Specifications

Table A (Signals used in the FAX PWB)
PIN No.
(CN5)
Signal
name
IN/OUT Descriptions
3 /SCLINE OUT Effective input image area
6 FTXD OUT Serial communication data
7 /FRTS OUT
Serial reception ready
(Machine side)
12 /F-RESET OUT Reset signal
13 /HSYNC OUT Horizontal sync signal
14 ∼ 21,
44 ∼ 51
OUTD1 ∼
OUTD15
OUT Data to the expanded PWB
24 /FAXREQ OUT Data transfer REQ signal
25 /FAXCS IN OUTD bus enable signal
33 /PRLINE OUT Effective print area
34 /FPAGE IN Page data READY
35 /FREADY IN FAX PWB recognition signal
36 /READY OUT
READY signal on the
machine side
37 FRXD IN Serial communication data
38 /FCTS IN
Serial reception READY
(FAX side)
43 /POFF OUT Power OFF signal
54 /FAXPRD IN Video data from FAX PWB
55 /FAXACK IN Data transfer ACK signal
Table B (Signals used in PCL PWB)
PIN No.
(CN5)
Signal
name
IN/OUT Descriptions
5 /PREADY IN PCL PWB recognition signal
6 FTXD OUT Serial communication data
7 /FRTS OUT
Serial reception READY
(Machine side)
12 /F-RESET OUT Reset signal
13 /HSYNC OUT Horizontal sync signal
34 /FPAGE IN Page data READY
36 /READY OUT
READY signal on the
machine side
37 FRXD IN Serial communication data
38 /FCTS IN
Serial reception READY
(PCL side)
52 /PCLPRD IN Video data from PCL PWB
(4) 1284/USB circuit select control section
The GDI/USB PWB is connected to CN15 connector to control switch-
ing between IEEE1284 port and USB port.
If USB cable isn’t connected to the GDI/USB PWB, the /1284-EN signal
becomes LOW to allow the user of IEEE1284 port.
If USB cable is connected, the /USB-EN signal becomes LOW to allow
the use of USB port.
Since USB has priority, when USB cable is connected, it is selected.
That is, when USB cable is connected, IEEE1284 port (parallel port) is
disabled.
DM-1505
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