Lexmark T650 Service Manual - Page 165
T650, T652
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4062 Step Check Yes No 12 Perform a print test and check the duplex drive motor assembly for proper operation. Does the above component operate properly? Go to step 17. Replace the duplex drive motor assembly. Go to "Duplex drive motor assembly removal (T652, T654)" on page 4-19. 13 Check media origination. Go to step 14. Go to step 16. Did the media originate from the external duplex? 14 Check the sensor (duplex input) for proper operation. 1. Enter the diagnostic mode 2. Select Duplex tests Go to step 15. Replace the external duplex assembly. 3. Select sensor test 3. Observe the line item "input" Does the display on the operator panel, change every time the sensing area of the above sensor is interrupted or blocked. 15 Check the sensor (duplex exit) for proper operation. 1. Enter the diagnostic mode 2. Select Duplex tests Go to step 17. Replace the external duplex assembly. 3. Select sensor test 3. Observe the line item "exist" Does the display on the operator panel, change every time the sensing area of the above sensor is interrupted or blocked. 16 Check the two pick roll assemblies in the media tray being Go to step 17. picked from. Are the above components free of excess wear and contamination? Clean or replace the pick roll assembly. Go to "Pick roll assembly removal (T650, T652, T654)" on page 4-57 17 Check the aligner assembly for obstructions. Is the above component free from obstructions? Go to step 18. Remove obstructions. 18 Check the sensor (input) for proper operation. 1. Enter the diagnostic mode 2. Select Base sensor test The sensor is working properly. Go to step 20. Go to step 19. 3. Observe the line item "input" Does the display on the operator panel, change every time the sensing area of the above sensor is interrupted or blocked. 19 Check the above sensor for proper connection. Is the above sensor connected properly? Replace the Sensor (input). Go to "Sensor (input) removal (T650, T652, T654)" on page 4-71. Replace the connection. Diagnostic information 2-131