hi all 
have an issue.. i have a cpd 503, after connecting the 4 cams i use the monitor and call input to view the cams 
  
now heres the problem 
when i view from "CALL" input picture is clear.. 
now when i view from "MONITOR" input picture is fuzzy or distorted 
  
see pics below 
  
I know its not a wiring issue or power 
It has to do with the reciever 
how can i resolve the issue?? or do i have to send it in for repair???