Date   : Sat, 25 Jul 2009 09:20:50 +0100
From   : philb@... (Phil Blundell)
Subject: Econet Clocks and Modules

On Sat, 2009-07-25 at 00:42 +0100, Rob wrote:
> Is it generally just the line driver IC that goes in these?  Or could
> it be something else?

If in doubt I would swap all three of the line interface ICs (i.e. the
AM26LS31 driver plus the two LM319 receivers).  My experience has tended
to be that the LM319s are actually a bit more fragile than the drivers.

But, if you've got multiple modules which are all exhibiting the same
fault, it does seem more likely that it's something wrong with the
network wiring itself.  Might be worth checking your terminators with a
multimeter to make sure that they're still terminating.

p.