[time-nuts] Austron 2200 stuck in POST loop - fixed.

paul swed paulswedb at gmail.com
Sun Jun 9 13:53:24 EDT 2013


Mark
Good point I missed on the last comment. Yes the ones I have run across in
various places are not any better then whats in the units.


On Sun, Jun 9, 2013 at 1:43 PM, paul swed <paulswedb at gmail.com> wrote:

> Well you have quite a basket case there.
> The only thing you need is the a6 slot which is the antenna board.
> Granted you need to go into the menus and turn off what ever was in the
> old slots. By the way when you get to the menu it will at least give you a
> clue as to what the board was.
> If you get a down converter then the system would actually come up without
> the options.
> It will have the rollover issue so you have to figure out the gps week
> minus 1024 etc.
> But you are a long long way from that concern.
> Can't comment on the replaced parts. I am however sure it will bight me
> one day. Far sooner then later.
> Good luck
> Paul
> WB8TSL
>
>
>
> On Sun, Jun 9, 2013 at 6:06 AM, Mark C. Stephens <marks at non-stop.com.au>wrote:
>
>> Dear all,
>>
>>
>> My 2200 was stuck in a POST reboot loop.
>> It would check, RAM, ROM RTC then say waiting for signal processor the
>> reboots again.
>>
>> During troubleshooting I replaced both Zero Power NVRAM and RTC chips.
>> I only had old ones, but they must have enough juice left and  this has
>> appeared to have cured the problem.
>>
>> The 2 Parts in question are:
>> MK48T128 zero power RTC
>> MK48Z02 zero power NVRAM
>>
>> At some stage someone has replaced the original zero power NVRAM and RTC
>> with the Dallas Semi equivalents which were really pricey.
>> I found the new original part numbers to be much cheaper.
>>
>> I have also ordered both new ones for the princely sum of $20 AUD
>> including shipping :)
>> Well, I am hoping they are actually new and not flat...
>>
>>
>> -marki
>>
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>
>


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