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Re: Intermittent Tachometer 1994 9000 Aero 1 Saabers Like This Post!
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Posted by PioneerRT909 [Email] (#3174) [Profile/Gallery] (more from PioneerRT909) on Mon, 28 Aug 2023 11:54:36 Share Post by Email
In Reply to: Re: Intermittent Tachometer 1994 9000 Aero, RandyNJ, Sun, 27 Aug 2023 13:54:03
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I performed all diagnostics from the trace side of the board. I started with the power and ground pins and checked for resistance between that and whichever component it was connected to by a trace on the board. I checked every two solder joints on the board connected by a trace. I assumed that if one of the two joints was cracked, I would measure resistance when doing this. I used a 22W pencil tip iron at 700 degrees Fahrenheit, bought from Amazon. I think yours should work fine! I found that any solder joints connected to ground may take a while to melt, just because of all the extra traces that can dissipate heat.

->Posting last edited on Mon, 28 Aug 2023 11:55:38.
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