Lexmark T632 Service Manual - Page 75

4060-xxx 990 Service Error displays FRU 1 Mechanical linkage DC motor assembly 2 Control board Action Check the DC motor cable connector to be sure it is correctly installed at J2 on the control board. If correct, disconnect J2 from the control board and check the resistance of the motor on the cable connector. J2-1 to J2-2 measures between 115 and 135 ohms. Also check J2-1 and J2-4 to the motor case for shorts. If either the resistance is incorrect or a short is found, replace the mechanical linkage/DC motor assembly. Note: If the DC motor is shorted, it may also be necessary to replace the control board. Disconnect the motor cable J2 from the control board and check the voltages at J2 on the board. Warning: Use caution not to short adjacent pins on the connector as damage to the board could result. Pin Measured (motor idle) J2-1 +24 V dc J2-2 +24 V dc J2-5 +5 V dc J2-6 +5 V dc If any of the voltages are incorrect, replace the control board. If correct, replace the mechanical linkage/ DC motor assembly. 900 Error Code service check FRU 1 Printer POR 2 System board 3 Factory defaults 4 Sub error codes Action Turn the printer off and on several times. If Error Code 900 continues to display, go to step 2. Make sure the system board is properly seated in connector J7 on the interconnect board. Turn the machine off and on several times, waiting a few minutes between power on and power off. If Error Code 900 continues to display, go to step 3. Restore factory defaults. See "Restore EP Factory Defaults" on page 3-18. This resets the non-critical areas of the user NVRAM. If Error Code 900 continues to display, go to step 4. With Error Code 900 displayed, press Select and Return. Record the complete list of Sub Error Codes on the display. Check the "Base printer sub error codes" on page 2-6. If none of the Sub Error Codes are listed, then call your next level of support or call Lexmark. Diagnostic information 2-41