A high-density display pcb board repair enclosure fixture and repair method

Abstract

The invention discloses a high-density display screen PCB board maintenance enclosure fixture and maintenance method. The enclosure fixture includes a peripheral shield arranged on a heating platform, and the peripheral shield is provided with a PCB bracket arranged up and down, an inner The enclosure, the PCB bracket is provided with a placement slot for accommodating the PCB board, and the fixed-point heating enclosure on the maintenance area on the PCB is realized through the relative movement of the PCB bracket, the inner enclosure and the heat accumulation of the inner enclosure. The present invention realizes the localized preheating of the high-density display PCB board through the enclosure fixture, fully meets the heating requirements for maintenance of small-pitch lamp tubes, avoids large-area heating from causing damage to lamp tubes and chips that do not need maintenance, and at the same time It is beneficial to reduce the heating time of the hot air gun, avoid the phenomenon of yellowing caused by the long-term heating of the lamp tube, greatly reduce the maintenance difficulty of small-pitch products, and improve the maintenance efficiency.

Description

technical field [0001] The invention relates to a high-density and small-pitch display screen PCB board maintenance enclosure jig and maintenance method, belonging to the field of display terminal manufacturing equipment. Background technique [0002] At present, small-pitch LED products are widely used in the market, but for small-pitch LED products, maintenance is a difficult thing. Relatively speaking, large-pitch lamp tubes and IC surface maintenance can be directly repaired with a heat gun and a soldering iron, but the time, temperature, and operation difficulty are different for small-pitch lamp tubes. At present, low-temperature solder paste is used on the surface of the lamp tube on the market, which can be heated and melted at a lower temperature to maintain the same soldering ability, but it poses a higher difficulty for maintenance. Large-area heating is easy for lamps that do not need maintenance. and chip damage. Generally, the size of small-pitch tubes is abo...

AI Technical Summary

Problems solved by technology

At present, low-temperature solder paste is used on the surface of the lamp tube on the market, which can be heated and melted at a lower temperature to maintain the same soldering ability, but it poses a higher difficulty for maintenance. Large-area heating is easy for lamps that do not need maintenance. and chip damage

Generally, the size of small-pitch tubes is about 1mm*1mm, and its heat resistance and reflow times are much worse than those of large-pitch tubes. Blowing with a hot air gun for a long time may cause the LED tubes to turn yellow.

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