HP Color LaserJet CM4730 Service Manual - Page 646

Manual sensor test The manual sensor test indicates the status of the sensors and switches in the MFP. On the control panel display, each sensor is represented by a string of letters followed by a corresponding status for each sensor. Except for the paper size switches, a "0" next to the letter indicates that no media is present or the switch is open. A "1" indicates that media is present or the switch is closed. For the paper size switches, the number ranges from 0 to 7 to indicate the state of the three switches. Use Table 6-20 Manual sensor test letter designations on page 626 to associate the letters that appear on the control panel display with the switch or sensor that they represent. Note that both uppercase and lowercase letters are used. Table 6-20 Manual sensor test letter designations Letter Component Letter Component A Top sensor O Tray 2 size sensors 1, 2, 3 B Fuser inlet sensor 1 P Tray 3 paper sensor C Fuser inlet sensor 2 Q Tray 3 paper surface sensor D Delivery sensor R Tray 3 paper size sensors 1, 2, 3 E Duplexer switchback sensor S Tray 4 paper sensor F Output bin full sensor T Tray 4 paper surface sensor G Developing alienation sensor U Tray 4 paper size sensors 1, 2, 3 H Fuser pressure release sensor V IPTU1 sensor I Media sensor (see Values for I (media sensor) W IPTU2 sensor on page 626) J Media type misprint sensor K Door sensor L Tray 1 paper sensor M Tray 2 paper sensor N Tray 2 paper surface sensor Manual Sensor Test operates sensors A, B, C, D, E, F, G, H, I, J, K, L, M, N, P, Q, R, S, T, U, V, and W. Paper Path Sensor Test operates sensors A, B, C, D, E, F, G, H, I, J, V, and W. Values for I (media sensor) ● 0 = unknown ● 1 = normal ● 3 = recommended overhead transparency ● 4 = glossy media ● 5 = gloss film ● 7 = heavy 626 Chapter 6 Problem solving ENWW