FO-DC635U
5 – 20
[7] Circuit description of Dual Line Kit
(Option: FO-60DL)
1. Block diagram
2. Circuit description
1) Dual Line Control PWB
The circuit structure of Dual Line Control PWB is the same as that
of Modem Block on the Control PWB, and has G3 FAX communica-
tion function which is similar to that function of Line-1.
2) LIU PWB (Line-2)
LIU PWB (Line-2) is the same unit as LIU PWB (Line-1) and has
line I/F function for Line-2. It is controlled by Control PWB, and the
communication data line is connected to the modem on Dual Line
Control PWB.
SURGE
PROTECTION
CIRCUIT
DIODE
BRIDGE
ACTIVE
CHOKE
HI
LO
CI
DETECTOR
+5V
TXA2
MODEM
(FM336PLUS)
RIN
SPKR
TXA1
VREF
RXIN
RXIN
TXOUT
DUAL LINE
CONTROL
LIU (LINE-2)
HI
XCI1
XCI1
CML1
CML1
CML1
XCI1
SUB ASIC
LO
TXOUT
LINE-2
Fig. 13
Содержание FO-DC635U
Страница 3: ... ii MEMO FO DC635U ...
Страница 87: ...FO DC635U 5 21 MEMO ...
Страница 103: ...FO DC635U 6 16 16 Control PWB parts layout Top side F1 F2 F5 The CONTROL PWB of the model employs lead free solder ...
Страница 106: ...FO DC635U 6 19 2 LIU PWB parts layout Top side The LIU PWB of the model employs lead free solder ...
Страница 107: ...FO DC635U 6 20 3 LIU PWB parts layout Bottom side The LIU PWB of the model employs lead free solder ...
Страница 110: ...FO DC635U 6 23 3 Printer PWB parts layout Top side ...
Страница 111: ...FO DC635U 6 24 4 Printer PWB parts layout Bottom side ...
Страница 124: ...FO DC635U 8 2 MEMO ...
Страница 165: ...FO DC635U 41 ...