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
Repair SONY DSC-P93 September 9, 2023December 20, 2024 by ddzheng Repair a SONY DSC-P93 that has stuttering OVF zoom and an error message
Resurrecting AGM Lead Acid Battery August 15, 2023August 15, 2023 by ddzheng Although not regular flooded type, AGM batteries can also be restored by adding water if it's not too far gone.