Lenovo ZhaoYang K49 Hardware Maintenance Manual page 48

• Torque driver
If you have a torque screwdriver, refer to the Torque column in the screw information table for each step.
• Make sure that you use the correct screw. It is recommended to use new screws for replacements. If
you have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information
table for each step.
• Ensure torque screw drivers are calibrated correctly following country specifications.
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Hardware Maintenance Manual