![]() I assumed the function of the LED was to drop the control voltage to a safer value and to act somewhat as an onrush current limiter during charging of the muting circuit. And, of course, LEDs don't sport part numbers. Since it was open, there's no way to determine the proper forward voltage. It was a very small LED with a slightly pink lens. Without a good LED, there was no de-mute voltage on Power Amp pin 5. Simple as that.Īn LED in series with the mute voltage circuit, located next to the bank of filter caps on the power supply board was open. As received, there was nada, zip on that pin. ![]() Something like -12VDC needs to be on pin 5 of the header of the power amp board. Turns out there's a control voltage which mutes the power amp until it's up and stable. I need to identify an LED on the power supply board.Īn Eden Metro came into the shop with a problem with no output even though line current draw was normal. ![]() Current US distributor (US Music) where I have a field service contract only has schematics for post-2003. Anybody have access to early Eden amp schematics or BOMs? Pre-2000. ![]()
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