led display appearance and the inspection standards

A visual inspection,

Detection methods: visual, feel

1. The color and sample consistent with (normal visual acuity in natural light or under fluorescent observation not have clear off color), with products no color difference (note: off color including color and luster); Coating surface smooth, level off, even, shall not be surface has the following defects: not to stick, particle, leakage bottom, hemp dot, hair flower, corrugate, mechanical damage;

2. Coating adhesion: there shall be no any falls off phenomenon (including graphs)

3. Printing appearance: silk screen content should be clear, complete, even color, no flash, defect, trailing, pollution phenomenon; All the specific content of silk screen, location, design and font size, by corresponding drawings to a detailed description, production factory strictly in accordance with the requirements of the design drawing screen printing.

Second, the inspection

Detection methods: the detection tool: caliper, tape, level feet.

Requirements: inspection personnel shall be in strict accordance with the design personnel to display the drawing all incoming material inspection, check if there is one less, leakage processing components, such as have this problem, should be reflected in the competent or purchase there.

1, group hole and welding forming at system should ensure that the positive flatness, may not have warp, all round led panel deformation, flatness error less than 1 MM; The positive panel orientation to strictly control the size of holes, pore size and pitch error is less than 0.1 MM; Group of hole axis X, Y direction should be in the same line, respectively, and the straight line perpendicular to the edge of the box should respectively, vertical degree less than 1 MM.

2, body shape dimension deviation is not more than 0.5 MM, two are no greater than 1 MM diagonal.

3, body each welding place must be strong, no virtual welding welding, and leakage phenomenon such as welding, welding points must wear away, weld seams should do scraping the ash treatment, the process must be strictly standards. Weld seams polished, smooth waterproof seals must be flat acute Angle.

4, check whether acute Angle, whether to remove burr, are not allowed to have poured blunt blow hand, thorn hand phenomenon.

5, the nuts and nut column must be approved by back teeth processing, ensure the smooth lock screw into.

6, inspection cabinet whole assembly asking whether the facts, the processing according to the drawings accessories (such as lock, hinge) should be used in the existing standard parts, when assembly must ensure the mechanical strength and the sealing performance.

7, box in the pack module, the production department note the outer ring screw need M4 hex screws.