Table 7-34. Communications Checks (continued) Checks Action If using a bidirectional parallel cable, is it longer than 10 feet (3 meters) long? The maximum recommended cable length for the printer is 10 feet (3 meters). Use a serial interface connection or move the printer closer to the host. Do all the current Control Panel Configuration Menu items match the host system's parameters? Make appropriate changes. If host system changes are made, be sure to reboot the system, or otherwise ensure the changes are in effect. Does the printer have a bad interface port? If possible, try a different printer interface than the one with the problem. Reconfigure the printer and host appropriately.
Does the host have a bad interface port? If possible, try a different host system port. Reconfigure both the host and printer appropriately. If the host system and printer still are not communicating and you have addressed the issues in Table 7-34, replace the Formatter PCA and the EIO card and reconfigure the printer. If the problem persists, a protocol analyzer may be needed to find the source of the problem. CAUTION HP LaserJet printers are not designed to work with mechanical switch-box products without proper surge protection. These devices generate high transient voltages that cause permanent damage to the Formatter PCA. This circumstance is not covered by the Hewlett-Packard warranty.
Troubleshooting the Printing System 7-83