Ncu - Ricoh FACSIMILE FAX77 Field Service Manual

4. NCU

CN1 - Network
Pin Name
1
L1 To/From the network
2 L2 To/From the network
T1 To/From the external phone
3
4 T2 To/From the external phone 0
5 GS Ground start terminal
CN2 - FCU
See FCU CN18. The pins are reversed. For
example, pin A1 on the FCU is pin A11 on
the NCU.
CN3 - Test Points
Pin Name
1 XL1 To/From the network
2
XL2 To/From the network
3 XTT1 To/From the external phone
4
XTT2 To/From the external phone 0
Function
Function
5. OPU
CN1 - FCU
See FCU CN15.
V
CN2 - B4 Document Width Sensor (SB-3) -
Asia only
Pin
1
0
2
3
V
7-7
Name Function
5SB3B SB-3 output (L: Paper present) 0
+ 5V Supply
COM1 Ground
V
1
0