Question about Alpine MRD-M1005 Car Audio Amplifier

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Repair assist needed

Q306 is very hot-also replacement is same.   zd903 is shorted out I need to know the value???

Posted by jflabill on

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Alex

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I need you to be more specific, what do you mean value? You mean the price of the ZD 903?

Posted on Oct 21, 2007

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dantheman009,

Don't know if this will fix your problem, but my monitor did the same thing. If you look on the bottom of the power supply board, you will find Q305 and Q306. They are probably both shorted. I replaced both transistors and the capacitor C305 on the top of the same board. The capacitor was open. After I replaced the parts it is working again. Look with a magnifying glass and make sure there are no bad solder joints. The only place I could find the transistors were at www.bluestar-online.com. Make sure you order the 2SC5706. It is an exact replacement.

Good luck!
lotto-50

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