Subject: Re: Trouble booting on Multia
To: None <firstname.lastname@example.org>
From: Tim Rightnour <email@example.com>
Date: 04/21/1998 18:14:46
On 21-Apr-98 firstname.lastname@example.org spoke unto us all:
# Based on what I've heard already, I guess I'd better get specific.
# The RPs in question are all 4.7K pullups. The numbers on the silkscreen are:
# E221, E222, E226, E227, E228, and E233
# The parts that we have seen that are bad, and it is bad parts, are all marked
# | 4820P-002 |
# | -472 |
# | xB 9435 B |
*DING* My dead multia (which behaves *exactly* like the post that started this
thread) has these exact parts on it.. just like you say.
# Remember that there are several different models of Mulitas. Ours are 166MHz
# ones, with a PCB number of 5022554-01 D1.
Yep. mine too.
# Based on what we've seen, DEC got a bad batch of the 4.7K pullup RPs that
# develop shorts between adjacent pins over time. We now routinely replace all
# these RPs. BTW, we also replace E215 with a 74ABT623. This part buffers the
# ECC bits from DRAM and the ABT part seems to work much better at temperature.
# Once this is done, the Multias seem to be as reliable as anything else.
*WOW* Where can I get these parts??? (now I need to start practicing my
soldering) If this cures my multia woes (and those of many others I'm sure)
than I owe you a debt of gratitude.. Now I'm off to find my digikey catalog.
Tim Rightnour - email@example.com