Dell Latitude 7220 Service Manual Download

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Working on your tablet

Safety instructions

Prerequisites

Use the following safety guidelines to protect your tablet from potential damage and to ensure your personal safety. Unless otherwise
noted, each procedure in this document assumes that the following conditions exist:

•

You have read the safety information that shipped with your tablet.

•

A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.

About this task

NOTE:

Disconnect all power sources before opening the tablet. After you finish working inside your tablet, replace all

the components and screws before connection the power source.

WARNING:

Before working inside your tablet, read the safety information that shipped with your tablet. For more safety

practices information, see the

Regulatory Compliance Homepage

CAUTION:

Many repairs may only be done by a certified service technician. You should only perform troubleshooting and

simple repairs as authorized in your product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow
the safety instructions that came with the product.

CAUTION:

To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching

an unpainted metal surface simultaneously as touching a connector on the back of the tablet.

CAUTION:

Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by

its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.

CAUTION:

When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables

have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you
disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also,
before you connect a cable, ensure that both connectors are correctly oriented and aligned.

NOTE:

The color of your tablet and certain components may appear differently than shown in this document.

Before working inside your tablet

About this task

To avoid damaging your tablet, perform the following steps before you begin working inside the tablet:

Steps

1. Ensure that you follow the

Safety Instruction

2. Ensure that your work surface is flat and clean to prevent the tablet cover from being scratched.
3. Turn off your tablet.
4. If the tablet is connected to a docking device (docked) such as the mobile keyboard or a docking station, undock it.
5. Disconnect your tablet and all attached devices from their electrical outlets.
6. Press and hold the power button while the tablet is unplugged to ground the system board.

Working on your tablet