Sensor Test (Duplex); Motor Test (Duplex) - Lexmark X642e Service Manual

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Sensor Test (duplex)

This test is used to determine whether or not the duplex sensors and switches are working correctly. The test
allows you to actuate the duplex input sensor located in the back part of the duplex unit and the duplex exit
sensor located in the return paper path.
1.
Select Sensor Test from DUPLEX TESTS.
The message Sensor Test Testing displays.
2.
Manually actuate each of the duplex sensors. When the sensor/switch is closed, CL (closed) displays, and
when the sensor/switch is open, OP (open) displays.
•
Duplex input sensor
•
Duplex exit sensor
3.
Press Stop (

Motor Test (duplex)

This test lets you test the duplex option paper feed drive system, and verify that the power and velocity values
are acceptable. The duplex runs the DC motor at high speed and low speed, taking an average of the power
(PWM) required for each speed and calculating the KE value.
To run the Motor Test (duplex):
1.
Select Motor Test from DUPLEX TESTS.
The power indicator light blinks, and the message Motor Test Testing displays.
2.
When the motor stops, the results are displayed.
DUPLEX MOTOR AA BB CC DD EE FF
•
AA—00 indicates success, and any other value indicates failure.
•
BB—average PWM for the high speed portion of the test. The results should be in the range of 20
through 3F inclusively (hex)
•
CC—average PWM for the low speed portion of the test The results should be in the range of 3A
through 5D inclusively (hex)
•
DD—minimum PWM for the low speed portion of the test. The results should be 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 DC motor, and run the motor test again. For the duplex DC
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)
3.
Touch Back or press Stop (
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Service Manual
)
to exit the test.
) to exit the test.