I've got an Onkyo TX-NR808 that hung up during a firmware update and now when I plug it in I get MMPU Setting on the display and absolutely no ability to do anything. Is there some way I can reload the firmware and recover from this?
Unfortunately when I plug the unit into the outlet it goes directly to MMPU Settings and the normal approach (as you've described) to get to the firmware mode doesn't work. I was hoping someone might have an alternative.
It is possible to load firmware via interfaces on the HDMI board but I have never done this myself. The 1st DSP chip in my TX-NR808 died so I had no network, USB or audio.
I tried loading a firmware dump for the DSP part from another receiver as the DSP flash memory was also corrupted but it didn't fix the problem. The DSP processor is now obsolete, so my receiver was rendered scrap.
Yours sounds like the main microprocessor firmware that failed to load. Others on here have fixed this problem but I think it requires a special programmer that is no longer available to buy.
Maybe someone else will be able to offer some help but this forum can be a bit slow going. Most problems with Onkyo receivers have been covered on here so you may find useful info under other models with the same or similar fault.
I think this covers the process on a similar model:
It just occured to me that I may be able to help fix this in a different way. It depends if the problem is with the video processor, Q8200 or with the main micro Q8701.
I've removed the flash memory Q8206 and eeprom Q8201 from my old TX-NR808 HDMI board. These have the firmware for the video processor and mine was ok. I've read the contents and saved these as files that can be programmed into new blank or old erased chips.
If it's the main micro, the firmware is stored internally and you may or may not be able to sucessfully flash this with an external programmer. I've also removed this working chip, Q8701, from my old HDMI board. It could be used to replace yours but it is a 100 pin fine pitch QFP device though, so it depends what your soldering skills are like.
EDIT: It appears I've misread the service manual in my haste to assist...
Q8200 is the VSP (Video Signal Processor) Q8701 is the VMPU (Video Micro Processor). Q7020 is the MMPU, (Main Micro Processor) and is on a separate PCB, BCCP-0463. This is the small board at the end of the main ones that they all plug into. I still have this board and it should be fully working if you don't manage to get yours going.
Last Edit: Apr 1, 2021 12:40:43 GMT -5 by andyb1712
Spent some time reading, in particular your referenced post on flashing the MMPU and I have ordered the supplies necessary. Once I get everything delivered and set up I'll update on whether this works for me or not.
I would be wary of operating the receiver with the rear panel completely removed. Most boards have earth points that use the rear panel fixing screws. These should be fairly obvious with the panel off and I would put it back with at least these screws in place to be on the safe side before applying power.
docsss: Hi, HELP ! I really need firmware DSP2 Q3401 for ONKYO TX-NR3007 . [email protected]
Aug 29, 2021 11:47:32 GMT -5
timorenga: Gracias por aceptarme como miembro del foro, Estoy buscando manual de servicio para Denon AVR4310CI si alguien lo tiene se agradecería mucho que lo comparta Gracias
Jul 17, 2021 20:07:03 GMT -5