Lenovo V480, Руководство по техническому обслуживанию аппаратной части

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Chapter 6. FRU replacement notices
This chapter presents notices related to removing and replacing parts. Read this chapter carefully before
replacing any FRU.
CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called
a “Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others
are designated as optional-service CRUs.
Installation of self-service CRUs is your responsibility. For
optional-service CRUs, you can either install the CRU yourself or you can request that a Service Provider
install the CRU according to the warranty service for your product.
If you intend on installing the CRU,
Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your
product and are available from Lenovo at any time upon request. You can find a list of CRUs for your
product in this
Hardware Maintenance Manual . An electronic version of this manual can be found at
http://www.lenovo.com/UserManuals. Follow the on-screen instructions to find the manual for your product.
You might be required to return the defective CRU. When return is required: (1) return instructions, a prepaid
shipping label, and a container will be included with the replacement CRU; and (2) you might be charged for
the replacement CRU if Lenovo does not receive the defective CRU within thirty (30) days of your receipt of
the replacement CRU. See your Lenovo Limited Warranty documentation for full details.
Screw notices
Loose screws can cause a reliability problem. In the Lenovo notebook computer, this problem is addressed
with special nylon-coated screws that have the following characteristics:
• They maintain tight connections.
• They do not easily come loose, even with shock or vibration.
• They are harder to tighten.
Do the following when you service the computer:
• Keep the screw kit in your tool bag.
• It is recommended to use new screws.
• It recommended to use each screw only once.
• Use a torque screwdriver if you have one.
Tighten screws as follows:
• Plastic to plastic
Turn an additional 90 degrees after the screw head touches the surface of the plastic part.
• Logic card to plastic
Turn an additional 180 degrees after the screw head touches the surface of the logic card.
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