Question about Sony XM-1252GTR Car Audio Amplifier
Radio turns on and map goes on for 2 seconds voltage goes from 12 to 7 volt on the +12 side. Volt for the radio is 12 volt and drops to 7 on the rem side.
There may be more than one problem. The fact that the radio AND the amp are seeing a voltage of 7v indicates that the battery is weak or there is a bad connection somewhere in the power line.
It's also possible that the amp is defective (shorted output transistors?) and when it turns on, it's drawing excessive current. That would cause the voltage to drop more than normal. If the amp is drawing excessive current AND there is a bad connection in the power line, the amp may begin to blow fuses (depending on the reaction time of the protection circuit) when you repair the power line problem.
Posted on Apr 26, 2008
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Posted on Jan 02, 2017
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