Reply To: Beomaster 4400 – Sudden drop in sound?

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If the 15v rail is failing, my question would be why? I’ve not often seen a failure on a power rail without some serious damage. And it would also stay broken, not degrade with time?

The voltage could drop due to the voltage regulator overheating (i.e. bad thermal connection to the heat sink), or the system drawing more current than the regulator can provide (i.e. some other device drawing too much current), or a combination of both (i.e. high current draw causing the regulator to overheat). The device wouldn’t have to completely fail. Think of it more as going into a self-protection mode.

Have you been monitoring the output of the Overload Circuit? Could it be something as simple as a bad light bulb in the circuit causing it to work improperly?