Real Time Clock Mac SE-30, 3440042-B

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Joined: Dec 29 2018 - 16:31
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Real Time Clock Mac SE-30, 3440042-B

Just bought another SE-30. This time with severe battery leakage damage. Have been able to clean it up reasonably.
However both The Real Time Clock (UK4) and it's Cristal (Y1) need replacing.

I'm struggling to find a replacement chip for this RTC and the Cristal.
Would anybody know what this RTC can be replaced with? and the Crystal (freq. 32.768 KHz) what load capacity does it require?

Thanks,
Achim

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Joined: Jun 18 2010 - 13:54
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Here's the revelant schematic

Here's the relevant schematic:

 

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Joined: Aug 4 2018 - 21:59
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The chip is an asic so you

The chip is an asic so you are unlikely to find one off the shelf.The use the same part in a GS so that may increase the chance of finding one you can salvage.

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Joined: Mar 31 2020 - 19:55
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I have spare GS mailboards,

I have spare GS mailboards, so I likely have the parts on hand. 

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