How to test a 7805 regulator in a ZX Spectrum with a cheap multimeter – MFS Quicktip! Mark Fixes Stuff | July 8, 2013 | Quick Tip, Repair, Sinclair Spectrum, Tutorial | 2 Comments A new format for me in this *very* short video on how to test a 7805 regulator in a ZX Spectrum 48k. Although the regulator is different in many other types of machines it’s the same process to check! Tags:48k, Flashing Blocks ZX Spectrum, Repair my ZX Spectrum, Sinclair Spectrum, Sinclair Spectrum Repair, Sinclair ZX Spectrum, Test a 7805 regulator, ZX Spectrum Repair Related Posts Review: PicoDivSD by Zaxon a small SD card Storage for the ZX Spectrum – PicoDivSD Rev 2.0 No Comments | May 22, 2015 Repair an LCD TV that won’t turn on and just clicks! Samsung, Sony, LG, Alba, Hisense, Bush most brands. No Comments | Nov 7, 2014 Review – DivMMC Future – A new SD Card device for Sinclair Spectrum from The Future Was 8 Bit! 7 Comments | Feb 16, 2017 Looking at the Scrapheap Spectrum 128k +3 – What’s Rattling & Power on FAIL??? No Comments | Nov 29, 2014 About The Author Mark Fixes Stuff Just a geek, geeking about. Not a nerd. 2 Comments jamie January 9, 2016 Reply Hey Mark. Firstly. Thanks for your videos. They really are a good watch and have learned from you. Secondly. I have bought a multimeter to test some sinclairs. I have a dead +2. How would i go by testing the mains? Is it the same process as on your 48k video? Mark Fixes Stuff January 30, 2016 Reply Hi Jamie. I would recommend not going near the mains supply. If everything else in the house is working the mains will be OK. If it’s a plus two with a barrel plug connector, you can test the tip of the barrel plug for 9v (centre negative) and if it’s a black one with the DIN type connector, look at my +2 power supply video so you can check the fuses. There are also some 78xx series regulators inside the +2/+3 models which you can test with the same process as shown in this video. Add a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment:*Name:* Email Address:* Website: Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.