Service manual

183
SEP 2006
Ver. 1.1
DP-8020E/8020P/8016P
3.10.9. FXB PC Board
CN391
CN392
FXB PCB
Pin No.
Signal Name Destination Signal Waveform Function
CN391-1 +5VP MJR PC Board
CN25-1
+5 VDC Power Supply
CN391-2 GND MJR PC Board
CN25-2
Ground
CN391-3 +24V MJR PC Board
CN25-3
+24 VDC Power Supply
CN391-4 pCMLD MJR PC Board
CN25-4
Line Switching Relay Drive
Signal
H : CML On
L : CML Off
CN391-5 nHKOF MJR PC Board
CN25-5
External Phone Off-Hook
Detection Signal
H : On Hook
L : Off Hook
CN391-6 nCTON MJR PC Board
CN25-6
Ring Detection Signal
CN391-7 AGND MJR PC Board
CN25-7
Ground
FXB PCB
Pin No.
Signal Name Destination Signal Waveform Function
CN392-1 L2 MJR PC Board
CN22-1
Line Signal
CN392-3 L1 MJR PC Board
CN22-2
Line Signal
+5
V
0V
+24
V
+5V(H)
0V(L)OFF
ON
+5V(H)
0V(L)
H: Standby Mode
L: Ringing
0V