compaq armada m700 User Manual

							Removal and Replacement Preliminaries    4-5
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 megohm ±10% resistance in the ground cords.
To provide proper ground, a strap must be worn snug against the skin. 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.
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 
						

							4-6    Removal and Replacement Preliminaries
Electrostatic Voltage Levels and Protective Materials
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:  700 volts can degrade a product.
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 Procedures    5-1
chapter
 
5
REMOVAL AND REPLACEMENT
PROCEDURES
5.1  Serial Number
The computer serial number should be reported to Compaq when requesting
information or ordering spare parts. The serial number is located on the bottom of the
computer.
Figure 5-1.  Serial Number Location 
						

							5-2    Removal and Replacement Procedures
5.2  Disassembly Sequence Chart
Use the chart below to determine the section number to be referenced when removing
the components from the computer.
5.3  Disconnecting the Computer
5.4  Computer Feet
5.5  Preparing the Computer for Disassembly
5.6  Battery Packs
Removing a Battery Pack
Inserting a Battery Pack
5.7  Hard Drives
Removing a Hard Drive
Inserting a Hard Drive
5.8  MultiBay Devices
Removing MultiBay Devices
Inserting MultiBay Devices
Inserting a Hard Drive in the MultiBay Adapter
5.9  PC Cards
Removing a PC Card
Inserting a PC Card
5.10  Modem/Combo Card
5.11  RTC Battery
5.12  Keyboard
5.13  Memory Expansion
Removing a Memory Expansion Board
Installing a Memory Expansion Board
5.14  Switch Cover
5.15  Display Assembly
5.16  Top Cover
5.17  USB Board
5.18  Voltage Converter Board
5.19  Infrared Board
5.20  System Board
5.21  Fan
Figure 5-2.  Computer Disassembly Sequence Chart 
						

							Removal and Replacement Procedures    5-3
5.3  Disconnecting the Computer
1.  Shut down the computer.
2.  Close the computer.
3.  Position the computer so the rear panel faces forward.
4.  Disconnect the power cord from the AC Adapter ! (Figure 5-3).
5.  Disconnect the power cord from the wall outlet .
6.  Disconnect the AC Adapter cord from the computer #.
Figure 5-3.  Disconnecting the Computer
7.  Turn off and disconnect external devices. 
						

							5-4    Removal and Replacement Procedures
5.4  Computer Feet
The computer feet are oval, adhesive-backed rubber pads. The computer feet are
included in the Miscellaneous Plastic Spare Kit.
Install the feet by removing the protective covering from the adhesive back an
attaching the feet to the bottom of the computer (Figure 5-4).
NOTE:  The front left computer foot adheres to the bottom of the battery pack.
Figure 5-4.  Installing the Computer Feet 
						

							Removal and Replacement Procedures    5-5
5.5  Preparing the Computer for Disassembly
1.  Shut down the computer.
2.  Disconnect the AC Adapter and all external devices connected to the computer.
3.  Remove the battery pack from the battery bay (Section 5.6).
CAUTION:  Failure to disconnect the AC Adapter from the computer and remove the
battery pack before removing and installing internal components can damage the
equipment.
4.  Remove the hard drive (Section 5.7).
5.  Remove MultiBay devices (Section 5.8).
NOTE:  MultiBay devices other than MultiBay battery packs may be left inside the
MultiBay to provide balance when the computer is open. If installed, remove the
MultiBay battery pack.
6.  Remove all PC Cards (Section 5.9). 
						

							5-6    Removal and Replacement Procedures
5.6  Battery Packs
!
WARNING:  To reduce the risk of injury or damage to the battery pack, do not crush,
puncture, or incinerate the battery pack or short the metal contacts. Do not attempt to
open or service the battery pack.
Removing a Primary Battery Pack from the Battery Bay
1.  If the computer is turned on, press the suspend button. If there is hard drive or
diskette activity, Suspend may not occur immediately. The computer screen clears
and the power/suspend light begins to flash when Suspend is initiated.
If the computer is turned off or in Suspend or Hibernation, proceed to Step 2.
2.  Close the computer.
3.  Tilt the computer at an angle ! so the bottom of the computer is accessible
(Figure 5-5).
4.  Slide the battery release latch toward the back of the computer .
5.  Pull the battery pack out of the battery bay #.
Figure 5-5.  Removing a Battery Pack 
						

							Removal and Replacement Procedures    5-7
Inserting a Primary Battery Pack in the Battery Bay
CAUTION:  To prevent damage to the computer, do not insert a battery pack until the
computer is fully reassembled.
1.  Close the computer.
2.  Tilt the computer up ! (Figure 5-6).
3.  With the smooth side of the battery pack facing up and the battery cells facing in,
lead the rounded edge of the battery pack into the battery bay. Angle the battery
pack into the bay until it is fully seated .
Figure 5-6.  Inserting a Battery Pack
4.  If the computer is in Suspend, press the suspend button to return to your work.
Refer to Section 5.8 for information on removing a MultiBay battery pack. 
						

							5-8    Removal and Replacement Procedures
5.7  Hard Drives
Removing a Hard Drive from the Hard Drive Bay
Before removing a hard drive, back up all information on the hard drive.
1.  Save all work, exit all applications, and shut down the computer.
2.  Tilt the computer at an angle ! so the bottom of the computer is accessible
(Figure 5-7).
3.  If the hard drive has been secured in the hard drive bay with a security screw ,
remove the screw using the security screwdriver provided with the computer.
Figure 5-7.  Removing the Hard Drive Screw