Home▸ Forums▸ Macintosh Portable only works when connected to the AC adapter — #12▸ Macintosh Portable only works when connected to the AC adapter — #12
Post #12 by uniserver
Source ForumMacintosh Portable only works when connected to the AC adapter — #12
CategoryTroubleshooting
Post DateFri, 11 Sep 2015 - 01:57
Original URLhttps://68kmla.org/bb/threads/macintosh-portable-only-works-when-connected-to-the-ac-adapter.2646/
Post
i would not put voltage to both terminals as that would never be done in a normal situation, as to why you think that would be ok kind of bothers me.

seems like you know just enough to be dangerous. 

in a normal situation , to that 4 pin connector, it would be Either or.  there would be 9 volts to the one pin... OR there would be lead acid battery voltage to the other... never voltage to both at the same time. as the 9 volt battery is only there to keep what is in ram for only long enough to change the main lead acid battery.

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