HTML-код
- Опубликовано: 26 апр 2017
- Remember to subscribe !
This shows my teardown of the power supply of my 2432A and the testing and replacement of some of the capacitors.
I was suspicious that the PSU had poor ripple as a have had a couple of tantalum caps fail, which don't like ripple, this was done as a precaution really, the only behaviour I had noticed was that MAYBE the noise floor was higher than it used to be (but I wasn't certain).
Give this a Thumbs Up if you like it, it helps to grow the channel, also please share the video with your friends to help the channel to grow !
To donate money to help fund items for the channel please use one of the methods below, cheers !
PayPal Donations: www.paypal.com/cgi-bin/webscr...
Patreon: / thedefpom #ifixstuff #thedefpom #electronicsrepair
TheDefpom Merchandise: teespring.com/stores/thedefpom
==========================================
Some Of My Electronics Tools (video and purchase links)
==========================================
Boonton
------
4220.
8210: defs.link/?u=e1eddc
Fluke
------
8842A:
45: defs.link/?u=eac51d
343A: defs.link/?u=13c93d
5200A: defs.link/?u=a43c99
540B: defs.link/?u=0c6bd9
893A.
A90.
HP/Agilent/Keysight
------
4261A: defs.link/?u=07ed95
5005A.
5342A 18GHz: defs.link/?u=5f7513
6181B: defs.link/?u=b12aef
8012B: defs.link/?u=ca5764
8648B: defs.link/?u=da52a3
8901B: defs.link/?u=535835
DSOX1102G: defs.link/?u=a68d39 defs.link/?u=12d498
E3646A: defs.link/?u=128f4a
Marconi
------
2022D.
2955.
TF2103: defs.link/?u=61baaa
Rohde & Schwarz
------
SMY: defs.link/?u=93514b
CMU200: defs.link/?u=8ccd72
Polarad SPN: defs.link/?u=2ead82
Siglent
------
SDM3065X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDS2102 (hacked to 340MHz): defs.link/?u=1ed0fe defs.link/?u=12d498
SPL-1008.
SDP1168X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDL1020X-E: defs.link/?u=a0eccb
Other Equipment
------
KSGER T12 Soldering Iron: defs.link/?u=620ace defs.link/?u=5c112e
Quick 861DW: defs.link/?u=138c0f defs.link/?u=a3fc81
S-993A: defs.link/?u=079677 defs.link/?u=e855a0
EEVBlog BM235: defs.link/?u=12d498
YR1030 Battery ESR: defs.link/?u=c56527
Heathkit IT-12 Signal Tracer.
Racal Dana 1992: defs.link/?u=8eeeba
Bird 43: defs.link/?u=4b18f7
Sinadder 3: defs.link/?u=2bf1dd
Audio Control SA-3050A RTA: defs.link/?u=a04df2
Korad KA3305D: defs.link/?u=69090a
PDVS2mini: defs.link/?u=869ba4
Valhalla 2703: defs.link/?u=06bcfc
Feeltech FY6800: defs.link/?u=8b98cd defs.link/?u=34d101
Eakins Microscope: defs.link/?u=b0278b defs.link/?u=262327
Mustool G600: defs.link/?u=b8bc26 defs.link/?u=33f0aa
Handheld Equipment
------
Uni-T UT210E: defs.link/?u=391ce3 defs.link/?u=ea4edc
DER DE-5000: defs.link/?u=0d9160 defs.link/?u=12d498
MK-328: defs.link/?u=0d9160 defs.link/?u=739ee7
MESR-100: defs.link/?u=0d9160 defs.link/?u=009419
ESR Meter: defs.link/?u=0d9160
HOPI: defs.link/?u=7fab55
PeakMeter PM6252: defs.link/?u=59ef66
HS1010: defs.link/?u=10c699
Thermal Camera: defs.link/?u=280cca defs.link/?u=4a2256 
Наука
![Sean Rii, Karyon, Sharzkii - Taungule [My Love] (Official Music Video)](http://i.ytimg.com/vi/eJoMuypbSzQ/mqdefault.jpg)
Thanks for posting this video. Picked up a 2432 for almost nothing, but looks like it has been dropped a few times before being stored in grandma's garden shed. I'm in the process of evicting all the black and brown widow spiders from all the nook and crannies. Need to track down a decent schematic before replacing the two .068uF safety capacitors that look like ancient amber fossils.
24:52 that's a Rifa EMI suppressor cap it's most definitely bad they are a replace on sight item in vintage equipment. Luckily they can easily be identified by their yellow transparent case.
They develop hairline cracks in the epoxy case moisture gets in and the plates eventually short out. Producing a big stench and alot of smoke. I've seen new old stock ones in the manufacturer packaging that were never installed and they had the same hairline cracks in them so it has nothing to do with use.
Your 2432 is nearly identical in many respects to my 2440, including having blown the same tantalum caps that yours had. These are fine scopes for everyday troubleshooting and bench work, and can be acquired for next to nothing, well, next to $150 (with shipping) as I found on eBay. Ditto on Bushougoma's note about the Rifa suppressor caps. Replace 'em. Thanks for the video.
Thanks for taking the time to make this great video of recapping.
I have a 2430a which looks very similar in regards to the component and board layout.
I heard Dave Jones say the Rifa capacitors on the power supply are very dodgy. I have a feeling that the ones I have are bad.
You've given me the confidence to try and replace them.....
By the way the ripple you are getting on your channels look identical to the one I have.
Thank you 😁
same here, they look identical to the 2430a this video was a Godsend
My 2432 was broken C706 0.068uF X-capacitor made by RIFA.
The capacitor shortage was caused R713 68-ohm burn-out !
Many smokes and bad smells produced !
Also, C806 0.068uF X-capacitor Package was cracked.
These X-Capacitors maybe solvent cracked.
i thank you friend such a huge help!!!! i got 2430a like the other fellow and all my caps are high. i have a very fuzzy screen, hope this will fix it
If it was only one noisy channel I would had tried recalibration, and possible DAC gain offset adjustment. BTW these are very nice scopes; they use a CCD-based serial memory architecture to achieve very high acquisition rates.
The recap was more to do with the fact I have had 2 tantalum caps fail in the past couple of years, the first time one failed I had checked the ripple and it was more than I thought it should be, but could be bothered trying to get the PSU out, I thought it was about time I took a look, out of all the caps I pulled only a couple of them were off value by a suspicious amount. I am not certain that the channels are all that noisy, I use my Siglent scope more than the tektronix, I only really use the tektronix when I need to do frequency measurements, as I use its CH2 output to feed my frequency counter.
@@TheDefpom hi. I have a litle of oscilations/pikes in both channels (and change little the offset suddently). The voltages in the PSU are fine (i changed all electrolitics caps). What about tahtalum? wich you changed? Thnaks
Did you fix the noise finally?
I realize this has been quite a few years but I was wondering if the scope still gets regular use and if so, did the recap solve the tantalum explosion problem? In other words, have any more tantalum’s caught fire since you recapped? I noted that the two incidents you had occurred within a very short time frame. I also saw another set of vid egg is on YT where another gent had what appeared to be the very same caps blow as you did in your first incident.
The unit is in storage now, but still working fine when I put it there.
Looks identical to mine inside. The noise your getting at fast time base speeds is similar to my working one.
Simon Spiers - likely the noise floor is normal then.
Yes it looks the same noise as on mine. Don't suppose you know the part numbers of your CCD's on the analog board are? They should be U350 and 450 and have the fins in a straight line.
Simon Spiers - I will have a look and let you know, may not be for a day or so though.
Cheers mate.! Congrats on 502 subscribers by the way!
I would like to say a big thanks.
I was able to changeout the X2 capacitors in my Tektronix 2430a oscilloscope. They were a horrible mess!
It seems they are identical in acess and location to your repair video.
I did happen to notice on my board 2 smaller Y2 capacitors tucked away between the big heatsink and a small transformer to the opposite side of the board.
I haven't changed them out. They look like RIFA capacitors .
Would it be wise to switch them out now or let them fail and then remove them?
A very thorough video.😁
Thanks....
eebaker69 - those old RIFA caps should always be swapped out, they did well considering the age, but they don’t last forever.
@@TheDefpom
Thanks for the advice.
I will definitely remove the old Y2 RIFA capacitors.
😁
@bri chomsky You will find troubleshooting info for the various errors starting in section 6 page 27 of the service manual, but having so many failures is probably a sign of a main supply failure.
If you change out caps, shouldn't you re-calibrate everything? Especially if you substitute different values?
+John Jones - probably not required for the supply, but if done to the main boards then recalibration would be a good idea.
It looks like to me that recap has no meaning at all. One must have electronic knowledge to repair it.
Ken Chau - this is an electronics repair, so some kind of electronics experience or knowledge is kind of expected. I wouldn’t be expecting people that don’t do electronics to repair (or even own) a scope.