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December 2006
6-46
WorkCentre M20, 4118, FaxCentre 2218 Family
GP 13
General Procedures and Information
M20 FAX Transceiver
General
This circuit processes transmission signals of modem and between LIU and modem.
Modem (U44)
FM336 is a single ship fax modem. It has functions of DTMF detection and DTMF signal pro-
duction as well as functions of a modem. TX A1, 2 is a transmission output port and RX IN is a
received data input port. / POR signal controlled by MFP controller (U3:ARM946ES) can initial-
ize modem (/M_RST) without turning off the system. D0-D7 are 8-bit data buses. RS0-RS4 sig-
nals to select the register in modem chips. /RS and /WR signals control READ and WRITE
respectively. /IRQ is a signal for modem interrupt.
Transmission speed of FM336 is supported up to 33.6k.
The modem is connected to LINE through transformer directly, refer to Figure 4.
Figure 4 Fax transceiver
4118/2218 SmartDAA FAX Technology
General
SmartDAA System Side Device (CX86710) and Line Side (CX20493) enables the 4118 to
communicate with other FAX machines. Communication speeds are able to reach 33.6kbps.
The SmartDAA technology only requires a RJ-11 jack connected to a telephone line. Commu-
nication with other FAX machines are then managed via software. The LIU hardware configu-
rations are no longer country dependant therefore there is no need for different LIU PBA’s.
Modem (U44)
FM336 is a single ship fax modem. It has functions of DTMF detection and DTMF signal pro-
duction as well as functions of a modem. TX A1, 2 is a transmission output port and RX IN is a
received data input port. / POR signal controlled by MFP controller (U3:ARM946ES) can initial-
ize modem (/M_RST) without turning off the system. D0-D7 are 8-bit data buses. RS0-RS4 sig-
nals to select the register in modem chips. /RS and /WR signals control READ and WRITE
respectively. /IRQ is a signal for modem interrupt.
Transmission speed of FM336 is supported up to 33.6k.
The modem is connected to LINE through transformer directly, refer to Figure 4.
Содержание M20 - WorkCentre B/W Laser
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Страница 5: ...December 2006 Xerox WorkCentre M20 4118 FaxCentre 2218 Family Service Manual...
Страница 10: ...December 2006 ii WorkCentre M20 4118 FaxCentre 2218 Family Introduction...
Страница 40: ...December 2006 1 2 WorkCentre M20 4118 FaxCentre 2218 Family Service Call Procedures...
Страница 46: ...December 2006 1 8 WorkCentre M20 4118 FaxCentre 2218 Family SCP 7 Service Call Procedures...
Страница 48: ...December 2006 2 2 WorkCentre M20 4118 FaxCentre 2218 Family Status Indicator RAPs...
Страница 54: ...December 2006 2 8 WorkCentre M20 4118 FaxCentre 2218 Family 6 1 Status Indicator RAPs...
Страница 64: ...December 2006 2 18 WorkCentre M20 4118 FaxCentre 2218 Family 9 5 9 6 Status Indicator RAPs...
Страница 68: ...December 2006 2 22 WorkCentre M20 4118 FaxCentre 2218 Family 10 3 Status Indicator RAPs...
Страница 72: ...December 2006 2 26 WorkCentre M20 4118 FaxCentre 2218 Family 20 3 Status Indicator RAPs...
Страница 78: ...December 2006 3 2 WorkCentre M20 4118 FaxCentre 2218 Family Image Quality...
Страница 100: ...December 2006 4 2 WorkCentre M20 4118 FaxCentre 2218 Family Repairs and Adjustments...
Страница 110: ...December 2006 4 12 WorkCentre M20 4118 FaxCentre 2218 Family REP 1 7 Repairs and Adjustments...
Страница 134: ...December 2006 4 36 WorkCentre M20 4118 FaxCentre 2218 Family REP 5 3 Repairs and Adjustments...
Страница 138: ...December 2006 4 40 WorkCentre M20 4118 FaxCentre 2218 Family REP 7 1 Repairs and Adjustments...
Страница 146: ...December 2006 4 48 WorkCentre M20 4118 FaxCentre 2218 Family REP 8 6 Repairs and Adjustments...
Страница 158: ...December 2006 4 60 WorkCentre M20 4118 FaxCentre 2218 Family ADJ 1 1 Repairs and Adjustments...
Страница 160: ...December 2006 4 62 WorkCentre M20 4118 FaxCentre 2218 Family ADJ 5 1 ADJ 5 2 Repairs and Adjustments...
Страница 162: ...December 2006 5 2 WorkCentre M20 4118 FaxCentre 2218 Family Parts Lists...
Страница 206: ...December 2006 5 46 WorkCentre M20 4118 FaxCentre 2218 Family Part Number Index Parts Lists...
Страница 208: ...December 2006 6 2 WorkCentre M20 4118 FaxCentre 2218 Family General Procedures and Information...
Страница 276: ...December 2006 6 70 WorkCentre M20 4118 FaxCentre 2218 Family GP 26 General Procedures and Information...
Страница 280: ...December 2006 7 2 WorkCentre M20 4118 FaxCentre 2218 Family Wiring Data...
Страница 308: ...December 2006 7 30 WorkCentre M20 4118 FaxCentre 2218 Family Wiring Data...
Страница 310: ...December 2006 8 2 WorkCentre M20 4118 FaxCentre 2218 Family Accessories...
Страница 314: ...December 2006 8 6 WorkCentre M20 4118 FaxCentre 2218 Family ACC 2 Accessories...