Hello,

Looking for a Fluke 8842A ROM binary. Chip is a 2732A and is located in
U222 near the input filter. It is a socketed part. This one is gone bad,
and the A/D watchdog keeps resetting the micro. Tried a 8840A ROM, and
while the meter comes up and runs, all the readings are high by order of
10. Reading the ROM using a variable voltage supply didn't get the job
done, but interesting to note that that has worked at times in the past
for me.

Thanks for any help/leads.

Jay

JW wrote:
Hello,

Looking for a Fluke 8842A ROM binary. Chip is a 2732A and is located in
U222 near the input filter. It is a socketed part. This one is gone bad,
and the A/D watchdog keeps resetting the micro. Tried a 8840A ROM, and
while the meter comes up and runs, all the readings are high by order of
10. Reading the ROM using a variable voltage supply didn't get the job
done, but interesting to note that that has worked at times in the past
for me.

Thanks for any help/leads.

Jay

If you get no help here you could try joining the Tech Tools mail list
and posting there. Email me for the link - a small group of
video/pinball techies that help each other out with test gear.

I suspect there are Fluke forums out there though that might work better.

I don't have the meter in question.

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

"JW" wrote in message
...
Hello,

Looking for a Fluke 8842A ROM binary. Chip is a 2732A and is located in
U222 near the input filter. It is a socketed part. This one is gone bad,
and the A/D watchdog keeps resetting the micro. Tried a 8840A ROM, and
while the meter comes up and runs, all the readings are high by order of
10. Reading the ROM using a variable voltage supply didn't get the job
done, but interesting to note that that has worked at times in the past
for me.

Thanks for any help/leads.

Jay

Hi Jay,


Did you ever find a copy of this ROM? If not, I have an 8842A and can copy
the ROM. I am in need of a copy of the 8840 ROM if you still have it.

Regards,
Tom

On Mon, 1 Nov 2010 13:48:55 -0400 "tm"
wrote in Message id: :


"JW" wrote in message
.. .
Hello,

Looking for a Fluke 8842A ROM binary. Chip is a 2732A and is located in
U222 near the input filter. It is a socketed part. This one is gone bad,
and the A/D watchdog keeps resetting the micro. Tried a 8840A ROM, and
while the meter comes up and runs, all the readings are high by order of
10.

Correction: Actually the readings were off by a magnitude of 100.

Reading the ROM using a variable voltage supply didn't get the job
done, but interesting to note that that has worked at times in the past
for me.

Thanks for any help/leads.

Jay

Hi Jay,


Did you ever find a copy of this ROM? If not, I have an 8842A and can copy
the ROM. I am in need of a copy of the 8840 ROM if you still have it.

Hi Tom,

Yes, I still need it. Check your email, I sent the 8840A binary to your
valid email address. You can send the binary to my Yahoo account.

Thanks, I'll be glad to get this meter off my repair shelf.

"John Robertson" wrote in message
news:q1too.1046$u9.530@edtnps82...
JW wrote:
Hello,

Looking for a Fluke 8842A ROM binary. Chip is a 2732A and is located in
U222 near the input filter. It is a socketed part. This one is gone bad,
and the A/D watchdog keeps resetting the micro. Tried a 8840A ROM, and
while the meter comes up and runs, all the readings are high by order of
10. Reading the ROM using a variable voltage supply didn't get the job
done, but interesting to note that that has worked at times in the past
for me.

Thanks for any help/leads.

Jay

If you get no help here you could try joining the Tech Tools mail list and
posting there. Email me for the link - a small group of video/pinball
techies that help each other out with test gear.

I suspect there are Fluke forums out there though that might work better.

I don't have the meter in question.

John :-#)#

Hello John,

I am jumping in here to add to Jay's request. He is working on a 8842A. I
have a 8842A/AC and sent him a copy of the ROM. Unfortunately, it did not
work as mine was a different version. He sent me the code for the 8840A but
it did not work either as the unit I have is the 8840A/AC.

Bottom line is we are both looking for ROM images for different versions.
You mentioned the tech group that may be of help. Could you let Jay or me
know that info? My address is tmiller - at - skylinenet . net.


Best regards,
Tom

On Tue, 2 Nov 2010 15:13:29 -0400 "tm"
wrote in Message id: :


"John Robertson" wrote in message
news:q1too.1046$u9.530@edtnps82...
JW wrote:
Hello,

Looking for a Fluke 8842A ROM binary. Chip is a 2732A and is located in
U222 near the input filter. It is a socketed part. This one is gone bad,
and the A/D watchdog keeps resetting the micro. Tried a 8840A ROM, and
while the meter comes up and runs, all the readings are high by order of
10. Reading the ROM using a variable voltage supply didn't get the job
done, but interesting to note that that has worked at times in the past
for me.

Thanks for any help/leads.

Jay

If you get no help here you could try joining the Tech Tools mail list and
posting there. Email me for the link - a small group of video/pinball
techies that help each other out with test gear.

I suspect there are Fluke forums out there though that might work better.

I don't have the meter in question.

John :-#)#

Hello John,

I am jumping in here to add to Jay's request. He is working on a 8842A. I
have a 8842A/AC and sent him a copy of the ROM. Unfortunately, it did not
work as mine was a different version. He sent me the code for the 8840A but
it did not work either as the unit I have is the 8840A/AC.

Bottom line is we are both looking for ROM images for different versions.
You mentioned the tech group that may be of help. Could you let Jay or me
know that info? My address is tmiller - at - skylinenet . net.

Hi Tom,

I just did a binary compare between the ROM that was in my 8842A and the
binary you sent me. They match. So it looks like my ROM is not bad, but
somebody has been screwing around in this unit before I got it. I suspect
that the micro-controller was swapped, and that the one that was put into
it is a incorrect version (It is marked V2.3)

The spare piggy-back Z8 I have lying around also has a V2.3 ROM installed
on it. If you can find a Z8 I could send you the matching 2.3 code that
goes into the 2732 chip, giving you both a U222 V2.3 and a micro version
2.3. If your meter begins working then that would go a long way in
figuring out whether the code in both chips must be the same revision.

"JW" wrote in message
...
On Tue, 2 Nov 2010 15:13:29 -0400 "tm"
wrote in Message id: :

Hi Tom,

I just did a binary compare between the ROM that was in my 8842A and the
binary you sent me. They match. So it looks like my ROM is not bad, but
somebody has been screwing around in this unit before I got it. I suspect
that the micro-controller was swapped, and that the one that was put into
it is a incorrect version (It is marked V2.3)

The spare piggy-back Z8 I have lying around also has a V2.3 ROM installed
on it. If you can find a Z8 I could send you the matching 2.3 code that
goes into the 2732 chip, giving you both a U222 V2.3 and a micro version
2.3. If your meter begins working then that would go a long way in
figuring out whether the code in both chips must be the same revision.

Hi Jay,

I started a thread up on the Tekscopes group about this topic. You might hop
over there and add to the discussion. It seems there are several versions of
the Z-8 firmware and they don't match the EPROM versions.

Tom