Panasonic TC-42PD1FA Operating Instructions Manual page 16

Connections
How to connect the REMOTE Terminal
The REMOTE terminal is reserved for use with future compatible components.
How to connect the TUNER Input Terminal
The TUNER Input terminal is reserved for use with future external compatible components.
16
TUNER IN
The Wide
Plasma Display
rear terminals
PC IN
TUNER IN
The Wide
Plasma Display
rear terminals
PC IN
REMOTE
SERIAL
REMOTE
SERIAL