Panasonic UF-890 Service Manual page 64

Pin No. Signal Name
CN3-9 nHKOF/
RMDT
CN3-10 nCTON
CN3-11 HYBSR
CN3-12 GND
CN3-13 HYSIG
CN3-14 pTCKD
CN3-15 pEAKD
CN4
Pin No. Signal Name
CN4-1 GND
CN4-2 GND
CN4-3 +5V
CN4-4 CID0
Destination
LCU PCB
CN25-9
Off Hook
LCU PCB
CN25-10
H= Standby Mode, L= Ring in
LCU PCB
CN25-11
LCU PCB
CN25-12
LCU PCB
CN25-13
LCU PCB
CN25-14
LCU PCB
CN25-15
Destination
DRAM Card
DRAM Card
DRAM Card
DRAM Card
Signal Waveform
On Hook
+5V (H)
0V (L)
0V
Signal Waveform
0V
0V
+5V
+5V(H)
0V(L)
64
Function
External Phone Off-Hook Detec-
tion Signal (Phone Line must be
connected.)
Ring Detection Signal
Line Transformer Input Signal
Ground
Not Used
Not Used
Not Used
Function
Ground
Ground
+5 VDC Power Supply
H: Card Not Installed L: Card
Installed