Question about Car Audio & Video
"Amp Grd" protect in other brand is an error code for short and overload. Once the power applied to the unit and shorts sensed by the processor the unit will automatically turned to "Amp Grd" to avoid further damaged to other parts. Most shorts is in the supply voltage (B+, Vcc) line and most common caused is the sound output IC (mounted in heat sink). This part is responsible for amplifying the audio from the pre-amplifier stage and will feed to your speakers.
If you have a knowledge in disoldering and soldering technique, I would advice you to pull-out this part and then try the unit. If the "Amp Grd" error code is gone then you must replaced this IC with a new one to back your unit in normal operation again.
Hope I helped you.
Have a nice day!
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Posted on May 23, 2011
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Posted on Jan 02, 2017
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