Restoring the Roland Jupiter 4 - Mainboard Recap, CMOS Chip Troubleshooting, and Thermal Imaging

Welcome to the final part of my Roland Jupiter 4 restoration project! In this video, I'll be recapping the mainboard and troubleshooting to find out which CMOS chip is faulty. Using an oscilloscope and thermal imaging, I'll diagnose the problem and identify the malfunctioning chip to ensure this classic synthesizer sounds perfect again.
In this detailed tutorial, you'll learn:
How to recap the mainboard of the Roland Jupiter 4
Step-by-step process for using an oscilloscope in chip troubleshooting
How to use thermal imaging to diagnose electronic components
Tips and techniques for identifying and replacing faulty CMOS chips
This video is ideal for both beginners and seasoned synth enthusiasts who want to gain deeper insights into synthesizer restoration. Join me as we complete the revival of the Roland Jupiter 4, and stay tuned for more exciting repair and restoration projects. Let's bring back the sound of this timeless instrument!
"Roland Jupiter 4, Synthesizer restoration, Vintage synthesizer repair, Synth cleaning, Electronic music gear, Analog synthesizer, Synth repair tutorial, Vintage gear restoration, Roland synthesizer, Retro music equipment, Synth maintenance, Music instrument repair, Electronic music production, Vintage electronic instruments, DIY synth repair, Synth troubleshooting, Classic synthesizers, Mainboard recapping, CMOS chip troubleshooting, Oscilloscope diagnostics, Electronic component testing, Synth repair guide, Roland Jupiter 4 restoration, Thermal imaging diagnostics, Thermal camera repair"

[@daz4627]

Really excellent work ... I've recapped many of my synths but I've stayed away from CMOS chips (ANY chips for that matter)... maybe I'll get brave and try and do a complete service one day ... great job 🙂

[@DigitalArtDeco]

Thanks!

[@autoy]

Great video. Mine is also a BA662 version. In these early units there’s an issue where the LFO will leak into the audio output when the filter mod amount is set high and LFO speed is audio rate. Have you noticed this in your unit? Cheers.