Originally Posted by mozart33
thank you for this useful piece of information. how to determine if a "D" chip is not a "B" rebranded one? is the chip internal ID available in a service menu?
by the way, how can I view how many hours of service my TX-NR5009 receiver has? (holding display/on/standby) doesn't work on this model...
Unfortunately I know of no way to confirm if the chip is a true "D rev". Some of the "tricks" I have found after buying a number of chips from various sources are:
1) using jewelers glasses, I visually inspect the top and bottom of the chip
- Onkyo often places an indelible ink spot on the chip. It can be silver, blue or white but it is really hard to get off so I look for traces of it and often find spots the reseller couldn't remove
2) I have received DSP chips with the wrong size of solder ball. This is obvious if you have a good one to compare it to but may be hard if you don't have experience
I was fortunate to have purchased a number of 300Mhz chips from an authorized TI dealer so I had a good baseline to start with. I have used almost all of those chips at this point but the tops were absolutely clean, the logo was clear and the solderballs were all 0.60mm
Of the chips I have bought from eBay and AliExpress some work and some don't. Obviously, that is easy to spot once you install them. The issue for me is that I used a couple of these to rebuild receivers that I gave to my family. Every one of those has failed. Some failed after 6 months and one lasted over a year but all were used pretty lightly so the only ones I trust now are those I personally remove from an Onkyo board. There are a couple of vendors on eBay who sell broken boards for $15.00 + $4.00 shipping which is actually cheaper than what I paid for the real chips (about $24.00) as well as what I see for pricing on the Chinese reworked ones (generally about $30).
Note that some of the chips branded as "D Rev" on eBay are new but they have an "X" as the first number (XD830K013DZKB4). TI wouldn't tell me what the difference with these chips was but I bought 4 and they don't work properly. Normal surround sound works, USB works and Network works but they won't play any streaming data (like a MP3 file off USB or any Internet Radio channels on the Network). After finding this I stopped trying them so other issues may be present as well.
With respect to the "DISPLAY / ON STANDBY" approach, some Onkyo models will only go into Engineering mode if the volume is set to a specific value. This value seems to differ between models but if you perform a full reset first (Press and hold "VCR/DVR" and then touch the "ON/STANDBY" button - the display should say "CLEAR" and then the unit will shut off), it will set the volume to the correct value. You might want to try that first.
After you perform a reset the menu's may appear. If it helps, I created a video showing how this works to find the hours of use: