[time-nuts] Austron 2100 Loran-C Frequency and Timing Receiver
brooke at pacific.net
Fri Oct 17 18:14:34 UTC 2008
I used the HP signature analyzer and found a bad data bus buffer chip is short
order. I'm sure it would also identify a bad EPROM chip.
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Skip Withrow wrote:
> Hello Time-Nuts,
> Well, my Austron 2100 seems to have bit the dust. The indication of trouble
> is that the 1pps light quit blinking. After some debug it appears that all
> the hardware is working (I have the manual with schematics) and that it is
> not getting a software pulse that diddles a flip-flop.
> There are some software diagnostic routines in the box. The RAM test runs
> fine, but it appears that I get an error on the EPROM test. The test
> generates an E-20 error. The book states that if the EPROM test fails it
> will give an E-21, but nowhere do I find any hint as to what an E-20 error
> I suspect that perhaps I have a corrupted EPROM. Most of the code appears
> to be working properly (front panel display and buttons work, it will even
> lock to Loran). There are three 2732A EPROMS, but no indication as to the
> checksum on the devices so can't verify if one is bad.
> Is there a time-nut out there with an Austron 2100? I would like to get a
> copy of the EPROMS or the code in them to check my unit. Even the checksums
> would help (given that the firmware revision is the same). The boards are
> very easily accessed from the front panel and the unit doesn't even have to
> be taken out of the rack. I have the capability to read and program the
> Thanks in advance for any help with this oldie, but (was) goodie.
> Skip Withrow
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