Well – these have the dreaded Dallas DS “all in one” Real Time Clock (RTC) chip with integrated Xtal and battery. Now the battery is dead, configuration is. FEATURES. ▫ Drop–in replacement for IBM AT computer clock/calendar. ▫ Pin compatible with the MCB and. DSA. ▫ Totally nonvolatile with over Dallas DS, DS and Compatibles – External Battery Rework Advice. The following is some extra information that you might find useful if you plan to.

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The listing doesn’t say that the RTC comes with the battery and it has voltage something essential for machines that use these real time clocks so your old computer will be able to store it’s CMOS data again.

Of those, the following thread mentions certain things like the DS is not always a substitute for the DS When you get past the potting compound and into the terminals, clear away just enough potting resin to catch the negative battery terminal heading up to the top of the package.

In my replacing it, needed de-soldering it as well, something not that easy.


Dallas DS DIP Real Time Clock 3pcs | eBay

Every time I booted up the machine, I was greeted with the errors above. All that remained then was to simply wire up a button battery holder to the exposed metal.

What’s the date code on yours? Best rework chip, save lots of diy effort.

Dallas DS1287 DIP Real Time Clock 3pcs

Whatever you do, handle the pins on the module carefully. Even its successor DS is dz1287 hard to get and darn expensive. Soldering was the next big thing. This item doesn’t belong on this page.

You can see the result here sorry, the text is in french: Originally Posted by DOS lives on!! Show More Show Less. You may have even read of people doing exactly this, although most accounts I’ve found don’t say just how this is done. Booting up with the reference disk, setting the configuration and clock then rebooting showed the fix worked perfectly!

There are lots of old threads here on DS replacement.

I discovered that the RTC chip was dead. Ratings and Reviews Write a review.

I have a motherboard that has been sitting around unused for a couple years. My hack job can be seen below. Curiosity killed that cat. Save on Other Integrated Circuits Trending price is based da1287 prices over last 90 days.


It involved hacking away parts of the chip, then rewiring an external battery onto it. Wendt who wrote up the procedure.

Dallas DS, DS and Friends – Rework Advice

I didn’t feel up to soldering a CR holder onto the module and there’s the question of finding one in stores around hereso I dallws a triple-A battery holder and some batteries from Radio Shack. I found the substrate quite soft and easy to cut into.

Unless of course you’re like me and have more bad luck than you should when things come down to the wire. Bookmarks Bookmarks Digg del. The case is usually pretty much “solder-resistive” because of the anti-corrosion plating.

Be sure not to use rechargeable batteries. I just want to tell you that I succesfully used your DS rework How-to. So you have my dsllas and gratitude for putting that idea on the web.

That is assuming you can get the part in the first place. I replaced my RTC chip in my Compaq Deskpro s with one of these sold by ds287 and it works perfectly. Possible Results Reworked chip inside a Mod.