HP LaserJet II Serie Manual De Instrucciones página 46

HP 33440/HP 33449 COMBINED SERVICE MANUAL
The polari@ (HI or LO) of the DTR signal fine can be configured at the printer to match the host
system's requirements. The baud rate @its per second) setting of both printer and host system
must match. In the printer's Configuration Menu, ROBUST XON should be set to ON, unless
the host system is unable to handle repeating XON'S (DC1'S) at the rate of approximately one per
second whenever the printer is ready to receive data. Setting ROBUST XON to OFF will cause
the printer to issue only a single XON when it comes on fine or following an XOFF when its 1/0
buffer can once again accommodate additiond data.
Note
The HP 33440 has the additiond capability of responding to a "status request"
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sequence ([ESCI ? [DCII), providing compatibili~ with system drivem that issue
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such requests. This capability can be added to the HP 33449 using an Optional
1/0 Interface. Contact your HP sales representative for more information.
MS-DOS System Configuration
To communicate properly with the printer, the MS-DOS environment will require the
addition/modification of MODE commands in the AUTOEXEC.BAT file. Add or modi& the
MODE command(s), depending on the interface cotilgnration, as fo~ows:
Padlel MODE LPT n , , P where n is the parallel port designator to which the cable is
attached (typidly 1 or 2). (This command sequence retries sending output if timeout
errors occur.)
Serial MODE COM n : [baud rate + 100] , N , 8, 1, P where n is the serial port designator
to "-Klch the cable is attached (typidly 1, 2, 3, or 4). (This command sequence sets
baud rate, parity, number of data bits and stop bits, and retries on time-out errors.)
MODE LPT1: =COM n. (With this command sequence, any output sent to "LPT1" is
redirected to the serial port.)
Since the MODE command is an e~ernd MS-DOS command (i.e., a program named MODE.COM
is run when the command is invoked), the program file must be contained in the root directory or
in a directory specified in a preceding PATH command in the AUTOEXEC.BAT file.
Once modification to the AUTOEXEC.BAT file has been made, the computer must be rebooted for
the changes to take effect.
Note
Some PC sotiare applications override these MS-DOS configurations set using
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the MODE command. These applications must dso be configured appropriately to
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communicate properly with the printer.
In Case of Difficulty
E the preceding steps have been followed and the printer and host have matching configuration
parameters set but the printer is not operating as ~pected, refer to the "Interface
Troubleshooting" section in Chapter 7, Section 7-6.
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