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Audio distorsionado en canal izqierdo

Hello I am a technician of chili am repairing an amplifier marantz model pm 750dc who presents audio distorcionado in left channel, I change the transistors of exit, the transistors driver, the condensers electrolytic and the constant fault I need help

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The input selector switches if they are dirty can make the amplifier sound like it has a blown channel.
compare voltages from the left and right channel and make sure they are identical as well as the power supply,typically + and - 65vdc .check the regulators for the pream,they run panel lights off the same circuit + - 14vdc

Posted on May 26, 2009

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