Post by andyb1712 on Sept 20, 2021 12:48:42 GMT -5
The chips I bought from China so far haven't looked like they have been sanded and relabeled or are salvaged parts. I may have damaged some of the BGAs fitting them as they take quite of lot of heat to solder down.
Post by andyb1712 on Sept 20, 2021 16:19:01 GMT -5
It would be a good option but without some knowledge of how to interface with the DSP and have firmware in the correct format to load, it will be difficult to proceed.
The D variant chips in my photos were checked and compared to original B/C ones under a microscope and I couldn't see any signs they had been tampered with.
So far they are working fine in my 55/56/86 and my 86 is in daily use as my main audio system. It's still only at hundreds of hours use though, not thousands. If they last as long as the originals I'll be quite happy!
Luckily for me, my Pioneers with BGA chips (LX55, VSX2021) have only had one device fitted. The LX56/86 models have 2 x QFP chips and I changed both in all 3 units I've repaired. It's hard to tell if one or both has failed and they are quite cheap to buy. it also saves taking the board out twice. I don't think I would like to try a fix a dual BGA model like your LX85!
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