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. Full 55min video: Forum: 00:00 - Introduction 01:55 - Inside 04:42 - The chips 07:05 - Voltage checks 07:58 - Safety protection 08:18 - Oscilloscope time 10:29 - ADC checks 11:59 - Signal injection testing 13:08 - Power amp DSP debugging 15:35 - External load checks 19:21 - Suspect identified 20:05 - Rework Desoldering 24:28 - Component replacement soldering 27:01 - Winner Winner Chicken Dinner EEVblog Main Web Site: The 2nd EEVblog Channel: Support the EEVblog through Patreon! AliExpress Affiliate: Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! T-Shirts: Теги: eevblog,video,jbl,jbl lsr308,jbl lsr305,jbl speaker repair,repair,studio monitor,studio monitor speakers,studio monitor speaker repair,schematic,speaker repair,class d amplifier,how to repair