Hmm...I don't see any coin sensitivity adjustment screw with that particular coin comparitor.
If it once before worked taking all different types of dollar coins, then the rake was probably propped open.
Remember, it's a coin comparitor...that means it only compares coins with the one that placed in the Sample Coin and kicks everything else out the side door that doesn't match it.
You're using different types of dollar coins, so the only way to get them thru, is to bypass the rake and solenoid.
Turn it around and remove the two screws securing the rake's solenoid to the comparitor body..
Remove the rake completely and dis-connect the small grey wires as well.
Now all coins dropped thru, will go straight down into the coin-in optics - to become registered as credits back to the machine's computer.