Dell 5230dn Mono Laser Printer Service Manual - Page 171

Step Check Yes No 4 Check the sensor (duplex input) for proper operation. Go to step 6. 1. Enter the diagnostic mode. 2. Select Duplex tests. 3. Select sensor test. 4. 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 5. 5 Check the above sensor for proper connection. Is the above sensor connected properly? Replace the sensor (duplex input). Go to "Sensor (duplex input) removal (5350dn, 5530dn, and T656)" on page 4-69. Replace the connection. 6 Check the aligner assembly for obstructions. Is the above component free from obstructions? Go to step 7. Remove obstructions. 7 Check the external duplex media path for obstructions. Is the above component free from obstructions? Go to step x Remove obstructions. 8 Check the external duplex unit assembly for proper installation. Is the above component properly installed? Go to step 9. Remove then properly re-install the external duplex unit assembly. 9 Check the sensor (duplex input) for proper operation. 1. Enter the diagnostic mode. 2. Select Duplex tests. 3. Select sensor test. 4. Observe the line item "input". Go to step 10. Does the display on the operator panel, change every time the sensing area of the above sensor is interrupted or blocked. 10 Perform a print test using the duplex. Does the problem remain? Contact next highest level of tech support. Replace the external duplex assembly. Problem solved. Diagnostic information 2-137