[Techtoolslist] UDN6118A vs UDN6118P

[Matt Rossiter]

My Fluke 9010a display has 6118P.

Matt


On Sun, 31 May 2009 19:50:40 -0500, Rodger Boots <rlboots at cedar-rapids.net>
wrote:

> Usually an "N" or "P" suffix means the package is a plastic DIP.  For 

> Allegro (used to be Sprague) parts the "A" means plastic DIP---for 

> anyone else would have meant improved part.

> 

> 

> barry2 at shilmover.com wrote:

>> 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 at 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 at 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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>>   

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