Two low time technos with the same issue . .

I have two used Technos with the 1.3 boards that have the same issue - neither will initialize the processor at all, giving consistent but random junk on the displays.

The odd thing is that these two fixtures were taken out of service in full working condition, packed, and stored in an environmentally conditioned space for about a year, and then shipped to us. Total time on the two was stated to be about 40 hours, and considering the source, I believe that to be true - they are basically in "New in box" condition.

They were run initially on 120V/60Hz, and that is what we have been using here, and the voltage jumpers are correct.

So, the quesion is simply: What can hit two units the same way, in a year of inactivity like this?

Oh, and the 5V supplies are at 4.9 or so, and don't have the diode on them to fail - all power looks good on the logic card . . . .

Anyone have any ideas? Two with an identical issue makes me think this has got to have been seen before . . .

- Tim
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  • That's certainly what this looks like. The major problem is getting to them - both boards have a big gob of clear silicone on top of the oscillator sections of the board . . . . Any suggestions on getting through that, other than careful trimming?

    Part of me is tempted to just strip the discrete oscillator, and install the X2 component - the integrated oscillator in a can . . . the only problem is that on the schematic I have, the part number is unreadable. The other caps, however, appear to be 22pF . . .

    - Tim
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  • That's certainly what this looks like. The major problem is getting to them - both boards have a big gob of clear silicone on top of the oscillator sections of the board . . . . Any suggestions on getting through that, other than careful trimming?

    Part of me is tempted to just strip the discrete oscillator, and install the X2 component - the integrated oscillator in a can . . . the only problem is that on the schematic I have, the part number is unreadable. The other caps, however, appear to be 22pF . . .

    - Tim
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