Ncu Pcb - Kyocera Mita KM-2530 Service Manual

2-2-2 NCU PCB

120 V specifications
LINE2
LINE1
K10
TEL L1
TEL L2
220 - 240 V specifications
LINE2
LINE1
Ground start
TEL GND
circuit PC10
TEL2
TEL1
K10
TEL L1
TEL L2
Loop current
detection/tone
signal reception
circuit IC30
K11
Ring signal
External telephone
off-hook detection circuit
T40, PC40
Loop current
detection/tone signal
reception circuit IC30
Accounting
pulse elimination
circuit
L70
K11
Ring signal
detection
circuit
PC60
External telephone
off-hook detection circuit
T40, PC40
Figure 2-2-3 NCU PCB block diagram
Destination
identification
circuit
JP20, JP21, JP22
K70
transformer
DC loop/dial pulse
detection
transmission circuit
circuit
PC80
PC60
Destination
identification circuit
JP20, JP21, JP22
K70
transformer
DC loop/dial pulse
transmission circuit PC80
3DB
NCUTYPE
1, 2, 3
/ONHOOK1
/ONHOOK2
RXIN
FAXSEL
MODRXD
Line
MODTXD
T70
SHUNT
PLSDIL
RNGDET
EARTH
DCCONT
/OFFHOOK
EXTRING1
EXTRING2
TELSEL
NCUTYPE
1, 2, 3
/ONHOOK1
/ONHOOK2
RXIN
FAXSEL
MODRXD
Line
MODTXD
T70
SHUNT
PLSDIL
RNGDET
EARTH
DCCONT
/OFFHOOK
EXTRING1
EXTRING2
TELSEL
2-2-7