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Cluster inverter reverse engineering project
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<blockquote data-quote="mwolson" data-source="post: 16807716" data-attributes="member: 16006"><p>I have developed schematics as far as I can without taking the components off of the PCB. The resistor numbers I chose may not match the numbers on the PCB since I can read them with the components in place. Here are the schematics as far as I have gotten: (EDIT: Updated to R2.0)</p><p></p><p>[ATTACH=full]1759516[/ATTACH]</p><p></p><p>Based on the signals I saw on the base and collector of Q1, it is an NPN bipolar transistor, not an N-channel MOSFET.</p><p></p><p>I am assuming that the transistor is the component that will most likely fail, but will have to see when I get a failed inverter. I have 4-5 candidate transistors that may work as a replacement part for the FST837 transistor. I will have to try them to see. I still have to get the components off of the PCB to figure out the transformer wiring, the part number of D1 and the value of C2.</p><p></p><p>I am still looking for a failed inverter to take apart and to try to fix. I also hear that 03 Lightning clusters have the same inverter in them...</p></blockquote><p></p>
[QUOTE="mwolson, post: 16807716, member: 16006"] I have developed schematics as far as I can without taking the components off of the PCB. The resistor numbers I chose may not match the numbers on the PCB since I can read them with the components in place. Here are the schematics as far as I have gotten: (EDIT: Updated to R2.0) [ATTACH type="full"]1759516[/ATTACH] Based on the signals I saw on the base and collector of Q1, it is an NPN bipolar transistor, not an N-channel MOSFET. I am assuming that the transistor is the component that will most likely fail, but will have to see when I get a failed inverter. I have 4-5 candidate transistors that may work as a replacement part for the FST837 transistor. I will have to try them to see. I still have to get the components off of the PCB to figure out the transformer wiring, the part number of D1 and the value of C2. I am still looking for a failed inverter to take apart and to try to fix. I also hear that 03 Lightning clusters have the same inverter in them... [/QUOTE]
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Cluster inverter reverse engineering project
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