QM 46-2 Printing Unit No 2

Hi fellow Members
I am a new QM 46-2 operator and need some advice as to why Print Unit no 2
is not kicking in even though both LEDs are lit up on PU selector button if someone could shed some light on this it would be much appreciated.
Thankyou.

 

Does it print 1/c ok with only PU-2? When you try to print 2/c, do you notice PU-2 dropping on imp? If you see PU-2 drop during 2/c printing and still no image, you need to remove non-opp side pu-2 side cover. Check to see if eletrical solenoid Y24 is working! Y-24 is the imp stop for PU-2. When printing 1/c only on PU-2 the lever is in the up position. When printing 2/c the lever is dropped out of the way. Blanket cyl moves toward the PU-1 plt cyl, thus PU-2 plate cyl needs to move further to reach the blanket cyl.
If you would like any more help just give me a call.
Stan W/Intermountain Press Service,llc. 720-285-9485 ipsqm46.com
PS: I have numerous new & used parts avail for your press!