HP Color LaserJet Enterprise CP4020 Service Manual - Page 306

When the timer trips, the control panel display shows the message PRINTING STOPPED To continue press OK. Pressing Home will print the previously selected job. If you do not want the previous job to print, press Stop first, and then press Menu. NOTE: Do not try to perform a print/stop test while the product is calibrating, because you be required to power-cycle the product. If a jam message displays on the control panel during testing, activate the door switch. Component tests Component test (special-mode test) This test activates individual parts independently to isolate problems. Each component test can be performed once or repeatedly. If you select CONTINUOUS from the dropdown menu as the repeat option, the test cycles the component on and off. This process continues for two minutes, and then the test terminates. NOTE: The front or side door interlocks must be defeated to run the component tests. Some tests may require that the ITB and print cartridges be removed. The control panel display prompts you to remove some or all cartridges during certain tests. 1. Press the Home button. 2. Press the down arrow to highlight DIAGNOSTICS, and then press the OK button. 3. Press the down arrow to highlight COMPONENT TEST, and then press the OK button. 4. Select the component test options for the test you want to run. Table 3-8 Component test details Component test Motor or solenoid number Comments TRANSFER MOTORS M1 M3 M4 M5 Activates four drum motors and the ITB motor (M1). BELT ONLY CARTRIDGE MOTORS BLACK LASER SCANNER CYAN LASER SCANNER MAGENTA LASER SCANNER M6 M1 ● M3: yellow ● M4: magenta ● M5: cyan ● M6: black M8 M8 M9 Activates the ITB motor. Activates each drum motor sequentially (K, C, M, Y). Activates the black/cyan scanner motor for 10 seconds. Activates the black/cyan scanner motor for 10 seconds. Activates the yellow/magenta scanner motor for 10 seconds. 274 Chapter 3 Solve problems ENWW