Lexmark X644E Service Manual - Page 390

7002-xxx System board and inner shield removal-model X642e Warning: When replacing any one of the following components: • Flatbed interconnect card (ICC) • 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 printer, it cannot be used in another printer. It must be returned to the manufacturer. Warning: Observe all ESD precautions while handling ESD-sensitive parts. See "Handling ESD-sensitive parts" on page 4-1. 1. Remove the outer shield. See "Printer outer shield removal" on page 4-126. 2. Disconnect all cables from the system board. Note: Sometimes cables may be difficult to remove. Be careful not to damage the connectors. 3. Remove all features and options from the interface card. 4. Depending on your printer model, remove the small USB port mounting screw (A). Note: You may have additional screws in various models. 5. Depending on your printer model, remove the modem. See "Modem removal" on page 4-115. 6. Remove the six system board mounting screws (B). Back view Side view A B 7. Remove the system board and inner shield. 4-130 Service Manual