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Post by dyoungers on Mar 30, 2021 13:35:50 GMT -5
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?
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Deleted
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Post by Deleted on Mar 31, 2021 7:23:56 GMT -5
I've scrapped my TX-NR808 now and I never saw a message like this on it...
You can however use the front panel buttons to put it in update firmware mode:
Switch the unit on. Press Display and On/Standby together, which will display the main firmware version.
Then press the Return button to access the firmware update menu. Use the arrow keys to select how you want to perform the update.
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Post by dyoungers on Mar 31, 2021 9:56:37 GMT -5
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.
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Post by Deleted on Mar 31, 2021 14:38:05 GMT -5
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:
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Post by dyoungers on Apr 1, 2021 8:10:20 GMT -5
Thanks for the link! I know someone that probably has the equipment to flash things so this might be an option.
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Post by Deleted on Apr 1, 2021 10:22:29 GMT -5
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.
Attachments:
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Post by dyoungers on Apr 1, 2021 13:21:26 GMT -5
I'll see what I can do with the info I have at this point and get back to you. Thanks!
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Deleted
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Post by Deleted on Apr 1, 2021 13:57:42 GMT -5
No problem...
P7001A is the connector on the CPU board you'll need to use to flash the main microprocessor firmware.
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Post by dyoungers on Apr 6, 2021 14:29:15 GMT -5
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.
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Post by Deleted on Apr 6, 2021 16:23:30 GMT -5
That will be the best option if you can do it as you won't have to take much apart. It depends what caused the firmware update to fail but should be repairable this way.
Replacing the CPU board with my old one should get also it going again. You'll probably need to remove several other boards and the rear panel to do it. Time consuming but not difficult.
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Post by dyoungers on Apr 6, 2021 16:44:00 GMT -5
I removed the rear panel already before realizing there was an unmarked slot for the connector. At this point it wouldn't take much to pull the boards if I can't get the board working.
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Post by Deleted on Apr 6, 2021 17:45:44 GMT -5
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.
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Post by onkyohelp on May 17, 2021 11:28:32 GMT -5
Hi
Can someone help me use J-link to flash an onkyo 616 please
I will appreciate your help very much
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Post by onkyohelp on May 17, 2021 17:59:56 GMT -5
I need help with the vmpu
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