Lenovo 183822U, 183825U manual Removing and replacing a FRU, Before servicing the ThinkPad Tablet

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Chapter 7. Removing and replacing a FRU

External CRU statement to customers:

Some problems with your product can be resolved 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; you may request that Lenovo installs an Optional-service CRU according to the warranty service for your product. Where you are 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 may find a list of CRUs in the publications that ship with your product or at http://www.lenovo.com/CRUs. You may be required to return the defective part that is replaced by the 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 may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.

This chapter presents directions and drawings for use in removing and replacing a FRU. Be sure to observe the following general rules:

1.Do not try to service any tablet unless you have been trained and certified. An untrained person runs the risk of damaging parts.

2.Before replacing any FRU, review Chapter 6 “FRU replacement notices” on page 33.

3.Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs are listed at the top of each FRU replacement page. Remove them in the order in which they are listed.

4.Follow the correct sequence in the steps for removing a FRU, as given in the drawings by the numbers in square callouts.

5.When turning a screw to replace a FRU, turn it in the direction as given by the arrow in the drawing.

6.When removing a FRU, move it in the direction as given by the arrow in the drawing.

7.To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to replacement. For information about connecting and arranging internal cables, see Chapter 8 “Locating the controls and hardware components” on page 49.

8.When replacing a FRU, use the correct screw(s) as shown in the procedures.

DANGER

Before removing any FRU, turn off the tablet, disconnect all power supplies, remove the internal battery, and then disconnect any interconnecting cable.

Attention: After replacing a FRU, do not turn on the tablet until you have made sure that all screws, springs, and other small parts are in place and none are loose inside the tablet. Verify this by shaking the tablet gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge. Before touching it, establish personal grounding by touching a ground point with one hand or by using an electrostatic discharge (ESD) strap (P/N 6405959).

Before servicing the ThinkPad Tablet

Some models of the ThinkPad Tablet you are servicing might have the SIM card that the customer has installed.

If the tablet you are servicing has the SIM card, remove it before you start the servicing.

© Copyright Lenovo 2011

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Contents ThinkPad Tablet Hardware Maintenance ManualFirst Edition August Copyright Lenovo Contents Ii Hardware Maintenance Manual About this manual Iv Hardware Maintenance Manual Electrical safety Safety informationGeneral safety Hardware Maintenance Manual Safety inspection guide Grounding requirements Safety notices multilingual translationsSafety information Hardware Maintenance Manual Perigo Perigo Safety information Vorsicht Vorsicht Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Before replacing parts Important service informationStrategy for replacing FRUs Important notice for replacing a system boardUsing PEW Dynamic Configure To Order CTOFRU identification for CTO, CMV, and GAV products Custom Model Variant CMVImportant service information Hardware Maintenance Manual General checkout Following are not covered under warrantyWhat to do first Be careful not to replace a non-defective FRUChecking the internal battery condition Power system checkoutChecking the internal battery Checking the ThinkPad Tablet AC Charger Checking the internal battery statusHardware Maintenance Manual Resetting a tablet preload to the factory condition Related service informationTouch Factory data reset Locking the screenTouch Location & Security Configure lock screen Changing the password, PIN, or patternEnabling the screen unlock function Touch the Screen lock sounds iconDisabling the screen lock function Power managementScreen blank mode Touch Wireless & network Wi-Fi settings Wireless network disconnect policyHot key Description Hardware Maintenance Manual Screw notices FRU replacement noticesExternal CRU statement to customers Plastic to plasticRetaining serial numbers, MTM, UUID, and Asset ID Before servicing the ThinkPad Tablet Removing and replacing a FRURemoval steps of ThinkPad Tablet Pen ThinkPad Tablet PenThinkPad Tablet Pen on M2 × 4 mm, flat-head, nylon-coated Silver 181 Nm Kgfcm Step Screw quantity Color Torque Speaker assembly Removal steps of PCI Express Mini Card for wireless WAN PCI Express Mini Card for wireless WANRemoval steps of speaker assembly M2 × 3 mm, flat-head, nylon-coated Black 181 Nm Step Screw quantity Color Torque Removal steps of LCD module assembly LCD module assemblyRemoval steps of microphone assembly Microphone assemblyRemoval steps of system board and base cover System board, base cover, and LCD cableApplying labels to the base cover Removal steps of LCD cable Locating the controls and hardware components Hardware Maintenance Manual External CRU statement to customers Parts listOverall FRU FRU ThinkPad Tablet Keyboard Folio Case CRU ID Miscellaneous partsThinkPad Tablet AC Charger ThinkPad Tablet AC ChargerMicro-USB cable ThinkPad Tablet Dock power cord cableTool Common service toolsTrademarks Electronic emission noticesPage 0A96158
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