- Joined Oct 30, 2008
This device was originally built as two parts—MP3/Radio player + mini power amplifier. Due to malfunction of the mp3/radio unit, I need to replace it with a new MP3/Radio unit. So I bought a new module from Ebay. However the circuit of the new module is little different from the old one.
From the old Mp3/radio modules, only 3 lines come as inputs to the power amp (Left-in; Rght-in & Common ground [-]). Please see the old pic. However on the new module, two small amp ICs (8002A) are used to amplify left and right channels separately before going to the power amp (please see new pic). Further there is no a common ground pin, but all 4 lines come out from four IC pings (instead of 3 ping out , there is a 4 ping out). So if I connect the New Mp3 module as I have illustrate in the “New pic”, 8002A ICs of the radio/mp3 module will burn out because only one negative (-) line is goes through the two circuit (mp3/radio module is powered up through a 5V regulator from the Power supply of the power amp). So please explain me how can I connect this new module with the power amp ?
Herewith, I have attached the data sheet of the 8002A IC for your information.
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