EEVblog No Script, No Fear, All Opinion

A big dumpster diving find! What did Dave score this time? Podcast: Download

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/ Podcast: Download

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 …

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 …

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/ Podcast: Download

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/ Podcast: Download

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 …

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 Podcast: Download

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 …

Repair of a Keithley 2302 battery simulator with junk bin parts. But it did put up a fight! Teardown video: https://www.youtube.com/watch?v=5LK8wduZsy0 Forum: https://www.eevblog.com/forum/blog/eevblog-1664-repair-with-junk-bin-parts!-keithley-2302/ 00:00 – Faulty VFD display in a Keithley 2302 Battery Simulator 01:22 – Teardown 03:14 – The Display driver PCB 04:30 – Solder Sucking Sucks 05:26 – …

Repairing a customers Brymen BM786 multimeter, and investigating the cause of the InEr error message on the input jack alert feature. Plus a giveaway to a local youngster. 00:00 – A returned BM786 Multimeter with InEr error message 03:23 – Split jacks and input alert circuit 05:19 – In-Circuit probing …

This was going to be a repair of a vintage Tandy 200 Portable Computer… Forum: https://www.eevblog.com/forum/blog/eevblog-1662-vintage-tandy-200-portable-computer-claytons-repairteardown/ 00:00 – I sear this Tandy 200 had a problem… 02:54 – Teardown 03:57 – The new BM2257 Multimeter 05:25 – I think it’s the buzzer 08:06 – Microscope teardown 16:20 – They don’t …

The difference between Time Domain and Frequency Domain in AC circuit analysis. AC Theory Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- Forum: https://www.eevblog.com/forum/blog/eevblog-1661-ac-basics-tutorial-part-5-time-domain-vs-frequency-domain/ Podcast: Download

Part 4 in the AC basics tutorial series. AC applied to resistors, capacitors and inductors, along with Capacitive Reactance and Inductive reactance. AC Theory Playlist Podcast: Download

Review of the new Quick 861 Pro hot air station compared to the original 861DW. Forum: https://www.eevblog.com/forum/blog/eevblog-1659-quick-861-pro-hot-air-station-review/ Podcast: Download