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
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 :-(
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...