Panasonic UF-6300 Service Manual page 64

CN18
SC PCB Signal
Pin No. Name
CN18-1 L2 (T)
CN18-3 L1 (R)
CN19
SC PCB Signal
Pin No. Name
CN19-1 +5VP
CN19-2 GND
CN19-3 pCMLD
CN19-4 pCTON
CN19-5 pHKOF
CN19-6 GND
CN19-7 +24V
CN52
SC PCB Signal
Pin No. Name
CN52-1 TH1
Destination
MJR3 PCB
CN301-1
MJR3 PCB
CN301-3
Destination
MJR3 PCB
CN302-1
MJR3 PCB
CN302-2
MJR3 PCB
+5V(H)
CN302-3
MJR3 PCB
above +3V(H) Ring Detected
CN302-4
0V
MJR3 PCB
+5V(H)
CN302-5
MJR3 PCB
CN302-6
MJR3 PCB
CN302-7
Destination
Thermistor
Assembly
Signal Waveform
Signal Waveform
+5V
0V
0V(L)
0V(L)
0V
+24V
Signal Waveform
5V
0V
64
Function
Line Signal
Line Signal
Function
+5 VDC Power Supply
Ground
Line Switching Relay Drive
Signal
H : CML On
L : CML Off
Ring Detection Signal
H : Ring Detected
L : Ring Not Detected
External Phone Off-Hook
Detection Signal
(Phone Line must be
connected)
H : Off Hook
L : On Hook
Ground
+24 VDC Power Supply
Function
Thermistor Output Signal