Re: Atari Tempest issue

Ok after looking at the schems. You should check the function of H2 LS245
to make sure the Aux board is getting the signals via the board
interconnect.

Kevin

On Fri, May 11, 2012 at 5:19 AM, Kevin Moore <talon.k@gmail.com> wrote:

> Then its most likely a buffer chip not allowing the address and data lines
> to talk to the aux. Don't have schematics right now, do you have a logic
> probe ?
>
> Kevin
> On May 10, 2012 11:08 PM, "Elliot Braun" <elliotsphone@gmail.com> wrote:
>
>> Yes I have done that twice... Thanks for the suggestion though.
>>
>> Thanks,
>>
>> Elliot
>>
>>
>> On Thu, May 10, 2012 at 1:14 PM, Rodger Boots <rlboots2@gmail.com> wrote:
>>
>>> You keep talking about edge connectors, the usual problem on tempest is
>>> the ribbon cable connectors between the main and aux boards. Where the
>>> pins are soldered to the boards develop very hard to see cracks in the
>>> solder. Usual fix is to wick off the solder and resolder with 63-37 solder
>>> (Radio Shack calls it "high-tech" solder)---best done with the ribbon cable
>>> removed. 63-37 has a high resistance to cold solder joints.
>>>
>>>
>>> On Wed, May 9, 2012 at 11:48 PM, Elliot Braun <elliotsphone@gmail.com>wrote:
>>>
>>>> Ok, here is the latest.
>>>>
>>>> I re-did the interconnect and did a continuity test and all is well. I
>>>> re-did the connector on the aux board (blade connector that attaches to
>>>> side of the PCB) with all new crimp on ends.
>>>>
>>>> Voltages on Aux are: +22 is +23.6 -22 is -23.5 +5 is +5.06 -5 is -5.06
>>>> Voltages on main board are same +-.01
>>>> Voltages on Audio board are same +- .01
>>>> all voltages taken from the loop lugs
>>>>
>>>> Here is a strange thing: if I disconnect the edge connector on the aux
>>>> board the game fires up in to a semi demo mode, full color but things seem
>>>> to be missing.
>>>> When connected it is same old thing, in test mode EPQM is up no
>>>> response to spinner. In normal mode spot killer activates.
>>>>
>>>> I am thinking a new aux board may help but it seems so strange that
>>>> everything is out on the aux!
>>>>
>>>> Is the 23.5 voltage the cause? If so how do I fix it?
>>>>
>>>> Thank you all for the help so far. Hopefully soon I can try to avoid
>>>> the spikes again!
>>>>
>>>> Thanks,
>>>>
>>>> Elliot
>>>>
>>>>
>>>>
>>>> On Tue, May 8, 2012 at 5:28 PM, Matt J. McCullar <mccullar@flash.net>wrote:
>>>>
>>>>> **
>>>>> All those letters make me think that the CPU board believes the
>>>>> Auxiliary board isn't connected. Make SURE the Aux board is getting +5
>>>>> volts. Reseat all the socketed chips on the Aux board (as in, pull them
>>>>> out, clean contacts, reinstall them). Clean contacts on edge connectors
>>>>> with an eraser. Reseat the Molex connectors on the Reg/Audio II board.
>>>>> (Also reseat all the EPROMs on the CPU board.)
>>>>>
>>>>> Avoid spikes!
>>>>>
>>>>> Matt J. McCullar
>>>>> Fort Worth, TX
>>>>>
>>>>>
>>>>
>>>>
>>>
>>

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Received on Fri May 11 12:44:33 2012