Mac Plus with strange real time clock problem

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Joined: Dec 14 2004
Posts: 6

My Mac Plus is working great- but with an anoying real time clock problem: I can set the clock, hour, minutes, seconds etc- the date- all is ok, but: the clock is going very slow. I have negative time difference of up to 2-3 hours/day. What is that? The battery is fine- I have checked it- I have even exchanged the clock quarz- no change. I have tried anything- there is no description for this error in any forum.
Shall I exchange the RTC chip (real time clock chip)??
Any suggestion will be appreciated very much,

Thanks

ortholing Sad

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sourapple's picture
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Joined: May 27 2004
Posts: 209
just get a new plus off ebay.

just get a new plus off ebay.

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BDub's picture
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Joined: Dec 20 2003
Posts: 706
Is it losing the same amount

Is it losing the same amount of time each day? When did you notice it starting this?

I've got no idea why it's not working, just asking any questions that might jog an answer.

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Joined: Dec 14 2004
Posts: 6
Mac Plus clock

Hi,

>Is it losing the same amount of time each day? When did you notice it starting this?

Yes, the Mac loses the same amount of time each day.
This was the reason why I decided to exchange the Quarz crystal - but without any change. I think, the internal clock oszillator controlled by the RTC chip is going too slow.

BDub's picture
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Joined: Dec 20 2003
Posts: 706
Sounds Logical

To me, that sounds like a good idea. If you're sure you can do it properly, then can it really hurt to try? If it works, then we've got something for some fellow to Google in a few months when they run into the same thing.

I'm more of a software guy, but now I'm curious.

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Joined: Dec 20 2003
Posts: 130
Sell it on ebay as a time mac

Sell it on ebay as a time machine. Wink

coius's picture
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Joined: Aug 25 2004
Posts: 1975
hmmm...

I recently overclocked my PC and it was doing the same thing, found out it was a wrong jumper setting. I think I clocked the board wrong (was also freezing up when I accessed media (mp3, avi, wmv))
Does the oscillator clock the board, or does it control just the timer chip. If the machine was overclocked, you might have set the resisters wrong.

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Joined: Dec 14 2004
Posts: 6
It's working again

Hello,
thanks for the informations.
I just installed a replacement motherboard in my Mac Plus.
The problem is gone now.
It's definitively the real time clock chip.
There was no accelerator installed in my machine- no problems due to overclocking.

Thanks