1200 Wireless-Lan Antenna Assembly - Lenovo ThinkPad Helix 20CG Hardware Maintenance Manual

1200 Wireless-LAN antenna assembly

Before you replace the system board, do the following:
1. Disable the built-in battery. See "Disabling the built-in battery" on page 46.
2. Remove the SIM card, SD card, and smart card. See "Removing the SIM card, SD card, and smart
card" on page 46.
3. Remove the following FRUs:
• "1010 Back cover assembly, smart-card reader, and smart-card-reader cable" on page 48
• "1030 Built-in battery" on page 53
• "1040 Wireless WAN card" on page 54
• "1050 M.2 solid-state drive and solid-state-drive mylar" on page 56
• "1060 Fingerprint-reader module" on page 57
• "1100 NFC card and NFC-card cable" on page 61
• "1130 Thermal module" on page 65
• "1140 USB-connector bracket" on page 67
• "1170 System board" on page 71
Removal steps of the wireless-LAN antenna assembly
Attention: When installing the antenna assembly, route the cables as shown in the following illustration.
Ensure that the cables are not twisted or subject to any tension. Tension could cause the cables to be
damaged by cable guides.
1
1
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Chapter 7 Removing or replacing a FRU
75