EEVblog

By David L. JonesTechnology Education

EEVblog episodes

March 31, 2025 EEVblog 1675 – Corporate Enforced WASTE! Ninja Blender REPAIR (Right To Repair)
Our Ninja blender blade failed. For a warranty replacement they wanted us to DESTROY and DISPOSE OF the old perfectly working base unit before sending a new one. Let’s see about that…
The first ever EEVBlog video with zero commentary, just memes.
My breakfast smoothie: https://www.youtube.com/shorts/-2mf1mqZVQ0
Forum: https://www.eevblog.com/forum/blog/eevblog-1675-ninja-blender-repair-because-why-(right-to-repair)/
Credits:
“Our Story Begins” Kevin MacLeod (incompetech.com)
“Cloud Dancer ” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/
5 min
March 10, 2025 EEVblog 1674 – Dumpster Diving HAUL!
A big dumpster diving find! What did Dave score this time?
12 min
March 10, 2025 EEVblog 1673 – JBL Partybox 310 Repair – Part 2 (SPOILER)
A quick follow-up to the JBL Partybox 310 speaker repair and speculation on WHY the fault happened the way it happened. Contains SPOLIERS, so watch Part 1 first!
Forum: https://www.eevblog.com/forum/blog/eevblog-1672-jbl-repair-youll-never-guess-the-fault/
10 min
March 04, 2025 EEVblog 1672 – JBL REPAIR: You’ll never guess the fault!
Repair of a JBL Partybox 310 speaker. Follow along as Dave goes down the repair rabbit hole. Try and guess the exact fault before Dave does, it’s a doozy!
00:00 – JBL Partybox 310 Speaker fault symptoms and initial failure speculation
02:57 – Teardown
06:23 – Is it a firmware lockup issue?
07:17 – Checking the power switch
09:13 – Main PCB’s
10:52 – Hello IT, have you tried turning it off and on again
11:46 – PCB microscope inspection
13:39 – Bench testing and, thou shalt test voltages
16:31 – Looking at the keypad PCB again
17:41 – Replicate the fault using an external PSU
22:55 – Schematic, we have Schematic!
24:14 – The power flow block diagram
28:44 – The penny drops
29:45 – Design TIP
32:04 – Without the schematic I’d be chasing a red herring down a rabbit hole
33:10 – Manual Bypass time to get it working!
34:50 – I called it at the start, but assumed incorrectly
36:33 – OK, let’s trace WHERE this fault actually is
37:41 – No, it’s can’t be, surely not…
39:52 – But WHAT caused it?
42:05 – The repair
44:20 – Assembly back together and testing
HP 1740A oscilloscope repair:
Part 1: https://www.youtube.com/watch?v=Cmz8bzUsj7E
Part 2: https://www.youtube.com/watch?v=7ocancoZ02Q
Forum: https://www.eevblog.com/forum/blog/eevblog-1672-jbl-repair-youll-never-guess-the-fault/
47 min
February 27, 2025 EEVblog 1670 – BM786 Multimeter BATTERY LEAKAGE REPAIR + GIVEAWAY
How can the same sh!t happen to the same guy twice? And a trap for young players with LCD’s.
And a giveaway for the young whippersnapper in Australia.
Forum: https://www.eevblog.com/forum/blog/eevblog-1670-bm786-multimeter-battery-leakage-repair-giveaway/
00:00 – How can the same sh!t happen to the same guy twice?
06:27 – Zebra strip elastomeric connector
09:40 – It STILL doesn’t work? Trap for young players with LCD’s
17:38 – I don’t hide my mistakes
18:30 – GIVEAWAY
20 min
February 19, 2025 EEVblog 1669 – Agilent U53131A VFD to LED Display Upgrade MAILBAG
A mailbag replacement custom LED display for the Agilent U53131A VFD display frequency counter.
www.hubequip.net
Forum: https://www.eevblog.com/forum/blog/eevblog-1669-agilent-u53131a-vfd-to-led-display-upgrade-mailbag/
15 min
February 15, 2025 EEVblog 1668 – HORRIFIC Alkaline Battery Leakage in Rare Prototype Multimeter
Horrific alkaline battery leakage in a rare prototype EEVblog 555 Multimeter.
Can it be repaired?
Forum: https://www.eevblog.com/forum/blog/eevblog-1668-horrific-alkaline-battery-leakage-in-rare-prototype-multimeter/
20 min
February 15, 2025 EEVblog 1667 – Reverse Engineering the Brymen BM2257 Multimeter LowZ Mode
Reverse Engineering the Brymen BM2257 Multimeter front end to understand what changes have been made from the BM235 in the Low Z mode. DaveCAD time. Also some testing of the LowZ mode and how it works.
Forum: https://www.eevblog.com/forum/blog/eevblog-1667-reverse-engineering-the-brymen-bm2257-multimeter/
MOV datasheet: https://www.cnr.com.tw/cloudSpace/CNR_D.pdf
How to reverse engineer: https://www.youtube.com/watch?v=lJVrTV_BeGg
Multimeter Input Protection: https://www.youtube.com/watch?v=zUhnGp5vh60
22 min
February 06, 2025 EEVblog 1666 – Blown SMD Component Identification
Let’s find out what this blown SMD part is, sent in by a viewer.
Forum: https://www.eevblog.com/forum/blog/eevblog-1666-blown-smd-component-identification/
Component Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHtdQF-m5UFZ5GEjABadI3kI
16 min
February 06, 2025 EEVblog 1665 – Keithley VFD REPAIR 2 – Electric Boogaloo
Part 2 of the Keithley 2302 battery simulator repair of the VFD display.
Just a follow-up on testing the actual VFD display itself to see if there is any fault that’s not the VFD vacuum.
00:00 – Having another look at the failed Newhaven VFD dispaly module
05:37 – Measurign voltages
07:32 – Oscilloscope probing
08:33 – HELLO capacitor! But not the one I expected.
12:25 – To the SMD cap replacement kit
13:11 – Rail measurements again
14:38 – Big ripple improvement, but lets qild the lilly.
15:53 – Bugger! Ok, let’s try the belt’n’braces approach.
17:21 – Winner Winner Extra Chicken Dinner!
Forum: https://www.eevblog.com/forum/blog/eevblog-1664-repair-with-junk-bin-parts!-keithley-2302/
How VFD Displays Work: https://www.youtube.com/watch?v=gZIRPJt69sM
Hacking a VFD Display: https://www.youtube.com/watch?v=clUVEyi_YNM
18 min