"robb" wrote in message
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"Don Bowey" wrote in message
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On 9/9/07 5:00 PM, in article , "robb"
wrote:
"Don Bowey" wrote in message
...
On 9/9/07 12:09 PM, in article ,
"robb"
wrote:
The only thing that will make a difference is you posting a schematic.
well if i had a schematic i would surely post it instead of circuit
board
pictures.
i was hoping some one might notice the chips used and there
configuration
and maybe have an idea about how and what to look for.
thanks for help ,
rob
you could make a list of the Ics on the board and download all the
datasheets for them. That should help you.
Hey Don,
I realize i am not even an electronic hobbyist more like a "dangerous
adventurere" at best when it comes to repairing electronics (i have
succesfully stripped 10 guage wire and i can distinguish resistor from
diodes most of the time)
but, how would looking up all the IC datasheets help ?
would it not be more efficient to concentrate only on the ICs directly
connected to the suspect components ?
thanks for your time,
rob
If you look up the "Data sheets" of those ICs - you can see what their
actions are "supposed" to be - and see if anything is failing to do it's
particular job. You can analyze the outside parts all you want - if a Chip
is failing - you won't know it without the data sheet and way to check it
for input/output. If you have an "input" signal to one of the chips - but no
output - then it isn't working. Not being able to understand the action of
those chips on that board - can leave you scratching your head a while - and
maybe running in circles looking. Checking all the traces, switches,
whatever - isn't a bad thing - but it won't uncover a dead IC - especially
if you have tunnel vision - not wanting to accept it "may" be a chip. I'm
not suggesting it "is" a chip - but the suggestion offered couldn't hurt.
You will have a much better understanding of the "intended" performance of
the circuit. Chips "can" go bad.