Panasonic TH-42PX75U - Advanced Settings and Operations; Menu Functions and Adjustments

10 Service Mode
10.1. How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [RECALL] button of the remote control three times within 3
seconds.
10.1.1. Key command
“1” button...Main items Selection in forward direction
“2” button...Main items Selection in reverse direction
“3” button...Sub items Selection in forward direction
“4” button...Sub items Selection in reverse direction
“VOL” button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
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TH-42PX75U