Lexmark T522 Service Manual - Page 140

4520-xxx Duplex Motor Test This test lets you test the duplex unit paper feed drive system, and verify that the power and velocity values are acceptable. To run the Duplex Motor Test: 1. Select Motor Test from the Duplex Tests menu. The duplex motor test continues to run until the printer is powered off. • The power indicator blinks while the test is running. • The duplex unit runs the motor at a high speed and then a low speed and takes an average of the power required for each speed. • After all the information is computed, the motor turns off. DUPLEX MOTOR AA BB CC DD EE FF appears on the printer display. To pass the test the following results must display: AA = 00 BB = in the range of 20 through 3F inclusively (hex) CC = in the range of 3A through 5D inclusively (hex) DD = in the range of 11 through 1F inclusively (hex) Ignore bytes EE and FF. If the test fails, remove the drive belt from the duplex D.C. motor and run the motor test again. For the duplex D.C. motor to pass the test the following results must display: AA = 00 BB = in the range of 29 through 3E inclusively (hex) CC = in the range of 35 through 51 inclusively (hex) DD = in the range of 0C through 13 inclusively (hex) For the duplex drive system to pass the test the following results must display: AA = 00 BB = in the range of 29 through 3F inclusively (hex) CC = in the range of 3A through 5D inclusively (hex) DD = in the range of 11 through 1F inclusively (hex) 2. Press Return/Stop to exit the test. 3-8 Service Manual