Lexmark C520 Service Manual - Page 306

5022-xxx System card removal See the system card part number for the model you need on page 7-9. Warning: When replacing any one of the following components: • Operator panel assembly • System card • Smart chip card (C52x) or printhead assembly (C53x) 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. Warning: Be careful not to damage the printhead cable when removing the system card. 1. Remove the rear cover. See "Rear cover removal" on page 4-25. 2. Disconnect all the connectors from the system card. Warning: Do not use tools to remove the printhead ribbon cable (A). It can be damaged and should be removed gently by hand. When installing, carefully line up the cable, and press straight into the connector. Repair information 4-79