Lenovo B305 Service Manual

							Contents
      i
Contents
Chapter 1. About this manual ................................................1
Important Safety Information ...................................................................... 1
Important information about replacing RoHS compliant FRUs  ..2
Chapter 2. Safety information  ................................................4
General safety ........................................................................\
............................... 4
Electrical safety  ........................................................................\
............................ 5
Safety inspection guide  ........................................................................\
........... 7
Handling electrostatic discharge-sensitive devices   .........................8
Grounding requirements   ........................................................................\
....... 8
Safety notices  ........................................................................\
................................ 9
Chapter 3. General information ...........................................12
Specifications ........................................................................\
............................. 12
Chapter 4. General Checkout ...............................................13
Problem determination tips   ...................................................................... 14
Chapter 5. Using the Setup Utility  ......................................15
Starting the Setup Utility program  .........................................................15
Viewing and changing settings  ................................................................15
Using passwords  ........................................................................\
...................... 16
Using Device  ........................................................................\
.............................. 18
Selecting a startup device  ........................................................................\
... 19
Exiting from the Setup Utility program  ................................................20
Chapter 6. Symptom-to-FRU Index .....................................21
Hard disk drive boot error  ........................................................................\
... 21 
						

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Power Supply Problems ........................................................................\
........ 22
POST error codes  ........................................................................\
..................... 22
Undetermined problems  ........................................................................\
..... 24
Chapter 7. Locations ............................................................... 25
Locating components and connectors  .................................................25
Chapter 8. Replacing hardware  ...........................................29
General information ........................................................................\
............... 29
Removing the computer stand  ................................................................. 30
Replacing a memory module  .................................................................... 32
Replacing the optical disk drive
   ................................................................................... 34Removing the computer cover ................................................................. 36
Replacing the hard disk drive  .................................................................... 37
Replacing the bluetooth module  ............................................................39
Removing the motherboard cover  .........................................................40
Replacing the heatsink  ........................................................................\
.......... 41
Replacing the system fan  ........................................................................\
..... 42
Replacing the microprocessor  .................................................................. 43
Replacing the function panel  .................................................................... 44
Replacing the WLAN card card  .................................................................. 45
Replacing the speakers system  ................................................................. 46
Removing the inverter board  .................................................................... 47
Replacing the TV tuner card  ....................................................................... 49
Removing the TV antenna connector ....................................................50
Replacing the motherboard  ....................................................................... 50
Removing the shell  ........................................................................\
................. 51
Replacing the camera  ........................................................................\
............ 52
Replacing the touch module  ..................................................................... 53
Replacing the LED panel  ........................................................................\
...... 54
Replacing the keyboard   ........................................................................\
...... 57
Replacing the mouse  ........................................................................\
............. 58
Replacing the power cord or power adapter  .....................................59
Chapter 9. Additional Servic e Information .......................60
Power management   ........................................................................\
.............. 60
Appendix. Statement ............................................................. 61 
						

							Chapter 1. About this manual
      1
About this manual
1
This manual contains service and reference information for Lenovo 
IdeaCentre B3 computers listed on the cover. It is intended only for trained 
servicers who are familiar with Lenovo computer products.
Before servicing a Lenovo product, be sure to read the Safety Information.
The description of the TV card in this manual is only used for the machines 
which have the TV card. It is invalid for those machines which do not have 
TV card.
Important Safety Information
Be sure to read all caution and danger statements in this book before 
performing any of the instructions.
Veuillez lire toutes les consignes de type DANGER et ATTENTION du 
présent document avant d’exécuter les instructions.
Lesen Sie unbedingt alle Hinweise vom Typ “ACHTUNG” oder “VORSICHT” 
in dieser Dokumentation, bevor Sie irgendwelche Vorgänge durchführen
Leggere le istruzioni introdotte da ATTENZIONE e PERICOLO presenti nel 
manuale prima di eseguire una qualsiasi delle istruzioni
Certifique-se de ler todas as instruções de cuidado e perigo neste manual 
antes de executar qualquer uma das instruções
Es importante que lea todas las declaraciones de precaución y de peligro 
de este manual antes de seguir las instrucciones.
执行任何说明之前，请确保已阅读本书中的所有警告和危险声明。 
						

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Important information about replacing RoHS compliant FRUs
RoHS, The Restriction of Hazardous Substances in Electrical and 
Electronic Equipment Directive (2002/95/EC) is a European Union 
legal requirement affecting the global electronics industry. RoHS 
requirements must be implemented on Lenovo products placed on the 
market after June 2006. Products on the market before June 2006 are 
not required to have RoHS compliant parts.
So, if the parts are not compliant originally, replacement parts can 
also be noncompliant, but in all cases, if the parts are compliant, the 
replacement parts must also be compliant.
Lenovo plans to transition to RoHS compliance well before the 
implementation date and expects its suppliers to be ready to support 
Lenovo’s requirements and schedule. Products sold in 2005, will contain 
some RoHS compliant FRUs. The following statement pertains to these 
products and any product Lenovo produces containing RoHS compliant 
parts.
RoHS compliant Lenovo IdeaCentre B3 parts have unique FRU part 
numbers. Before or after June, 2006, failed RoHS compliant parts must 
always be replaced using RoHS compliant FRUs, so only the FRUs 
identified as compliant in the system HMM or direct substitutions for 
those FRUs can be used.
Products marketed before June 2006Products marketed after June 2006
Current or 
original part Replacement 
FRUCurrent or 
original partReplacement 
FRU
Non-RoHS Can be Non-RoHSMust be RoHSMust be RoHS
Non-RoHS Can be RoHS
Non-RoHS Can sub to RoHS
RoHS Must be RoHS
Note:  A direct substitution is a part with a different FRU part number that 
is automatically shipped by the distribution center at the time of 
order.
Related Web URLs are: Lenovo information for Suppliers website: 
• 
http://www-03.ibm.com/procurement/proweb.nsf/
ContentDocsByTitle/United+States~Information+for+suppliers
RoHS Directive: 
• 
http://europa.eu.int/eur-lex/pri/en/oj/dat/2003/l_037/
l_03720030213en00190023.pdf 
						

							Chapter 1. About this manual
      3
California Senate Bills 20, 50: 
• 
http://www.ciwmb.ca.gov/HHW/Events/AnnualConf/2004/
presentation/MPaparian.pdf 
						

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Safety information
2
This chapter contains the safety information that you need to be familiar 
with before servicing a computer.
General safety
Follow these rules to ensure general safety: Observe good housekeeping in the area of the machines during and 
• 
after maintenance. 
When lifting any heavy object: 
• 
1.  Ensure 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 strain from the muscles in your back. Do not attempt to 
lift any objects that weigh more than 16 kg (35 lb) or objects that you 
think are too heavy for you.
Do not perform any action that causes hazards to the customer, or that 
• 
makes the equipment unsafe. 
Before you start the machine, ensure that other service representatives 
• 
and the customer’s personnel are not in a hazardous position. 
Place removed covers and other parts in a safe place, away from all 
• 
personnel, while you are servicing the machine. 
Keep your tool case away from walk areas so that other people will not 
• 
trip over it.
Do not wear loose clothing that can be trapped in the moving parts of a 
• 
machine. Ensure that your sleeves are fastened or rolled up above your 
elbows. If your hair is long, fasten it. 
Insert the ends of your necktie or scarf inside clothing or fasten it with 
• 
a nonconductive clip, approximately 8 centimeters (3 inches) from the 
end. 
Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners 
• 
for your clothing.  
Remember: Metal objects are good electrical conductors.  
						

							Chapter 2. Safety information
      5
Wear safety glasses when you are: hammering, drilling soldering, 
• 
cutting wire, attaching springs, using solvents, or working in any other 
conditions that might be hazardous to your eyes. 
After service, reinstall all safety shields, guards, labels, and ground wires. 
• 
Replace any safety device that is worn or defective. 
Reinstall all covers correctly before returning the machine to the 
• 
customer.
Electrical safety
CAUTION:  
Electrical current from power, telephone, and communication cables 
can be hazardous. To avoid personal injury or equipment damage, 
disconnect the attached power cords, telecommunication systems, 
networks, and modems before you open the server/workstation covers, 
unless instructed otherwise in the installation and configuration 
procedures.
Observe the following rules when working on electrical equipment.
Important:   Use only approved tools and test equipment. Some hand 
tools have handles covered with a soft material that does not 
insulate you when working with live electrical currents. 
Many customers have, near their equipment, rubber floor mats 
that contain small conductive fibers to decrease electrostatic 
discharges. Do not use this type of mat to protect yourself 
from electrical shock.
Find the room emergency power-off (EPO) switch, disconnecting 
• 
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 equipment that 
• 
has hazardous voltages. 
Disconnect all power before: 
• 
–  Performing a mechanical inspection
–  Working near power supplies
–  Removing or installing main units
Before you start to work on the machine, unplug the power cord. If 
• 
you cannot unplug it, ask the customer to power-off the wall box 
that supplies power to the machine and to lock the wall box in the off 
position.  
						

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If you need to work on a machine that has exposed electrical circuits, 
• 
observe the following precautions: –  Ensure that another person, familiar with the power-off controls, is 
near you.  
Remember: Another person must be there to switch off the power, if 
necessary.
–  Use only one hand when working with powered-on electrical 
equipment; keep the other hand in your pocket or behind your back.   
Remember: There must be a complete circuit to cause electrical 
shock. By observing the above rule, you may prevent a current from 
passing through your body.
–  When using testers, set the controls correctly and use the approved 
probe leads and accessories for that tester.
–  Stand on suitable rubber mats (obtained locally, if necessary) to 
insulate you from grounds such as metal floor strips and machine 
frames. 
Observe the special safety precautions when you work with very 
high voltages; these instructions are in the safety sections of 
maintenance information. Use extreme care when measuring high 
voltages.
Regularly inspect and maintain your electrical hand tools for safe 
• 
operational condition. 
Do not use worn or broken tools and testers. 
• 
Never assume
•   that power has been disconnected from a circuit. First, 
check that it has been powered-off.
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 normal operating places in a machine:–   Power supply units
–   Pumps
–   Blowers and fans
–   Motor generators
and similar units. ( This practice ensures correct grounding of the units.) 
If an electrical accident occurs:
• 
–  Use caution; do not become a victim yourself.
–   Switch off power.
–   Send another person to get medical aid. 
						

							Chapter 2. Safety information
      7
Safety inspection guide
The intent of this inspection guide is to assist you in identifying potentially 
unsafe conditions on these products. Each machine, as it was designed 
and built, had required safety items installed to protect users and service 
personnel from injury. This guide addresses only those items. However, 
good judgment should be used to identify potential safety hazards due to 
attachment of features or options not covered by this inspection guide. 
If any unsafe conditions are present, you must determine how serious the 
apparent hazard could be and whether you can continue without first 
correcting the problem.
Consider these conditions and the safety hazards they present: Electrical hazards, especially primary power (primary voltage on the 
• 
frame can cause serious or fatal electrical shock). 
Explosive hazards, such as a damaged CRT face or bulging capacitor 
• 
Mechanical hazards, such as loose or missing hardware 
• 
The guide consists of a series of steps presented in a checklist. Begin the 
checks with the power off, and the power cord disconnected.
Checklist: 
1.   Check exterior covers for damage (loose, broken, or sharp edges). 
2.   Power-off the computer. Disconnect the power cord. 
3.   Check the power cord for: 
a.   A third-wire ground connector in good condition. Use a meter to 
measure third-wire ground continuity for 0.1 ohm or less between 
the external ground pin and frame ground. 
b.   The power cord should be the appropriate type as specified in the 
parts listings. 
c.   Insulation must not be frayed or worn.
4.   Remove the cover.
5.   Check for any obvious alterations. Use good judgment as to the safety 
of any alterations. 
6.   Check inside the unit for any obvious unsafe conditions, such as metal 
filings, contamination, water or other liquids, or signs of fire or smoke 
damage. 
7.   Check for worn, frayed, or pinched cables. 
8.   Check that the power-supply cover fasteners (screws or rivets) have not 
been removed or tampered with. 
						

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Handling electrostatic discharge-sensitive devices 
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. 
Notes: 
1.  Use product-specific ESD procedures when they exceed the 
requirements noted here. 
2.   Make sure that the ESD protective devices you use have been certified 
(ISO 9000) as fully effective. 
When handling ESD-sensitive parts:  Keep the parts in protective packages until they are inserted into the 
• 
product. 
Avoid contact with other people. 
• 
Wear a grounded wrist strap against your skin to eliminate static on 
• 
your body. 
Prevent the part from touching your clothing. Most clothing is insulative 
• 
and retains a charge even when you are wearing a wrist strap. 
Use the black side of a grounded work mat to provide a static-free 
• 
work surface. The mat is especially useful when handling ESD-sensitive 
devices. 
Select a grounding system, such as those listed below, to provide 
• 
protection that meets the specific service requirement. 
Note:  The use of a grounding system is desirable but not required to 
protect against ESD damage. 
–   Attach the ESD ground clip to any frame ground, ground braid, or 
green-wire ground. 
–   Use an ESD common ground or reference point when working on a 
double-insulated or battery-operated system. You can use coax or 
connector-outside shells on these systems. 
–   Use the round ground-prong of the ac plug on ac-operated 
computers.
Grounding requirements 
Electrical grounding of the computer is required for operator safety and 
correct system function. Proper grounding of the electrical outlet can be 
verified by a certified electrician.