compaq armada 100s and User Manual

							Removal and Replacement Preliminaries4-1
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Part Number: 177845-002    File name: Ch04
chapter
 
4
REMOVAL AND REPLACEMENT
PRELIMINARIES
NOTE:  In most countries, there are no options for warranty repair other
than “whole unit return.” Check with your Geo Service Manager to
determine if warranty repair costs are covered before ordering spare
parts or performing repairs.
This chapter provides essential information for proper and safe removal
and replacement service.
4.1  Required Tools
You will need the following tools to complete the removal and
replacement procedures:

 Magnetic Phillips screwdriver

 Tool kit (includes connector removal tool, loopback plugs, and case
utility tool)
 4.2  Service Considerations
 Listed below are some of the considerations that you should keep in
mind during disassembly and assembly procedures.
  IMPORTANT:  As you remove each subassembly from the computer,
place it (and all accompanying screws) away from the work area to
prevent damage.
 Plastic  Parts
 Using excessive force during disassembly and reassembly can damage
plastic parts. Use care when handling the plastic parts. Apply pressure
only at the points designated in the maintenance instructions. 
						

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 Cables and Connectors
 Cables must be handled with extreme care to avoid damage. Apply only
the tension required to unseat or seat the cables during removal and
insertion. Handle cables by the connector whenever possible. In all
cases, avoid bending, twisting, or tearing cables. Ensure that cables are
routed in such a way that they cannot be caught or snagged by parts
being removed or replaced. Handle flex cables with extreme care; they
tear easily.
 
 
 CAUTION:  When servicing the computer, ensure that cables are
placed in their proper location during the reassembly process.
Improper cable placement can damage the computer.
 
 4.3  Removable Drive Damage Prevention
 Removable drives are fragile components that must be handled with
care. To prevent damage to the computer, damage to a removable drive,
or loss of information, observe these precautions:

 Before removing or inserting a hard drive, shut down the computer.
If you are unsure whether the computer is off or in Hibernation, turn
the computer on, then shut it down.

 Before removing a diskette drive or CD-ROM drive, ensure that a
diskette or disc is not in the drive. Ensure that the CD-ROM tray is
closed.

 Before handling a drive, ensure that you are discharged of static
electricity. While handling a drive, avoid touching the connector.

 Handle drives on surfaces that have at least one inch of shock-proof
foam.

 Avoid dropping drives from any height onto any surface.

 After removing a hard drive, place it into a static-proof bag.

 After removing a CD-ROM drive or a diskette drive, place it into a
static-proof bag.

 Do not use excessive force when inserting a drive into a drive bay.

 Avoid exposing a hard drive to products that have magnetic fields
such as monitors or speakers. 
						

							Removal and Replacement Preliminaries4-3
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 Avoid exposing a drive to temperature extremes or to liquids.

 If a drive must be mailed, do the following:  place the drive into a
bubble pack mailer or other suitable form of protective packaging;
label the package “Fragile: Handle With Care.”
 4.4  Electrostatic Damage Prevention
 Many electronic components are sensitive to electrostatic discharge
(ESD). Circuitry design and structure determine the degree of sensitivity.
Networks built into many integrated circuits provide some protection,
but in many cases the discharge contains enough power to alter device
parameters or melt silicon junctions.
 A sudden discharge of static electricity from a finger or other conductor
can destroy static-sensitive devices or microcircuitry. Often the spark is
neither felt nor heard, but damage occurs. An electronic device exposed
to electrostatic discharge may not be affected at all and can work
perfectly throughout a normal cycle. It may function normally for a
while, then degrade in the internal layers, reducing its life expectancy.
 4.5  Packaging and Transporting Precautions
 Use the following grounding precautions when packaging and
transporting equipment:

 To avoid hand contact, transport products in static-safe containers
such as tubes, bags, or boxes.

 Protect all electrostatic-sensitive parts and assemblies with
conductive or approved containers or packaging.

 Keep electrostatic-sensitive parts in their containers until they arrive
at static-free workstations.

 Place items on a grounded surface before removing them from their
container.

 Always be properly grounded when touching a sensitive component
or assembly.

 Place reusable electrostatic-sensitive parts from assemblies in
protective packaging or non-conductive foam.

 Use transporters and conveyers made of antistatic belts and roller
bushings. Ensure that mechanized equipment used for moving
materials is wired to ground, and that proper materials were selected
to avoid static charging. When grounding is not possible, use an
ionizer to dissipate electric charges. 
						

							4-4Removal and Replacement Preliminaries
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 4.6  Workstation Precautions
 Use the following grounding precautions at workstations:

 Cover the workstation with approved static-dissipative material
(refer to Table 4-2 later in this chapter).

 Use a wrist strap connected to a properly grounded work surface and
use properly grounded tools and equipment.

 Use field service tools, such as cutters, screwdrivers, and vacuums
that are conductive.

 When using fixtures that must directly contact dissipative surfaces,
use fixtures made of static-safe materials only.

 Keep work area free of nonconductive materials such as ordinary
plastic assembly aids and Styrofoam.

 Handle electrostatic-sensitive components, parts, and assemblies by
the case or PCM laminate. Handle them only at static-free
workstations.

 Avoid contact with pins, leads, or circuitry.

 Turn off power and input signals before inserting or removing
connectors or test equipment.
 4.7  Grounding Equipment and Methods
 Grounding equipment must include either a wrist strap or a foot strap at
a grounded workstation.

 When seated, wear a wrist strap connected to a grounded system.
Wrist straps are flexible straps with a minimum of one megaohm
±10% resistance in the ground cords. To provide proper ground,
wear a strap snug against the skin at all times. On grounded mats
with banana-plug connectors, connect a wrist strap with alligator
clips.

 When standing, use foot straps and a grounded floor mat. Foot
straps (heel, toe, or boot straps) can be used at standing workstations
and are compatible with most types of shoes or boots. On
conductive floors or dissipative floor mats, use them on both feet
with a minimum of one-megohm resistance between the operator
and ground. To be effective, the conductive strips must be worn in
contact with the skin. 
						

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Other grounding equipment recommended for use in preventing
electrostatic damage include:

 Antistatic tape

 Antistatic smocks, aprons, or sleeve protectors

 Conductive bins and other assembly or soldering aids

 Non-conductive foam

 Conductive tabletop workstations with ground cord of one-megohm
resistance

 Static-dissipative table or floor mats with hard tie to ground

 Field service kits

 Static awareness labels

 Material-handling packages

 Non-conductive plastic bags, tubes, or boxes

 Metal tote boxes

 Electrostatic Voltage Levels and Protective Materials 
						

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Table 4-1 shows how humidity affects the electrostatic voltage levels
generated by different activities.
Table 4-1
Typical Electrostatic Voltage Levels
Relative Humidity
Event 10% 40% 55%
Walking across carpet 35,000 V 15,000 V 7,500 V
Walking across vinyl floor 12,000 V   5,000 V 3,000 V
Motions of bench worker   6,000 V      800 V    400 V
Removing DIPS from plastic tube   2,000 V      700 V    400 V
Removing DIPS from vinyl tray 11,500 V   4,000 V 2,000 V
Removing DIPS from Styrofoam 14,500 V   5,000 V 3,500 V
Removing bubble pack from PCB 26,500 V 20,000 V 7,000 V
Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V
NOTE:  A product can be degraded by 700 volts.
Table 4-2 lists the shielding protection provided by antistatic bags and
floor mats.
Table 4-2
Static-Shielding Materials
Material Use Voltage Protection Level
Antistatic plastic Bags  1,500 V
Carbon-loaded plastic Floor mats  7,500 V
Metallized laminate Floor mats 15,000 V 
						

							Removal and Replacement Procedures5-1
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Writer: David Calvert    Saved by: The Integrity Group    Saved date: 09/27/00 9:24 AM
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Part Number: 177845-002    File name: Ch05
chapter
 
5
REMOVAL AND REPLACEMENT PROCEDURES
NOTE:  In most countries, there are no options for warranty repair other
than “whole unit return.” Check with your Geo Service Manager to
determine if warranty repair costs are covered before ordering spare
parts or performing repairs.
This chapter provides removal and replacement procedures for the
Compaq Armada 100S and Notebook 100 Series.
5.1  Serial Number
Report the computer serial number to Compaq when requesting
information or ordering spare parts. The serial number is located on the
bottom of the computer (Figure 5-1).
Figure 5-1.  Serial Number Location 
						

							5-2Removal and Replacement Procedures
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5.2  Disassembly Reference Chart
Use the chart below to determine the section number to be referenced
when removing components from the computer.
5.3  Preparing the Computer for Disassembly
5.4  Battery Pack
5.5  Modem
5.6  Fan Assembly
5.7  CD-ROM Drive
5.8  Processor
5.9  Memory
Removing a Memory Expansion Board
Installing a Memory Expansion Board
5.10  Top Cover
5.11  Hard Drive
5.12  Real Time Clock (RTC) Battery
5.13  Keyboard
5.14  EMI Shield
5.15  TouchPad
5.16  Speakers
5.17  Display Assembly
5.18  Speaker Housing
5.19  System Board
5.20  Diskette Drive
5.3  Computer Disassembly Preparation
Perform the following steps before disassembling the computer. Consult
the computer reference guide for instructions on the following steps:
1.  Remove any diskettes installed in the diskette drive.
2.  Remove any CD-ROM discs installed in the CD-ROM drive.
3.  Turn off the computer and close it.
4.  Disconnect the AC Adapter and external devices.
5.  Remove the battery pack (Section 5.4). 
						

							Removal and Replacement Procedures5-3
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5.4  Battery Pack
Battery Pack
Spare Part Numbers
Battery pack, NiMH 174373-001
Battery pack, Li ion 174372-001
1.  Prepare the computer for disassembly (Section 5.3).
2.  Turn the computer bottom side up with the right side facing forward.
3.  Lift the battery tab up 

 (Figure 5-2).
4.  Slide the battery release switch to the left 
.
5.  Lift up the front edge of the battery pack and swing it away from
computer 
.
6.  Remove the battery pack.
Figure 5-2.  Removing the Battery Pack
Reverse the removal procedure to replace the battery pack. 
						

							5-4Removal and Replacement Procedures
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Part Number: 177845-002    File name: Ch05
5.5  Modem
Modem
Spare Part Numbers
56Kbps modem board 176052-001
Modem cover (spared in Plastics Kit) 176048-001
Modem shield (spared in Hardware Kit) 176046-001
Modem cable (spared in Cable Kit) 176004-001
1.  Prepare the computer for disassembly (Section 5.3).
2.  Turn the computer bottom side up with the front facing forward.
3.  Remove the screw 

 securing the modem cover to the
base assembly (Figure 5-3).
4.  Lift the left side of the modem cover and swing it up and to the
right 
.
5.  Remove the modem cover.
Figure 5-3.  Removing the Modem Cover