Started to work on another CCU board that was sent from someone working on the customer's NSX. The issue was described as 'fan only operates at max setting' so typical CCU failure mode. However, once opened the box, there was only small leakage at C44 capacitor where typically starts leaking first and lots of severe leakages from other areas ...
Wanted to make some changes in the service process so decided to finish the A/C CCU circuit board. It's the later spec light green colour board with all caps in brown sleeve Nichicon PR series. There was only minimum leakage at C22. Initially, ...
Quick bench testing on both boards and happy with the result so time for the conformal coating. Board A with more damages. ...
The board that was hand carried together with Bose AMP and Alpine head unit. Severe leakage and while it managed to penetrate deep into the board, the number of damages were far less than the other board A. ...
The board ...
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