Lexmark X658DFE Service Manual - Page 144

7462 Error code or message 950.xx Error contents NVRAM mismatch failure 951.xx NVRAM failure 952.xx NVRAM failure 953.xx NVRAM failure 954.xx NVRAM failure Description/Action Possible repair actions Mismatch between system card EEPROM and operator panel mirror. ".xx" codes: 00-29: mismatch between system and mirror 30-60: mismatch between secure and system The secure NVRAM on the system card has failed. ".yy" codes: 00: error detected in zkernal 01: error detected in NV2 02: error during initialization in zkernal trying to blow CMA fuse A recoverable MVRAM Cyclic Redundancy Check (CRC) error occurred. The NVRAM chip has failed on the operator panel door assembly. NVRAM chip failure with system card assembly. 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. Never install and remove components listed above as a method of troubleshooting components. Once a component has been installed in a machine, it can not be used in another machine. It must be returned to the manufacturer. Go to NVRAM mismatch failure service check. See "NVRAM mismatch failure (950.00 through 950.29) service check" on page 2-162. Replace the system card assembly. Go to "System card assembly removal (X651, X652, X654, X656, and X658)" on page 4-51. Power the machine off/on to reset the error condition. Replace the operator panel door assembly. Go to "Operator panel door assembly removal (T650, T652, T654)" on page 4-38 Replace the system card assembly. Go to "System card assembly removal (X651, X652, X654, X656, and X658)" on page 4-51. 2-110 Service Manual