Hardware Maintenance Manual
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...30 Checking the ac power adapter 30 Checking operational charging 31 Checking the battery pack 31 Chapter 4. Lenovo B490 37 Specifications 37 Status indicators 38 Fn key combinations 39 Chapter 6. Notices 93 Electronic emissions notices 94 Trademarks 94 © Copyright... Lenovo 2012 i Contents About this manual iii Chapter 1. Important service information 27 Strategy for replacing FRUs 27 Strategy for replacing a hard...
...30 Checking the ac power adapter 30 Checking operational charging 31 Checking the battery pack 31 Chapter 4. Lenovo B490 37 Specifications 37 Status indicators 38 Fn key combinations 39 Chapter 6. Notices 93 Electronic emissions notices 94 Trademarks 94 © Copyright... Lenovo 2012 i Contents About this manual iii Chapter 1. Important service information 27 Strategy for replacing FRUs 27 Strategy for replacing a hard...
Hardware Maintenance Manual
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...The common sections provide general information, guidelines, and safety information required for the following Lenovo® products. Machine Lenovo B490 Machine type (MT) 3756, 3772, 20205, 20207 Use this manual to read ...all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 27. © Copyright Lenovo 2012 iii About this manual This manual provides service and reference information for servicing computers. • The product-specific...
...The common sections provide general information, guidelines, and safety information required for the following Lenovo® products. Machine Lenovo B490 Machine type (MT) 3756, 3772, 20205, 20207 Use this manual to read ...all the information under Chapter 1 "Safety information" on page 1 and Chapter 2 "Important service information" on page 27. © Copyright Lenovo 2012 iii About this manual This manual provides service and reference information for servicing computers. • The product-specific...
Hardware Maintenance Manual
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...) have not been removed or tampered with the power off power. - Notes: 1. Chapter 1. Safety information 3 Checklist: 1. c. Use product-specific ESD procedures when they present: • Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal electrical shock) ...face or a bulging capacitor • Mechanical hazards, such as metal filings, contamination, water or other liquids, or signs of non-Lenovo features or options not covered by equalizing the charge so that the machine, the part, the work mat, and the person handling...
...) have not been removed or tampered with the power off power. - Notes: 1. Chapter 1. Safety information 3 Checklist: 1. c. Use product-specific ESD procedures when they present: • Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal electrical shock) ...face or a bulging capacitor • Mechanical hazards, such as metal filings, contamination, water or other liquids, or signs of non-Lenovo features or options not covered by equalizing the charge so that the machine, the part, the work mat, and the person handling...
Hardware Maintenance Manual
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... a wrist strap. • Use a grounded work surface. Note: The use have been certified (ISO 9000) as those listed below, to provide protection that meets the specific service requirement. Grounding requirements Electrical grounding of the ac plug on your body. • Prevent the part from touching your skin to any frame ground...
... a wrist strap. • Use a grounded work surface. Note: The use have been certified (ISO 9000) as those listed below, to provide protection that meets the specific service requirement. Grounding requirements Electrical grounding of the ac plug on your body. • Prevent the part from touching your skin to any frame ground...
Hardware Maintenance Manual
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... only) Display • Size: 14.0 inches (356 mm) • Resolution: - Lenovo B490 This chapter presents the following product-specific service references and parts information: • "Specifications" on page 37 • "Status indicators" on page 38 • "Fn key combinations" on some models for the Lenovo B490 models. External monitor: Maximum 2048-by -768 - Chapter 5. then click...
... only) Display • Size: 14.0 inches (356 mm) • Resolution: - Lenovo B490 This chapter presents the following product-specific service references and parts information: • "Specifications" on page 37 • "Status indicators" on page 38 • "Fn key combinations" on some models for the Lenovo B490 models. External monitor: Maximum 2048-by -768 - Chapter 5. then click...
Hardware Maintenance Manual
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If you use new screws for each step. • Make sure that 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. 42 Hardware Maintenance Manual It is recommended to use the correct screw. • Torque driver If you have a torque screwdriver, refer to the Torque column in the screw information table for replacements.
If you use new screws for each step. • Make sure that 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. 42 Hardware Maintenance Manual It is recommended to use the correct screw. • Torque driver If you have a torque screwdriver, refer to the Torque column in the screw information table for replacements.
Hardware Maintenance Manual
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... are held by more than two screws. Lenovo computers contain the following lists of this Hardware Maintenance Manual. Self-service CRUs: These CRUs unplug or are available from Lenovo at http://www.lenovo.com/UserManuals. Once the access panel is removed, the specific CRU is not a CRU. An N ...in the CRU ID column means that the part is visible. © Copyright Lenovo 2012 79 and (2) you can request that a...
... are held by more than two screws. Lenovo computers contain the following lists of this Hardware Maintenance Manual. Self-service CRUs: These CRUs unplug or are available from Lenovo at http://www.lenovo.com/UserManuals. Once the access panel is removed, the specific CRU is not a CRU. An N ...in the CRU ID column means that the part is visible. © Copyright Lenovo 2012 79 and (2) you can request that a...
Hardware Maintenance Manual
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...in all countries. You can send license inquiries, in new editions of express or implied warranties in specific environments and is presented as an illustration. Attention: Lenovo Director of this document in other life support applications where malfunction may not offer the products, services,... or features discussed in this document should verify the applicable data for their specific environment. © Copyright Lenovo 2012 93 these changes will be used instead. The result obtained in a controlled environment. The materials at any ...
...in all countries. You can send license inquiries, in new editions of express or implied warranties in specific environments and is presented as an illustration. Attention: Lenovo Director of this document in other life support applications where malfunction may not offer the products, services,... or features discussed in this document should verify the applicable data for their specific environment. © Copyright Lenovo 2012 93 these changes will be used instead. The result obtained in a controlled environment. The materials at any ...