My in-line fuse blew so I replaced it. Then after I replaced it my amp played for about two minutes. Then It totally quit. I checked the in-line fuse and it is fine. I then checked the amps fuses are they were blown. I then replaced the amp's fuses and when I went to put the new ones in the immediatly blew. What is going on? Any suggestions?
The reason why fuses blow is that the current is too much. Is the fuse rating according to the specs ? If yes then ... One or more output power transistor (or audio power IC) may be shorted. have it checked before replacing another fuse as this might cause more damage.
Posted on May 22, 2007
IC means Intergrated Curcuit. This is a black rectangular shaped componentinside the amplifier that is normally attached to a hetsink to dissipate the heat generated during operation.
60 amps. This is big. Your amplifier must be rated at 200 watts or more !
Holy smoke !
Smoke can come from several components, the worst smoke pruducer are resistors. Capacitors will just pop, and semiconductor will also create smoke.
Is your amp new?
Is it possible that you made the wrong connection ? (Positive=red, negative=black). If you connected the wrong polarity, the first to blow is the reverse polarity protection, in many case this is a large diode connected across the supply in reverse polarity. If you are lucky this diode might be the one causing the smoke, it can be easily and cheaply replaced. The cost of th epart will be probably less than $5.
However because you said that the fuse did not blow, maybe you put a large fuse. This is bad because it might destroyed other parts.
If you are absolutely positive that your connection is OK, something else might blew up (power MOSFET transistors, power IC, etc.) This can be expensive.
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What is the audio power IC? Is that the power cable running from the battery to the amp? If so I checked the power from the battery to the in-line fuse holder and its receiving a good charge. Also I checked the power cable from the back of the in-line fuse to the amp and its also receiving a good charge. The amp in the holder is a 60 (forgot the label, ohm or whatever it may be). This happened to me on one of my other amps also.
Yes, my my amp is rated high. I have a Profile CL1200 amp. I put in new fuses to my amp itself and re hooked it up. When I turned the amp on I noticed smoke coming from out of the top. However, the fuses to the amp, or the fuses to the inline fuses holder were still good. Should I open it or not? Or should I take it to some where to get fixed? About how much do you think it would cost?
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