No.086 - Keithley 2001 7.5 digit Multimeter Repair - Part 1

Подписаться 20 тыс.

Просмотров 18 тыс.

50% 1

I picked up a faulty Keithley 2001 7.5 digit Multimeter quite cheap and was hoping for an in-depth repair.....it hasn't disappointed so far!
In this video I look over the meter, make a few observations then set to work repairing the digital board.
Part 1:
• No.086 - Keithley 2001...
Part 2:
• No.087 - Keithley 2001...
Part 3:
• No.089 - Keithley 2001...
Part 4:
• No.090 - Keithley 2001...
Part 5:
• No.091 - Keithley 2001...
Part 6:
• No.092 - Keithley 2001...
Visit my website for lots more - www.ianjohnston.com
Help me make more of these videos:
Pledge using Patreon - / iansjohnston
Donate using PayPal - www.paypal.me/IanSJohnston

Опубликовано:

10 мар 2022

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 117

@reps 2 года назад

Very nice! It's rare not to find any leaky caps, congrats 🎉

@PeterCut62 2 года назад

Very impressive how you troubleshoot this digital board.

@reallyniceaudio 2 года назад

Oh boy why did I watch this video? I have a 2015 and a 2001 both second hand. I should man up and at least eyeball the caps. Epic repair video - can't wait till part 2!

@sdgelectronics 2 года назад

Glad the hot air gun attachment worked so well. Makes you wonder what happened though!?

@alpcns 2 года назад

That thing received some serious abuse, it appears, even if it looks very good inside. Amazing job! Looking forward to the next episode. That will be a fantastic instrument.

@davidv1289 2 года назад

Excellent work! I have my fingers crossed hoping there aren't too many more issues! I was lucky enough to pick up an HP 4338A Milliohmmeter a while back (cheap -$270 US) that is really helpful in situations like this. Looking forward to part 2.

@siliconjunkie7297 2 года назад

Those inverter transistors being blown is very worrying, it would take a lot more than a few extra volts to take them out. Good luck with this, I will watch your progress with keen interest. If the same 5v line is shared with the analogue board then I would do a quick resistance check on that as well, If you find shorts to ground then I think you need to reassess.

@allthegearnoidea6752 2 года назад

We must be mad to try and fix these things. Unfortunately I’m just the same. I would have check that capacitor to ground in the crystal circuit

@raymiller5738 2 года назад

Have to think any device connected to the 5V supply has been extremely stressed and it's days are numbered. May be worth replacing as many silicon fuses as are easy and cheap to get. Very brave to takle this repair and good luck, look forward to next installment. Impressive job so far, and agree the IR camera is priceless.

@TomFynn

Years ago I worked with its Big Brother, the Keithley Electrometer. Sub pA current detection. To my mind it was just black magic.

@mr1enrollment 2 года назад

Ian, just noticed your channel. I am a retired EE and I pride myself on troubleshooting.

@feedback-loop 2 года назад

wow! that was an in-depth repair indeed. good luck!

@DextersTechLab 2 года назад

Wow you certainly picked up a basket case there! OMG the soldering on that IC was horrific! Good luck for the next part!

@Evergreen64

I'm impressed at how you were able to remove the processor. It's nice to have an adapter to make that so much easier. Also the trick about how many layers the board has was neat too.

@AndySpicer 2 года назад

You certainly did get a great deal on this. Well done. The repair is going really well. That was a lot of faults to find. I need to start using the power to ground resistance more thoroughly. That’s a powerful technique.

@followthetrawler 2 года назад

Really looking forward to PT2

@nikmilosevic1696 2 года назад

Epic repair this one has turned out to be, cant wait for part two now!

@DaveAuld 2 года назад

Great effort Ian! Looking forward to Part 2! Hope it all comes good.......

@SpeccyMan 2 года назад

Fascinating stuff as always. I need content like this so I have something to keep me sane when I am not feeling well enough to be at my own workbench tinkering away. Looking forward to part 2. 👍