RE: Fluke 9010A and old Atari Night Driver board

From: John Robertson <jrr_at_flippers.com>
Date: Sat May 28 2005 - 13:02:37 EDT

<x-flowed>If you have the extension socket (Instrument Accessory #9000A-7201),
then you can check the voltage(s) as connected to the pod.

It is possible that you have a bad connection at the UUT socket,
isn't it? You have run the pod self test and wiggled the cable while
under self test?

John :-#)#

At 5:48 PM +0100 5/28/05, Phil Morris wrote:
>>If it's a clocking problem, you be getting Pod timeout errors
>>rather than power fail errors, wouldn't you?
>
>Not necessarily - for example, I've had the same problem on an
>L-shaped S.I. boardset which has been 'fixed' by changing the two
>resistors that work alongside the crystal.
>
>>It's most
>>likely that your LM309 is sagging just a little. If you
>>disable power error trapping, you'll probably be fine.
>
>Tried that but no luck I'm afraid.
>
>>It's
>>not a problem endemic to Night Driver boards, as we've
>>done quite a few and never had the issue you are describing.
>
>I see - well, this is a first then. :)
>
>> >Have also tried varying the voltage but to no avail.
>>
>>How could you do that without bypassing the LM309?
>
>Well, because I'm only testing this (but don't have the original AC
>PSU) I've rigged it up on my test bench and bypassed the LM309/LM323
>by wiring the relevant DC voltages directly to the correct tracks on
>the board.
>
>Seems to work too - at least, with a normal 6502 CPU.
>
>Phil

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</x-flowed>
Received on Sat May 28 10:05:32 2005

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