Clock not updating with good battery

[captjon320]

I just ran into something that I haven’t seen yet, any help would be appreciated.

Mac SE FDHD, logic board had removable battery type.  Not the soldered battery.  Running 6.0.8 with a Blue SCSI hard drive.

I replaced the battery, no corrosion visible.  Cleaned machine and rebooted.  Everything normal, except the clock/date  will not update.  I can change time/date but the seconds do move on the clock, they stay at 00.  I could come back three days later and the clock/date will be exactly the same as what I set.  Also, all the other settings I may have changed will not fall out (mouse movement speed, etc) they remain to what I set.  After Dark will not activate, I assume since the clock isn’t being recognized.

I have tested the voltage with machine off and also on (under load). I have good voltage both at the battery and also the positive trace that runs down to the chip.  
 

I’ve never encountered this before, any help would be appreciated.

 

[hideehoo]

Sounds like a bad RTC chip or crystal.

 

[captjon320]

Thanks, I was unfamiliar with the RTC chip, I’ll check it when I return home next week.  
 

The little reading that I’ve done about the RTC is that is was a custom part for Apple and there aren’t any replacement parts available,  unless a person can pull one off another board.  Does that information sounds correct?

I appreciate the hell and will update this once I can take a look at it.