Did some testing today.
Ch5/ec18 pin 16 had external pull up from ec36 pin 28. Dropped to 0 when i removed the pull up connection. I guess the pull up needs to be there for temp sensor also.
Ec18 pin 12 was ch7, tested via 2k7 to ground.
Will look for the ch6, according to picture of pin out, there is 2 empty pins where i might connect it? But, when i look the circuit board, there seems to be some kind of connections anyway on those pins?
And where is the ec18 pin1 (knock2) connected? there should be only 1 knock channel.
(i will be happy if i have 2 extra temp inputs and 1 switch input, just curious).