UDN6118A vs UDN6118P

All,

I found some old Williams display boards with UDN6118P chips on them. I could not find a pdf for them.

what are the differences between the A and P chips? Are they interchangeable?

Barry

----------------

I meant PDF page 131

Matt

On Tue, 26 May 2009 22:18:04 -0700, Matt Rossiter <matt@rossiters.com>
wrote:
> Some of the Fluke 9010a's (mine for example) might be different than
these
> schematics, but you can look here on pdf page 137.
>
http://arcarc.xmission.com/Test%20Equipment/Fluke/9010A%20Base/9010A%20Service%2
0Manual.pdf
>
> You should know how to convert Hex to Binary.
> HEX-08 -> D7=0 D6=0 D5=0 D4=0 D3=1 D2=0 D1=0 D0=0
>
> If it's reporting BTS 8 is failing - then check the 4116 ram chip
> responsible for D3 - which is at locate U12.
>
> If BTS 12 are failing, it means D3 and D2 are stuck. So check U11 and
U12
> or their buffers.
>
> Matt
>
> On Tue, 26 May 2009 21:41:10 -0400, barry2@shilmover.com wrote:
>> Hooked up the 2nd 9010A. It returns:
>>
>> R/W ERR @ C000 BTS 12 - LOOP?
>>
>> Barry
>>
>> ----------------------
>>
>> I been having trouble posting to the group... trying again.
>>
>> I have 2 non-working 9010A units. On both they beep once, LEDs flash,
> then
>>
>> nothing.
>>
>> Hooked up a working 9010A that I borrowed (thanks David). Bus tests
> fine.
>> RAM
>> returns the following:
>>
>> R/W ERR @ C000 BTS 08 - LOOP?
>>
>> Manual states:
>> If a RAM failure occurs, carefully examine the diagnostic message. The
> RAM
>>
>> Test is usually sufficient for deducing the failed component directly.
>>
>> It then does not explain how to read the message. :-) I am new to
this,
>> so be
>> kind if its a stupid question.
>>
>> I deduced that there is a Read/Write error at C000. How do I "deduce"
> the
>> failed component?
>>
>> Barry
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Received on Sun May 31 19:23:30 2009