And thus Steve went ahead and replaced the EEPROM of my Accuphase with the EEPROM from the sacrificial DAC.
And viola, the USB input is working again, correctly detected by Snakeoil OS as a USB 2.0 async audio device, and capable of playing back PCM and DoP as before.
The hypothesis of a corrupted EEPROM chip is hence proven.
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8 comments
Comment from: Evgeny Visitor
Thanks you very much! I had the same issue with Accuphase DC-37 and your guide helped us to get the device back to work!
Comment from: Agent Kith Member
Happy to hear that. Was it a bad receiver or a corrupted EEPROM in your case?
Comment from: Clark Visitor
My device has the same problem. What model of EEPROM is replaced? Thank you.
Comment from: Agent Kith Member
Hi Clark,
You don’t replace the EEPROM per se, just need to reflash it with a working firmware and your DAC will be back working again.
Comment from: Eugene Visitor
Hi, Agent Kith. My name is Eugene and I think I have th same problem with DC-37 USB port. Windows cannot identify it, says "the USB device is not working proper" or something like this (please, exuse me for my english). Please, can you kindly help me - how can I reflash the usb port? I’m really stressed now, don’t know what to do…. Please help!
Thank you.
Comment from: Agent Kith Member
You need to reflash the EEPROM on your DAC. This is a electronic component inside the DAC and require a technician with specialist tools. Or you can replace the EEPROM with a working one meant for the Bravo chip.
You can check around your area and see if any audio technicians with the ability to do this. Send them this article for reference.
Comment from: Zinoviy Visitor
Hello, where can I get a firmware to reflash EEPROM with? Or get a working EEPROM chip?
Comment from: Clark Visitor
Successfully resolved! Thank you very much!