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Thread: Radio sound dead

  1. #41
    Join Date
    Dec 2003
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    Eastern Tennessee USi
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    Quote Originally Posted by bob91343 View Post
    The reason I wired the switch was that the original switch failed and I didn't want the cost and effort needed to replace it.

    I was in there today and wiggled every wire in sight with no change in performance. I will have to take stuff apart now.
    Pull that plastic crap and look at the wires. I cant imagine even a 50K mile example being mint.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  2. #42
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    Dec 2003
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    For what it's worth, it will pop back on and off by wiggling the wire cable deal. Noticed wife put stuff in the trunk against left side and amp shut off, so juggle and works most the time. Starting to get annoyed with this. Last few times over the weeks I open the trunk and just hit the thing through the trunk fiber whatever it's called and it will come back on. Thinking it's an internal solder connection to the power connection. Has not pizzed me off to open it up and check that yet but close. Very annoying.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  3. #43
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    Dec 2004
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    Sydney, Australia
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    Just setup your soldering station, open the amp up and re-flow every joint that connects to a major component, and any others that aren't shiny. The constant heat cycling causes physical expansion/contraction near transistors and large capacitors, stressing the soldered joints so they get micro-cracks which cause the intermittent troubles you are describing. Alternately 20 years of vibration will crack joints holding heavy components.

    A real pro would wash the back of the board with pure alcohol first, lightly scrubbing with a toothbrush (no force on any small/SMD components). Then do the same after you're done soldering. Tip: When you re-flow a joint, add some solder if it looks dull. Iron @380 degrees, and use a magnifying glass if you have to, to be sure you don't leave any solder shorting one pad to another as sometimes they are very close.

    All will be good after this, I've little doubt. For a certain fix, you swap the capacitors, but these are all pretty good quality, so I'd only change one that is leaking or showing signs of internal pressure (in extreme situations they can explode like tin cans)

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  4. #44
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    Dec 2003
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    Pretty sure it's just one point on the power wire circuit. Jiggle wires works most times. Seems all I have to do is hit the side of the trunk and it's repaired indefinitely.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

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