{HEAD ~ Device} for detecting {TAIL ~ the connectivity} of a monitor and inhibiting a data reproducing operation 
{ HEAD ~ Device } for detecting { TAIL ~ the connectivity } of a monitor and inhibiting a data reproducing operation
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH