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Octane : can't set tod clock

Posted: Mon Oct 30, 2017 7:59 am
by commuter-roach
Hi everyone,

Today , while trying to prep an old Octane I wanted to give away, I got greeted by this message , repeating over and over

"Cant' set tod clock"

You can access the system maintenance main menu and run hinv, but that's about it. Any other action is greeted by the same message. Any of you guys know where the battery is located on the Octane? Is there a way to fix this?

Thanks

Daroach

Re: Octane : can't set tod clock

Posted: Mon Oct 30, 2017 8:48 am
by jan-jaap
Probably the battery of the Dallas timekeeper chip on the mainboard ran out:
mainboard.jpg

I don't know of you can still order them. I would just dremel the sucker and mount a CR2032 socket on it 8-)

Re: Octane : can't set tod clock

Posted: Mon Oct 30, 2017 9:01 am
by commuter-roach
Oh there it is! Thanks!!!

On mine it says "Dallas 1687-5" Made in Philippines. There seems to be some folks selling them on ebay. Any chance you'd have a tutorial on how to open it and replace the battery?

Re: Octane : can't set tod clock

Posted: Mon Oct 30, 2017 9:35 am
by jan-jaap
I've not yet had to perform this mod on an Octane, but the DS1685 / DS1687 datasheet suggests that Vbat is at pin 20 and it's GND at pin 16. These pins are not present externally, but that's where you start with the Dremel. The rest is probably similar to other Dallas hacks.

Be careful with the Dremel, you just want to expose the contact, not grind it away because that leaves you very little to solder a new wire (speaking from experience). I use some hot glue to add stability and seal the thing. With a pair of wires external to the Dallas, it's up to you how to supply battery power. I use SMD style CR2032 battery holders.

Edit: this could serve as a tutorial: http://www.classic-computers.org.nz/blo ... y-chip.htm

Re: Octane : can't set tod clock

Posted: Mon Oct 30, 2017 10:52 am
by commuter-roach
Thanks! If I can't get by a cheap replacement I'll give it a try!

Re: Octane : can't set tod clock

Posted: Mon Oct 30, 2017 2:42 pm
by jan-jaap
commuter-roach wrote:Any chance you'd have a tutorial on how to open it and replace the battery?

Here's how I modded the DS1286 from an Indigo2: viewtopic.php?f=4&t=16732361#p7405714

Re: Octane : can't set tod clock

Posted: Tue Oct 31, 2017 6:58 pm
by necron2600
This may be a silly question.. but I'll ask anyway ;)

A lot of dallas chip ''fixes" online only seem to glaze over the actual chip removal and re-inserting from the board. (some do it while chip is not removed from the board at all)

Is the Dallas chip easily removed from the board (and replaced if you have a good one lying around.. or one from ebay/china)? Is it soldered in, or could a regular chip puller pop it out? If its just pop-out.. does anyone have any best practices for removing one? (Screwdriver one end first then the other end, etc.? )

Thanks

Re: Octane : can't set tod clock

Posted: Tue Oct 31, 2017 7:45 pm
by Trippynet
In my experience, Dallas chips are easy to remove generally. They're socketed and providing you have a replacement, it's not too difficult at all to pop the old one out and slot in a replacement.

The only thing that can sometimes make things a little tricky is if there's components nearby that make access a bit more difficult (such as on the Fuel). In these cases, an IC Extractor makes removing the Dallas a lot easier.

Re: Octane : can't set tod clock

Posted: Wed Nov 01, 2017 9:50 pm
by japes
Generally if you can get your hand on them they're big enough to pull straight out without trouble. Caution on Indigo2's the socket they live in has a different number of pins than the chip, remember where it sits in the socket.

Re: Octane : can't set tod clock

Posted: Thu Nov 02, 2017 1:26 am
by jan-jaap
japes wrote:Caution on Indigo2's the socket they live in has a different number of pins than the chip, remember where it sits in the socket.

Noticed this when I modded the Dallas in this Indigo2.

This is how it should be installed in the socket. The IP22 mainboard had been removed from the chassis when I took this picture.
dallas_indigo2.jpg