Lexmark X746de - System Board Removal

Repair information 4-157
7526
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System board removal
See the system board part number for the model you need on page 7-9.
Warning: This part might contain customer confidential information. See “Data Security Notice” on page 4-1
for more details. After removing this part, return it to your next level of support so any data can be
removed. If the customer requests to keep the part, they must sign a confirmation of memory device
retention form.
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 4-24.
2. Remove the rear frame cover. See “Rear frame cover removal” on page 4-37.
3. Remove the hard disk if one is installed. See “Hard drive assembly removal” on page 4-108.
4. Remove the wireless network card if one is installed. See “Wireless network card removal” on
page 4-206.
5. Remove the fax modem if one is installed. See “Fax modem removal” on page 4-91.
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)
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.