Shangqiu professional audio equipment Zhengzhou in 2006, the engine room was digital transformation, taking into account the same series mixer easy to replace, select the same series digital mixer 20 channel broadcast with the same year a similar crash failures . Phenomenon: several inputs, panel work status when good times and bad, our experience based on the maintenance of the first mixer, first open the mixer front panel of the two screws, pull the entire panel, found several inputs problem the reason is to enter a few road module board later loosening re pressurized waiting, try machine everything is normal. After our analysis may be the the mixer after long-distance transport vibration caused the failure phenomenon. In December 2009, and slowly the phenomenon of death, report the situation to records by the value of the crew, the restart time back to normal. Until the number of occurrences of more and more frequent, so according to my experience, direct disassemble the power supply components, screw the next four screws, unplug the power output Plug, take a careful observation of the power supply circuit board in the light board. power components on the fine splitting Circle, re-welding, installation, power on, checked to ensure that no problem the usual mixer brightest working condition. Draw attention; must be careful when pulling, not strong pull to pieces the internal contacts adverse hidden cause of human mating. How to maintain the speakers Shangqiu professional audio equipment Zhengzhou Tel Jiaming Yang 1503 +71780 +75 QQ2579114209 speaker's life and the maintenance of a just how long the life of the speaker, which is a lot of people are concerned about the problem, the normal use should be said that 15 years is absolutely no problem , maintenance good time or even longer, such as the San Xian brother you that Duijin waves 907Be, maintenance, security you use for 20 years, there will never be a problem. In use for more than 15 years in my homemade speaker N, but still normal use. But why some speakers used in a few years on the damage it? And the use and maintenance of a great relationship. Here I will involve speakers and other related issues outlined: Shangqiu professional audio equipment Zhengzhou Tel Jiaming Yang 1503 +71780 +75 QQ2579114209 speakers main speaker unit, divider, box, inverted hole, terminal, wire and other components, From the maintenance point of view, the first three primary, three secondary. 1, the main structure of the speaker unit speaker unit by the choke ring, cone fixed core support chip, magnetic circuit (including magnets, T iron, voice coil), cone frame, while the impact the speakers life in addition to the voice coil is non-normal use burned, the main choke ring and cone. Choke ring: choke ring material life of the order for the selvage, glue plastic composite side edge of the silicone rubber, foam side ...... Easier to damage the foam side (such as JBL a LX Series speakers), due to the foam side speaker unit in the normal use of the fracture almost scrapped 3-5 years, I helped a friend repair N only speaker , without exception, are foam fold ring damage. Of course, material composition and production process of different edge foam, its life would be very different. Followed by the number of silicone rubber edges, the original domestic "Feile bass like to use this choke ring, its main drawback is if the process properly, a long time, easy to aging and to produce inert deformation and moire affect the use. Speaker factories today still widely used silicone rubber choke ring and glue plastic choke ring for most. The Shangqiu professional audio equipment Zhengzhou Tel Jiaming Yang 1503 +71780 +75 QQ2579114209