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I have a sound magus amplifier that ive installed in the car just recently the alarm light has flashed on and hasnt turned off since. the amp was quite hot so i thought it was overheated so i tried it the next day and still the alarm is flashing. ive tried reconnecting the positives and negetives again and resetting everything still doesnt work.. what should i do?

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In this case the amplifier should have some internal problem, mostly one of the output MOSFET blowout. What\s the model number? is that a X1502?

Posted on Dec 12, 2008

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3 Answers

I have a Denon AVR1603, recently I plugged computer in AUX connections at rear (not loud) and it kept tripping out. Eventually it tripped and now the the on/standby light fashes but nothing else happens....


The LED flash indicates that unit goes into protection. Check the power transistors, the 0.22 ohm or 0.47 resistors in the output of the transistors.


SAM ANDERSON

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When I turn off my Luxor TV in the bedroom the standby light flashes blue then orange. The lights are very bright & I have to get out of bed to switch off at the wall socket. What is the problem and...


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When i turn up the stero the power turns off and the red standby light flashes till i turn it back on


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I have a denon AVR-2105 when i switch it on using the On/Standby button which flashes RED it immediatly turns to a green flashing light and the system ignites only to be killed seconds later and the RED...


If your amp looks like it's going to work as normal (ie the front display lights up as it should etc), but then the amp goes into protection mode when the anti-thud circuit times out, then I know what's likely to be wrong.

It's one of the power amplifier channels which has gone faulty.

I just found this out after having this problem with my AVR-1906.

I took the amp apart and de-soldered the suspected channel power transistors (centre channel in my case).....and hey-presto! it fired up as normal (obviously the centre channel would be out of service).

I have ordered the replacement transistors from Farnell (UK) at a miserly cost of around £2-£3 each.

Just waiting for them to arrive.

An alternative is, if you don't use all your channels, take the transistors from a known working but not needed channel and swap them over with the duff ones.

Hope thats of use!

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