Hi,
Original Problem:
>
> Hi managers,
>
> We have an Ultra-1 @143Mhz which stopped suddenly and when we
> try to reboot it gives " TOD error check and reset the time and date"
> and hangs. Assoon we switch on the Ultra, above the banner, We
> get a message " starting real time clock " ( which doesn't come
> normally. The "watch-clock" command at OK prompt is not
> incrementing the seconds clock on the screen.
>
> Can anybody suggest how to solve this problem. what is the
> RTC chip used on the ULtra-1 board and can we try replacing it.
> This is the second ULtra which is giving the error. The first
> we have junked.
>
> Thanks in advance for any suggestions.
>
>
> Srinivas
>
> Reply to: sduddupu@cvimail.cv.com
***thanks to Jim Harmon, who is the only respondant. He has
correctly identified the problem. The problem is due the
NVRAM module. *****
Here is the mail what i have received from him:
-----------------------------------------------
The RTC is a self-contained quartz-crystal oscillator and battery.
The ToD Clock chip should be P/N MK48TO8, and is physically part of the
NVRAM module.
The module is in the center of the board, under the middle S-BUS card
position, on the side of the board farther away from the SIMM sockets.
According to the Ultra OEM manual I have, it's extremely
static-sensitive so you MUST use ESD-protection methods to handle the
chip.
(It's possible that someone pulled the module out and handled it without
ESD protection before you got it, which would explain your problems.)
Jim Harmon The Telephone Connection
jim@telecnnct.com Rockville, Maryland
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:12:01 CDT