HP LaserJet 1100 Service Manual - Page 116

Table 5-1. Basic troubleshooting Verification steps Possible problems Solutions Print an engine test, which is discussed Control panel displays an error later in this chapter. The engine test light. should print without paper feed problems or print quality problems. Also Self test does not print. print self test (follow the instructions under "Printing self test" later in this chapter). Paper does not move smoothly through the printer paper path. Consult the list of common messages in Chapter 2, or "Fatal errors" in this chapter to correct the error. If the engine test is successful, but the self test does not print, replace the formatter. Isolate printer paper path problems by performing a paper path check, which is discussed later in this chapter. Poor print quality. See "Solving image defects" later in this chapter. Is the copy function operational? Poor copy quality. If the print quality from the self test and engine test was acceptable, but the print quality of the copies is not, clean the contact image sensor and the white roller, and then recalibrate the document scanner. If, after performing the maintenance, the problem persists, replace the contact image sensor or document scanner. Place the self test into the document scanner input bin and copy it to the printer. Self test should feed smoothly through the document scanner path and copies should print without print quality problems. Paper does not move smoothly through the document scanner path. Clear the document scanner path of obstructions. Check photosensor to make sure that it operates correctly. If the problem persists, replace the document scanner. Is the software installed correctly? Software is not installed or an error occurred during software installation. Uninstall the software. Reload the product's software. Make sure you use an ECP port setting. Does the product print from the computer? The parallel cable is not connected. Connect the cable. Connect the parallel cable to the product and the computer. Use a word processing application to send a print job to the printer. An incorrect printer driver is selected. Other devices are connected to the parallel port. Reset the printer driver. Disconnect the other devices and try again to print. There is an LPT port driver problem in Windows 95/NT. Reset the computer's port settings. Formatter failure - replace formatter. Does the product scan to the computer? Other devices are connected to Disconnect the other devices and try again to scan. the parallel port. Initiate a scan from either the computer's basic desktop software or from the product. The computer's parallel port hardware is not bidirectional. Check hardware documentation to see if the port configuration can be changed. The BIOS settings for the parallel Reset the computer's port settings. If the problem port are set incorrectly. persists, reset the BIOS settings in CMOS. Polling is turned off in Document Assistant or Document Assistant is not running. Start Document Assistant, turn on polling. C4224-90962 Basic troubleshooting 121