Dear Friends
I would like to ask for your help.
I have recently purchased a faulty DX7II-D model, which is producing the problem you can hear in the YouTube video below.
https://youtu.be/ZdbKvThphDI
The battery is 2.9V, I upgraded the ROM to v.:1.9 firmware, I don't have a cartridge for it, so I loaded the INTERNAL memory contents via MIDI, but unfortunately no change. What is worrying is that the noise also comes in test mode (as shown in the video) instead of the 880 Hz test tone. The power supply voltages are fine. Do you think this is the kind of error that could be produced by a PCM54 DAC failure? I'm afraid not. It is reacting to the pitch bender, this seems more like a structural fault, which unfortunately could probably be a fault in the EGM or OPS chips. What is your opinion?
Thanks in advance!
Greetings from Hungary!
I would like to ask for your help.
I have recently purchased a faulty DX7II-D model, which is producing the problem you can hear in the YouTube video below.
https://youtu.be/ZdbKvThphDI
The battery is 2.9V, I upgraded the ROM to v.:1.9 firmware, I don't have a cartridge for it, so I loaded the INTERNAL memory contents via MIDI, but unfortunately no change. What is worrying is that the noise also comes in test mode (as shown in the video) instead of the 880 Hz test tone. The power supply voltages are fine. Do you think this is the kind of error that could be produced by a PCM54 DAC failure? I'm afraid not. It is reacting to the pitch bender, this seems more like a structural fault, which unfortunately could probably be a fault in the EGM or OPS chips. What is your opinion?
Thanks in advance!
Greetings from Hungary!
Statistics: Posted by mickeyratt — Sun May 26, 2024 7:06 pm