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Hi Baris. My understanding is the channel failures are down to the non replaceable amp chips that are fixed to the board.
The failure seems very similar to one I've come across on laptops and computer graphics cards where a thing called a ball grid array (BGA) is used to fix the chip to the PCB instead of pins. Heat and PCB flexing cause the BGA to fail and the graphics card or laptop is effectively useless. However a simple rework is effective: 10 minutes at 190C. Because the failure starts slowly and becomes worse, I don't think it can be the chips themselves that fail
Now I know your upgrade gives better sound, but do you know if anyone has tried the reflow on the chips?
Finally, I read that on some versions, particularly BM54 back (the round pin version) the chip that allows phone input and aux input is missing and has to be added. Have I misunderstood this, or was that just wrong.
x10rich wrote:Having had the Upgrade done on my BM54 by Baris, I can vouch for his services, I posted the unit on a Tuesday, I had it back by Thursday Lunchtime! Fixed my front speaker faults, and upgraded the firmware!
Geoff130 wrote:Hi Baris, I have the round pin BM54 can you do your firmware upgrade to it, I would like to get the MP3 id tags in particular.