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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Lounge => Topic started by: Chris Carpenter on April 04, 2011, 01:25:57 AM

Title: Red light inside Crown XLS 402/202
Post by: Chris Carpenter on April 04, 2011, 01:25:57 AM: I have three Crown XLS amps, two 402s, and one 202. They all have a red light inside the chassis visible through the front grill. What is this for?
Title: Re: Red light inside Crown XLS 402/202
Post by: Tim McCulloch on April 04, 2011, 02:58:03 AM: Quote from: Chris Carpenter on April 04, 2011, 01:25:57 AM
I have three Crown XLS amps, two 402s, and one 202. They all have a red light inside the chassis visible through the front grill. What is this for?

It is the "majik smoke retention indicator." If it goes out, the majik smoke has been released from some internal component and the unit requires service. ;)
Title: Re: Red light inside Crown XLS 402/202
Post by: Mike Diack on April 04, 2011, 06:53:26 AM: Quote from: Chris Carpenter on April 04, 2011, 01:25:57 AM
I have three Crown XLS amps, two 402s, and one 202. They all have a red light inside the chassis visible through the front grill. What is this for?

Part of the fan control circuit...
Title: Re: Red light inside Crown XLS 402/202
Post by: Chris Carpenter on April 04, 2011, 11:59:42 AM: Alright, so it's a happy light. Happy lights should be blue/green imho.

Thanks for the help.
Title: Re: Red light inside Crown XLS 402/202
Post by: Chris Hindle on April 04, 2011, 12:10:13 PM: Quote from: Chris Carpenter on April 04, 2011, 11:59:42 AM
Alright, so it's a happy light. Happy lights should be blue/green imho.

Thanks for the help.
Hmmmm. Red light out, fan not happy. Bad happen soon... ;D
Title: Re: Red light inside Crown XLS 402/202
Post by: Chris Carpenter on April 04, 2011, 03:29:09 PM: Quote from: Chris Hindle on April 04, 2011, 12:10:13 PM
Hmmmm. Red light out, fan not happy. Bad happen soon... ;D

Haha, ok.
Title: Re: Red light inside Crown XLS 402/202
Post by: Mike Diack on April 05, 2011, 04:32:58 AM: Quote from: Chris Carpenter on April 04, 2011, 11:59:42 AM
Alright, so it's a happy light. Happy lights should be blue/green imho.

Not in Chairman Maos China - red was the happy colour.
Actually different colour leds have different forward operating voltages so in
this case (being used as a voltage reference) the colour IS important.
M