Identifying old IC's

C

Chuck Douglas

Guest
I have a problem and don't know where to look for a solution. We just had a
very humungous lightning storm here in Ontario Canada. It wiped out a large
computer driven XY plotting router. This is the main machine in a small sign
manufacturing company. This machine is quite old ( 10 years or so ), but
originally was worth about $90,000. The company that made this device no
longer supports it.

I have managed to repair a couple of minor problems caused by lightning
strikes in the immediate area of the building. Now the machine will perform
all local functions and self tests. However there is no communications with
the computer. I am quite sure that the problem now is with the receivers and
line drivers to the port that communicates with the computer. We have no
schematics of the machine, and no support from the manufacturer.

An examination of the layout of the main board suggests that there are one
of four possible IC's that are closely connected to the computer cable as it
enters the machine. However I cannot identify these chips. Here are the
numbers on these IC's:
9509N this is the most likely culprit
L293E
L297
4N206

I would be very gratefull for any info on any of these chips especially the
9509N. What type of chip, what is its function, a lead to an available
substitute would be fantastic!

I apologize for the length of this post.

Charles Douglas

warrior@rideau.net
 
"Chuck Douglas" <


** Why is it that tedious bloody idiots like you leave out:


1. The make, model and country of origin of the machine the part/s come
from.

2. The brand names/logos printed on the part/s concerned.

3. The type of package and number of pins.


Is it just to make identification as near to fucking impossible as can be
???



BTW I know you have posted this same query on other NGs.




............ Phil
 
On Sat, 12 Jun 2004 10:08:46 -0400, "Chuck Douglas"
<warrior@rideau.net> put finger to keyboard and composed:

An examination of the layout of the main board suggests that there are one
of four possible IC's that are closely connected to the computer cable as it
enters the machine. However I cannot identify these chips. Here are the
numbers on these IC's:

9509N this is the most likely culprit
Click to expand...
If it weren't for the "N" I would guess that this is a date code, ie
9th week of 1995. Any other numbers or logos? Is there a matching chip
in the computer?

L293E
PUSH-PULL FOUR CHANNEL DRIVERS:
Click to expand...
http://www.st.com/stonline/books/pdf/docs/1328.pdf
http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm
http://www.nteinc.com/specs/1700to1799/NTE1749.html

L297
Stepper motor controller:
Click to expand...
http://www.st.com/stonline/books/pdf/docs/1334.pdf

4N206
Click to expand...
I'm guessing that this is an optocoupler. Does it have 4 or 6 pins? Is
there a matching chip in the computer?


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
On Sat, 12 Jun 2004 10:08:46 -0400, "Chuck Douglas"
<warrior@rideau.net> wrote:

I have a problem and don't know where to look for a solution. We just had a
very humungous lightning storm here in Ontario Canada. It wiped out a large
computer driven XY plotting router. This is the main machine in a small sign
manufacturing company. This machine is quite old ( 10 years or so ), but
originally was worth about $90,000. The company that made this device no
longer supports it.

I have managed to repair a couple of minor problems caused by lightning
strikes in the immediate area of the building. Now the machine will perform
all local functions and self tests. However there is no communications with
the computer. I am quite sure that the problem now is with the receivers and
line drivers to the port that communicates with the computer. We have no
schematics of the machine, and no support from the manufacturer.

An examination of the layout of the main board suggests that there are one
of four possible IC's that are closely connected to the computer cable as it
enters the machine. However I cannot identify these chips. Here are the
numbers on these IC's:
9509N this is the most likely culprit
Click to expand...

9509 sounds more like a date code if the machine is about 10 years
old.


L293E
L297
4N206

I would be very gratefull for any info on any of these chips especially the
9509N. What type of chip, what is its function, a lead to an available
substitute would be fantastic!

I apologize for the length of this post.

Charles Douglas

warrior@rideau.net
Click to expand...
 
On Sun, 13 Jun 2004 00:31:41 +1000, "Phil Allison"
<philallison@tpg.com.au> wrote:

"Chuck Douglas"


** Why is it that tedious bloody idiots like you leave out:


1. The make, model and country of origin of the machine the part/s come
from.

2. The brand names/logos printed on the part/s concerned.

3. The type of package and number of pins.


Is it just to make identification as near to fucking impossible as can be
???



BTW I know you have posted this same query on other NGs.
Click to expand...
And this is the only NG that has a reply such as yours.

........... Phil
Click to expand...
 
On Sat, 12 Jun 2004 10:08:46 -0400, "Chuck Douglas" <warrior@rideau.net> wrote:

I have a problem and don't know where to look for a solution. We just had a
very humungous lightning storm here in Ontario Canada. It wiped out a large
computer driven XY plotting router. This is the main machine in a small sign
manufacturing company. This machine is quite old ( 10 years or so ), but
originally was worth about $90,000. The company that made this device no
longer supports it.

I have managed to repair a couple of minor problems caused by lightning
strikes in the immediate area of the building. Now the machine will perform
all local functions and self tests. However there is no communications with
the computer. I am quite sure that the problem now is with the receivers and
line drivers to the port that communicates with the computer. We have no
schematics of the machine, and no support from the manufacturer.

An examination of the layout of the main board suggests that there are one
of four possible IC's that are closely connected to the computer cable as it
enters the machine. However I cannot identify these chips. Here are the
numbers on these IC's:
9509N this is the most likely culprit
L293E
L297
4N206

I would be very gratefull for any info on any of these chips especially the
9509N. What type of chip, what is its function, a lead to an available
substitute would be fantastic!

I apologize for the length of this post.

Charles Douglas

warrior@rideau.net
Click to expand...
Are there any other markings on the "9509N" chip? Can you post a jpeg somewhere
so we may be able to identify it for you?
Have you considered that the comms port on the PC may have been damaged?
Have you checked that the plotter may communicate with the computer on another
of the computer's comms ports?

If the "9509N" chip has been damaged, AND assuming it's a TTL <-> RS232 chip,
you may be able to rig up a replacement with a MAX232, or one of that family.

Then again, the plotter may communicate via an IEEE/HPIB-488 bus, as you haven't
mentioned what type of comms interface it uses.

What make and model is the plotter?
 
"Chuck Douglas" <warrior@rideau.net> wrote in message
news:10cm3jf8csv9190@corp.supernews.com...

An examination of the layout of the main board suggests that there are one
of four possible IC's that are closely connected to the computer cable as
it
enters the machine. However I cannot identify these chips. Here are the
numbers on these IC's:
9509N this is the most likely culprit
L293E
L297
4N206
Click to expand...
L293E & L297 are easy - they are SGS Thompson chips used for stepper motor
control.
The other 2 are a little more mysterious - you might need to provide more
details in terms of other text or logos on the chips. Also, it'd help to
provide the pin counts, and see if you can identify any of the connections

Russ.
 
"The Real Andy"
"Phil Allison"

"Chuck Douglas"

** Why is it that tedious bloody idiots like you leave out:


1. The make, model and country of origin of the machine the part/s
come
from.

2. The brand names/logos printed on the part/s concerned.

3. The type of package and number of pins.


Is it just to make identification as near to fucking impossible as can
be
???


BTW I know you have posted this same query on other NGs.


And this is the only NG that has a reply such as yours.
Click to expand...

** I see at least four replies so far asking for logo and pin number
details of the devices.

If posters would just have the courtesy to supply the info they have
sitting right in front of them !!!




............... Phil
 
On Sun, 13 Jun 2004 12:44:14 +1000, "Phil Allison"
<philallison@tpg.com.au> wrote:

"The Real Andy"
And this is the only NG that has a reply such as yours.

** I see at least four replies so far asking for logo and pin number
details of the devices.
Click to expand...
But they probably didn't call him a "tedious bloody idiot"?

A site which may be of some help to you is:
http://www.chipdocs.com/logos/logotypes.html

It contains images of many manufacturers logos and much
other data on ICs.

Mike Harding
 
"Chuck Douglas" <warrior@rideau.net> wrote in message
news:10cm3jf8csv9190@corp.supernews.com...
I have a problem and don't know where to look for a solution. We just had
a
very humungous lightning storm here in Ontario Canada. It wiped out a
large
computer driven XY plotting router. This is the main machine in a small
sign
manufacturing company. This machine is quite old ( 10 years or so ), but
originally was worth about $90,000. The company that made this device no
longer supports it.

I have managed to repair a couple of minor problems caused by lightning
strikes in the immediate area of the building. Now the machine will
perform
all local functions and self tests. However there is no communications
with
the computer. I am quite sure that the problem now is with the receivers
and
line drivers to the port that communicates with the computer. We have no
schematics of the machine, and no support from the manufacturer.

An examination of the layout of the main board suggests that there are one
of four possible IC's that are closely connected to the computer cable as
it
enters the machine. However I cannot identify these chips. Here are the
numbers on these IC's:
9509N this is the most likely culprit
L293E
L297
4N206

I would be very gratefull for any info on any of these chips especially
the
9509N. What type of chip, what is its function, a lead to an available
substitute would be fantastic!

I apologize for the length of this post.

Charles Douglas

warrior@rideau.net
Click to expand...
9509N quite possibly MM9509N by National Semiconductor. Unfortunately could
not find data and part is obsolete. Google search does however turn up
vendors who may have part available.

This number is familiar from the point of view that the numbering scheme was
common in the 70's for interface chips......

Good luck.

Richard.


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