Hi all,
I got this magic subwoofer with 6 x 8" elements inside it. It is equipped with 2 amplifiers inside both driving 3 elements each. I took a big risk and bought it defective but it was working at time of bying it. But hearing some noise when powering it up so decides to have a look inside. What i found was 70V dc coming from one of the amp at speaker output, so i measured all the elements coupled to this amp and luckily they looks ok (13.5ohm each).
There is some burnt components on the amp itself and a shorted output IRF4227 between S and D. It is 2 resistors and also a capacitor with signs on it. Should i also replace the driver IC IR2110s or could thisone be measured before putting a new pair of IRF4227 ?
I got this magic subwoofer with 6 x 8" elements inside it. It is equipped with 2 amplifiers inside both driving 3 elements each. I took a big risk and bought it defective but it was working at time of bying it. But hearing some noise when powering it up so decides to have a look inside. What i found was 70V dc coming from one of the amp at speaker output, so i measured all the elements coupled to this amp and luckily they looks ok (13.5ohm each).
There is some burnt components on the amp itself and a shorted output IRF4227 between S and D. It is 2 resistors and also a capacitor with signs on it. Should i also replace the driver IC IR2110s or could thisone be measured before putting a new pair of IRF4227 ?
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I have a ML 1500X subwoofer that has the same amp board. Have you repaired yours? Mine has blown R65 and R66 resistors. I had a problem before with the same resistors I replaced them and now they have gone bad again. I don't know if it is a design problem or what because MOSFETs looked ok.
Hi Hacuelo,
I have not finishen repairing it Yet
What you must consider if there is only resistors to be replaced is all the small electrolytics inside it. Replace them with better type of quality caps.
I had to replace one of Mosfets an those Two resistors and Even the driver ic for mosfets.
I have not finishen repairing it Yet
What you must consider if there is only resistors to be replaced is all the small electrolytics inside it. Replace them with better type of quality caps.
I had to replace one of Mosfets an those Two resistors and Even the driver ic for mosfets.