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Lenovo A7600
Hardware 
Maintenance
Manual 

Note:
Before using this information and the product it supports, be sure to read the general information 
under “Notices” on page 78.
First Edition (February 2014)
© Copyright Lenovo 2014. All rights reserved.
LENOVO products, data, computer software, and services have been developed exclusively at private 
expense and are sold to governmental entities as commercial items as defined by 48 C.F.R. 2.101 with 
limited and restricted rights to use, reproduction and disclosure.
LIMITED AND RESTRICTED RIGHTS...

About this manual ........................................ iv
Safety information......................................... 1
General safety ...................................................... 2
Electrical safety .................................................... 3
Safety inspection guide ...................................... 5
Handling devices that are sensitive to electro-
static discharge .................................................... 6
Grounding requirements...

iv
This manual contains service and reference information for the following 
Lenovo product:
•Lenovo A7600
Use this manual to troubleshoot problems.
The manual is divided into the following sections:
• The common sections provide general information, guidelines, and safety 
information required for servicing computers.
• The product-specific section includes service, reference, and product-specific 
parts information.
About this manual
Important:
This manual is intended only for trained servicers who are...

Safety information
1
This chapter presents the following safety information that you need to get 
familiar with before you service a Lenovo computer:
•“General safety” on page2
• “Electrical safety” on page 3
• “Safety inspection guide” on page 5
• “Handling devices that are sensitive to electrostatic discharge” on page 6
• “Grounding requirements” on page 6
• “Safety notices: multilingual translations” on page 7
• “Laser compliance statement” on page 14
Safety information 

Lenovo A7600 Hardware Maintenance Manual
2
Follow these rules below to ensure general safety:
• Observe a good housekeeping in the area where the machines are put during 
and after the maintenance.
• When lifting any heavy object:
1.Make sure that you can stand safely without slipping.
2.Distribute the weight of the object equally between your feet.
3.Use a slow lifting force. Never move suddenly or twist when you attempt 
to lift it.
4.Lift it by standing or pushing up with your leg muscles; this action...

Safety information
3
Observe the following rules when working on electrical equipments.
• Find the room emergency power-off (EPO) switch for disconnecting the 
switch or electrical outlet. If an electrical accident occurs, you can then 
operate the switch or unplug the power cord quickly.
• Do not work alone under hazardous conditions or near the equipment that 
has hazardous voltages.
• Disconnect all power before:
—Performing a mechanical inspection
—Working near power supplies
—Removing or installing...

Lenovo A7600 Hardware Maintenance Manual
4
• Always look carefully for possible hazards in your work area. Examples of 
these hazards are moist floors, nongrounded power extension cables, power 
surges, and missing safety grounds.
• Do not touch live electrical circuits with the reflective surface of a plastic 
dental mirror. The surface is conductive; such touching can cause personal 
injury and machine damage.
• Do not service the following parts with the power on when they are removed 
from their...

Safety information
5
The purpose of this inspection guide is to assist you in identifying potential 
unsafe conditions. As each machine was designed and built, required safety 
items were installed to protect users and service personnel from injury. This 
guide addresses only those items. You should use good judgment to identify 
potential safety hazards according to the attachment of non-Lenovo features or 
options not covered by this inspection guide.
If any unsafe conditions are present, you must...

Lenovo A7600 Hardware Maintenance Manual
6
Any computer part containing transistors or integrated circuits (ICs) should be 
considered sensitive to electrostatic discharge (ESD). ESD damage can occur 
when there is a difference in charge between objects. Protect against ESD damage 
by equalizing the charge so that the machine, the part, the work mat, and the 
person handling the part are all at the same charge.
When handling ESD-sensitive parts:
• Keep the parts in protective packages until they are...