REPAIR a Sony Stereo STR-DE915 Bad Caps and Cold Solder Joints Fix Electronics MESR V2 Meter
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- Опубліковано 20 вер 2017
- Easy REPAIR of the SONY STR-DE915 Stereo Receiver . After 18 years of use it developed some broken solder joints and capacitors went bad. I used the MESR V2 cap meter to test and diagnose the faulty components and the Hakko FX888D soldering iron to reflow solder on the cold connections how to fix broken dead
MESR 100 V2 capacitor meter: amzn.to/3L6EKDp
Hakko FX888D soldering iron: amzn.to/3l0WEwF
Solder: amzn.to/33BRPPK
These are the tools I used.
Thanks.
(paid link)
As an Amazon Associate I earn from qualifying purchases. - Наука та технологія
MESR 100 V2 capacitor meter: amzn.to/35CfEso
Hakko FX888D soldering iron: amzn.to/31k2mNN
Solder: amzn.to/33BRPPK
These are the tools I used.
Thanks.
(paid link)
As an Amazon Associate I earn from qualifying purchases.
The test leads that came with this esr meter is too short with alligator clip. Where did you buy the test leads that you are using in this video? I tried other test leads but the meter is not zeroing out when shorting. I read the reviews on amazon that the problem with this meter not zeroing out if using other test leads is the resistance.
@@generryan5545 hi..i have your same situation, have made a short hook probe about 20cm lenght ..have you find a solution ? KR Alex (it)
@@alessandrozax Nope. I returned the esr meter and just bought the blue esr meter. The test leads on this meter is just way too short for on board testing.
Interesting video, thanks. I have to point out, It's SOLDER, not SODDER!
Thank you for sharing your repair experience on amplifier. This Sony will live another five to ten years. Now I have some ideas how to find faults in circuit board after watching your video.
Thanks for the tips, Woody! You were great in Zombieland!
So many people might say to buy new caps, but I love that it works fine to salvage caps and test and re-use!
I also took caps from old blown up pc power supply for my hdtv pvr supply I attempted to repair because it was randomly freezing during startup. Of course it may be that old caps have shorter life and if bad luck I have to replace them again soon but I was just too lazy to buy new ones lol
Dude. I just wanted to say you are doing a phenomenal job because you’re explaining what was happening and why.
A lot of very nice, knowledgeable technicians do work like this for UA-cam and say:
“Let’s test this. [beep!] Oh hell yeah that one’s bad. We’ll get a new one and yadda, yadda…”
I’m a noob on electronics but not that dumb, and I understood exactly what you did and why.
Anyway, thanks.🙏. Easy SUB. 👍
Great tutorial. You can also test the resistance and microhenries of the inductors with the esr meter. The reactance formula is 2𝛑FL. That would be 2 x 3.14 x frequency of esr meter which is 100kHz x 100uH Just plug it in.
R=0.628 X L(uH)
L(uH)=R(ohms)/0.628
Just repaired a Sony str-de197, similar problem. Left or right channel and speakers A and B signal drops. Took out the main board and resoldered several solder points of the speaker relais and speaker terminals and the issue was fixed 😊
Thanks for these informative videos. Short and simple. I have learnt a lot.
where did you buy the multimeter probes for the MESR 100, standard ones dont seem to null out.
Always nice saving these dumpster electronics. Less waste and profit :)
Sony receivers are all prone to dry joints like this. Nice to see another one saved from the dumpster.
Great fix Mr AnimationBubble!
well done , very informative
Cool to see Woody Harrelson doing electronic repair!
But for real, thanks for the instructional vid! Well done!
I have one of these and the surround sound wont work. Somewhere in it's life, Both A and B were turned on while the surround sound was on. Any idea what blew or what to check?
There's a warning on the back that says not to turn on A+B with surround sound on.
How do you zero the meter with those long leads?
Super cool thank you so much.
Good job 👍👍
Nice vid!
So would a amp work with one or two bad caps?
great video,
Good shizzle my nizzle.
Will it work in small smd capacitors ?
Funbundle, what about if there is a capacitor in parallel or even multiple, would it not affect the reading?
Excellent!
Thank you chifu
Well done
What kind of solder do you use friend? I see it looks good, could you give me the name of the solder?
Good video
Note! Not all black stripes on a capacitor mean a negative side. Research the capacitor to be sure it's installed correctly.
Why does mine not have a bottom access panel
I have got a JVC (i think receiver) that just last weekend starting doing something similar. Volume is really low and if I turn it way up I hear cracking and some music but it cuts in and out. I was thinking the volume knob pot may be bad but I will check the caps too
try banging on it with your fist while its powered on. if it reacts with the vibration then theres a broken/cracked solder joint.
If that doesnt work, try de-oxidizing the volume pot and switches. Dirty pot contacts are a very common problem in older electronics.
@@FunBubble Thanks for the video , i have an old Sony receiver str k850 that won't memorize preset radio stations no more, i have to manually put in frequency in order to tune in station ,but if i try to set up another frequency it looses the first one and so on, this might be old caps, what you guys experts on radios think i should look for, thanks
Owned one now, do you think using a long wire will make the reading inaccurate ?
It depends on the device AND the quality of the wires and connections.
Bookmarked for future reference, My centre channel is on the way out - a tap will fix it, but suspect will get worse.
Can you please tell me the brand and lenght of your test leads? Long leads will not zero the meter.
hi, i used the probes from one of those free harbor freight cheapo multimeters. They seems to work fine and i havent had any problems using them with the mesr v2.
@@FunBubble I tried 2 test lead sets from my multimeters and with both it says error when I short leads and attempt to zero the meter. Apparently longer test leads have too much resistance
I have a sony str-de 525 receiver that looks similar to this
Note to Self must get Solder Wick...
Are you converting the reading on the meter to another unit of measurement, because for 100 microfarad cap it was reading 1.6 or something and you said it should be less than . 7?
He has an ESR meter that measures the AC resistance, not the capacitance. There are tables what the Elkos ESR should be for specific farrad and voltage values. This way you can measure the Elkos in circuit and don't have to solder each of them out of the board.
@@ulflulfl9464 Thank you sir.
How can I figure out what the caps are... And what they should read?
The caps will have their values printed on the side and you can look up the appropriate ESR in a table.
What brand of soldering iron are you using?
hakko fx888d
Why reuse caps instead of new that will have more lifespan?
hye sir how to check if capacitor rating not in the list? like 3300uf and etc..
i guesstimate by looking at the closest values.
@@FunBubble how sir, can u teach me..becoz i have a lot of farad not in the list
0.20ohms 3300uf
if only I knew that earlier
It would make more sense that once you pull a electrolytic from the board to test, just replace it. I always test them to see if they were really bad mainly out of curiousity, but the hard part is unsoldering, and the price of the caps is next to nothing.
How can this test caps if they are in parallel on the board?
Man.... I really really really really want to become proficient in circuitry...
A bunch of the board looked like it had old Flux or electrolytic fluid in places you never pointed out
I wish everything was as easy as capacitors, those voltage amplifier ic's in sony amps will burn your fingers when running they get so hot, its wise to fit a heatsink too them, once they short they will destroy the darlington transistors, sony in their infinite wisdom decided to not fit heatsinks to these ic's that run at 95c, and the capacitors you fitted are not fit for their purpose, in an audio signal path you need to fit nichicon fine gold if you want your amp to sound good.
Buen video pero deberías grabar otro con un equipo que sea estadounidense y no chino como el MESR100
It's not technically correct to say the caps are "off spec" since you're reading ESR.
It's just that the cap's physical innards went bad somehow and are causing higher than normal resistance in the circuit, preventing adequate voltage to flow through. The caps themselves didn't suddenly change their voltage or capacitance specs/values.😅 And just because they read within good ESR range doesn't always mean they're good caps. You should have explained what ESR means and how it doesn't have much to do with the capacitance but rather resistance since all components are inherently going to give some resistance to an electrical current. Bad caps can still give perfect ESR readings.
Every set of test probes I have won't work with this meter. I just don't get a correct reading. It's a disappointment to be honnest to have spent a lot of money on this meter and it only comes with crocodile clips.
I agree, but I clipped the ends of some extra leads I had with probed leads on both ends, not too long in length), to the alligator clips that allowed be to connect to the capacitors much easier than the alligator clips. I only used leads that were no more than 10” in length. If you use too long of leads you’ll get an error read.
It is “soLder” not “soder”!
@DrTeeth That depends entirely on your location. In my Merriam-Webster dictionary, the 'L' is silent. Good red-blooded 'mericuns say "soder."
Nice to know I wasn't the only one bothered by this.