How to test a 7805 regulator in a ZX Spectrum with a cheap multimeter – MFS Quicktip! Mark Fixes Stuff | 8 July 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 Another package opening! No Comments | Apr 24, 2013 Mystery 8 Bit Box Opening – A disc based system! No Comments | Feb 6, 2014 No new fixes as *I* am broken :( No Comments | Mar 6, 2013 Building the ZX Dandanator Mini 2.1 for the ZX Spectrum – Flash RAM ROM Interface No Comments | Jan 8, 2020 About The Author Mark Fixes Stuff Just a geek, geeking about. Not a nerd. 2 Comments jamie 9 January 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 30 January 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 Add a Comment Cancel replyYour email address will not be published.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.