Thanks!
I added the Newswire link to my DS1287 notes,
along with the other "reworking" pages.

http://www.3kranger.com/HP3000/mpeix/hard.shtm#CLOCK

Interesting rework on the YouTube link.

Keven


----- Original Message ----- 
From: "Stan Sieler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sat 21 Nov 2020 05:21 PM
Subject: Re: [HP3000-L] [EXT]: HP3000 / 918LX - Tape drive does not 
recognize inserted tape.


> Re:
>
> On Fri, Nov 20, 2020 at 3:38 PM RUTMJVA <[log in to unmask]> wrote:
>
>> What would be the symptoms of a good battery?
>
>
> No problems? :)
>
> ---
>
> The 9x7 battery for "backup" is a largish lead-acid battery, and has
> nothing to do with the Real Time Clock (RTC).
>
> So...from here on, I'm discussing *ONLY* the RTC battery...
>
> On 9x7 systems, the RTC battery is part of the RTC "chip" (from Dallas
> Semiconductor, IIRC) ...
> and it is *NOT* replaceable.  (Googling will find some instructions on how
> to cut out the chip and
> replace it with a newer model with a replaceable battery ... not for  the
> faint of heart).
> See:
> https://3000newswire.blogs.com/3000_newswire/2018/11/power-on-and-battery-tricks-sustain-3000s.html
> (Or, about 2/3 down on
> https://comp.sys.hp.mpe.narkive.com/qvoM6DhY/hp3000-l-system-halt-7 ...
> some guy
> named 'sieler' posted.)
>
> 

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