Diagnostic information 2-77950.00 through 950.29 EPROM mismatch failureWarning: When replacing any one of the following components:• Operator panel assembly (or upper front cover)• System board assembly• Interconnect card assemblyOnly replace one component at a time. Replace the required component and perform a POR before replacing asecond component listed above. If this procedure is not followed, the printer will be rendered inoperable. Neverreplace two or more of the component s listed above without a POR after inst alling each one or the printer will berendered inoperable.Warning: Never install and remove components listed above as a method of troubleshooting components.Once a component has been installed in a printer, it can not be used in another printer. It must bereturned to the manufacturer.This error code indicates a mismatch between the operator panel board and the interconnect card.FRU Action1 Interconnect card If the interconnect card been recently replaced, go to step 3. If thecard has not been replaced go to step 2.2 operator panel board If the operator panel board has been recently replaced, go to step 4.If the operator panel board has not been replaced, contact your nextlevel of support.3 Interconnect card Replace the current interconnect card assembly with the originalinterconnect card assembly. See “Interconnect card assemblyremoval” on page 4-54.If the error remains, go to step 5.4 operator panel board Replace the current operator panel board with the original operatorpanel board. See “Operator panel board removal” on page 4-67.If the error persists, go to step 6.5 Interconnect card Replace the original interconnect card assembly with a new and notpreviously installed interconnect card assembly. If the error remains,contact your next level of support.6 Operator panel Replace the original operator panel board with a new and notpreviously installed interconnect card assembly. If the error remains,contact your next level of support.
