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Part 2 of the BM786 troubleshooting repair, proving it's the processor at fault.
And Dave goofed up BIG TIME, did you spot the ERROR in the previous video?
Forum: https://www.eevblog.com/forum/blog/eevblog-1520-troubleshooting-a-faulty-bm786-multimeter/
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#ElectronicsCreators #Repair #Multimeter

By YTB

25 thoughts on “Eevblog 1522 – bm786 multimeter repair part 2”
  1. Avataaar/Circle Created with python_avatars Glenn Hamblin says:

    Is it possibly telling you that no probe is plugged in?

  2. Avataaar/Circle Created with python_avatars hitherewhy says:

    love to the other ausies

  3. Avataaar/Circle Created with python_avatars hitherewhy says:

    no thats the sign off an ace stay cool

  4. Avataaar/Circle Created with python_avatars hitherewhy says:

    shame on you 4 seing that

  5. Avataaar/Circle Created with python_avatars hitherewhy says:

    looked like one though , cool

  6. Avataaar/Circle Created with python_avatars hitherewhy says:

    wait hpne 4 a beeer be back loojs cooool

  7. Avataaar/Circle Created with python_avatars Blondie SL says:

    As for the InErr, is it possible that since the processor from the donor board had a different resistor, that perhaps that resistor needs to follow the processor to the fix board?
    If mem serves, the fix board had an upside down 0 ohm resistor while the donor board had something like a 1K ???

    Perhaps the mod was for a slightly diff. proc chip!???

  8. Avataaar/Circle Created with python_avatars groove jet says:

    Hi ,
    Sorry , I was looking out for you !! I thought you’d be following Virgin Orbit flight? Ohh well.
    Sorry I didn’t know where to post, so I snook in here😳😁👍

  9. Avataaar/Circle Created with python_avatars Alberto Ignacio López Sandoval, (℧)Ω. says:

    Exelent video series, tks 🎩 Mrs. Jones,.

  10. Avataaar/Circle Created with python_avatars P A says:

    part 2! yay

  11. Avataaar/Circle Created with python_avatars Bernd Rösgen says:

    Great work.

  12. Avataaar/Circle Created with python_avatars Quick Brown Fox says:

    Why did you sssume that "InEr" = Insertion? It is Initialisation, obviously. As far as I cam see, you soldered the chip poorly, some pins are probably loose.

  13. Avataaar/Circle Created with python_avatars q zorn says:

    very nice repair video 🥳 I just purchased a cheapy $57 HoldPeak_HP-770D CAT III Auto Range 40000 Counts DMM BarGraph MultiMeter, seems to work OK on hobby stuff?
    Now for the important news. April 20 2023, 11.27am local time, Total Solar Eclipse over Western Australia’s Coral Coast. Are there any venomous snakes out where the tourist will be?

  14. Avataaar/Circle Created with python_avatars Ronald Youvan says:

    Perhaps someone jabbed a 2.2K where a zero Ω belongs? Ron W4BIN

  15. Avataaar/Circle Created with python_avatars Ricardo Peironcely says:

    When you make electronics videos you're great!

  16. Avataaar/Circle Created with python_avatars Fun Cool says:

    Теперь все знают , что чип это Stm32.

  17. Avataaar/Circle Created with python_avatars Trevor O. says:

    A whole lot of useless components. It's time to make something with a normal color TFT LCD with a built-in electronics and a lot of measuring modes. In the same space, it is possible to integrate a signal generator and signal logger with 10x precision with internal calibration tables – there is no problem with built-in memory for that nowadays and normal MODERN multimeter functions, not defined by marketing, such as L measurements with low current milliohm meter. Like what is the problem ? It is solvable by modern integrated circuits.

  18. Avataaar/Circle Created with python_avatars BʟɪᴛᴛᴇʀBᴜɢ says:

    Honest to god, Dave, I was convinced the other QFP was the processor roughly half-way through the last video, simply by the huge number of traces going to it. I never commented on it as I'm not an electronics engineer and didn't want to make a fool of myself, to be brutally honest with you.

  19. Avataaar/Circle Created with python_avatars EL 84XX says:

    Diodeb D7 is broken🙃

  20. Avataaar/Circle Created with python_avatars atexnik says:

    Brymen should release firmware updates to public!

  21. Avataaar/Circle Created with python_avatars Stephen Barlin says:

    I have never seen you fix anything. You need a better more logical fault finding approach perhaps.

  22. Avataaar/Circle Created with python_avatars Jimmy Zhao says:

    Good work.

  23. Avataaar/Circle Created with python_avatars shieldcracker says:

    Could the Insertion error be a false alarm related incorrect DMM input jack connection?

  24. Avataaar/Circle Created with python_avatars Filk says:

    Take a video about this , The world is now ruled by one community of people, the world Satanic elite, you can also call them the committee to meet the Antichrist and prevent the 2nd coming of Jesus, Trump called them the deep state, at the moment it consists of about 10,000 people, the main ones there are Rockefellers, Rothschilds, Windsors, Baruchs, they, their ancestors, descendants and other people who enter there have the mark of Lucifer, which, if they bring the antichrist and do not allow the 2nd coming, they will receive eternal life after the x hour, and the rest of humanity, for all the time that they have lived, they won't get anything, They won't stop themselves

  25. Avataaar/Circle Created with python_avatars Mark O. says:

    1st of all, an multimeter it’s the main tool in EE lab. You should purchase a trusty piece of equipment and not “Made in 3rd world” POS. OK, your budged is very tight, then buy an 5 – 20 bucks DMM, save money and buy a trusty equipment designed/made in normal world.
    Otherwise you will spend more time in troubleshooting the multimeter than the real problem… Think twice and buy a quality product like Fluke, Keithley, Keysight, etc.
    Can you trust the EEVblog branded DMM? Even the creator(??? I doubt he even know the design…) / sponsor doesn’t have the schematics !!!

    Is Brymen better than KAIWEETS? …the same crap, only in different package, and the price is different 🙂

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