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