Lexmark X658DFE Service Manual - Page 196

7462 2 Check the sensor (ADF 2nd scan) for proper operation. 1. Enter the diagnostic mode The sensor is Go to step 3. working properly. 2. Select Scanner tests 3. Select Sensor tests 4. Observe the line item "ADF 2nd scan" 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 (ADF 2nd scan). Replace the connection. Go to "Sensor (ADF 2nd scan) removal (models X651, X652, X654, X656, and X658)" on page 4-78. 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. Go to step 3. Go to step 2. Was the operator panel assembly recently replaced? 2 Check the system card assembly. Was the system card assembly recently replaced? Go to step 4. Contact next level of support. 3 Replace the current operator panel assembly with the original operator panel assembly. Go to step 5. Problem solved. Does the error remain? 4 Replace the current system card assembly with the original Go to step 6. system card assembly. Problem solved. Go to "System card assembly removal (X651, X652, X654, X656, and X658)" on page 4-51. 5 If problem continues, replace the original operator panel Contact the next Problem solved. assembly with a new and not previously installed operator level of support. panel assembly. Does the error continue? 6 If the problem continues, replace the original panel Contact the next Problem solved. assembly with a new ann not previously installed operator level of support. panel door assembly or the operator panel assembly. Go to "Operator panel door assembly removal (models X651, X652, X654, and X656)" on page 4-108. Go to "Operator panel assembly removal (model X658)" on page 4-106. 2-162 Service Manual