[Test-Equipment] Trak Systems 8820 - Need assistance

[Bruce Lane]

Fellow techies,

	I've become the proud owner of a slightly sick Trak Systems 8820 GPS clock. It has an unusual problem in that the ToY display runs just fine, but the microprocessor that controls the unit's options and LCD display panel does not seem to be initializing. I determined this after speaking with folks at Trak, and eliminating the possibility that the display was the problem.

	Some random probing of the suspect CPU's address/data lines with an O-scope reveals practically no activity. I'm wondering if something is holding the reset line active...? Or perhaps I've got one or more failed bus transceivers? Heck, I've even entertained the possibility that the CPU chip itself (an Intel 80C188) is bad.

	If there are any other owners of these units that may have run into similar problems, I'd appreciate hearing from you.

	Thanks much.


-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"