Lenovo ThinkPad X390, Hardware Maintenance Manual, Page: 88 / 108

When installing: Ensure that all the connectors are attached firmly to the system board. If you install a new
system board, paste the thermal pad in the M.2 solid-state drive slot as shown.
After the replacement finishes, calibrate the accelerometer using the sensor calibration tool. To download the
sensor calibration tool and the instruction, do the following:
Note: Service account and password are required for downloading the sensor calibration tool and the
instruction.
1. Go to
https://support.lenovo.com/us/en/documents/HT103119
and follow the instructions on the screen.
2. Locate the sensor calibration tool and select the corresponding file name to download the sensor
calibration tool or the instruction.
1170 Keyboard assembly
For access, remove these FRUs in order:
• “1010 ThinkPad Pen Pro” on page 64
• “1020 Nano-SIM card tray (for selected models)” on page 65
• “1030 Base cover assembly” on page 65
• “1040 Battery” on page 66
• “1050 I/O bracket” on page 68
• “1060 Wireless-WAN card (for selected models)” on page 68
• “1070 M.2 solid-state drive” on page 69
• “1080 Coin-cell battery” on page 71
• “1090 Speaker assembly” on page 71
• “1100 Pen charger cable” on page 72
• “1110 Thermal fan assembly” on page 73
• “1120 NFC card, NFC cable, and NFC antenna (for selected models)” on page 75
• “1130 Smart-card reader, smart-card-reader cable, or dummy smart-card door” on page 75
• “1140 Fingerprint reader bracket, fingerprint reader cable, and fingerprint reader ” on page 77
• “1150 Trackpad and trackpad cable” on page 78
• “1160 System board” on page 79
• “1200 LCD unit” on page 83
When installing : If you install a new keyboard bezel assembly for models without a smart card reader,
ensure to install the rubbers
a
and gaskets
b
as shown.
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X390 Yoga Hardware Maintenance Manual