compaq contura 400 family User Manual

							Grounding Methods
The method for grounding must include a wrist strap or a foot strap at a
grounded workstation. When seated, wear a wrist strap connected to a
grounded system. When standing, use footstraps and a grounded floor mat.
Table 2-2. Static-Shielding Protection Levels
===========================================================================
Method Voltages
===========================================================================
Anti-static Plastic 1,500
Carbon-Loaded Plastic 7,500
Metallized Laminate 15,000
===========================================================================
Grounding Workstations
To prevent static damage at the workstation, follow these precautions:
o Cover the workstation with approved static-dissipative material.
Provide a wrist strap connected to the work surface and properly
grounded tools and equipment.
o Use static-dissipative mats, heel straps, or air ionizers to give added
protection.
o Handle electrostatic sensitive components, parts, and assemblies by the
case or PCB laminate. Handle them only at static-free workstations.
o Avoid contact with pins, leads, or circuitry.
o Turn off power and input signals before inserting and removing
connectors or test equipment.
o Use fixtures made of static-safe materials when fixtures must directly
contact dissipative surfaces.
o Keep work area free of nonconductive materials such as ordinary plastic
assembly aids and Styrofoam.
Grounding Equipment
Use the following equipment to prevent static electricity damage to the
equipment:
Wrist Straps are flexible straps with a minimum of 1 megohm +/-10%
resistance to the ground cords. To provide proper ground, a strap must be
worn snug against the skin. On grounded mats without banana-plug
connectors, connect a wrist strap with alligator clips.
Heelstraps/Toestraps/Bootstraps can be used at standing workstations and
are compatible with most types of boots and shoes. On conductive floors or 
						

							dissipative floor mats, use straps on both feet with a minimum of 1 megohm
of resistance between operator and ground. To be effective, the conductive
strips must be worn in contact with the skin.
Field service tools, such as cutters, screwdrivers, vacuums, that are
conductive.
Portable field service kit with a static dissipative vinyl pouch that
folds out of a work mat. Also use a wrist strap and a ground cord for the
work surface. Ground the cord to the chassis of the equipment undergoing
test or repair.
Recommended Materials and Equipment
Other materials and equipment that are recommended for use in preventing
static electricity include:
o Anti-static tape
o Anti-static smocks, aprons, or sleeve protectors
o Conductive bins, and other assembly or soldering aids
o Conductive foam
o Conductive table-top workstations with ground cord of 1 megohm of
resistance
o Static dissipative table or floor mats with hard tie to ground
o Field service kits
o Static awareness labels
o Wrist straps and footwear straps providing 1 megohm +/- 10% resistance
o Material handling packages
o Conductive plastic bags
o Conductive plastic tubes
o Conductive tote boxes
o Metal tote boxes
o Opaque shielding bags
o Transparent metallized shielding bags
o Transparent shielding tubes
Chapter 2.2 Service Preliminaries 
Some of the service preliminaries that should be kept in mind during the
disassembly and assembly of the computer include: 
						

							o Tool requirements
o Screws
o Cable and connectors
o Plastics
Tool Requirements
o Flat-bladed screwdriver
o Torx T8 screwdriver (included in 130619-001)
o Hex socket driver (3/16)
o 25-Pin printer loopback plug (included in 100767-001)
o 9-Pin serial loopback plug (included in 100767-001)
o Trackball removal tool (spare part number 147779-001)
o Case Utility tool (spare part number 119070-001 and included in
100767-001))
o Preloaded application diskettes (Compaq Order Center, 1-800-952-7689)
Cables and Connectors
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION >>>>>>
						

							>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
						

							state, province, or local regulations. Whenever possible, recycle the
battery components.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING >>>>>>
						

							Chapter 3. Removal and Replacement Procedures 
 
Introduction 
This chapter provides complete removal and replacement procedures for the
Compaq Contura 400 Family of Personal Computers. Procedures that apply to
specific models are indicated in parenthesis.
After completing removal and replacement procedures, run the diagnostics
program to verify that all components operate properly.
For replacement procedures, follow the removal procedures in reverse order
unless otherwise specified.
Chapter 3.1 Disassembly/Assembly Sequence Chart 
This chart shows the order in which disassembly procedures are provided:
|-- 3.2 PREPARING THE COMPUTER
| |-- AC Adapter
| |-- Battery pack
|
|-- 3.3 HANDLE BRACKET
|
|-- 3.4 TILT FEET
|
|-- 3.5 HARD DRIVE
|
|-- 3.6 MEMORY EXPANSION BOARD
|
|-- 3.7 KEYBOARD ASSEMBLY
| |-- CPU cover
| |-- Keyboard
|
|-- 3.8 BATTERY COMPARTMENT COMPONENTS
| |-- Battery compartment
| |-- Anti-skid pad
| |-- Battery release spring and button
|
|-- 3.9 REAL-TIME CLOCK BATTERY (Models 400 and 410)
|
|-- 3.10 REAL-TIME CLOCK BATTERY (Models 420 and 430)
|
|-- 3.11 PROCESSOR UPGRADE OPTION (Model 400 Only)
|
|-- 3.12 INTEGRATED MECHANICAL TRACKBALL ASSEMBLY
| |-- (Model 400 and 410)
|
|-- 3.13 INTEGRATED OPTICAL TRACKBALL ASSEMBLY
|
|-- 3.14 DISKETTE DRIVE (All Models)
| |-- Diskette drive
| |-- Diskette drive bracket
|
|-- 3.15 THE SYSTEM BOARD (All Models)
| 
						

							|-- 3.16 PC Card (PCMCIA) ASSEMBLY
|
|-- 3.17 PC Card (PCMCIA) EJECTION LEVERS AND PIN
|
|-- 3.18 PC Card (PCMCIA) DOORS AND SPRINGS
|
|-- 3.19 SYSTEM CHASSIS
| |-- Trough
|
|-- 3.20 CPU BASE
| |-- Battery shield clip
| |-- Lock provision plate
| |-- Anti-skid pads
|
|-- 3.21 DISPLAY ASSEMBLY COMPONENTS (Models 400 and 410)
| |-- Bezel
| |-- Latches
| |-- Inverter board
|
|-- 3.22 MONOCHROME DISPLAY (Models 400 and 410)
| |-- LCD Panel with Shield attached
| |-- Display cable
| |-- Display ground cable
|
|-- 3.23 COLOR STN (9.5) DISPLAY (Models 400 and 410)
| |-- LCD Panel
| |-- Shield
| |-- Display cable
| |-- Display ground cable
|
|-- 3.24 COLOR TFT (8.4) DISPLAY (Models 400 and 410)
| |-- LCD Panel
| |-- Shield
| |-- Display cable
| |-- Display ground cable
|
|-- 3.25 DISPLAY COMPONENTS (Models 420 and 430)
| |-- Bezel
| |-- Latches
| |-- Inverter board
|
|-- 3.26 COLOR STN (10.4) DISPLAY (Models 420 and 430)
| |-- LCD Panel
| |-- Shield
| |-- Display cable
| |-- Display ground cable
|
|-- 3.27 COLOR TFT (10.4) DISPLAY (Models 420 and 430)
| |-- LCD Panel
| |-- Shield
| |-- Display cable
| |-- Display ground cable
|
|-- 3.28 DISPLAY ENCLOSURE
|
|-- 3.29 CLUTCHES AND GROUND CLIPS
|
|-- 3.30 DOCKING BASE
| |-- Feet
| |-- Battery door 
						

							| |-- Handle
|
|-- 3.31 MONITOR SUPPORT COVER
Chapter 3.2 Preparing the Computer 
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING >>>>>>>
						

							5. Disconnect the AC Adapter power cord from the computer (Figure 3-2).
6. Eject the diskette (Figure 3-2) and PC Card, if installed. 
						

							7. Open the battery compartment by lifting up the front of the computer [1]
and sliding the battery compartment release button to the right [2]. The
battery compartment opens slightly. Lower the compartment [3]
(Figure 3-3).