Anyone take it apart and have a picture of the FC-300 inside? Thanks!
Was looking for pictures of the PCBs of the FC300 on the internet and couldn't find any. So I had to take one myself.
I did not expect to find this many boards. I found:
* a main board with the small buttons, the displays, and connectors for power and midi.
* a seperate board with the jack connections for external pedals
* two boards for the footswitches and leds
* a small board for the rrc2 connection
* a small board for the led of expression pedal 2
* two small boards for the potmeters of both expression pedals
(https://www.vguitarforums.com/smf/proxy.php?request=http%3A%2F%2Fwww.snapagogo.com%2Fuploads%2Fsource%2F912016%2F1459521686_280167230_InsideFC300.jpg&hash=0eb7c3b78246d925674fdfc2b1fb2cf11fa383a9)
The reason I looked is to get some more ideas for the VController v2
It's convention in most consumer products to use separate PCB Board for high speed CPU / DSP, LCD fine pitch components as these often require 4 to 8 layer PCBS and these cost more , so they design a relatively small PCB.
Then for low speed I/0 switches, they design a separate larger one or two layer PCB often only for switches and analog I/O Connectors with ribbon cable connections between the PC boards
This design strategy lowers the final manufacturing cost, and lowers the EMI / FCC / CE Emissions
This strategy has been used on every Boss GT-x / VG-x ever made.
GT-100
(https://www.vguitarforums.com/smf/proxy.php?request=http%3A%2F%2Fwww.tonymckenzie.com%2FSite%2Fimages%2Flatest_images%2Fmainboard1.JPG&hash=05d45c66536c45d2b2f21aec625e3b908dad52ee)
GP-10
(https://www.vguitarforums.com/smf/proxy.php?request=http%3A%2F%2Fwww.tonymckenzie.com%2FSite%2Fimages%2Fimages-2014%2Finside-the-gp-10.jpg&hash=061b4346e995ffaa559fcec41f284cad8e65365e)
VG-99 (oberseve the added copper EMI shielding in between the PC boards, lowers noise, but also important for passing global EMI / CE / FCC emission standards - since the VG-99 used a Plastic Chassis,it is more difficult without the copper EMI shields
(https://www.vguitarforums.com/smf/proxy.php?request=http%3A%2F%2Fwww.snapagogo.com%2Fuploads%2Fsource%2F2692013%2F1380288014_1721439470_ScreenShot20130927at6.18.35AM.png&hash=c44b6c609415b2e132f75acc3415844c3bc1ceda)
FCB-1010
(https://www.vguitarforums.com/smf/proxy.php?request=http%3A%2F%2Fhost.mtnsys.com%3A81%2Ffaq-fcb%2FFirmwa1.jpg&hash=1ec2fb9cce8bf75ea1cbdea9a550c2951bf1b8b9)
Peaking inside the GR-55 and the GP-10, there are 2 main boards with an extra one for the GK connector - which is needed to get the lock of the 13 pin plug on the right side.
The stair stepped design of the FC-300 explaines the two boards for the switches. I just did not expect an extra board for jack i/o and for the main board to be separate as well...
Good reference for understanding control of EMI /RF Emissions
http://www.audiosystemsgroup.com/RFI-Ham.pdf (http://www.audiosystemsgroup.com/RFI-Ham.pdf)
http://www.audiosystemsgroup.com/ (http://www.audiosystemsgroup.com/)