Dell 5230dn Mono Laser Printer Service Manual - Page 394

System card assembly removal WARNING: When replacing any of the following components: • Operator panel assembly (5230n/dn, 5350dn, and 5530dn) • NVM card assembly (T656 only) • System card assembly (All models) 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. CAUTION This product contains a lithium battery. THERE IS A RISK OF EXPLOSION IF THE BATTERY IS REPLACED BY AN INCORRECT TYPE. Discard used batteries according to the battery manufacturer's instructions and local regulations. 1. Remove the side cover, left. Go to "Side cover, right removal (5230n/dn)" on page 4-67 or "Side cover, left removal (5350dn, 5530dn, and T656)" on page 4-67. 2. Remove the six screws (A) securing the metal shield to the machine. A 3. Slide the metal shield in the direction of the arrow. 4-76 Service Manual