HP d640 HP D640 High-Volume Printer - Installation Manual (Printer and Accesso - Page 130

Interface Troubleshooting RS-232C/RS-422A Serial Interface Troubleshooting Table 3-7 RS-232C/RS-422A Serial Interface Troubleshooting Symptom Action The file sent to the printer will not print; no data transmitted; or the printed file is garbled. Data prints OK at first; later it becomes garbled. The data print is garbled. All other problems (1) One or more of the pin signals on the RS-232/422 cable may be incorrect. The printer uses a standard data terminal equipment (DTE) RS-232/422 connection. However, your host computer may use a different RS-232/ 422 connection, such as DCE. First, check the HP 5000 D640 Technical Reference Manual for your computer to determine if it uses a non-DTE RS-232/422 port. Then turn to Appendix C, "Host Serial and Parallel Interface" of the D640 User Manual, which documents alternate signal configurations for RS-232/422 cables. The cable may have to be modified. (2) Make sure that the communication port used by the printer matches the communication port specified by your computer. Examine the communication parameters set on your host computer. Follow the instructions in Procedure 2: Configure the Printer on Your Host System, on page 3-11, to check current configuration. Also, check the D640 Technical Reference Manual to determine how to modify these parameters on the host. To modify the communication parameters on the printer side, refer to "Comms Menu Settings" on page 4-30 of the D640 User Manual. The printer's buffer may not be set properly for your data transmission. Refer to "Comms Menu Settings" in the User Manual, and use the configuration mode to change the Buffer Full Protocol communication parameter. Use a shielded cable. Call your service representative. 3-28 Host Computer Interface Installation and Configuration