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• 1、How to make your mind up a circuit paper?1）The pixel pitch of the unique LED module must be in line with the circuit paper;2）The common LED bead specs must be in line with the circuit paper; 3）Some merchandise have versions between vertical and horizontal lamps (vertical lamps are more common, whereas horizontal lamps are less common); If the original LED module is a vertical lamp, the circuit paper for the vertical lamp must be selected. 2、Measurement formula for the pixel pitch of LED module1) Measure the horizontal dimension(W) of the LED module utilizing a caliper ;2) Count the number(N) of LED lamp beads in the horizontal course ;3) Calculation: Pixel pitch (P)=The module length (W)/The kind of lamp beads (N) 【Numerical accuracy to 0】 3、Measurement components for LED bead specification1) Measure the horizontal measurement (X) of LED beads using a caliper;2) Measure the vertical size (Y) of LED beads using a caliper ;3) Calculation: LED bead specification=SMD (X) (Y); 4、The difference between vertical and horizontal lamp (as proven in the figure) 5 is the Circuit Paper?Circuit Paper is a type of double-layer flexible circuit board。Its thickness is just 0。6 of the Circuit Paper?Circuit Paper consists of visual display unit printing,base material, pads,holes, wires and slicing line ect is the Circuit Paper used?The collision of LED demonstrate throughout installation, disassembly and transportation can smoothly result in PCB pad falling off. At this time, you should use the Circuit Paper to fix PCB to use the Circuit Paper?First step, you must train the following maintenance instruments and consumables: anti-static bracelet, soldering iron, hot air gun, multimeter, tweezers, tin wire, solder paste, scissors, screwdriver, lamp beads, Circuit Paper, IC, and so on second step is to wash the broken pad, scrape the broken PCB pad with a knife blade, and wipe it with alcohol to prevent quick circuit with the Circuit Paper 0.33 step is to cut diversified sizes of Circuit Paper and tin on each side of the pad, simply so the quick circuit of the lamp foot can't be caused by too much tin fourth step is to adjust the soldering iron temperature to about 320 ℃, clamp the tin-coated Circuit Paper with tweezers on the left hand, align it with the placement of the soldering pad of the PCB lamp tube, press it gently on the pad, after which warmth it with soldering iron or scorching air gun to make the Circuit Paper and the PCB pad totally fuse, listen in on the typical poles to be aligned;The fifth step is to light up the module, exhibit in full white, modify the brightness to the suitable differ for bare eyes via sweeping obliquely, weld the certified beads to the Circuit Paper, listen in on the polarity path of the beads, and think about whether the pins are connected with the multimeter earlier than welding；Step 6: after the module investigate is qualified, the lamp beads within the upkeep section should be packed with glue. (indoor module would not desire glue filling)；

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