clueless eBay seller for today is:

From: Glen Slick <glen.slick_at_gmail.com>
Date: Sun Dec 26 11:56:32 2004

I can't find my scanned copy of the HP 1000 power supply manual which
has the details, but think the specified resistor plug value is
something 820, not 1K. In practice that difference might not matter.

On the 21MX "B" type power supplies the Battery Chager Board
(5061-1348) plugs into an empty slot on the power supply motherboard,
but the Battery Backup Board (5061-1349) replaces the Jumper Board
(5061-1351). I don't have a Jumper Board to look at and I can't find
the right manual with the schematic of the Jumper Board but I'm pretty
sure it has some components on it and the power supply would not
operate if neither it nor the Batter Backup Board were installed.


On Sat, 25 Dec 2004 19:28:24 -0600, Jay West <jwest_at_classiccmp.org> wrote:
> On the HP power supply and cheater plug...
>
> I'm fairly certain, although not positive, that you can "fix" this problem.
>
> A) Get a battery cheater plug. Of course that's the obvious answer. I think
> it's a 1K resistor across pins 3 & 6. But...
>
> or
>
> B) I THINK that you can cleanly and effectively remove the battery backup
> option from the HP power supply by opening the power supply and removing two
> printed circuit cards. The power supply still works perfectly, just no
> batter backup. I have never tried this, but I am quite sure that the battery
> backup option could be added to a power supply which didn't include the
> option. When you ordered this, you got two PCA's that went into the power
> supply, plus the battery itself. So if you don't have the batter, and no
> cheater plug, I think you could just remove the two PCA's and run fine.
>
> Jay
>
>
Received on Sun Dec 26 2004 - 11:56:32 GMT