Tektronix P6202 FET voltage probe tip problem


GeorgeP
 

I've put pics in a folder of the same name which show my probe and the damage I am trying to deal with.
The P6202 has a different tip than other Tek miniature probes. Mine has something stuck in the socket that the replacement 206-0230-01 (or -03) tip would go into, if I could even find one.
Has anyone fixed a damaged socket on the tip of a P6202?
I am thinking the "ideal way" to replace it would be to replace the socket? I cannot possibly grab the end of what is stuck in the socket. The micrograph shows a socket about 1mm in diameter, way bigger than the tips of my smallest pliers. It's TINY.
The only other pics of P6202 here on Tekscopes (that I can find) show the PCB with no tip socket.
How important is the "special tool" that I read is a part of the Tek tip replacement kit? This tip pulls out axially but that's hard to do when the metal prong is broken off. Pic of what was left in mine is in the folder.
From what I read here, my P6202 with the power supply is a preferred device and I would love for mine to work or for it to go to someone who can make it so.
I am in Canada.
If I do find tips and fix the socket, anyone else here to share a lot? I don't need 10.
Thanks for any advice, offers, suggestions.
George Plhak


GeorgeP
 

I have added three more close ups of the tip socket in the Photos folder here at TekScopes named "Tektronix P6202 FET voltage probe tip problem "

Someone asked me in an email if I could put a link. I wish I knew how. I don't think I can link to a pic that I've posted. I am new again to Tekscopes. I don't know how. But you will find almost 20 good pics of a P6202 Fet probe that will hopefully help me or someone else in future deal with a damaged tip socket.

The socket seems to have a U tab that straddles the end of the PCB. It is probably hard soldered in a jig. Likely the socket is closed at the bottom to prevent wicking. The small teflon? washer is slightly loose on the body of the socket but doesn't come off. I can see what I think is the FET and a couple of surface mount resistors? one of which is adjacent to the solder pad for the tip socket.

Pics show an object, probably a broken off piece of wire, round in a square hole. Too small and too deep to grab.

I don't know how to deal with this.


Siggi
 

On Mon, Apr 15, 2019 at 9:19 AM GeorgeP <george@ffwdm.com> wrote:

I have added three more close ups of the tip socket in the Photos folder
here at TekScopes named "Tektronix P6202 FET voltage probe tip problem "

Someone asked me in an email if I could put a link. I wish I knew how. I
don't think I can link to a pic that I've posted. I am new again to
Tekscopes. I don't know how. But you will find almost 20 good pics of a
P6202 Fet probe that will hopefully help me or someone else in future deal
with a damaged tip socket.

The socket seems to have a U tab that straddles the end of the PCB. It is
probably hard soldered in a jig. Likely the socket is closed at the bottom
to prevent wicking. The small teflon? washer is slightly loose on the body
of the socket but doesn't come off. I can see what I think is the FET and a
couple of surface mount resistors? one of which is adjacent to the solder
pad for the tip socket.

Pics show an object, probably a broken off piece of wire, round in a
square hole. Too small and too deep to grab.

I don't know how to deal with this.





Harvey White
 

On Mon, 15 Apr 2019 06:19:18 -0700, you wrote:

I have added three more close ups of the tip socket in the Photos folder here at TekScopes named "Tektronix P6202 FET voltage probe tip problem "

Someone asked me in an email if I could put a link. I wish I knew how. I don't think I can link to a pic that I've posted.
Go to the picture you've posted, open it in your browser. In the
address field of the browser window (which changes to where you are),
select and highlight the complete address.

Go back to your email and paste that in.

That's one way to do it.

I am new again to Tekscopes. I don't know how. But you will find almost 20 good pics of a P6202 Fet probe that will hopefully help me or someone else in future deal with a damaged tip socket.

The socket seems to have a U tab that straddles the end of the PCB. It is probably hard soldered in a jig. Likely the socket is closed at the bottom to prevent wicking.
These sockets are indeed closed at the bottom. They're meant to be
put into a PC board and soldered in to lower the profile of whatever
chip (or part) is inserted into them.


The small teflon? washer is slightly loose on the body of the socket but doesn't come off. I can see what I think is the FET and a couple of surface mount resistors? one of which is adjacent to the solder pad for the tip socket.
The teflon washer is likely meant to keep the probe tip from grounding
out against the outer probe body.


Pics show an object, probably a broken off piece of wire, round in a square hole. Too small and too deep to grab.

I don't know how to deal with this.
One would be to replace the socket.

Another would be to remove the socket, go to a room without much in
it, grasp the socket firmly (but gently) with pliers, and then bang
the pliers sharply against a block of wood. If the obstruction goes
away, you're lucky.

A question is to ask if you are sure that the socket is obstructed. It
has to have a set of contacts in it. Take a sewing needle or pin of
the right diameter (I measured 0.030 on the tip of my P6202), and see
if it is obstructed. The needle should bottom out gently.

if a simulated probe tip fits in, there may not be an obstruction. I'm
rather puzzled how something could break inside the socket. I've seen
many broken tips, but they all die at the junction of the external tip
and the replaceable body.

If you can't clear it out, and you're willing to take a chance, I have
a few sockets that a probe tip will slide into. You'd have to be
willing to remove the socket and replace it, though.

Harvey






GeorgeP
 

Wow! Good ideas! Thank you for the thoughts Harvey! Will report back.


GeorgeP
 

And for the advice about adding links!


Renée
 

Thanks for the link Siggi.
George-
looks like the tip (point) base was left in the hole? Is the tip rear intact when it was removed? or did probe arrive in this condition?
I see a few options,  removal of material most likely will mean removal of the socket then work in a lathe/mill,  possible replacement with a new/modified/socket from a IC socket, I would have to have it in hand to see what else comes to mind, but it looks doable. just time consuming.

 hmmm i wonder if a water jet might be used??? Is the "broken wire" "loose" in the hole???

oh yes- resistors a cap then directly to the FET, look at the schematics....definite removal to prevent damage to the FET(s)
Renée

On 2019-04-15 6:52 a.m., Siggi wrote:
Here's a link to the album: https://groups.io/g/TekScopes/album?id=89499.

On Mon, Apr 15, 2019 at 9:19 AM GeorgeP <george@ffwdm.com> wrote:

I have added three more close ups of the tip socket in the Photos folder
here at TekScopes named "Tektronix P6202 FET voltage probe tip problem "

Someone asked me in an email if I could put a link. I wish I knew how. I
don't think I can link to a pic that I've posted. I am new again to
Tekscopes. I don't know how. But you will find almost 20 good pics of a
P6202 Fet probe that will hopefully help me or someone else in future deal
with a damaged tip socket.

The socket seems to have a U tab that straddles the end of the PCB. It is
probably hard soldered in a jig. Likely the socket is closed at the bottom
to prevent wicking. The small teflon? washer is slightly loose on the body
of the socket but doesn't come off. I can see what I think is the FET and a
couple of surface mount resistors? one of which is adjacent to the solder
pad for the tip socket.

Pics show an object, probably a broken off piece of wire, round in a
square hole. Too small and too deep to grab.

I don't know how to deal with this.





GeorgeP
 

I've added another pic of the tip with the socket now removed. https://groups.io/g/TekScopes/photo/89499/0?p=Created,,,20,2,0,0
Keystone makes similar sockets. 0.032" seems to be a popular size. https://www.keyelco.com/userAssets/file/M65micro-jacks.pdf
Now that i have the socket off the board there is less hazard to the probe while I work on the socket.
I will definitely need to jig it to solder it back.
The teflon washer just pops off the smaller end of the socket.
Thanks to everyone for interest and support! :)
George


GeorgeP
 

I liked the idea of using inertia so I made a mouse trap into a pin debris remover. The P6202 socket is going into the hole I am drilling
https://groups.io/g/TekScopes/photo/89499/2?p=Created,,,20,2,0,0

I drilled a much larger hole underneath so the debris had somewhere to go
https://groups.io/g/TekScopes/photo/89499/1?p=Created,,,20,2,0,0

The socket pin is temporarily soldered to the PCB at O. Many snaps of the trap later, about two dozen, until it started to fall apart. I thought something had come out of the hole but a 0.020 wire still does not enter the socket hole at all.
https://groups.io/g/TekScopes/photo/89499/0?p=Created,,,20,2,0,0

I don't know if I said this but Keystone makes similar sockets. 0.032" seems to be a popular size. https://www.keyelco.com/userAssets/file/M65micro-jacks.pdf


Renée
 

George-
I have been thinking of where the wire may have originated, I looked at my 6202A and realized it might be the "feed through" wire to the replaceable tip.
If that is the case then the (working part) tip will obviously not have a connection when assembled. I am thinking the barrel is spun/threaded on to the body and after many on/off assemblies that wire was left in the circuit board receptacle, one MIGHT be able to re-use the old broken tip backwards as a replacement socket after removing the plastic from broken tip. better look down the inside of the barrel to see if the feed through is still there. If not then now there are two issues. one removal of wire from socket and replacement of feed through.
Renée
ps i am looking for the slip on retractable hook is someone has an orphan....pm me. k6fsb.1 at the gmail thing

On 2019-04-15 9:11 a.m., GeorgeP wrote:
I've added another pic of the tip with the socket now removed. https://groups.io/g/TekScopes/photo/89499/0?p=Created,,,20,2,0,0
Keystone makes similar sockets. 0.032" seems to be a popular size. https://www.keyelco.com/userAssets/file/M65micro-jacks.pdf
Now that i have the socket off the board there is less hazard to the probe while I work on the socket.
I will definitely need to jig it to solder it back.
The teflon washer just pops off the smaller end of the socket.
Thanks to everyone for interest and support! :)
George



Harvey White
 

On Tue, 16 Apr 2019 17:12:11 -0700, you wrote:

George-
I have been thinking of where the wire may have originated, I looked at
my 6202A and realized it might be the "feed through" wire to the
replaceable tip.
To me, that would make sense if the wire went through to a contact
inside the socket.

The sockets I have are sealed at the bottom.


If that is the case then the (working part) tip will obviously not have
a connection when assembled. I am thinking the barrel is spun/threaded
on to the body and after many on/off assemblies that wire was left in
the circuit board receptacle, one MIGHT be able to re-use the old broken
tip backwards as a replacement socket after removing the plastic from
broken tip. better look down the inside of the barrel to see if the feed
through is still there. If not then now there are two issues. one
removal of wire from socket and replacement of feed through.
If they did it that way, then it makes sense. Not sure that they did.
another explanation may be that someone broke the tip (at first), then
decided that they wanted the probe to work, so they stuffed a wire
into it.

That broke...

Harvey


Renée
ps i am looking for the slip on retractable hook is someone has an
orphan....pm me. k6fsb.1 at the gmail thing

On 2019-04-15 9:11 a.m., GeorgeP wrote:
I've added another pic of the tip with the socket now removed. https://groups.io/g/TekScopes/photo/89499/0?p=Created,,,20,2,0,0
Keystone makes similar sockets. 0.032" seems to be a popular size. https://www.keyelco.com/userAssets/file/M65micro-jacks.pdf
Now that i have the socket off the board there is less hazard to the probe while I work on the socket.
I will definitely need to jig it to solder it back.
The teflon washer just pops off the smaller end of the socket.
Thanks to everyone for interest and support! :)
George






GeorgeP
 

Thanks Harvey. I studied things a bit more and decided to give up. The FET probe is on Ebay as Parts/repair with missing probe socket. I tried to list it factually. I hate giving up but sometimes it is necessary.


Harvey White
 

On Wed, 17 Apr 2019 08:15:35 -0700, you wrote:

Thanks Harvey. I studied things a bit more and decided to give up. The FET probe is on Ebay as Parts/repair with missing probe socket. I tried to list it factually. I hate giving up but sometimes it is necessary.
You're welcome. Glad to be of help. The probe is nice, good for full
bandwidth on a 7A19 or 7A29. I prefer 7A29's because I think they're
less prone to damage. The 7A24, which is good, has somewhat less
bandwidth. Things like the 7A26 have a decent bandwidth, but still
(at times) better than the average passive probe.

Harvey