In this video we have a look around inside the mighty Roland JP-4 synthesizer and see how it works. Then we troubleshoot and repair this dead Jupiter 4.
00:39 – The Problem: No Output
01:28 – Tour Inside / Technical Overview
06:10 – Power Suppy Check
07:04 – CPU Check
11:56 – Key Assigner Board Check
13:30 – Main Motherboard Check
16:07 – DAC Troubleshooting
20:25 – Making The Repair
22:46 – Jupiter 4 Repaired!
