Re: IIe no-slot-clock: battery replacement?

[david@uow.edu.au (David Wilson)]

buggie@ben03.unm.edu (stephen e buggie) writes:
>The NSC is an IC embedded in a 28-pin wide IC-socket.   WHERE IS THE
>BATTERY?  If its buried in the frame of the IC socket, then its voltages
>must be communicated to the IC via the legs of the IC.  In that case,
>wires could be soldered to the appropriate two legs of the IC, then
>connected to a lithium coin battery that could be encapsulated and hung by
>wires over the edge.

The battery is external to the IC (I think it is embedded in the underside
of the socket). The battery terminals are clearly marked on the PCB - the
PLUS terminal is adjacent to pins 13 and 14 while the MINUS terminal is
adjacent to pins 15 and 16. This is for a DS1216B or DS1216C. You could
easily cut the -ve track as it is on the top side of the PCB and connect
an external power source to the +ve terminal and the cut trace. The pins
are near the large B or C on the PCB.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia  david@uow.edu.au