JL 500/5 low ohm light 2 seconds upon turn on

[F rank]

Just purchased a used jl 500/5 . Was told working all well.
Brought it home did a power test no speakers hooked up to it .would turn on but the low ohm light would aluminate for approx 2 seconds then fade away green power light afterwa5ds, I tested each channel with a 4 ohm bookshelf speaker. All channels work well gain works,channels clear sounds equal loudness . When amp powers down low ohm light turns on right at the end ?

Also I removed the cover and powered up, all green leds come on at same time same speed .same brightness.

I called jl audio tech no real information gained .amp was too old for accurate knowledge. He was leaning towards internal short.

 

[Perry Babin]

If all 5 channels work, what is the complaint?

 

[F rank]

The low ohm light is on for 2 seconds when first powered up . Then turns off then green power

 

[Perry Babin]

But the amp works perfectly other than the LED sequence?

 

[F rank]

Yes I tested with a large bookshelf speaker 4ohm 125watt rated on each channel .changed gain and volume on signal.
I just moved that single speaker to each channel and absuved sound quality and volume . It was pretty consistent

 

[Perry Babin]

This is an incredibly complex amplifier, If it's working, don't do anything to it. If it has comax brand switches in it, I would suggest that you not even move the switches unless you have to.

 

[F rank]

Thank you for the quick advice . I look forward to using this forum for my first 500/1 repair. I bought a 500/1 with many mosfets and chip resistors blown .just waiting on parts.

 

[Perry Babin]

Start a new thread for the 500.