Panasonic UF-490 Service Manual page 61

LED
PNL PCB
Signal Name
Pin No.
LED-1 +5V
LED-2 LEDCT1
LED-3 LED1
LED-4 nBLCNT
Destination
LED-1
LED-2
LED-3
LED-4
Signal Waveform
+5V
0V
0V
+5V
61
Function
+5 VDC Power Supply
Ground
Ground
Power Supply for LED