Panasonic Panafax UF-885 Service Manual page 61

CN3
Pin No. Signal Name
CN3-1 nETSW
CN3-2 +5VP
CN3-3 GND
CN3-4 +24V
CN3-5 pCMLD
CN3-6 pPLSD
CN3-7 nTSTSW/RMCK
CN3-8 nHSDT/RMCS
CN3-9 nHKOF/RMDT
CN3-10 nCTON
CN3-11 HYBSR
CN3-12 GND
Destination
LCU PCB CN25-1
LCU PCB CN25-2
LCU PCB CN25-3
LCU PCB CN25-4
LCU PCB CN25-5
+5V (H)
LCU PCB CN25-6
+5V (H)
LCU PCB CN25-7
LCU PCB CN25-8
Off Hook
LCU PCB CN25-9
Off Hook
LCU PCB CN25-10
H= Standby Mode, L= Ring in
LCU PCB CN25-11
LCU PCB CN25-12
Maintenance, Adjustments and Checkpoints
Signal Waveform
+5V
0V
+24V
FAX Side
0V (L)
Telephone Side
Make
0V (L) Break
On Hook
+5V (H)
0V (L)
On Hook
+5V (H)
0V (L)
0V
Function
Not Used
+5 VDC Power Supply
Ground
+24 VDC Power Supply
Line Switching Relay Drive
Pulse Dial Relay Drive
Not Used
Handset Off-Hook Detection Signal
External Phone Off-Hook Detection Signal
(Phone Line must be connected.)
Ring Detection Signal
Line Transformer Input Signal
Ground
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