PC Speaker Repair
A customer brought this LUXOR PC Speaker System Model SK-808 for repair and the complaint was the audio-out was very low and with distortion.
Of course, first thing I thought was about one or more e-caps with high ESR failure.
The system was disassembled.
When the e-caps were tested on with the Blue ESR Meter, all of them were good. Next step was to clean the volume control (potentiometer) with Castrol spray.
When the Speaker System was tested on again, the system was faulty yet. So the duty was a little harder now. Both the passive as the active components had to be checked on. When the duty was performed, guess what? A transistor was shorted between collector and base, it was an A733P (frequency amplifier PNP epitaxial silicon transistor).
A replacement brought the speaker back to life again and saving it from the dump. PC speaker repair is not that difficult provided if you have the knowledge of testing electronic components.
This article was prepared for you by Humberto Rodriguez, one of our ‘Master Authors’ from Cuba.
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