HP Color LaserJet CM4730 Service Manual - Page 534
Problem-solving flowchart, appropriate in this and follow the instructions there.
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Problem-solving flowchart This flowchart highlights the general processes that you can follow to quickly isolate and solve MFP hardware problems. Each row depicts a major troubleshooting step. A "yes" answer to a question allows you to proceed to the next major step. A "no" answer indicates that additional testing is needed. Proceed to the appropriate section in this chapter, and follow the instructions there. After completing the instructions, proceed to the next major step in this troubleshooting flowchart. Table 6-1 Troubleshooting flowchart 1 Power on Is the MFP on and does a readable message appear? Yes No Follow the power-on troubleshooting checks. See Power-on checks on page 516. After the control panel display is functional, go to step 2. 2 control panel messages Does the message Ready appear on the control panel display? Yes No If an error message appears, see Control-panel messages on page 517. After the errors have been corrected, go to step 3. 3 Event log Open the Troubleshooting menu and print an event log to see the history of errors with this MFP. Does the event log print? Yes No If the event log does not print, see Engine test on page 617. If paper jams inside the MFP, see Paper path troubleshooting on page 554. If error messages appear on the control panel display when you try to print an event log, see Control-panel messages on page 517. After successfully printing and evaluating the event log, go to step 4. 4 Information pages Open the Information menu and print the configuration pages to verify that all of the accessories are installed. Are all of the accessories installed? Yes No If accessories that are installed are not listed on the configuration page, remove the accessory and reinstall it. For more information about optional output devices, see Understand accessory lights for the 3-bin mailbox and stapler/ stacker on page 550. After evaluating the configuration pages, go to step 5. 5 Copy/scan Can you successfully make a copy from both the ADF and the scanner glass? Yes No If paper jams inside the ADF, see Paper path troubleshooting on page 554. If you cannot make a copy from the scanner glass, see Using the scanner tests on page 581. After you can successfully copy, go to step 6. 6 Image quality Does the print quality meet the customer's requirements? Yes No Compare the images with the sample defects in the image defect tables. See Image defect examples on page 585. After the print quality is acceptable, go to step 7. 514 Chapter 6 Problem solving ENWW