Lexmark C782 Service Manual - Page 190

5061 Press Back ( ) to exit the ALIGNMENT MENU. Drift Sensors This check is used to display the status of the thermal system used to compensate for printhead drift. To perform the test: 1. Select ALIGNMENT from Diagnostics mode. 2. Select Drift Sensors. The following screen is displayed when the test is selected: Drift Sensors Drift Sensors Black Magenta Cyan Yellow Black Testing... appears, followed by the results. For example: OK Results 26 Values: Value: OK Error Open Short Range Number Description: Communication is good RIP to A/D communication error Open thermistor error Short thermistor error Range error Detected temperature in Celsius of last reading. Indicates the system is functioning properly. • If Error appears, replace the system board. See "System board removal" on page 4-89. • If a number, Open, or Short appears, check the following: a. Check the cable of the appropriate thermistor (cyan, magenta, yellow, or black) to make sure it is installed correctly to the system board and to the thermistor board. If correct, go to step b. b. Check the continuity of the appropriate cable. Replace the cable if there is no continuity. If continuity is correct, go to step c. c. Replace the appropriate thermistor assembly. If this does not fix the problem, replace the system board. To exit the test, press Back ( ) or Stop ( ). 3-12 Service Manual