Lenovo ThinkPad Helix 20CG Hardware Maintenance Manual page 61

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 back cover assembly. See "1010 Back cover assembly, smart-card reader, and
smart-card-reader cable" on page 48.
4. Disconnect the cable of the built-in battery.
Removal steps of the wireless WAN card
The wireless WAN card is only available on some models.
Use the antenna-RF-connector removal tool to disconnect the cables or use your fingers to pick up
the cables slightly.
When installing: Plug the red cable into the main connector, and the blue cable into the auxiliary connector
on the card. Ensure that the connectors are attached firmly.
Step Screw (quantity)
2
M2 × 2 mm, flat-head, nylon-coated (1)
1
1
Torque
Color
Silver 0.196 Nm
(2 kgf-cm)
.
Chapter 7 Removing or replacing a FRU
55