HP Color LaserJet CM4730 Service Manual - Page 532

Problem-solving process When the MFP malfunctions or encounters an unexpected situation, information on the control panel alerts you to the situation. This section contains an initial troubleshooting checklist that helps to eliminate many possible causes of the problem. The subsequent troubleshooting flowchart helps you to diagnose the cause of the problem. The remainder of the chapter provides steps for correcting the problems that have been identified. ● Use the initial troubleshooting checklist to evaluate the source of the problem and to reduce the number of steps that are required to fix the problem. ● Use the troubleshooting flowchart to pinpoint the cause of malfunctions. The flowchart lists the section within this chapter that provides steps for correcting the malfunction. Before beginning any troubleshooting procedure, check the following: ● Are supply items (for example, the print cartridge, fuser, and rollers) within their rated life? ● Does the configuration page reveal any configuration problems? NOTE: The customer is responsible for checking and maintaining supplies, and for using supplies that are in good condition. The customer is responsible for media and print-cartridge supplies. The customer is also responsible for replacing the fuser, transfer roller, and all paper pickup, feed, and separation rollers (tray 1 has a separation pad instead of a roller) that are at or near the end of their 225,000-page rated life. Problem-solving checklist If the MFP is not responding correctly, complete the steps in the following checklist, in order. If the MFP does not pass a step, follow the corresponding troubleshooting suggestions. If a step resolves the problem, you can stop without performing the other steps on the checklist. 1. Make sure the MFP Ready light is on and the display says Ready. If no lights are on, see Power-on checks on page 516. 2. Check the cabling. a. Check the cable connection between the MFP and the computer or network port. Make sure that the connection is secure. b. Make sure that the cable itself is not faulty by using a different cable, if possible. c. Check the network connection. See Network connectivity problems on page 615. 3. Ensure that the print media that you are using meets specifications. See Media specifications on page 13. 4. Print a configuration page. If the MFP is connected to a network, an HP Jetdirect page also prints. a. If the pages do not print, check that at least one tray contains print media. b. If the page jams in the MFP, see Paper path troubleshooting on page 554. 512 Chapter 6 Problem solving ENWW