Xerox M20 - WorkCentre B/W Laser, Service Manual

Page: 272 / 314

December 2006
6-66 WorkCentre M20, 4118, FaxCentre 2218 Family
GP 24, GP 25
General Procedures and Information
GP 24 ADF Test (4118)
Purpose
To give details of the ADF tests that can be performed in service mode, GP 3.
Procedure
Perform the following:
1. Enter Service Mode. Refer to GP 3.
2. Scroll to System Admin Tools/Maintenance/ADF Test.
3. Choose the relevant test:
• Motor forward test. This will run the ADF motor step, PL 5.24 Item 15 forward. Press
Enter, then Start.
• Motor backward test. This will run the ADF motor step, PL 5.24 Item 15 in reverse.
Press Enter, then Start.
• Sensor test. Press Enter.
4. To check a sensor, perform the following:
a. Choose the relevant sensor from the displayed list:
• Present sensor. This is the PBA SUB - ADF present sensor, PL 5.22 Item 16. It
is actuated by the PMO - actuator sensor present, PL 5.22 Item 23.
• Detect sensor. This is the PBA SUB - ADF detect sensor, PL 5.22 Item 17. It is
actuated by the PMO - actuator sensor detect, PL 5.22 Item 18.
• Regi sensor. It is actuated by the PMO - actuator sensor registration, PL 5.22
Item 3.
NOTE: The registration sensor is mounted on the PBA SUB-ADF, PL 5.22 Item
4.
• Door sensor. This is the platen cover angle sensor. It is actuated by the PMO
sensor actuator, PL 14.11 Item 12.
NOTE: The platen cover angle sensor is mounted on the PBA SUB - D SUB,
PL 14.11 Item 5.
b. The current state of the sensor will be displayed. Actuate the sensor, then press the
Right key or the Left key. If the sensor is good, the displayed state will change.
NOTE: An arrow is displayed to the left of the sensor names. The arrow is used to
indicate in which direction the list can be scrolled. The sensor test will not work if the
arrow is displayed alongside the sensor to be tested.
GP 25 DADF Diagnostic (2218)
Purpose
To give details of the DADF tests that can be performed.
Procedure
Perform the following:
1. Press Menu/Exit, #, 1, 9, 3, 2 in sequence. The LCD will display DADF EDC (DADF Diag-
nostic).
2. Press Enter.
3. Use the left and right keys to scroll through the available tests, refer to Figure 1. The fol-
lowing tests are available:
• Clutch Test
• Motor Test
• Sensor Test
NOTE: The DADF diagnostics will time out after 15 seconds of inactivity.
Clutch Test
To check a clutch, perform the following:
1. Select Clutch Test from the DADF diagnostic menu. Press Enter.
2. Use the up and down keys to choose the relevant clutch from the displayed list:
• Pickup clutch. This is the MEC - clutch small (feed), PL 5.13 Item 15.
• Regi clutch. This is the MEC - clutch small (registration), PL 5.11 Item 14.
• Duplex clutch. This is the MEC - clutch small (duplex), PL 5.12 Item 18.
3. Press Enter. The clutch will be energised.
4. Press the stop key to de-energise the clutch.
Motor Test
To check a motor, perform the following:
1. Select Motor Test from the DADF diagnostic menu. Press Enter.
2. Use the left and right keys to choose the relevant motor from the displayed list:
• Scan motor. This is the motor step - DADF, PL 5.11 Item 15.
• Duplex CW. This is the motor step - duplex, PL 5.11 Item 26. The motor will run for-
ward.
• Duplex CWW. This is the motor step - duplex, PL 5.11 Item 26. The motor will run in
reverse.
3. Press Enter. Use the left and right keys to choose the motor speed.
4. Press Enter. Use the left and right keys to choose the motor step size.
5. Press Enter. The motor will run.
6. Press the stop key to stop the motor.
Sensor Test
To check a sensor, perform the following:
1. Actuate the relevant sensor: