Activating Pioneer KRL-32V public mode:
Make sure the TV is switched off (not in standby)
While keeping the 'VOL+' and 'INPUT' buttons on top of the TV pressed, switch on the power, until 'Public Mode' and '---' appears.
Enter the 3-digit entry code: 027
For an explanation on the Public Mode settings, see Sharp LC-32LE700 service manual