How to test TL431 / KIA431 Learn Electronics Repair #078

Learn Electronics Repair #078 How to test Programmable Zener Diode TL431. These little IC look just like a transistor and you find them in almost all Switch Mode Power Supplies. So we need to be able to identify and test these devices in order to be able to diagnose and repair these power supplies This is how to do it.... I work in collaboration with: The Electronics Channel (live streams with Carlos and Detlef)    / @theelectronicschannel   Gran Canaria Uncovered    / @grancanariauncovered   (with Detlef and Julie. Not electronics related) Det Builds Stuff -    / @detbuildsstuff   (Detlef) Retro Upgrade -    / @retroupgrade   (Carlos) 👉Click on the link https://s.click.aliexpress.com/e/_EvY... or enter the search code [AYGNN4] on the AliExpress homepage and don't forget to enjoy extra savings with the exclusive discount codes below. 🌟 Remember, these codes can be used on almost all items in selected countries on AliExpress. $3 off on orders over $29:【IFP9R2LA】 $6 off on orders over $59:【IFPCRNHA】 $9 off on orders over $89:【IFPKOS53】 $16 off on orders over $149:【IFPKB8ST】 $23 off on orders over $199:【IFPGX1QP】 $30 off on orders over $269:【IFPF08I5】 $40 off on orders over $369:【IFPE3N2J】 $50 off on orders over $469:【IFPJXACE】 $60 off on orders over $599:【IFPT9KEP】 $70 off on orders over $699:【IFPHKAMQ】 Valid until 1st July 2026 For All Your PCB needs: free $5 discount coupon https://www.pcbway.com/setinvite.aspx... Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission. DM40C https://s.click.aliexpress.com/e/_c4q... Aneng AN870 (Same as Zoyi ZT219) https://s.click.aliexpress.com/e/_c2w... Zoyi ZT-DQ02 https://s.click.aliexpress.com/e/_oB2... WinAPEX 268B Clamp Meter https://s.click.aliexpress.com/e/_opJ... VC480C+ MILLIOHM METER https://s.click.aliexpress.com/e/_onE... MESR-100 ESR METER https://s.click.aliexpress.com/e/_oom... XC6013L CAPACITOR METER https://s.click.aliexpress.com/e/_omn... FNB58 USB ANALYZER https://s.click.aliexpress.com/e/_c3h... 4KV Breakdown Tester https://s.click.aliexpress.com/e/_omK... LED Backlight Tester https://s.click.aliexpress.com/e/_oCR... NI-210SC Curve Tracer https://s.click.aliexpress.com/e/_o2e... NI210SJ (cheaper option but watch my review) https://s.click.aliexpress.com/e/_oD6... PCI POST ANALYZER https://s.click.aliexpress.com/e/_c44... FNIRSI 1014D SCOPE https://s.click.aliexpress.com/e/_c2x... NPS3010W 30V 10A PSU https://s.click.aliexpress.com/e/_oDu... Nice-Power Dual 120V 3A PSU https://s.click.aliexpress.com/e/_okG... HR1520 Pro Short Killer https://s.click.aliexpress.com/e/_c2R... KSGER T12 Soldering Station https://s.click.aliexpress.com/e/_omq... AIFEN-A9 PRO Soldering Station C115/C210/C245/C470 https://s.click.aliexpress.com/e/_ong... C470 Soldering Iron & Tips https://s.click.aliexpress.com/e/_opm... https://s.click.aliexpress.com/e/_oDV... QUICK 861DW https://s.click.aliexpress.com/e/_ooW... PROS'KIT SS-331H https://s.click.aliexpress.com/e/_omx... Sequre HT140 Hot Tweezers https://s.click.aliexpress.com/e/_opH... KADA 853B Preheater https://s.click.aliexpress.com/e/_opP... FNIRSI SWM-10 Spot Welder https://s.click.aliexpress.com/e/_ooZ... INFIRAY P2 PRO IR CAMERA + MACRO LENS https://s.click.aliexpress.com/e/_oot... TOOLTOP ET13S THERMAL CAMERA METER https://s.click.aliexpress.com/e/_c4M... ET13S MACRO LENS https://s.click.aliexpress.com/e/_ol9... Trinocular Microscope https://s.click.aliexpress.com/e/_okJ... TOMLOV TM4K AF FLEX https://s.click.aliexpress.com/e/_oBi... TL866 II+ PROGRAMMER https://s.click.aliexpress.com/e/_c32... NC-559-ASM FLUX https://s.click.aliexpress.com/e/_onM... DESOLDER BRAID (I use size 8045) https://s.click.aliexpress.com/e/_onh... HX-T100 SOLDER https://s.click.aliexpress.com/e/_o2D... ESD-11 TWEEZERS https://s.click.aliexpress.com/e/_om2... Learn Electronics Repair Discord   / discord   If you would like to support this channel You can send donations https://www.paypal.com/paypalme/youtu... You can subscribe to Patreon   / learnelectronicsrepair   Or you can click JOIN to become a channel member Thank you Richard