Xerox C2424 Service Manual - Page 162

Service Diagnostics The system has built-in diagnostics to aid in troubleshooting problems with the system components. The Service Diagnostics menu provides a means to test sensors, motors, switches, clutches, solenoids, fans, and power supplies. Diagnostics also contain functions to report system status and some NVRAM access. Service diagnostics are to be executed through the control panel by a certified service technician only. Service Diagnostics Menu Functions The system reboots while entering or exiting all diagnostic modes. The system keeps the thermals hot during diagnostics to avoid unnecessary cleaning cycles. If a diagnostic test runs into a problem while initializing the heaters a message displays, "Test Fault, can't warm up - press any button", you can still continue to run diagnostics under this condition. Important Information While Performing Service Diagnostics Heaters and Thermals: When entering diagnostics, if the printhead temperature is approximately 32o Celcius, the system is assumed to be warm and the heaters are turned ON to maintain the warmed-up state. Otherwise, they will remain OFF. Utilize the Exercise Heaters function if it is necessary to turn ON/OFF the heaters. Select All Heaters On to warm-up. Print Engine Tests: In general, diagnostic testing is assumed to be done with the system in a "diagnostic configuration." This means the following applies: ■ Doors are closed unless instructed otherwise. ■ The print engine is thermally warm (at nominal printing temperatures). ■ All axis's are or have been moved to their HOME position (run MECH INIT function). ■ Trays are inserted and contain A/A4 media, unless instructed otherwise. The tests may also be performed with the system operating at less than normal printing temperatures, but may produce slightly less typical results. 4-4 WorkCentre C2424 Service Manual