Lexmark X644E Service Manual - Page 73

7002-xxx Service error codes (9xx.xx) (continued) Error code Sub codes Display text 950 .30- Service NVRAM .60 mismatch Description EPROM mismatch failure 952 .00 953 .00 NV failure:n CRC error has occurred. This is recoverable. Action This error code indicates a mismatch between the System Board assembly and the interface card assembly. Warning: In the event of replacement of any one of the following components: • Flatbed interconnect card • System board assembly • Interface 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: Never install and remove components listed above as a method of troubleshooting components. Once a component has been installed in a machine, it cannot be used in another machine. It must be returned to the manufacturer. Go to"950.30 through 950.60 EPROM mismatch failure" on page 2-121. Perform POR to clear the error. Replace the operator panel right cover assembly. See "Operator panel right cover assembly removal" on page 4-64. Diagnostic information 2-35