HP 5 C3916A, C2021A, 5n C3952A, 5m C3917A, 4 plus C2037A, 4 C2001A manual Communications Checks

Communications Checks

Table 7-30		Communications Checks
	Checks		Action
Is your computer configured to the			These parameters are required to
parameters described in the			communicate with the printer. Verify your
configuration instructions?			computer’s communications port
			configuration matches these parameters.
			Note: If these parameters are not set
			properly, they may yield a 40, 20, or
			22 ERROR on the printer’s Control Panel.
For Serial Communications only
Does the printer’s baud rate match that			Run the printer’s Self Test to verify the
of the computer’s communications port?			baud rate setting. At the computer, verify
			that the baud rate is set correctly in any
			configuration files.
			Note: A baud rate problem may cause a
			40 ERROR.
Are you using the correct cable for			See the cable wiring in Chapter 3.
communications between the computer
and the printer?			Hint: On an RS-232 cable, pins 2 and 3
			may need to be reversed at the
			printer-end of the cable.
Are you using the correct RS-232-C			During the communications “handshake,”
protocol?			the printer transmits both the XON/XOFF
			signal, and the DTR signal. The DTR
			(Data Terminal Ready) signal may be
			either negative going, or positive going.
			DTR polarity is set at the printer’s Control
			Panel. The XON may be set to normal
			(only transmitted when data is needed),
			or Robust XON (transmitted every
			second). This feature is configurable from
			the Control Panel. DTR is available at pin
			20, and XOFF is transmitted from pin 2
			of the printer.

7-54 Troubleshooting