compaq lte 5000 User Manual

							to the system board. It is an omnidirectional condenser microphone with a
standard sensitivity of 40dB. The microphone is mounted in a rubber boot
to provide acoustic isolation and is mounted at the right side of the
keyboard, under the CPU cover.
Status Panel
The status panel is located immediately below the LCD panel on the system
unit. The panel displays a series of icons to indicate system status as
described in Table 1-3.
The status panel also contains two status indicator lights. The right
indicator light provides battery status; the left indicator light provides
power-on and Standby (Suspend) status. Access to the display panel for
service requires removal of the CPU cover. The status display is secured
with two screws. The status panel cable plugs into an 8-pin connector on
the processor board.
Processor Board
The processor board supports the following:
o Processor
o DC-to-DC converter is used only with processors that operate at higher
than 75 MHz.
o L2 cache
o System RAM
o System memory expansion connector
o Power, display, and standby switches
o Infrared serial port (IrDA)
o Display panel configuration jumpers
o Power-on password jumper
The computer supports 75, 90, 100, 120, 133-, and 150-MHz Mobile Pentium
processors. The processor is soldered to the processor board, so
replacement is accomplished by replacing the processor board. A heat sink
on the processor and a cooling fan maintain an operating temperature
within the limits specified by the CPU manufacturer and other components.
All I/O buffers operate at 3.3 volts.The 75-MHz processor core operates at
3.3 volts. The 150-MHz processor core operates at 3.1 volts. The 90-Mhz,
100mhz, 120-MHz, and 133-MHz processor cores operate at 2.9 volts. The 2.9
volts is provided by a DC-to-DC converter mounted on the processor board.
The processors are of a tape carrier package (TCP) design that has a high
pin count, low profile, and reduced footprint. The processor is easily
damaged, so the pins and body of the processor should not be touched. 
						

							The L2 cache is implemented as direct-mapped, write-back cache with a size
of 256 KB.
The power switch, display switch, and standby (suspend) button are mounted
on the processor board. They are operated by switch actuators mounted on
the CPU cover.
The power switch turns system power on and off. When the switch is pushed
to turn the power off, the system displays a warning message that all
unsaved data will be lost. The shut down process is then completed by
pressing Enter.
The display switch turns the display off and initiates a beep if the
display is closed with the computer on. When used with the standby switch,
the display switch initiates a system restart.
The standby (suspend) button initiates and exits Standby (suspend). As
described above, the standby button, when used with the display switch,
initiates a system restart. When used with the Fn key, the standby button
initiates Hibernation.
The processor board contains 8 MB or 16 MB of onboard memory and can be
expanded to 72 or 80 MB by adding a 64 MB memory expansion board. The
memory expansion boards are available in 8, 16, 32, and 64 MB DRAM
configurations. Each module is composed of two boards assembled together.
The system ROM is shadowed in system memory.
The infrared subsystem (IrDA) provides two-way wireless communication
using infrared as a transmission medium. Proper operation requires the
communicating infrared ports to be within a 30-degree path and no more
than three feet (1 meter) apart.
The processor board must be configured according to the display type. This
is done by setting Jumpers JP2, JP3, and JP4 on the processor board. Use
Table 1-5 to determine proper jumper settings for the display.
Table 1-5. Display Configuration Jumpers
===========================================================================
Display Type Jumper JP3 Jumper JP2 Jumper JP4
===========================================================================
LTE 5000 10.4 in VGA CSTN 1-2 2-3 1-2
LTE 5000 10.4 in VGA CTFT 2-3 2-3 1-2
LTE 5000 11.3 in SVGA CSTN 1-2 2-3 2-3
LTE 5100 10.4 in SVGA CTFT 2-3 2-3 2-3
LTE 5200 10.4 in SVGA CTFT 2-3 2-3 2-3
LTE 5280 11.3 in SVGA CTFT 2-3 2-3 2-3
LTE 5300 12.1 in SVGA CTFT 2-3 2-3 2-3
LTE 5150 Rev. 4X 11.3 in
SVGA CSTN 1-2 1-2 1-2
LTE 5150 Rev. 2X SVGA CSTN 2-3 1-2 1-2 
						

							LTE 5250 10.4 in SVGA CTFT 2-3 2-3 2-3
LTE 5380 12.1 in 1024 x 768
CTFT 2-3 1-2 1-2
LTE 5400 12.1 in 1024 x 768
CTFT 2-3 2-3 2-3
===========================================================================
The power-on password jumper is also located on the processor board. To
erase the power-on password, set jumper JP1 to pins 1 and 2; set JP1 to
pins 2 and 3 for normal operation. See Chapter 2 for more details.
To remove and replace the processor board, you must first remove the CPU
cover, EMI shield, keyboard, and display unit. The processor board is
secured in place with two screws and is connected to the system board with
two connectors.
System Board
There are three system boards for the computer: one to support the 75 MHz,
90 MHz and 120 MHz processors (LTE 5000, LTE 5100, and LTE 5200); one to
support the 120 MHz, 100MHz, and 133 MHz processors (LTE 5280, LTE 5300,
LTE 5150, and LTE 5250); and one to support the 133 MHz processor (LTE
5380) and 150MHz processor (LTE 5400). The system board supports the
following:
o System ROM (BIOS)
o Graphics subsystem
o Audio subsystem
o PC Card subsystem
o Diskette drive controller
o RS-232 and IrDA serial ports
o IDE interface
o Fan connector
o I/O connectors
The firmware components for the computer include:
o System BIOS for the OPTi Viper Notebook chip set
o ROM-based setup
o MAXIMIZER Power Management for OPTi Viper
o APM 1.1 BIOS
o Plug and Play BIOS 
						

							o PCI BIOS
o Keyboard Controller Firmware for the Intel 80C51SL
o VGA BIOS
The ROM-based setup has been translated into ten languages in addition to
English. Messages that are displayed by the BIOS which require no user
interaction are displayed in English. This includes POST warning messages,
error messages, and runtime warnings and notifications. Messages that are
displayed by the BIOS which require user interaction are translated into
the same language as Setup.
The graphics controller interfaces with the system through the PCI bus.
The controller provides backward compatible modes to support CGA, EGA,
MGA, and HGA as well as all current VGA and SVGA modes. The controller
supports the internal LCD panels as well as an external CRT and
simultaneously supports the LCD and CRT (except for models with the
11.3-in CSTN SVGA display). The CRT interface is also routed to the either
expansion base through the external options connector. For LCD only and
LCD/CRT simultaneous display modes, the following panel and color
resolutions are supported:
Table 1-6. Maximum Resolutions Supported
===========================================================================
Display Type Display Modes Color Depth Supported
===========================================================================
640 x 480 CTFT 640 x 480 256, 64K, 16M
800 x 600 CTFT 640 x 480, 800 x 600 256, 64K
640 x 480 CSTN 640 x 480 256, 64K
800 x 600 CSTN 640 x 480, 800 x 600 256
1024 x 768 CTFT 1024 x 768 256
===========================================================================
The graphics controller also supports display of real-time video from the
MPEG and TV Video Adapter at a rate of 30 frames per second (fps). It
provides the capability to overlay the video in a Windows screen.
The computer has 1 MB of video DRAM soldered to the system board. There
is no provision for adding additional video memory.
The graphics subsystem is designed to minimize the use of power at all
times. When the system is idle for a set period of time, the controller is
placed in the lowest power state. The LCD panel backlight and panel power
are turned off during periods of inactivity after a timeout as determined
by the user in Computer Setup. The system supports Energy Star monitors
and allows the feature to be turned on/off from Computer Setup.
The computer supports an interface to an MPEG and TV Video Adapter that
attaches to the rear of the computer. The adapter provides up to 30 fps of
live video or MPEG video to the graphics controller for display on the
LCD, a CRT, or a television. The MPEG and TV Video Adapter and CD-ROM 
						

							drive can be used simultaneously.
The audio subsystem is integrated into the system board. The system
supports an internal microphone, stereo speakers, SoundBlaster PRO
compatible audio, CD-ROM audio inputs, an external jack for headphones or
speakers, microphone jack, and line-input jack. Line and CD-ROM inputs and
the speaker outputs are passed through the external options connector and
supported by both expansion bases.
The internal speakers are disabled when the computer is docked in the
expansion base and when headphones or external speakers are installed.
The heart of the audio subsystem is the ESS1688 (ESS688 on Windows 3.1/Dos
6 units) AudioDrive ASIC that provides 16-bit stereo WAV audio, audio
mixing, and FM music synthesis. The entire audio system connects directly
to the ISA bus.
The ESS1688 is OPL3 compatible and compatible with SoundBlaster PRO and
Microsoft Windows Sound System. It can record, compress, and play back
sound and music at 8 or 16 bits up to 44 Khz.
The computer has one PC Card (PCMCIA) controller that supports a Type III
PC card slot that supports either two Type II PC Cards or one Type III PC
Card. A PC card door prevents contamination of the slot. The controller is
Intel ExCA compatible and complies with the Berlin revision of the PCMCIA
standard. The controller supports 5-V cards and all current Compaq PC
Cards. A second PC Card controller is located in both expansion bases.
The diskette drive controller supports 720K, 1.2 MB, and 1.44 MB densities
as well as automatic media detection. Diskette drives can be used in the
computer MultiBay and the expansion bases. When using Windows 95, real
mode drivers must be used for a diskette drive in the expansion base. For
more information see Solving Diskette and Diskette Drive Problems in
Chapter 2.
The PC87334 Super I/O contains two UARTs which are fully compatible with
NS15450 and NS16550. Both ports support MIDI baud rates and one port also
supports IrDA and HP SIR compliant signaling protocol. The two serial
ports are configured as one RS- 232C serial port and one infrared (IrDA)
port.
o The standard RS-232 serial port has an 82550 compatible serial
controller. The physical connector is a standard 9-pin D connector. The
interface can be configured as COM1, COM2, COM3, or COM4.
o The infrared communication is implemented with an 82550 compatible
serial controller. The minimum data rate supported by the Infrared Port
is 115K bits per seconds. The interface can be configured as COM1, COM2,
COM3, or COM4.
The parallel port support is integrated into the PC87334 Super I/O. The
computer has one parallel port that can be configured to operate in
compatible mode, enhanced modes 1.7 and 1.9 (EPP), and extended
capabilities (ECP) mode (IEEE-1284 compatible). The default mode is the
compatible mode. The physical connector is a standard 25-pin D connector.
The parallel port interface can be configured as LPT1, LPT2, or LPT3.
When the computer is mounted in either expansion base, the system can 
						

							support up to four IDE hard drives. When using two hard drives in the
computer, one of the hard drives is installed in the dedicated hard drive
bay and the other in the MultiBay.
NOTE: The dedicated hard drive bay provides limited support for the Compaq
LTE Elite hard drive. See Appendix C for details.
The hard drive remains powered off from Standby (Suspend) until the first
access occurs. The hard drive is powered off during Standby (Suspend).
The cooling fan is mounted in the system unit on the left side at the
ventilation exhaust port. Functioning as an exhaust fan, it provides air
flow across the electronic components for cooling. The fan plugs into a
2-pin connector on the system board.
The I/O connector panel is an integral part of the system board. In
addition to the I/O panel, the system board supports the following:
o PC card rails and connectors
o Battery bay contacts
o Hard drive bay connector
o MultiBay mass storage device connector
o MultiBay battery contacts
o Power board connectors
o Processor board connectors
o Fan connector
o LCD panel connector
o Speaker connector
o Integrated microphone connector
o External microphone connector
o Volume control
The CPU cover, display unit, keyboard, processor board, and power board
must be removed prior to removing the system board. The system board is
secured with two screwlocks on the I/O connector panel, a standoff in the
left rear corner, and three screws.
IMPORTANT: Correct positioning of the system board is essential for proper
interconnect of the computer with either expansion base. When
installing a system board, be sure the locating pins near the
mounting screws properly engage the system board. 
						

							A connector on the rear of the computer interfaces with either expansion
base to provide additional functionality. The expansion base replicates
the following computer connectors:
o Serial connector
o Parallel connector
o External monitor connector
o PS/2-compatible mouse connector
o Power connector
o External keyboard connector
o All audio connectors except mono microphone jack
Additional MultiBay Expansion Base and MultiBay ISA details are presented
in Section 1.5.
Power Board
The power board is a DC-to-DC converter that provides the required
voltages of +3.3 and +5 volts from one of the power sources (main battery
pack, AC Adapter, or Automobile Adapter).
The power board is provided as a field replaceable unit. To remove and
replace the power board, you must first remove the CPU cover, keyboard,
and processor board. The power board connects to the system board with two
connectors and is secured in place with one screw.
Keyboard
The keyboard is available as an assembly consisting of the following
parts:
o Keyboard
o Keyboard bezel
o Battery release
o MultiBay device release
o EasyPoint II controller
The battery release, MultiBay device release, and EasyPoint II controller
are also available as replaceable units.
To remove the keyboard assembly, the CPU cover must be removed first. The
keyboard ribbon cable (ZIF connector) and EasyPoint II controller cable
must be disconnected. Three screws on the bottom on the system unit and
four screws across the front (inside of the MultiBay and dedicated battery
compartment) must then be removed to release the keyboard. 
						

							The battery release mechanism consists of the following parts:
o Battery release actuator
o Battery release spring
o Battery release holder
o Battery release hook
o Battery release hook spring
All of these components are included in the Latches Kit.
The battery release spring maintains the mechanism in the latched state
until the release actuator is pushed. This action retracts the release
hook from the battery. The release hook spring ensures that the battery
hook firmly engages the battery. The battery release holder serves as a
mounting platform for the other release mechanism components. The release
hook and release hook spring are fastened to the release holder with a
screw. The release spring connects the release actuator to the holder. The
holder is held to the bottom of the keyboard with two screws.
The MultiBay device release mechanism is very similar to the battery
release mechanism and consists of the following parts:
o MultiBay device release actuator
o MultiBay release spring
o MultiBay release holder
o MultiBay release hook
o MultiBay release hook spring
o CD-ROM drive release bar
All of these components are included in the Latches Kit.
The MultiBay device release spring maintains the mechanism in the latched
state until the release actuator is pushed. This action retracts the
release hook from the diskette drive or hard drive. Pushing the release
actuator also causes the CD-ROM drive release bar to eject a CD-ROM drive
if one is installed. The release hook spring ensures that the release hook
firmly engages the device in the MultiBay. The MultiBay release holder
serves as a mounting platform for the other release mechanism components.
The release hook and release hook spring are fastened to the release
holder with a screw. The release spring connects the release actuator to
the holder. The holder is held to the bottom of the keyboard with a screw
and standoff.
The EasyPoint II controller supports the mouse buttons and the EasyPoint
II pointing stick. It is mounted to the bottom of the keyboard assembly
directly under the mouse buttons. The CPU cover and keyboard must be
removed to gain access to the controller. Two screws hold the controller 
						

							to the keyboard. Once released, the flat cable can be disconnected from
the ZIF connector on the underside of the controller.
MultiBay
The MultiBay accommodates the following devices:
o Dual-speed, quad-speed, or 6x CD-ROM drive
o Second hard drive
o Second battery pack
o 3.5-inch diskette drive
NOTE: The hard drive must be mounted in the MultiBay hard drive carrier
before it can be installed into the MultiBay.
The computer must be turned off when inserting a drive (not the battery
pack) or removing it from the MultiBay.
Chapter 1.5 Optional MultiBay Expansion Base and MultiBay ISA Expansion Base Features 
The MultiBay Expansion Base and MultiBay ISA Expansion Base provide fully
integrated desktop capabilities for the computer. The expansion base
eliminates the need to disconnect external devices when you remove the
computer from the expansion base. The optional expansion base has the
following features:
o Two MultiBay device bays
o One serial port
o One parallel port
o PS/2 mouse port
o External keyboard port
o One SVGA CRT port
o Ethernet RJ-45 and BNC ports
o Two Type III PC Card slots
o Audio line out, headphones out
o Audio line in
o IR interface for IrDA wireless operations
o Battery charge indicators
o Drive activity indicators 
						

							o Security features
o Stereo speakers
o ISA expansion slot (MultiBay ISA Expansion Base)
o High performance stereo speakers and new audio bass ports on both sides
of the expansion base for Compaq PremierSound audio system (MultiBay ISA
Expansion Base)
Chapter 1.6 MultiBay Expansion Base and MultiBay ISA Expansion Base Components 
The external components on the front and right sides of the expansion base
are shown in Figure 1-4 and described in Table 1-7.
Table 1-7. Expansion Base Components - Front and Right Sides
===========================================================================
Item Description
===========================================================================
1 Monitor support cover slots
2 External options connector
3 Stereo speakers (MultiBay Expansion Base model)