HP Color LaserJet 9500 Service Manual - Page 339
Troubleshooting tools and procedures, Hardware and electrical troubleshooting tools
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Troubleshooting tools and procedures WARNING! You must unplug the HP color LaserJet 9500mfp before attempting to service it. When the MFP is plugged into a wall receptacle, the 110 vac cable between the printer and the scanner/ADF carries electrical current even when the MFP is turned off. Use these troubleshooting tools and procedures to help diagnose and correct problems with the printer. The following list identifies the troubleshooting tools used to solve printer problems: z Hardware and electrical. See page 337. z Image formation and print quality. See page 359. z Media and paper-path. See page 403. z Noise. See page 414. z Alphabetical error message interpretation. See page 419. z Numerical error message interpretation. See page 431. z Data and communication. See page 466. z Tray 4. See page 469. Hardware and electrical troubleshooting tools Diagnosing and troubleshooting the HP color LaserJet 9500 Series printer and the 9500mfp is similar to the procedures for other laser jet printers, but is more complicated because the product uses four print cartridges and four image drums. Engine diagnostic tools The engine diagnostic tools include: z event log (print or show): indicates high-voltage errors and calibration errors z print-quality troubleshooting: selected in diagnostics, prints print quality pages z disable cartridge check: prints normally without one or more color plane(s) z paper-path test: source, destination, duplex, copies, and sensors. z sensor test z component test z print/stop test Defeating interlocks Defeating the interlocks might be difficult because the same switch controls the front and side doors on the right side of the printer. To defeat the interlocks, use rolled up paper. z Front left door switch: 1 Defeat the front left door switch from the inside left (fuser) door and use rolled up paper. The paper should not too long so that it interferes with the diverter assembly. z Front right door and right top door (ITB access) 1 Open the right top door. 2 Remove the filter. 3 Remove two screws and remove the right upper cover. 4 Insert the rolled up paper into the switch. ENWW Chapter 7 Troubleshooting 337