[TenTec] OMNI 5 GOES DEAD ON 40

[A R]

Dave,

 

My OMNI V is I think an '89 production (s/n 63A10699), and like yours has the 8-pin U8 RAM. The hold-up battery is an easily replaceable 3v CR2032  Lithium which I replaced about 2 years ago when the "time" went volatile. To be honest, I don't recall whether or not any other RAM data (other than "time") went volatile. So, we may be two fortunate OMNI V owners that aren't faced with the piggy-back baterry/RAM kluge. Life is good....

 

Allen--W7GIF

 

 


----- Original Message ----- 

From: David and Dianne on Comcast<mailto:dhhdeh at comcast.net> 

To: Ten Tec Reflector<mailto:tentec at contesting.com> 

Sent: Thursday, February 12, 2015 3:51 PM

Subject: [TenTec] OMNI 5 GOES DEAD ON 40



Hi All,

Confused I am.

I am the original owner of a 24 year old Omni V.9 
from 1991, a last production run unit. It still 
runs beautifully.

On my logic board in the Omni V.9  the NVRAM chip 
is identified as U8 and id'ed as a X2404P on both 
the schematic and on the top of the chip itself. 
No manufacturer is named on it.

It is only an 8 pin chip and does not physically 
resemble the chip shown on several of the links in 
this thread in the past few days.

It is a thin chip as with others on that board and 
with no apparent "battery bulge" on its top 
surface.  On the schematic, pin 8 of the chip is 
Vcc taking +5V from the radio off of the logic board.

Am I missing something here?  Could TT have 
changed this chip in a later production run of the 
logic board? Why has it not failed after 24 years 
if it's life expectancy is +/- 10 years?

Info and any speculation appreciated.

BTW as asked earlier, what functionality is lost 
if there is a battery in it and it fails.

Thanks,

73 de N1LQ-Dave


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