Lexmark 11C0200 Service Manual - Page 82

Poor Color Reproduction Possible Cause Action Defective AIDC Replace the image transfer belt assembly (customer replaces this). Replace the mechanical controller board (PWB-A). Replace the high voltage assembly (HV1). Replace the humidity sensor (HS1). Replace the mechanical controller board (PWB-A). Defective paper image transfer Sensor Service Check 1. When a paper jam or malfunction occurs, identify the sensor that is probably responsible for the problem (see "Electrical Components" on page 4-12). 2. Enter the sensor check mode in diagnostic mode. 3. Change the state of the selected sensor and see if the signal is changed. For example: When a paper jam occurs, and you think paper exit sensor (PC8) is responsible. Check it as follows: 1. Remove the paper jam. 2. Enter the sensor check mode on the controller. 3. Use a sheet of paper to move the PC8 actuator so that PC8 is blocked. 4. Check for changes on the operator panel display for the on/off operation of the sensor. 5. If the sensor is not working correctly and the actuator is not damaged, replace the failing sensor. 6. If this does not correct the problem, replace the mechanical controller board. Diagnostic Information 2-47