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– When working on a double-insulated or battery-operated system, use an ESD common ground or
reference point. You can use coax or connector-outside shells on these systems.
– Use the round ground prong of the ac plug on ac-operated computers.
Grounding requirements
Electrical grounding of the computer is required for operator safety and correct system function. Proper
grounding of the electrical outlet can be verified by a certified electrician.
Safety notices (multilingual translations)
The safety notices in this section are provided in the following languages:
• English
• Arabic
• Brazilian Portuguese
• French
• German
• Hebrew
• Japanese
• Korean
• Spanish
• Traditional Chinese
DANGER
DANGER
DANGER
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X390 Yoga Hardware Maintenance Manual
Summary of Contents for ThinkPad X390
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Page 11: ...DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information 5 ...
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Page 13: ...PERIGO PERIGO Chapter 1 Safety information 7 ...
Page 14: ...PERIGO PERIGO PERIGO PERIGO PERIGO 8 X390 Yoga Hardware Maintenance Manual ...
Page 15: ...PERIGO DANGER DANGER DANGER DANGER Chapter 1 Safety information 9 ...
Page 16: ...DANGER DANGER DANGER DANGER VORSICHT 10 X390 Yoga Hardware Maintenance Manual ...
Page 17: ...VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information 11 ...
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Page 49: ... Copyright Lenovo 2019 43 ...
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Page 57: ...Major FRUs d a b c Chapter 6 Locations 51 ...
Page 60: ...LCD FRUs 54 X390 Yoga Hardware Maintenance Manual ...
Page 101: ... 2090 Wireless antenna kit on page 91 Chapter 8 Removing or replacing a FRU 95 ...
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Page 108: ...Part Number SP40K05260 Printed in 1P P N SP40K05260 1PSP40K05260 ...