HP LaserJet P4510 Service Manual - Page 271

Table 7-5 Manual sensor test 2 diagnostic tests Manual sensor test 2 designator Sensor or switch Q Tray 3 paper present sensor (PS1600) R Tray 3 top of stack sensor (PS1601) S Tray 3 paper size switches (SW1600) NOTE: The locations of these switches and sensors are the same as those in Figure 7-9 Checking sensors in the Tray 2 area on page 256 with respect to the optional paper input accessory. T Tray 4 paper present sensor (PS1600) U Tray 4 top of stack sensor (PS1601) V Tray 4 paper size switches (SW1600) W Tray 5 paper present sensor (PS1600) X Tray 5 top of stack sensor (PS1601) Y Tray 5 paper size switches (SW1600) Z Tray 6 paper present sensor (PS1700) a Tray 6 top of stack sensor (PS1701) b Tray 6 paper size switches (SW1700) c Envelope feeder-envelope present sensor (PS1800) Print/stop test Use this diagnostic test to isolate the cause of problems such as image formation defects and jams within the engine. The test can be programmed to stop from 0 to 60,000 ms. 1. Press Menu . 2. Press the down arrow to highlight DIAGNOSTICS, and then press OK. 3. Press the down arrow to highlight PRINT/STOP TEST, and then press OK. 4. Use the arrow buttons to set a stop time, when the print job should be interrupted, and then press OK. Table 7-6 Print/Stop settings Duration Description 0 msecs The leading edge of the paper stops approximately 28 mm beyond the "black" paper guide of the registration assembly. 100 msecs The leading edge of the paper stops approximately 63 mm beyond the "black" paper guide of the registration assembly. 500 msecs The leading edge of the paper stops just prior to the paper entering the "nip" of the fuser assembly; the nip is the gap between the pressure roller and the hot fusing roller. 600 msecs The leading edge of the paper stops approximately 5 mm prior to the paper encountering the fuser assembly delivery photo sensor flag. ENWW Troubleshooting tools 257