Question about Harman Kardon SIGNATURE 2.1 Amplifier

Amp problems Have owned this amplifier for 7 years and all of sudden it will not stay on. When switched on by the signature 2.0 preamp the amp will power up and come on for about 10 to 30 seconds and then switch off with the status led flashing amber to red and back. Owners manual says check for shorted speaker connection. Have checked all speakers several times and even disconnected them. Problem still occurs.

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bengsoon Neo

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From the above symptom, it show that the output stage of the amplifier have some problem.The protection cct come in to cut off the amp. when the output shorted or have Dc voltage.( this is to prevent further damage to the amp. & speaker ).If you know how to repair , just check on the pwr transistor (with heat sink )or else send it to the repair center.hope it help.

Posted on Aug 21, 2007

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