Rick W <ve7tk@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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