Arcam Alpha 9 – Constant Amber LED Issue

[mikescraigslist]

Hello guys,

I have a strange issue and I'm wondering if any experts might have an idea of what's going on.

I have an Arcam Alpha 9 integrated amp that plays fine and sounds fine, but its power LED is always amber whenever the speaker outputs are engaged. This happens even when the volume is set to 0 and no music is playing. The amp has two sets of separately switchable speaker outputs, and the LED goes amber as soon as either is switched on—even if no speakers are connected.

According to the manual, an amber power LED indicates one of the following:

1. Internal protection is on and speakers are disconnected, or
2. The unit is on mute, or
3. The unit is overheating or the output is overloaded.

Since I can hear sound, options 1 and 2 are ruled out. Option 3 concerns me, but the unit never gets too hot, even after playing for hours at moderate volume. Should I be worried, or is it likely just an issue with the LED while the amplifier circuit is actually working fine?

Any tips or opinions are welcome. Thanks in advance!

 

[JonSnell Electronic]

If the relay has pulled in correctly, there will be no bias voltage on the LEDERR Red as Z501 voltage on pin 6 should be 0v or a negative voltage.
LEDON Green should be permanantly illuminated, when on.
Amber means both LEDs, Red and Green are on.
I would check voltaged around Z501, if for nothing other than peace of mind.