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I've had QSC power amps with internal fuses in the AC power section, and I have seen the fuse holders separate from the board. These were the 2-piece (per fuse) clips that solder to the board and the fuse clips into them. I'm not sure if you are talking about a speaker, a power amp, or a powered speaker, but if it doesn't power up at all, it's probably in the AC Power Supply area.
might be the fuse or its power supply board faulty. check and confirm, if the power supply unit is faulty talk to qsc the have replacement modules as repair might give you hard time.
Tengo el mismo problema, ella suena pero al subir la potencia se apaga, supongo es una soldarura mala, si es asi por favor especificame adonde y si es otra causa favor indicar.
Agradecido de ante mano!
This can be found on the QSC Support site and appears to be the only reference to the problem on these loudspeakers. Check the site at the link below:
Open up the cabinet, take a look and tighten up the clips that hold the fuse for the horn in place...Tech. support said they've seen that problem many times in the past.
Please give motr of the devices fixed on same heat sink. Search for SMPS IC like FPS or similar, search their application notes and the datasheet of the nMOS. then you can get idea. without those data Solution is impossible.
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