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  1. C

    TDK Power Supply -5V issue - recap done

    I just recapped another TDK, Exactly the same. +12 and +5 are stable and fixed. But -5V swing between -3 and -5. Any schematics on the -5V rail part ? Thanks
  2. C

    TDK Power Supply -5V issue - recap done

    I did clean it really thoroughly with IPA on both sides... I had some suspicion on the Diodes CR50 and CR51, but the measured fine. I also changed the voltage reference IC TL431, but no changes so far :-(
  3. C

    TDK Power Supply -5V issue - recap done

    Hi guys, after fixing 2 Mac LC TDK (699-0153) power supply by re-capping, I am having a issue. 5V and 12V are perfectly stable, but -5V fluctuates "wildly" between -3 and -5V, averaging at -3.9V. No changes if under load or no load. Does anyone have schematics for the TDK power supply? Any...
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