WD6050 hacking
MRX, thanks for the mail. You are right, there is a time where it's just too costly and complicated to hack for the benefits. I did want to scout into the unit and see if there where any simple thing. If a spare USB/Serial connector was inside or something. If everyone was driving around with this unit in their car, I would probably keep hacking for weeks. It's all about cost / benefits.
It's likely CON5 and CON8 are debug ports, they are placed perfectly for programming. Even if I had the interface, it would be difficult to decompile, etc.
For the CAN-BUS daughter board, yes, I think it's just contact closures. Of course, it's a guess from the pin markings with a pin for each usage. I have to note that there are two CAN-BUS input on this device. The main one and the one on the CD changer, they are likely handled differently.
I am now interesting how, with a 48$ adapter, CAN-BUS display can be added to this device. I suspect it's going to require a different unit. This said, many DVD players can be updated using a DISC, I presume this one can also (of course, good luck getting the signature key).
y