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Boris Mohar
Guest
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 Posted:
Sat Jan 15, 2005 6:09 pm Post subject:
HP 3470A / 3472A Multimeter dead |
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Hello,
My favorite piece of nostalgia suddenly stopped working. The +5V and other
supplies are ok. The display is blank except for the decimal point. The
clock is working but the IC it passes the signal to does nothing with it. I
assume that it is a divider of some sort. It has proprietary Motorola number
1820 -0567 I know it is a long shot but maybe one of you know.
--
Boris Mohar
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Jim Adney
Guest
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| Posted:
Sun Jan 16, 2005 12:33 pm Post subject:
Re: HP 3470A / 3472A Multimeter dead |
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On Sat, 15 Jan 2005 07:09:36 -0500 Boris Mohar
<borism_-void-_@sympatico.ca> wrote:
| Quote: | My favorite piece of nostalgia suddenly stopped working. The +5V and other
supplies are ok. The display is blank except for the decimal point. The
clock is working but the IC it passes the signal to does nothing with it. I
assume that it is a divider of some sort. It has proprietary Motorola number
1820 -0567 I know it is a long shot but maybe one of you know.
|
That's the HP part #, and I show a cross for it to a MC4024P, a "dual
voltage controlled FF," which you may or may not be able to track down
or sub.
-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
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Boris Mohar
Guest
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| Posted:
Sun Jan 16, 2005 7:37 pm Post subject:
Re: HP 3470A / 3472A Multimeter dead |
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On Sun, 16 Jan 2005 00:33:40 -0600, Jim Adney <jadney@vwtype3.org> wrote:
| Quote: | On Sat, 15 Jan 2005 07:09:36 -0500 Boris Mohar
borism_-void-_@sympatico.ca> wrote:
My favorite piece of nostalgia suddenly stopped working. The +5V and other
supplies are ok. The display is blank except for the decimal point. The
clock is working but the IC it passes the signal to does nothing with it. I
assume that it is a divider of some sort. It has proprietary Motorola number
1820 -0567 I know it is a long shot but maybe one of you know.
That's the HP part #, and I show a cross for it to a MC4024P, a "dual
voltage controlled FF," which you may or may not be able to track down
or sub.
-
Thanks, it is worse than that. I did some more digging and the culprit is |
dead 1820-0798. This is a proprietary six decade counter for which there is
no sub. If anyone has one I would like to hear from them.
Regards,
Boris Mohar
Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca
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Jim Adney
Guest
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| Posted:
Tue Jan 18, 2005 4:50 am Post subject:
Re: HP 3470A / 3472A Multimeter dead |
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On Sun, 16 Jan 2005 08:37:22 -0500 Boris Mohar
<borism_-void-_@sympatico.ca> wrote:
| Quote: | On Sun, 16 Jan 2005 00:33:40 -0600, Jim Adney <jadney@vwtype3.org> wrote:
On Sat, 15 Jan 2005 07:09:36 -0500 Boris Mohar
borism_-void-_@sympatico.ca> wrote:
My favorite piece of nostalgia suddenly stopped working. The +5V and other
supplies are ok. The display is blank except for the decimal point. The
clock is working but the IC it passes the signal to does nothing with it. I
assume that it is a divider of some sort. It has proprietary Motorola number
1820 -0567 I know it is a long shot but maybe one of you know.
That's the HP part #, and I show a cross for it to a MC4024P, a "dual
voltage controlled FF," which you may or may not be able to track down
or sub.
Thanks, it is worse than that. I did some more digging and the culprit is
dead 1820-0798. This is a proprietary six decade counter for which there is
no sub. If anyone has one I would like to hear from them.
|
I could use some, too. I show no sub for it either.
Have you googled on that number? Also, try
http://www.sphere.bc.ca/test/
He has some of these proprietary HP ICs.
-
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Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
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