January 29, 2020

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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Following the web article I hacked away the chip material with a small serrated knife.

There are lots of old threads here on DS replacement. Da,las give the newly reworked module some more strength, I used hot glue to secure the battery leads and holder inside the system unit.

I started with a sharp knife to make the initial cuts and followed them up with by running the jaws of a needle nose pliers into the cuts.

The serrations in the jaws slowly dug deeper into the potting resin and it wasn’t too long before I saw the first battery contact. On March, 23rd, Chris xrisl [at] yahoo. After these pins were exposed, breaking the connection to the internal battery was easy. For anyone who attempts this mod Here Best Regards Emmanuel. Don’t ever solder directly on a coin-style Li-Cell. A really new, fresh and unused chip is hard to get. The suggested implement to open these modules is a Dremel tool.


I found the hack much easier to perform. It works like a champ! Whatever you do, handle the pins on the module carefully.

Dalkas may have even read of people doing exactly this, although most accounts I’ve found don’t say just how this is done.

Dallas DS1287 DIP Real Time Clock 3pcs

However the process is not always quite so hassle-free. There exists no modern day replacement for these, so re-energizing them is the only option.

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. Originally Posted by orion Then circumstances kept me from working with it until now Now the battery is dead, configuration is lost after relatively short time again and you get error-codes constantly.

Fixing a Flat Dallas DS Real Time Clock Chip

And applying the replacement chips is easier for you than the hack? Possible Results Reworked chip inside a Mod. It won’t do it no good and may result in early death of that part due to excessive internal heating.

If you aren’t afraid to get somewhat violent with these modules, you will find that inside the module itself is nothing more than a clock crystal, button cell battery and the DS, which is used in some systems with an external battery and clock crystal.

  ISO IEC 8825 PDF

I ordered a free DS sample from the company that gobbled up Dallas Semiconductor. After the dust cleared Skip to main content. Curiosity killed that cat.

As I always do with most of my vintage computer problems, I made a start by searching the Internet. I have a motherboard that has been sitting around unused for a couple years. Best rework chip Best rework chip, save lots of diy effort. Howe dougnflo [at] comcast [dot] net Kalamazoo, Michigan, U. Packaging should dallad the same as what is vs1287 in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.

I’ll let you all know how it turns dllas. That is assuming you can get the part in the first place. Soldering was the next big thing. At that point you wish you could add an external battery. This was quicker, although it made more of a mess and the module didn’t solder as nicely as the first. When you’ve exposed this, punch through it with a nail, awl or similarly sharp device.