Lenovo N 500 Service Manual

Lenovo 3000 N500 
Hardware Maintenance Manual 
   
 
 
            

Lenovo 3000 N500 
Hardware Maintenance Manual 
   
 
 
    

Note Before using this information and the product it supports, be sure to read the general information under “Notices” on page 113.
Second Edition (May 2009) 
© Copyright Lenovo 2008, 2009. 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...

Contents 
About this manual   . . . . . . . . . .v 
Safety information 
 . . . . . . . . . .1 
General safety 
 . . . . . . . . . . . . . .2 
Electrical safety 
 . . . . . . . . . . . . .3 
Safety inspection guide 
 . . . . . . . . . . .5 
Handling devices that are sensitive to electrostatic 
discharge 
 . . . . . . . . . . . . . . .6 
Grounding requirements 
 . . . . . . . . . .6 
Safety notices: multilingual translations 
 . . . . .7 
Laser compliance statement 
 . . . . . . . . .14 
Important service...

iv Lenovo 3000 N500 Hardware Maintenance Manual 

About this manual 
This manual contains service and reference information for the following Lenovo 
3000 products. 
Lenovo 3000 N500 
MT 4233
 Use this manual along with the advanced diagnostic tests to troubleshoot 
problems. 
The manual is divided into sections as follows: 
v   
 The common sections provide general information, guidelines, and safety 
information required in servicing computers. 
v 
 
 The product-specific section includes service, reference, and product-specific 
parts information....

vi Lenovo 3000 N500 Hardware Maintenance Manual 

Safety information 
This chapter presents following safety information that you need to be familiar 
with before you service a Lenovo 3000 computer. 
v   
 “General safety” on page 2 
v 
 
 “Electrical safety” on page 3 
v 
 
 “Safety inspection guide” on page 5 
v 
 
 “Handling devices that are sensitive to electrostatic discharge” on page 6 
v 
 
 “Grounding requirements” on page 6 
v 
 
 “Safety notices: multilingual translations” on page 7 
v 
 
 “Laser compliance statement” on page 14
 
 
©...

General safety 
Follow these rules to ensure general safety: 
v   
 Observe good housekeeping in the area of the machines during and after 
maintenance. 
v 
 
 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. 
4. 
 
 Lift by standing or by pushing up with your leg muscles; this action removes 
the...