HP LaserJet II Serie Manual De Instrucciones página 250

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Table 7-51. Communications Checks (continued)
5.
If using a serial interface, is
the cable longer than 50 feet (15
meters)?
6. If using a Centronics parallel
cable, is it over 10 feet (3 meters)
long?
7.
Do all the current Control
Panel Configuration Menu
items match the host system's
parameters?
8.
Does the printer have a bad
interface port?
9. Does the host have a bad
interface port?
The mdmum recommended cable length for RS-232 serial
communications is 50 feet. Use RS-422 or move the printer
closer to the host.
Consider using a serial interface connection or move the
printer closer to the host.
Make appropriate changes. If host system changes are made,
be sure to reboot the system or otherwise ensure the changes
are in effect.
If possible, try a different printer interface than the one
having a problem and reconfigure the printer and host.
If possible, try a different host system port than the one
having a problem and reconfiWre both the host and printer
appropriately.
If the host system and printer are still not communicating and steps 1 through 9 have been
completed, replace the Interface/Formatter PCA and reconfigure the printer. If the problem
persists, a protocol analyzer maybe required to determine the source of the problem.
Caution
HP LaserJet printers are not designed to work with mechanid switch box
@
produck without proper surge protection. These devices can generate voltages
in excess of standard interface specifications, causing permanent damage to the
Interface/Formatter PCA. This circumstance is not covered by Hewlett-Packard
warran~.
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