[BC] DAX and field repairable

[Alan Alsobrook]

It just hurts me to replace a $500 card when the $0.45 chip would have 
been just as effective. Not to mention that the card crapped out late 
Friday afternoon, Monday is a holiday so you should be able to get the 
new card Wednesday. Unfortunately not many (against engineers advice) 
will spring the money to have a full set of cards on the shelf.

It's not that expensive to keep a full set of semi's and the other 
likely fail parts. In fact I generally carry most of what I need in my 
truck for 98% of failures for everything prior to the SMD boxes.

Of course being a die hard component level person, I now have an SMD 
rework station at my shop and plan to continue with component level work 
even on the SMD equipment. Hopefully the manufactures will continue to 
give us schematics and parts locators.

PS for those who haven't done component level work on SMD's with out the 
map you can be in serious trouble real fast since many parts are not 
identified on the component.

mrfixit at min.midco.net wrote:
> 
>>Welcome to the 21st century. Since the DAX does the PDM encoding and
>>distortion reduction in software, there isn't a lot to repair in the field.
>>The chips are large arrays with far too many chips for you to slap your
>>soldering iron on. Board level swappage is about all you can do, not
>>component level t'shooting 
> 
> 
> Ah, but you ARE doing component troubleshooting and repair. It's just that
> the components are different. They still have "battery and ground", have
> goenintas and goesouttas, and are about as easy now to change as tubes 
> are/were (pull one out, put one in, see if that fixes the problem(s).

-- 
Alan Alsobrook CSRE AMD CBNT
St. Augustine Fl. 32086 904-829-8885
aalso at Bellsouth.net