Ncu (Us) - Ricoh B051 Service Manual

5.2.3 NCU (US)

Surge
TIP
Protection
Over-
RING
current
Protection
T1
Noise
Filter
T2
Jumpers
Item
JP7 These jumpers should be shorted when the machine is connected to a dry
line.
JP8
DB1 Also remove DB1 when the machine is connected to a dry line.
SM
CÓPIA NÃO CONTROLADA
Noise CML
Filter Relay
Surge
Protection
Current
Sensor
Description
129
CÓPIA NÃO CONTROLADA
JP7
OHDI SW.
DB1
DC Loop
JP8
NCU
Ring
Detection
Circuit
BOARDS
TRXD
L-
Transformer
OHDISW
CMLSW
Hook0
Hook1
ExRing
B502D520.WMF
B502