Lexmark T650 Service Manual - Page 189
Sensor (toner empty) service check, NVRAM mismatch failure (950.00 through 950.29) service check
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4062 Step Check 3 Check the above sensor for proper connection. Is the above sensor connected properly? 4 Perform a print test using the output option. Does the error continue? Sensor (toner empty) service check Yes No Replace the sensor (mailbox empty). Go to "5-bin mailbox sensor (media bin empty) removal" on page 4-91. Replace the output option. Replace the connection. Problem solved. Step Check Yes No 1 Check the sensor (toner empty) for proper installation. Is the above component properly installed? go to step 2. Reinstall the sensor (toner empty) 2 Check the sensor (toner empty) for proper operation. 1. Enter the diagnostic mode The sensor is Go to step 3. working properly. 2. Select Base sensor test 3. Observe the line item "toner" Does the display on the operator panel, change every time the sensing area of the above sensor is interrupted or blocked? 3 Check the above sensor for proper connection. Is the above sensor connected properly? Replace the sensor (toner empty). Replace the connection. Go to "Sensor (toner empty) removal (T650, T652, T654)" on page 4-71. NVRAM mismatch failure (950.00 through 950.29) service check Warning: When replacing any of the following components: • Operator panel assembly • System card assembly Only replace one component at a time. replace the required component and perform a POR before replacing a second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never replace two or more of the components listed above without a POR after installing each one or the printer will be rendered inoperable. Warning: These components can be used as a method of troubleshooting as long as the machine is booted into diagnostic mode or is operating in diagnostic mode. Once a component has been installed in a machine and powered up into user mode, it cannot be used in another machine. It must be returned to the manufacturer. Step Check Yes No 1 Check the operator panel assembly. Was the operator panel assembly recently replaced? Go to step 3. Go to step 2. Diagnostic information 2-155