HP Color LaserJet CM4730 Service Manual - Page 645

Paper path sensor test The paper path sensor test checks for the presence of media at each of the sensors along the paper path. After you have selected this test from the Troubleshooting menu, you can print internal pages or send a print job from a computer. As the media passes each sensor, the sensor's state is updated. On the control panel display, each sensor is represented by a string of alphabetic letters followed by a corresponding status for each sensor. Use Table 6-20 Manual sensor test letter designations on page 626 to associate the letters that are shown on the control panel display with the sensor that they represent. A "0" next to the letter indicates that no media is present. A "1" indicates that media is present. Press Stop to stop the job, and then touch Exit Diagnostics to exit the special diagnostics mode. Figure 6-4 Tray 2 paper size switch arrangement Table 6-19 Tray 2 paper size codes Size code Switch state SW1 SW2 0 On On 1 On Off 2 Off On 3 Off On 4 On On 5 Off Off 6 On Off 7 Off Off SW3 On On Off On Off On Off Off Paper size Custom (see note below) Letter A5 Legal B5 (JIS) Executive A4 tray not installed NOTE: Depressing all three switches of the Tray 2 paper size levers causes the Custom Paper menu to appear on the control panel display. Touch Back to return to the sensor diagnostic screen. ENWW Tools for troubleshooting 625