[TenTec] Orion Backup Battery

[Bill Miner]

I just had the front panel off and removed the DSP and display boards from 
my ORION 565.

I fixed a cold solder joint that was causing intermittent Monitor audio, 
found a lose ground connection, and resolved a shaft bind problem with one 
of the VFO optical encoders.

I was not specifically looking for a battery but I looked the boards over 
pretty close and I did not see a battery of any kind.  Is the backup battery 
just in the ORION II or did I somehow miss it in my rig?????


Thanks & 73,
Bill - K6WLM


----- Original Message ----- 
From: "shristov" <shristov at ptt.rs>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Monday, August 03, 2009 1:00 PM
Subject: Re: [TenTec] Orion Backup Battery


> Rick W <ve7tk at yahoo.ca> wrote:
>
>> Okay - I give up!  Can someone please point me to the Orion
>> schematic which shows where the backup battery enters the
>> circuitry?  I've gone through the schematics until my eyes hurt
>> and I guess I keep missing it!
>
>
> Board A7, schematic file 81917_13.PDF, chip U501 (M48T35AV).
>
> With DIP version of the chip, the battery is an integral part of the chip.
>
> With SOIC version of the chip, the battery can be separated and replaced 
> (SNAPHAT).
>
> For details see the STMicroelectronics datasheet.
>
>
> 73,
>
> Sinisa  YT1NT, VE3EA
>
>
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