Preview for : Focusrite Platinum 10 TwinTrak Pro Hand drawn PCB layout/wiring, and deduced schematic, for the Channel 2 MIC input stage up to the LINE/INST switches. Took ages to trace this, while fixing this unit (R59 open, causing very low MIC gain). Channel one circuit will be identical, and PCB layout looks similar. Hope this is useful to others working on this model. I think the input circuit is similar in a lot of other Focusrite mic preamps, so may help with other models too.



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Focusrite Platinum 10 TwinTrak Pro Hand drawn PCB layout/wiring, and deduced schematic, for the Channel 2 MIC input stage up to the LINE/INST switches. Took ages to trace this, while fixing this unit (R59 open, causing very low MIC gain). Channel one circuit will be identical, and PCB layout looks similar. Hope this is useful to others working on this model. I think the input circuit is similar in a lot of other Focusrite mic preamps, so may help with other models too.