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- Опубликовано: 20 окт 2024
- In my previous video this scope was repaired by replacing its motherboard with a similar one that was found on eBay. In this episode the original Intel D865 motherboard was repaired and recapped.
Previous episode: • #122 - Tektronix TDS50...
Forum: www.eevblog.co...
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Thanks for lots of useful information.
I just pull some of those solid type poly caps from my 3rd gen motherboard, and the values were out a bit. ESR was around 1ohm, but the 820uF was 760, and the 560 was 480. If you look at the life span graph of solid Vs electro, the solid last a lot longer at cool temps, but not any longer at high temps. The replacements from Ali were spot-on for values.
I've found that de-soldering capacitors can often (temporarily) reform them. So the actual capacitance and ESR they had when on the PCB was probably much worse.
Oh I definitely need some of those soldering iron tweezers!
Great job, always good to keep a backup board with this equipment. Just in case
You should have checked the 10mm VRM high capacitors as well. They look like Nichicon HM series, which had a manufacturing defect up to around 2006. The Nichicon VRM low capacitors you checked were Nichicon HN, which were also affected during that time. Ideally, you should replace all the Nichicon HM/HN with polymer capacitors (HM/HN/HZ have been out of production for more than 5 years, anything sold as them are counterfeit). You can safely drop quite a bit in capacitance because the overall ripple suppression rating for these VRMs of that time was more important than overall capacitance.
Good call on not using a higher-ESR part though.
Don't forget to migrate the drive to SSD or make a hard copy :)
Great vid but I have never seen those tweezers in use, I get the theory but practice can be different ! perhaps you can film it ?....cheers.
They are compesated lead, for precise mesurment.
Kelvin klips
@@ljubomirculibrk4097 I was talking about the soldering tweezers used for the removal of SMD components.
Nice job.
I NEED SOME OF THOSE TWEEZERS!!!!!
well done 👍👍👍👍👍
Thanks In Advance...!!! ;)
Hi Feedback Loop. I’ve been watching your repair videos and noticed that you order a lot of parts from China. Do you have specific items you will or will not order from China? How do you avoid counterfeit or fake semiconductor. Is there a site you trust or is you feeling: ‘pay your money take your chances.
good job as usuall and great fix. Do u have any videos about designing a small signal audio amp for 1-4 watt speakers?
Good work. With respect to the capacitors, I thought that capacitance and ESR for electrolytics were normally specced with measurement at 120 Hz. Does your meter not provide 120Hz measurements?
It does, but the default is 1KHz, and I kept it that way. It still gives a good picture especially in comparison.
@@feedback-loop Thank you so much! It’s a great video again, I have a question that is not relative to this video. I am reading the Specifications and Performance Verification of TSG4106A, I understand most of the parts but “Output level accuracy (IQ
modulation relative to CW)” part (on page 21). Even I have tried to read some papers relative to IQ modulation but I still can not get it. If you get a chance, could you please explain it to me?
download.tek.com/manual/TSG4100A-Series-RF-Signal-Generator-Specifications-Performance-Verification-Technical-Reference.pdf
Thanks for the video. How about upgrading the processor / memory? Do you think does it worth it?
I added one more 512MB module for dual-channel configuration because I happened to have it. I don't really want to spend more money on this.
Can you give some oscillograms in wfm format from tds 5000 - 7000 series? Preferably, together with oscillograms in jpg format.
Why does the lcr meter read a significantly lower capacitance than is specified, even on the new caps?
Large caps are rated at 100Hz, and I was a bit lazy to switch the LCR meter. It still gives a good idea anyway.
The tolerance on most electrolytics is very large anyway, typically 20%, but older types were often -25% / +100%.
1000usd osciloscope for repair 1usd motherboard nice!!!!! , you need repair 999 more! :D
Maybe the next step is to work on upgrading to SSD hard-drive!
Ssd hard drive? 🥲🥲🥲 Wtf? Sold state drive - hard drive?
We have many such historical accidents. ATM machine, for example. Not a big deal.
Correction: Solid-state drive! (SSD).
I replaced twho whole motherboard with an micro ATX one with i5 processor. It booths very fast. It has XP on it also.
Great job :) You want another project like a dead DPO7104 for repair? :)
Well, nothing is entirely out of question. Depends on the price :)
@@feedback-loop Sadly its one of my rejects with BER acquisition board. :(
@@xDevscom_EE Oh, that is what you mean. If you gave up, it must be hopeless.
Now flash that GateWay bios with the Tektronix bios and you should have another Tektronix mother board right?
Do you know how to do this?
Just back up the original bios using amiflash or another flashing utility then flash it to the new board. Should be easily done from pure dos since this guy has a floppy drive.
@@savaga78 This is Intel, not AMI. I am not sure Intel provides such tools. Perhaps I could change the splash screen, but I did not find a utility to read the existing splash screen and save it.
You should be able to change the splash screen with what utility the bios company! If its an award bios use a award utility! If it's AMI bios use an AMI Utility! and so on! I'm pretty sure if you have copy of Hirens ultimate boot disk you'll find what you need there
@@feedback-loop It's intel motherboard not bios. I know only 3 bios software companies: ami, award and phoenix. According to your prev video the bios looks very similar to ami. If you disable the splash screen you can see it
hola!! wath is you email??
My father worked at Tektronix in Beaverton , Oregon until about 1972-73 . He sold our home without telling us one summer and put the money into a hippie commune and divorced my mother . He died a few years ago . I hope oscilloscopes are continually falling on his fat head .
Лучше бы ты по русски озвучку сделал. Мой комп по субтитрам твой английский не понимает.
Good work! Enjoyed watching.