Ricoh Aficio 1013 Service Manual page 154

MAIN PCBS
6.5.3 NCU (NETWORK CONTROL UNIT)
The NCU implements the interface between the fax system and the telephone
network. An NCU is standard on model B046, and is included as part of the fax
option for B044 and B045.
North America version
NCU
TIP
Surge
LINE
Protect
RING
Surge
Protect
Noise
Filter
FG
TEL
T1
R1
Europe/Asia version
NCU
LINE
SHUNT
T1
TIP
Surge
Protect
RING
R1
Surge
GS
Protect
TEL
SHUNT
T1
R1
GS
Jumper on Europe/Asia version
TB1 Jumper TB1 must be opened on machines installed in Hong Kong.
B044/B045/B046
Noise
Filter
Currect
Detect
Surge
Protect
CMLSW
Noise
Filter
Currect
Detect
FG
GS
CMLSW
BR
Surge
Protect
Surge
BR
Protect
OHDI Sw.
6-12
JP (Dry Line)
OHDI Sw.
DC-Loop L-Trans
JP (Dry Line)
H-Trans
Ringing
Detect
B046D555.WMF
DO Sw.
DC-Loop L-Trans
Ringing
Detect
B046D556.WMF
TRXD
OHDISW
CMLSW
HOOK0
HOOK1
RITONE
EXRING
RITONE
DCLSW
TRXD
DOSW
OHDISW
CMLSW
HOOK0
HOOK1
EXRING
RCSEL
GSSW
SM