Re: BPC/Trionic Computer - Saab 9000 Bulletin Board - Saabnet.com
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Re: BPC/Trionic Computer
Posted by BobS (more from BobS) on Sat, 25 May 2002 11:44:58
In Reply to: BPC/Trionic Computer, Jim O, Fri, 24 May 2002 20:36:35
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You have done a good job of ohming out the BPC and control and your meter is telling you what the problem is. Unfortunately if a coil in the BPC shorts, it takes out the transistor in the control. On some models there is a 5 Amp fuse is the drive circuit, but fuses are much slower blowing than transistors. The drive transistor is a common type but some controls use a hard conformal coating that makes it difficult to remove the transistor. As you have found the resistance into the control varies with meter setting, meters, etc. You have one good drive circuit, look for the same readings in the replacement control. Be sure to get a control with the same part number.
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