The labels are transposed on the silkscreen. Good job spotting it!Skips wrote: Also I had a problem with the sound at first, certain sounds were way too quiet as if the sound channels were improperly balanced (Mario 3 sounded pretty bad). I later came to find out that my power PCB was labeled wrong. I ended up having to run CPU pin 1 to the CPU Pin 2 pad and CPU pin 2 to the CPU Pin 1 pad. Once I did that it sounded perfectly. I am not sure what was up with that because the labels were in the same place as Tim's Tutorial. It is OK thought, once I figured out what was up I got it working with only a minor inconvenience (and no I did not just wire them to the wrong place, I triple checked it to make sure it was not just a brain fart).
I don't know how I managed to bugger that up... I'll put a note about it in the installation guide and send an email to everybody who's bought one so far.
I'll make an installation guide for the newer Famicom board layout next week (if I get time).Skips wrote: One thing people also need to be aware of is the install instructions will not work with a GPM-02 Famicom. The kit should work but it does take a bit of a different way of doing it than what Tim shows in his instructions.
These are correct. You will really notice it if you mix them up.RGB32E wrote: Oooooooh.... I knew something didn't sound quite right. I'll have to swap the two CPU audio pins soon. Did Tim label the 45/46 pins correctly on the PA PCB? I found it interesting that both required connections despite having to cut the trace to pin 45. Seems like 45/46 are both mixed regardless of expansion audio - possibly for active noise cancellation? When I tried disconnecting 45 from the PA and played a non expansion audio cart I noticed a significant amount of noise on the output!
Pin 45 is connected to a low impedance bias voltage. Basically, it puts silence into the input. Without it, you will hear the sound of the data bus coupled into pin 46 from the parasitic capacitance.