Lexmark X734DE - System Board Removal

Repair information 4-165
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System board removal
See the system board part number for the model you need on page 7-9.
Warning: When replacing any one of the following components:
• Scanner MDC card
• System board
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 ribbon cables when removing the system board.
1. Remove the left cover. See “Left cover removal” on page 4-23.
2. Remove the rear frame cover. See “Rear frame cover removal” on page 4-40.
3. Remove the hard disk if one is installed. See “Hard drive assembly removal” on page 4-118.
4. Remove the wireless network card if one is installed. See “Wireless network card removal” on
page 4-226.
5. Remove the fax modem if one is installed. See “Fax modem removal” on page 4-102.
6. Remove all the screws (A) from the left side of the printer so you can remove the system board, including:
• USB port connector (1 screw)
• Ethernet port connector (1 screws)
• Modem shield (1 screws)
• Hard disk shield (2 screws)
• Ground screw (1 screw)
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.