VAX 4000-200 Maintenance

Alexandre Souza alexandre.tabajara at
Thu Nov 19 19:22:32 CST 2015

Common househoud vinegar does wonders for this kind of battery leak

2015-11-19 20:11 GMT-02:00 Glen Slick <glen.slick at>:

> On Thu, Nov 19, 2015 at 1:35 PM, william degnan <billdegnan at>
> wrote:
> > It was a pain to take the M7626 apart, I did think about replacing but
> > decided I don't mind entering in the date whenever I boot up the system
> vs.
> > worrying about the future.
> >
> Removing 6 screws and a lock nut on the M7626 KA660 H3602 console
> panel to remove the PCB so you can remove the battery now is a lot
> easier and better than doing it later after the battery has started
> leaking and corroding things and then trying to repair the damage.
> I was just looking at a system with an M7626 KA660 a couple of days
> ago and the network connectivity through the H3602 AUI Ethernet port
> was very flaky. The H3602 had some signs of leaking battery corrosion
> that I had previously tried to clean. I swapped that H3602 panel with
> another one that also had some signs of leaking battery corrosion and
> that one seemed to work OK, at least for now. Trying to correct
> whatever is damaged on the bad H3602 panel will be a pain. It's not
> worth the risk of leaving those NiCad battery packs in any old DEC
> gear. It's not that much of a pain to set the date and time every time
> I actually get around to powering on the systems.
> The early VAX 3100 desktops have those same evil NiCad battery packs.

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