.
11. Even the power cord, the power cord can not know the unconnected, revealing the screen is low-voltage office, but the current is very large. Can not all the way and come, a P10 cell board full of current 4A, that is a 40A power supply can take ten unit board. Show the screen line in parallel, that is, positive cathode, cathode cathode, ordinary VCC, +5 V, + V for the positive pole. GND, COM, -V for the cathode. And the cathode must not be connected to the wrong, otherwise it will lead to unit blackboard scrapped. Example: a 40A power supply with 10 units board, we can be divided into three and to a power to the 5V once, and then three and power to the last time, the final four and together to the power supply The That is to say that each road is not more than four units of the board, so it will not be due to excessive current caused by the destruction of the line.
12. Place the chuck on the input of the cell board and be supplied directly from the power supply to 5V.
13. Control the card's pin is in the order of the points. Such as JK1.JK2 ... or J1.J2 ... JP1.JP2 ... ... the location of the unit board to be connected to the input side of the arrow at the top of the unit plate.
14. Unit board and control block of the joint: ordinary control card pin a peripheral white color letters A, the unit board input also have such characters, as long as the two A parallel with the cable Is accurate.
15. After the above work done after the screen inside the debris must be thoroughly tidy, to avoid the conductive aluminum, iron, the line fell into the circuit board to drive the unit plate destroyed.
16. After finishing the work well, power test, the premise is to do a good job. Because most of the digital control system card is not changed before the value is revealed normal. So meet the power after the show messy symbols, dark, bright spots, and so on ... ... do not Zhang Huang, as long as the positive cathode is not wrong to ignore it.
17. Numerical line welding method: ordinary display only use the following two kinds of two. Extension line: This is the demand for each display. As the name implies, its utility is to control the card's numerical interface extended to the exposed screen outside Because your display will eventually have to cover the cover, the total can not change the data back to a back cover! He needs the material: a section does not have a long three-core line, a DB9 pin, a DB9 hole. Each DB9 behind the welding at the top are marked with digital 6789, we only keep the inside of the three can be a. The three are 235 for the needle 2 and the hole 2 is welded with a three-core wire inside the burner. 3 and 3 burns live in 5 and 5 burns. Make sure to put the plastic shell to the end of the needle, (because the hole in the screen inside) OK!
Do not intersect the two straight lines with the extension of the same line of welding, the difference is not intersecting two straight lines with two DB9 holes, are required on the plastic shell. The difference between the staggered lines and the two straight lines of the same material, the difference is the staggered line 2 connected to the other 3 on the 3 connected to the other 2, 5 still then 5. also need two head plastic shell.
18. Staggered lines and disjoint two lines are based on the use of control card to vote on the use of parallel still staggered.
19. do the rest of the office is the rest of the adjustment, the premise is the display capacity must be adjusted. As the market control card category is very much adjustment I do not introduce.
20. After adjusting the test after 2-5 days, if no problem can be cut off the back cover. The final can be delivered!
Precautions
1. Unit board and control card must not receive more than 5V on the electricity.
2. all the line cathode must not be wrong.
3. You must thoroughly clean up the debris inside the screen.
4. 220V AC regardless of positive cathode.