Boys and girls,
the replacement cpu and micro processor crystals arrived.
The first, and easiest, was to insert the cpu.... no joy
so removed the logic board, installed a new crystal and lo and behold, there be
life in the rig.
Just for grins, I put the original cpu in and it didn't work so looks like both
the micro processor and the crystal were bad.
Now for the bad news
No display!
nothing, nadda, zip
yes, I checked and I have +30 volts drive from the dc-dc inverter.
Tried doing a master reset (several times) but still no joy.
I have +voltage, the on board regulator are well, regulating, and all plugs
have been cleaned and reset. There's not much there. The cpu on the driver
board is oscillating so, the crystal (and I assume) the cpu is operating. But
still no display
I'll scope a few of the multiplex data line and see if there is data being sent
to the display.
Any ideas out there in ten tec land?
Mike Bryce wb8vge
prosolar@sssnet.com
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|