Here is a Mazda RX7 CPU2 may be Marked F101 F100 F110 F113 In for repair it’s been about 2 or 3 years since one of these has been in the shop for service figured I should blog about it.
These Suffer from corrosion from leaking capacitors and relay contacts get carbon buildup.
You can see the electrolytic leakage.
Bottom Side of the PCB Corrosion of the Copper Traces.. This is moderate damage very salvageable.
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Here are Some X-rays of the PCB’s this will help gauge the extent of the corrosion. How much work will be required.
I will Get this on the bench I need to remove all caps for replacement, remove all corroded components clean leads and test any that need replaced will be added to the lost of parts it is sometimes less costly to replace the the time spent cleaning.
I mostly will deal with dealers and independent repair shops when it comes to items like this but I will take these in from private party on a case by case basis. I know that a lot of repair shops refuse to work on older vehicles.
Last Updated on February 17, 2026 by Steven Rhine