TSP

In this episode Shahriar repairs another high-voltage Tektronix probe, this time a THDP0100 which is capable of measuring 6kV signals up to 100MHz. The probe does not get detected by the scope. However, it soon becomes clear that the problem with this probe is much more involved than the previous repair.
The probe has a short-circuit inside the probe body as well as several damaged components. Each is replaced one step at a time until a final fault is also detected in the probe head. After the repair, the probe is zeroed, calibrated and used to measure a signal at 6kVpp using an Associated Research HYPOT tester.
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[@N0gtail]

Only a couple of hours? This would have stumped me for days! Good job!

[@RandomUser2401]

He clearly is on the next level..

[@DrFrank-xj9bc]

I enjoyed especially @ 10:28 hearing: ".. if it doesn't work, it's going to be thrown out of the window.."😂😂. Never heard before that you reached your frustration limit. 🖖.Well done!

[@tarheels100]

It's nice seeing the master himself get a "meaty" repair job. You know it's been tricky when you sense some frustration (albeit subtle) from Shahriar!

[@techskeet]

Beautiful video. Well explained procedure. Unfortunately, with many repairs you can not easily get the firmware that allows reprogramming. I think Pooch has really good contacts in the industry ;-)

[@rj44319]

I was thinking the same thing, how the heck did he get FW....

[@Edisson.]

@@rj44319 What fw, I will not get some components let alone fw in the Czech Republic

[@joopterwijn]

I believe he got the firmware from a viewer whom read it from a working model.

[@TC-zt1sp]

@@joopterwijn So you never heard about "lock bits"? Lucky you! I guess...

[@video99couk]

Just got in a thermal imaging camera for this sort of work. Not the sort of thing you use every day but in some cases it is fantastic.

[@jimomertz]

I hope Pooch isn’t wandering around when you have that 6kV engaged 🙀 Nice fix!

[@Thesignalpath]

He gets locked out of the lab whenever there are exposed high-voltage setups or high-power optics/lasers.

[@jimomertz]

@@Thesignalpath I figured you’d be sensible 🙂

[@lasersbee]

I like the way you hunt down a defective part. Always interesting to watch.

[@cheater00]

Niiiice, we're watching it in the Tek/HP Discord right now :)

[@TheFool2cool]

Do you have a link to the discord?

[@cheater00]

@@TheFool2cool what's your discord user name? i'll send you an invite. can't post a link.

[@NaudioElectronics]

Nice repair! If you check the 10k resistor you will see a small spot in the center.

[@Edisson.]

Perfect demonstration of professional diagnostics and subsequent repair, recently I looked at eBay after the differential probe, but in the end I did not buy it - I do not know what I would do with it if it had a similar defect. Nice day🙂Tom

[@ThermalWorld_]

We love this long videos 😁 Awesome repair ❤️

[@swebigmac100]

Excellent repair and codus for not beeing let down when it was multiple faults.

[@andymouse]

Awesome fix.....cheers!

[@lohikarhu734]

If you spent a few hours, and bought the probe as defective, vs. New price, that's a well-paid few hours. Nice... i'd be interested to see your techniques for pulling these smd parts...maybe on a previous video.

[@aliveli8650]

i follow your channel for more than 2 years. this is by far most interesting video you uploaded recently. please add more repair videos. nevertheless, solid skills, solid debugging capabilities!! respect!

[@fredflickinger643]

Good methodology and test device use for a relatively quick solution!

[@aqib2000]

How did you source the firmware to reprogram the processor?

[@stargazer7644]

Watch the other video to find out how he did the firmware. kzbin.info/www/bejne/mKbceH6cisqXpZI

[@labiadh_chokri]

Nice repair, always you deal with high frequency stuff.

[@happyhippr]

super cool

[@Trucam2020]

Thanks. Excellent video.

[@pcbden]

I wonder how resistor for data lines could fail

[@andymouse]

I have no idea but any instrument that works at 6Kv means it could be anything ! 😂

[@erikbertram6019]

It is interesting how many different problems this probe had. Do you reckon they were caused by the same event, or how does a probe end up with such a plethora of issues?

[@MoraFermi]

It could have been an ESD event on that data line -- that would definitely destroy both the resistor and the cpu, potentially the negative voltage regulator too, depending on how things are connected..

[@younesthabet]

I never knew that resistors could be the source of trouble in a repair ..

[@philipgabriel3418]

Shahriar, I enjoy the content of your videos tremendously. Do you have a presentation on protection of sensitive and valuable equipment such as spectrum analyzers, VNAs, etc from static damage? Also, one of my spectrum analyzers has 0 volts tolerance to DC. Should I always use a DC block?

[@iamgodlewski]

@Shahriar For your FLIR thermal imager here, did you use the FLIR macro lens or one of the regular lenses (24/48 fov)? Image looks super sharp and in focus from up close! Usually from this close the regular lenses lose focus quick. Curious to know, thanks.

[@xDevscom_EE]

Neat. I also scored another HVDC probe from this series, but haven't looked at it yet.

[@0xbenedikt]

When he identified the processor as the issue, I expected him to give up and throw it away as I certainly would not have expected him to have access to the firmware. If it was me, I'd then either have salvaged the processor from another dead unit or used this unit for spares.

[@Tesla811a]

The linear regulator is skewed on its pads and looks like its been reworked when you first showed it. Is that some non-linear video editing or had someone else worked on the probe before you bought it? Surprising it had so many issues.

[@CNe7532294]

I can't help but notice how that cap with 4 ohms across it is slightly crooked and has an extra bit of solder. Did it get that hot in there at some point with its failure or is that part of the editing? (was soldered for testing in a later jump-cut).

[@shams350z]

Weird question but if I want to learn more about these symmetrical power supplies for op amps where should I look ? I tried googling symmetrical supplies but didn't get that much helpful links. Thank you.

[@younesthabet]

whats the purpose of measuring the resistance of a capacitor?

[@leocurious9919]

How to fix (or know if its a SW/HW fault) a µC when you dont have the firmware? The obvious answer seems to be... you dont. But you got the FM for such specific µCs, so... I have some hope.

[@antoniocarlosmaranhao2368]

hello friend if it is possible I would like some help I have an hp agilent e8285a service monitor it is giving several error messages and version a.02.04 has already been installed do you have a procedure for me to be able to do a new installation of the software I am grateful for the help

[@shazam6274]

Why on earth would anyone spend all this time and effort to fix a 'scope probe? Oh, ...$4,300! I keep forgetting that many Tek probes cost way more than most 'scopes 😳.

[@REALIVH]

offtopic why does your channel not have a Verified mark when you have over 100k subscribers? like all others in electronic have

[@stargazer7644]

It has a verified mark

[@REALIVH]

@@stargazer7644 odd it did not show last time I was here not even in the featured video but it does now

[@stargazer7644]

@@REALIVH The wonders of youtube

[@larry785]

Probably some yahoo decided to see what his tesla coil could do to it since he didn't know how to use it properly.