Closed konzert 502A amplifier

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kianjay

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mga boss pls help pu..ung amplifier ko pong konzert 502A na gingamit ko pu nwawala bigla ang sound pero bumabalik din agad,anu pu kaya ang sira nito?
 
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baka may sira ang volume control "potentiometer" boss check mo din yung speaker terminal baka kailangan isoldered uli (y)

upload_2014-2-6_15-40-37.webp

potentiometer

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speaker terminal
 
eh sir pagmahina xa sir ok nman.pagumiinit cguro kya naganun.try ko pu sir sinabi m.thank you.. :)
pagvolume mo ng malakas dun nawawala>? ganun ba boss? soldered mo yung part na mga nakakabit sa heatsink baka sa part ng power output ng sound yan :y: transistor or IC yun boss
 
oo sir..paguminit na ang heat sink dun nwawala ang sound tpos bumablik din.pgkalipas ng mga 20 second ganun ulit..
 
baka shorted na yung transistor na kakabit sa heatsink? alam mo ba boss mag check ng transistor? kung bad or good? pero yung power stable naman?sound lang nawawala?
 
may multitester ka ba boss na analog? Tf-ucPdHQMElcwI-inW9sx0Jp4Lb8y3_VA8UV4sHNfxIMZbvEc.webp

upload_2014-2-6_16-38-52.webp


yan yung 3 pins ng transistor 1. collector (+) 2. base (common or switch) 3. emitter (-)
=> lagay mo yung (+)test probe sa collector at negative probe sa emitter makikita mo sa tester movement,
=> try mo naman sila alternate lagay mo yung test probe na (+) sa emitter, tapos yung neg. probe naman sa collector dapat silent yun kung nag move yun may damage,
=> alternate mo rin sa switch or base yung positive probe sa collector tapos yung - probe sa base dapat mag move yun, ganun din sa emitter (y) kung lahat yan nag move tapos kahit alternate mo lahat nag move shorted yan
 
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