Onkyo TX NR808 DSP replacement

srt Junior Member Posts: 90	Onkyo TX NR808 DSP replacement Aug 15, 2021 22:54:50 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by srt on Aug 15, 2021 22:54:50 GMT -5 I got RX NR808, with no sound , problem is DSP chip , it is 300mhz version(d830k013bzkb3), Can i replace it with 400MHz version(d830k013bzkb4)?

Deleted
Deleted Member

Posts: 0

Onkyo TX NR808 DSP replacement Aug 16, 2021 16:19:38 GMT -5

Quote

Post by Deleted on Aug 16, 2021 16:19:38 GMT -5

I also had a TX-NR808 with a failed DSP 300Mhz version and I tried fitting the 400Mhz version but it didn't work.

I couldn't find a source for a replacement 300Mhz version, so I scrapped it as I figured it wasn't repairable.

srt
Junior Member

Posts: 90

Onkyo TX NR808 DSP replacement Aug 18, 2021 6:55:50 GMT -5

Quote

Post by srt on Aug 18, 2021 6:55:50 GMT -5

i measured the power supply rail of dsp (d830k013bzkb3) its showing 1.47volt, but in all other d830k013bzkb4 its 1.91 volt (eg: onkyo 616, 609 onkyo 515 etc )

It was my mistake , what I am trying to say that there is slight voltage level difference in main core voltage of 400mhz an 300 mhz dsps , 300mhz voltage is slightly less than 400mhz 1.147 and 1.191 Voltage respectively

Last Edit: Aug 18, 2021 8:33:38 GMT -5 by srt

Deleted Deleted Member Posts: 0	Onkyo TX NR808 DSP replacement Aug 18, 2021 7:22:32 GMT -5 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Deleted on Aug 18, 2021 7:22:32 GMT -5 Looking at page 26 of the service manual, the DSP has two supplies from separate regulators: Q3107 supplies VDD_DA8x +3.3V Q3109 supplies VDD CORE +1.15V

Deleted Deleted Member Posts: 0	Onkyo TX NR808 DSP replacement Aug 18, 2021 7:27:30 GMT -5 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Deleted on Aug 18, 2021 7:27:30 GMT -5 Looking at the service manual for the TX-NR809 which uses the 400MHz chip, that has +3.3V and 1.2V supplies so almost exactly the same as the 300Mhz chip.

srt
Junior Member

Posts: 90

Onkyo TX NR808 DSP replacement Aug 18, 2021 8:34:05 GMT -5

Quote

Post by srt on Aug 18, 2021 8:34:05 GMT -5

Aug 18, 2021 7:27:30 GMT -5 andyb1712 said:

Looking at the service manual for the TX-NR809 which uses the 400MHz chip, that has +3.3V and 1.2V supplies so almost exactly the same as the 300Mhz chip.

It was my mistake , what I am trying to say that there is slight voltage level difference in main core voltage of 400mhz an 300 mhz dsps , 300mhz voltage is slightly less than 400mhz 1.147 and 1.191 Voltage respectively

Deleted
Deleted Member

Posts: 0

Onkyo TX NR808 DSP replacement Aug 18, 2021 9:04:21 GMT -5 via mobile

Quote

Post by Deleted on Aug 18, 2021 9:04:21 GMT -5

I understand what you mean now. I checked the two chips for pin compatibility and both are identical. Supply voltages are close enough to not make any difference in my opinion.

It didn't work for me and I tried changing the crystal and replacing the NAND as well.

The 400Mhz DSP chip isn't too expensive to try fitting. I don't think you have much to lose as I couldn't find a 300Mhz one.

albertto: Hi everyone. This is my first post here, so greetings to everyone. I hope to help and get helped in my diy prjects or other stuff. Thank you in advice!! Nov 2, 2024 12:45:30 GMT -5 *

zerolearner: Hi team members I'm new to the forum. I have denon X2000 firm issue I replaced the new ADSP IC but upload the firmware via USB port I got a error message connection failed 5A. FLAG0 present 0.84V is there any JTAG programmer for update the firmware. Sept 30, 2024 22:36:28 GMT -5

redpill: Would you able to provide more details in regards to your fix. Did you replace faulty unit or fixed yourself? I'm having similar problem and wonder how to approach it. Thanks. Lucas. Sept 8, 2024 1:10:29 GMT -5

Post by srt on Aug 15, 2021 22:54:50 GMT -5

Post by Deleted on Aug 16, 2021 16:19:38 GMT -5

Post by srt on Aug 18, 2021 6:55:50 GMT -5

Post by Deleted on Aug 18, 2021 7:22:32 GMT -5

Post by Deleted on Aug 18, 2021 7:27:30 GMT -5

Post by srt on Aug 18, 2021 8:34:05 GMT -5

Post by Deleted on Aug 18, 2021 9:04:21 GMT -5

Shoutbox