Repair: HP 9825 16K 09825-66523 memoryboard failure

[Scanning]

I think Tony will agree with me, if not I'll hear about it. If you want to
save the board and don't care about the ( dead ) DIP ICs you are removing,
cut all the legs off of the DIPs and remove them one-by-one with minimal
heat and long-nosed pliers. Also don't use solder wick but rather poke a
round wooden toothpick in the hole to clean it out. This will cause the
least amount of damage to the board and I haven't lost a via yet with this
method. Good luck.

Best regards, Steven

----- Original Message -----
From: "Tony Duell" <ard at p850ug1.demon.co.uk>
To: <cctalk at classiccmp.org>
Sent: Saturday, April 04, 2009 1:04 PM
Subject: Re: HP 9825 16K 09825-66523 memoryboard failure


>
> I've had vias fail on old HP boards when soldering/desoldering
> components. My next task would be to check that all pins on all RAMs go
> to the rignt places and that none are left floating.
>
> And then do make sure that all address, data, etc pins are being driving
> nad that none are floating around.
>
> -tony