Roland XV-5080 DIY Power Supply & Restoration October 16, 2026October 16, 2026 by ddzheng Restoring a XV-5080 and making an open-source DIY power supply
Yamaha RX-5 Repair September 23, 2026September 23, 2026 by ddzheng Yamaha RX5 with no boot issue and screen only shows black blocks
Fluke/Philips Scopemeter Keypad Repair September 2, 2026 by ddzheng Repair of membrane keypad using silver epoxy
Yamaha DGX-620 E-piano Repair August 12, 2026August 12, 2026 by ddzheng I was given a Yamaha DGX-620 for free, which has a broken screen and bad loudspeaker. This is an easy repair, it just involves replacing the screen and the speaker.
Roland XPS-30 Potentiometer Repair December 17, 2025 by ddzheng A slowly decreasing output volume caused by bad pot.
Roland JV-90 Repair August 5, 2025 by ddzheng Customer states patch data corruption while in use which lead to weird sound all over the place.
Roland XP-80 LCD Replacement December 30, 2024August 5, 2025 by ddzheng Final modification for my XP-80, and you can do this as well. Should apply to JV-2080 and XV-5080 as well.
Korg Triton Repair and Restoration November 17, 2024October 6, 2025 by ddzheng A long time viewer of my Bilibili channel contacted me to do a restoration of his Korg Triton.
Tektronix DPO71254B Repair September 11, 2024March 12, 2026 by ddzheng There is a DPO71254B at my workplace that has been abandoned for quite a while. I repaired it so that we can use it to debug (no cal though)
Roland D-50 Repair December 31, 2023February 6, 2025 by ddzheng The long journey of restoring a Roland D-50