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- Опубликовано: 25 мар 2017
- Dave repairs several faults in a 500MHz HP54161B 2GS/s oscilloscope.
One in particular is quite elusive, can you figure it out before Dave does?
BONUS: Sneak peak at a new Siglent SDS1000X-E Series scope!
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Наука
In case you're still wondering about all those "extra" holes in the keyboard PCB (50:00), they're required in order to do the gold plating of the membrane contacts. All of the traces are initially shorted together so that there is electrical continuity during the plating process, after which the holes are drilled in order to isolate the individual tracks.
^^ Needs more upvotes. ^^
@@0x8badf00d agreed, it got mine
instablaster...
TIL
Nothing better than a 1 hour repair vid.......... brilliant.
Glad you liked it.
Yes, quite enjoyable indeed. Whould've laughed my a** off if Dave epoxied that hybrid back together and added a few drops of conductive paint, just because. But eh, not worth it.
That feel when you have so many brand new scopes that you showcase three new scopes for no reason while troubleshoting a different, newly bought, scope. You could say that Dave (puts on glasses) is in scope acquisition mode. YEEEEEEAAAAAHH!!
Well played. That actually got a legit LOL from me.
Maybe he's into marketing mode with brymen and siglent stuff..
Nothing better than a 1 hour repair at 6:20 am! Good morning everyone!
Yeah, what a bobby dazzler!
6months after, and is 6:20 am
4 years later and it's 6:15 am
it is 12am (UTC+8)
28:03 My new ringtone for my phone and I am not even joking.
Ahaha someone beat me to it, I thought I was the only person morbid enough to think about this lol. XD
He sounds like R2D2 does when he gets zapped by something.
The Signal Path Z
ruclips.net/video/GlM6PE2kKVY/видео.html > Another one found haa haa luv the electric shocks - touchy
I thought you were going to use this 58:45
None of this Agilent rubbish! >Agilent logo on the handle..
i was just about to say
0:05
Scrolled down if someone noticed it... sure enough. :D
Abel Lujan >came here to comment that< >am too late
Thoroughly enjoyed the whole hour, thanks Dave :)
Thanks.
It's always a good feeling to track a fault down to a physical problem like that. I remember when i was a kid in school and the Pioneer car stereo in my first car crapped out, so I took it apart and traced the fault to a crack in the PCB, repaired the affected traces, and hey presto, working stereo again! I was pretty pleased. PS: full 1080p here no issues.
Thats our Dave - playing a few hours with scopes and signals before considering to trace that crusty PCB. ;-)
Yeah lol - as soon as I saw that cracked lid - the answer was there at the start. But it was worth it for the educational stuff covered from looking at other possible causes. We all learn from mistakes - even other peoples ;)
good shout.
+GadgetUK164 My thought too - fresh-looking mechanical damage outside and a fault ticket usually means mechanical damage inside too.
BTW did anyone else go back to the first clear shot of the cracked PCB and wonder why the lighting/angle was such that you couldn't see the damage? Could Dave have spotted it very early on, decided that would lead to too short a video and so went off around the houses?
I will totally try to at least open this hybrid ceramic. It's broken anyway, so maybe heat it up with airgun, look for insides, maybe regular glue + conductive glue can make it sorta work(maybe you can even solder those traces together with solderpaste and reflow). Give it a try, Dave!
Thoroughly enjoyed.
Come on though Dave a little grinding with a Dremel on that ceramic package and I am sure you could get a bodge wire to bridge it over the crack after repairing the substrate with super glue!
Give it a go!
Yeah... I was thinking about a dremel too, it may work..
Glad to see a repair. Don't see them too often. They are the main videos I like to watch. Maybe the scope was dropped - that could be the reason the front panel had a broken piece on it! Good video!
Dave,
You got me super interested with this repair, old school cpu address lines being used to strobe the controls, very similar to the old keyboard reading method in 8 bit computers.
I thought about the 74LS2XX bus transcevers as well, old school :-D
Fascinating video. Love these long repair videos. Better than any TV drama!!
You knew. You showed us everything. How could you do a proper instructional if you just jumped on the problem? You took us on the journey of how this scope is built. Thank You. My eyes have never been more open. You are an awesome teacher. Isn't "dumpster diving" so rewarding? I know this scope was not a dumpster find. It is amazing what people throw away. Oh, well. Good for us! :-)
This was the most exciting hour of video I've seen this week! Seriously, the excitement of finding the crack in the PCB was felt in my home also!
Great demonstration of troubleshooting techniques
Nice to see a 68000 still in action once in a while.
Good repair, Dave! Cheers!
This is exactly the kind of content I LOVE to see on your channel! I enjoyed every minute. Thank you, Dave! Please keep on doing this great work.
As I've mentioned previously, I studied electrical engineering from 1993-1999, and I haven't touched an oscilloscope since then. That particular model brings back memories of school, and how I absolutely despised my circuits classes. It took almost 20 years and RUclips to make me like electronics again, but I won't be quitting my day job writing embedded software. Electronics is strictly a fun hobby, not to to be done in school or professionally.
Good job Dave! Nothing is better than your repair. That is the best practice for all of us.
Good fun Dave, thanks. I think that you found that fairly quickly. Good detective work. Though it's always an idea to flex or apply pressure to a board in various places with a suitable prodder whilst twiddling unresponsive knobs, or whatever. Some boards you just know will be trouble. Any that get user strain, or those that have heavy components or are flexy....or worst of all a flexy board with a heavy item getting user strain - with crappy solder (all 80s 90s TV sets).
Great job. I love watching your testing and teardowns.
This was awesome to watch! Just blown away that the CRT has survived whatever shock went through the unit when it was dropped...
For the crack on the PCB that was not a drop, that seems to be a punch on the rotaries, may be was having a bad day? 😂
I noticed that you have your new EEVblog multimeter and looking forward to the review.
This is great. I scored one of these at my college when they cleaned out surplus equipment. It's what got me into electronics.
Fantastic video!
Your repair vids are great. Well paced and i only fell asleep once. Keep up the good work.
Thanks Dave. I've had my share of cracks n jump wire adventures. Congrats on find! Cheers!!
Used an HP54161B long ago bought it from the company once they cleared all their hardware. A very nice piece of equipment.
Really enjoyed that Dave. Nothing quite like seeing the process from start to successful finish. Would make a great scope for anyone now- even if its left as single channel. Cheers!
Wow, great repair, and the display on that Siglent scope is pretty beautiful for an entry-level model.
Repair/troubleshoot vids are my fave.Thumbs up or sure!
Great job, Dave! That was tough unit, especially given all the DIFFERENT things messed up with it.
Try to find more stuff to fix.
Seeing that purple hybrid gave me cold memories (Those often drift/fail in 3458A DMMs, causing a replacement of ADC board for over a grand USD). No peaking inside cracked hybrid? Could be interesting under Tagano microscope ;)
Just wanted to say a big thanks for your vids that given me the confidence to fix the EMI caps on the 2467B that I got just as the old Rifa's let go. Not a big deal to you guys probably, but I was chuffed that I managed to fix it. Beauty, as you so rightly say!
This was AWESOME, thanks Dave!
Classic EEVblog-stuff! Yay! ^^)
That was a fun one to watch, M'Lad!
repair videos are my definite favorite. keep it up Dave
Watched the whole session! Great job.
Amazing stuff. Thank You Dave
An enjoyable journey with success at the end. Great stuff. :) You are a legend!
Excellent information in this video. Thanks for sharing
Great video. Great to see all the effort you went to.
A late feedback - but thank you for this repair - I am sitting with two of these family scopes with button and rotary issues - I got both really cheap from ebay - intending to repair and this video was really intructive, exposing the rabbit holes... :-) thank you Dave!
I had decided to study semiconductor devices lecture but than I saw this video's notification and then...... a whole hour just passed :D
Thanks Dave, you are such an inspiration for me :D
*Vielen Dank* für dieses Video!
Bei Deinen Rep. lerne ich immer wieder neues!!
Love video's like this. can't wait for more.
amazing how fast it starts up and responds.
First I see him finally repair something, even just half repair. Great video.
The connections that goes to drilled holes is to keep all the golden pads connected during production - this is used when doing the immersion gold.
zaprodk That makes a good deal of sense since they do require uninterrupted electrical connections during the gold plating operation.
Repair videos are the best! Loved it!
That was *_GREAT_* Dave!!! Thank you!!
Brillant, I want to be able to do this someday, how satisfying to watch
Finally fixed something Dave! Great video😊
One of t he best Videos for a while ...Cheers Dave.. Enjoyed it !
I recently aquired an Agilent 54615B 500MHz like this one (only 1GS/s though) and I've got to admit... I love the thing. I use it more than any of the others, lately. It was in much better condition than the one in the video and only needed a little cleaning up. It has the top mounted probe pouch, which still looks brand new, and the scope works like a dream. It doesn't appear to have been used much... none of the usual worn down labels and stuff. I got it so cheap, I'm afraid that if I mentioned the price I'd be arrested for theft. Best price on a new Hantek 50MHz scope, on feeBay, is quite a bit higher.
Great video! I enjoyed watching!
Good one Dave. The repair videos are the best.
Love these kind of videos!!
Great Video Dave! Learned a lot.
Excellent example of how troubleshooting can change your symptoms and thoroughly confuse the repairman. As an electronics technician I have seen more than my share.
Just my type of video. Excellent!
I love this scope, nice to see you taking it apart so I don't have too. So many bits ;-)
Great work Dave , as a rule for repairing I use a scope probe and push PCBs down with light pressure to see if the symptoms show any sign of dependency . I then hook onto a device that is soldered with the hook and pull board upward gently ..looking for the same . I can't tell you how many times I found stressed solder joints or cracks in board cracks normally suggest impact from my experience. It also is apparent that screws , connectors , chips with pin mounts are all mechanical areas of Faure for older boards especially if they have had some impact. Nice 👍 work
Great video Dave!
Really enjoyed the video! Very nice job.ty
Wish I had a scope that nice. Brilliant video!
Absolutely amazing.
That was really interesting. Thanks!
I like that kind of repair videos. Great job once again ...
Yay! A repair vid! Awesome.
really enjoyed that repairathon Dave. :)
winner the circuit board breakage A big bravo for this troubleshooting
Really enjoyable repair that Dave! :)
My new favorite Dave quote: "We're just viewin' the signals for kicks"
Exactly the same thing happend to the HP54600B I was transporting in the car. Front panel got a bump in the car and put a hairline fracture in the front panel pcb. A few links later and Bobby Dazzler!
Love these era HP scopes.
Ah.. this scope brings back memories. You can actually activate an easter egg and play tetris on it
Sorry for very late replay, but how u can do it?
i love thies repair videos. keep them comming
I enjoyed this video thanks!
That was a fun show... Nice work..
Nice video and explain very well thanks
Hell yeah, I love this repair videos!
Recently had a 16534a with the same hybrids and reseating them did the trick!
"Always look out for any dodgy tantalums." - Recently had one tantalum cap explode on me and found another that had split in half some unknown time ago. Both in Williams pinball machine sound boards. Replaced with MLCC but haven't tried thumping them :-)
Nice video! I just had to see it through.. and now Im late for work.. Damn it! Keep 'em coming, Cheers!
Nice video even when I did not understand all the things!
we have this model in our local maker space have repared two tines with out some dokumention, first time some r27 has getting larger in the power supply, found the tip in some forum
Great video Dave - thanks. However, would like to see the trace repairs and work on that.
Fantastic vid! :D Maybe try de-capping the cracked hybrid if it's all the same at this point? Might be interesting. Thanks!
Thanks for the video. Just one thing missing, would have loved to see the repair and how your repaired the board.
Have a day
Good job Dave.
Nice video Dave, seems like these mechanical faults are more common with old equipment.
Nice to see you killed the EEVBlog curse Dave... nice find and nice result, loved the video thanks
Would have loved to see how you "fixed" the broken lines and strengthen the board. Had similar issue with mine, removed green coating and joined the line with a thin wire but always feel it would break again overtime without putting a real reinforcement on the board... Anyways, awesome content as usual, keep it coming!
Now that was fun!
@19:30 "The transistor is up side down, all electrons are falling down" 😂😂😂😂
Good video, Dave - Better than the disaster of the Dumpster-Dive TV repair..... lol! Thank you :-)
that was awesome. I have an HP 54201D that has a faulty input and now I want to take it apart. I didn't know they had 68000 chips in them!
Ahhhh repair heaven..love it.
Still amazing!
Aaahh the mk1 eyeball, a great test piece of test equipment.
Did Dave really admit to doing something rather surprising with resistors ;-)
Nice video
Nice Job!