Panasonic UF-490 Service Manual page 57

CN15
SC PCB
Signal Name
Pin No.
CN15-1 pPCHK1
CN15-2 GND
CN15-3 GND
CN15-4 TSENCNT
CN15-5 TONER
CN15-6 +5V
CN16
SC PCB
Signal Name
Pin No.
CN16-3 T1
CN16-4 T2
CN17
SC PCB
Signal Name
Pin No.
CN17-3 L2
CN17-4 L1
Destination
SNST PCB
CN81-1
SNST PCB
CN81-2
SNST PCB
CN81-3
SNST PCB
CN81-4
SNST PCB
CN81-5
SNST PCB
CN81-6
Destination
External
Telephone
External
Telephone
Destination
Telephone Line
Telephone Line
Signal Waveform
+5V
ON
Approx.+2VDC
+5V
Signal Waveform
Signal Waveform
57
Function
Paper Detection Signal
+5V
0V
Ground
0V
Ground
0V
Toner Sensor LED Control
Signal
0V
Remaining Toner Level
Signal
+5 VDC Power Supply
Function
External Telephone Line
Signal
External Telephone Line
Signal
Function
Line Signal
Line Signal