Lexmark T652 Service Manual - Page 162

4062 Step Check Check the above sensor for proper connection. Is the above sensor connected properly? Yes Replace the duplex input sensor assembly (internal duplex only). Go to "Duplex input sensor assembly removal (T652, T654)" on page 4-20 or replace the external duplex unit assembly (external duplex only). No Replace the connection. 3 Sensor (duplex input) service check (external duplex only) Step 1 Check Check the sensor (duplex input) for damage. Is the above component free from damage? Yes Go to step 2. No Replace the external duplex unit assembly. Go to step 2. 2 1. Enter the diagnostic mode 2. Select Duplex sensor 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. The sensor is working properly 3 Check the above sensor for proper connection. Is the above sensor connected properly? Replace the external duplex unit assembly. Replace the connection. Sensor (duplex exit) service check (external duplex only) Step 1 Check Check the sensor (duplex exit) for damage. Is the above component free from damage? Yes Go to step 2. No Replace the external duplex unit assembly. Go to step 2. 2 1. Enter the diagnostic mode 2. Select Duplex sensor tests 3. Select Sensor test 4. Observe the line item "exit" Does the display on the operator panel, change every time the sensing area of the above sensor is interrupted or blocked. The sensor is working properly 3 Check the above sensor for proper connection. Is the above sensor connected properly? Replace the external duplex unit assembly. Replace the connection. 2-128 Service Manual