Question about Coustic Car Audio 601SE Car Audio Amplifier
I have a coustic 601se and i can get it to poer on but the light dims from the bright green to dim green and the sound is ****. it distorts and cuts in and out. the only way i can get it to turn on is jump the remote to the b+ a few times and i can get it to work like half way i suppose. it doesnt want to put out any power. im very good with electronics and im sure all the wires are fine(checked) and i took the back off the amp but can see any burned traces or any other burned items. i will be pulling the entire pcb from the metal surround tomorrow and looking at the bottom of the pcb. i tried finding a schematic for it but no luck. the red protection light does not come on at all no matter what but the green light goes from bright to dimm when turned on. i would think its sumthing in the power circuit but not sure. please help. i ahve good soldering skills and would replace the part myself but dont know were to start. it does not blow fuses at all either. kinda wierd
This is generally caused when there are blown output transistors but that generally causes the fuse to blow or causes the amp to go into protect mode.
If you connect a 15 amp fuse in series with the main power wire and it blows when remote voltage is applied, the amp is drawing excessive current. The problem could be either in the power supply or audio circuits.
Do NOT apply power without having the transistors clamped TIGHTLY to the heatsink. They can fail in seconds when there is a problem. The heatsink helps protect them.
The following page may be helpful when troubleshooting.
Amplifier Repair Primer
Let me know if you have any other questions.
Posted on Aug 23, 2008
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Posted on Jan 02, 2017
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