Ricoh B003 Service Manual page 753

BOARDS
4.2.2 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.
B003/B004/B006/B007
CÓPIA NÃO CONTROLADA
Noise CML
Filter Relay
Current
Sensor
4-4
CÓPIA NÃO CONTROLADA
OHDI SW.
DB1
DC Loop
Surge
Protection
JP8
NCU
Ring
Detection
Circuit
Description
JP7
TRXD
L-
Transformer
OHDISW
CMLSW
Hook0
Hook1
ExRing
A895D520.WMF
SM