EEVblog #1322 - JBL LSR308 Studio Monitor Speaker REPAIR
Repairing a JBL LSR308 studio monitor speaker. Digital troubleshooting in a speaker? Yep, that's a thing! How to systematically track down a fault and *know* that part has failed.
Dave looks at the current measurement front end of a typical multimeter and figures out how to redesign it for lower burden voltage.
It's not quite as easy as you might think, there are compromises and traps for young players.
And something you probably didn't know about HRC fuses.
PART 2 is HERE:
https://www.youtube.com/watch?v=xSEYPP5Xsi0
µCurrent article: http://www.eevblog.com/files/uCurrentArticle.pdf
Multimeter fuse and diode protection video:
https://www.youtube.com/watch?v=ne_Prn0eGQE
Multimeter input protection tutorial:
https://www.youtube.com/watch?v=zUhnGp5vh60
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https://www.youtube.com/watch?v=jx0dryLmUEQ
Dave replaces a cracked 5th gen iPad touch screen. Content rock bottom? But child happy, and one less new iPad that needs to be manufactured.
Forum: https://www.eevblog.com/forum/blog/eevblog-1255-apple-ipad-5th-gen-screen-repair/
#Apple #iPad #Repair
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WTF are these random mash content spam space/science/tech Youtube channels? Are they auto-generated bots?
These channels get over 1M views a day!
https://www.youtube.com/channel/UC2jAc3ifBNVT03iLjXSRPwQ
Forum: https://www.eevblog.com/forum/blog/eevblab-99-spam-youtube-spacesciencetech-channels-wtf/
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#Youtube #SPAM #content
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What's inside the world's first portable microcomputer?
The Osborne 1 from Osborne Computer Corporation torn down.
An Adam Osborne and Lee Felsenstein design.
ROM Dumps:
http://www.eevblog.com/files/Osborne1-ROM-RevE-1-44.BIN
http://www.eevblog.com/files/Osborne1-CharROM-RevA-7A3007-00.BIN
Field Service Manual:
http://maben.homeip.net/static/S100/osborne/systems/1983%20Osborne%20Field%20Service%20Manual.pdf
Technical Manual: http://history-computer.com/Library/Osborne1TechnicalManual.pdf
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https://www.youtube.com/watch?v=SJZ3zetpNOI
Fixing another two Gen 2 KRK Rokit 6 near field monitor speakers with the black gunk of death and failed capacitors.
How wide spread is this problem?
https://kit.com/EEVblog/youtube-video-blogging-gear
LOL at KRK Systems: https://imgur.com/O6lIen1
Forum: http://www.eevblog.com/forum/blog/eevblog-1073-more-krk-rokit-black-gunk-speaker-repair/
EEVblog Main Web Site: http://www.eevblog.com
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A Chinese startup has developed a tiny 50 year life diamond nuclear battery that's going to change the world! Yeah, nah.
Beijing Betavolt New Energy Technology Co., Ltd.
https://www.betavolt.tech
https://www.betavolt.tech/359485-359485_645066.html
https://www.betavolt.tech/cp_531390.html
https://newatlas.com/energy/betavolt-diamond-nuclear-battery/
https://www.neimagazine.com/news/newschinas-betavolt-develops-50-year-nuclear-battery-11439320
https://world-nuclear-news.org/Articles/Nuclear-battery-Chinese-firm-aiming-for-mass-mark
https://www.chinadaily.com.cn/a/202401/16/WS65a68ff7a3105f21a507c9b7.html
https://www.greencarcongress.com/2024/01/20240114-betavolt.html
https://www.batterypowertips.com/betavolt-achieves-miniaturization-of-atomic-batteries-with-50-year-autonomy/
https://www.eurasiantimes.com/chinas-nuclear-battery-can-power-mobile-phones/
https://www.thediplomaticaffairs.com/2024/01/13/the-dawn-of-nuclear-batteries-and-the-potential-reshaping-of-the-global-economy/
https://www.bristol.ac.uk/media-library/sites/cabot-institute-2018/documents/Diamond_battery_FAQs_Nov_2016.pdf
https://www.bristol.ac.uk/media-library/sites/cabot-institute-2018/documents/Diamond_battery_FAQs_Nov_2016.pdf
https://en.wikipedia.org/wiki/Diamond_battery
Nuclear Diamond Battery Debunked: https://www.youtube.com/watch?v=uzV_uzSTCTM
Nuclear Diamond Battery FRAUD!: https://www.youtube.com/watch?v=5M5MF6KE-jY
Mailbag with Nuclear Tritium battery: https://www.youtube.com/watch?v=yNQCaSNIrEM
Casio calculator test: https://www.youtube.com/watch?v=qo0mizb3CE8
Forum: https://www.eevblog.com/forum/blog/eevblog-1595-50-year-chinese-nuclear-diamond-battery!/
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#ElectronicsCreators #Nuclear #Battery
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https://www.youtube.com/watch?v=nEmO8DcOap4
Mailbag time.
Dave tears down an original Apple Newton Messagepad 100.
Photos: http://www.flickr.com/photos/eevblog/sets/72157632652385309/
Forum Topic: http://www.eevblog.com/forum/blog/eevblog-418-mailbag-apple-newton-teardown/
Service Manual: http://www.unna.org/unna/development/documentation/OMPService/OMPRepairManual.pdf
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