compaq lte elite User Manual

							6.3 Features 
The Compaq SmartStation provides the following features:
o Motorized docking mechanism for easy docking and undocking of the
computer.
o The following sensors to help prevent improper docking or undocking:
- Computer-present sensor (to detect when the computer is in the docking
bay)
- Computer status sensor (to determine the on, off, or Standby status of
the computer)
- Motor loaded/unloaded sensor (to verify that the computer is completely
docked or undocked)
- A PCMCIA card sensor to detect the protrusion of a PCMCIA card or cable
when undocking
o A keylock switch that electronically disables the docking mechanism (to
prevent unauthorized docking and undocking of the computer) 
						

							o DC power to the computer when it is docked
o Ability to fast charge the battery pack in the computer whether the
expansion base is on or off
o Ability to fast charge an additional Compaq LTE Elite battery pack in the
SmartStation battery charging compartment
o Two full-sized slots for 8- or 16-bit Industry Standard Architecture
(ISA) expansion boards
o Two internal half-height drive bays
o Ability to start a docked Compaq LTE Elite computer from the computers
hard drive or from an IDE hard drive in the expansion base
o An integrated SCSI-2 controller that supports up to seven SCSI-2 devices,
including one internal SCSI-2 drive
o An integrated Ethernet controller (with RJ-45 and AUI connectors)
o The following standard external device connectors:
- PS/2 mouse
- External keyboard (enhanced 101/102-key)
- External monitor
- Serial (RS-232C compliant)
- SCSI-2
- Ethernet AUI (IEEE 802.3 10BASE5 or 10BASE2 with optional Thinnet
Coax Transceiver)
- Ethernet RJ-45 (IEEE 802.3 10BASE-T)
- Parallel
NOTE: The parallel port is Centronics compatible, EPP 1.9 compliant,
when the Compaq LTE Elite is docked.
o A removable monitor support cover capable of supporting an external
monitor weighing up to 55 lb (25 kg)
o Horizontal guides, keylock assembly, and override blocker for securing
the computer to the expansion base
o Provision for an optional cable lock for securing the expansion base to a
stationary object
o Ability to use power conservation mode for IDE hard drives and Energy
Star compliant monitors (when used with Compaq LTE Elite computer only) 
						

							o Manual eject override mechanism to allow the computer to be removed from
the expansion base in the event of mechanical or power failure
6.4 External Switches, Sensors, And LEDS 
This section covers the expansion base external switches, sensors, and LEDs
(Figure 6-3).
1. Power switch
2. PCMCIA card sensor receiver
3. PCMCIA card sensor emitter
4. Computer status sensor
5. Power LED
6. Hard drive LED
7. Eject switch
8. Battery charger LED
Power Switch
The expansion base has a momentary type power switch [1] (Figure 6-3) on
the front left of the unit. After the computer is docked, this switch
provides power to the main expansion base circuits and to the computer.
Refer to Power Switch in Section 6.6 for more information. 
						

							Eject Switch
The expansion base has a momentary type eject request switch [7] (Figure
6-3) on the front right of the unit that undocks the computer from the
expansion base. Refer to Eject Switch in Section 6.6 for more
information.
PCMCIA Card Sensor (Emitter and Receiver)
The PCMCIA card sensor is a two-part sensor consisting of a receiver [2]
and an emitter [3] (Figure 6-3). The sensor prevents undocking when it
detects that a PCMCIA card or cable extends beyond the safe limits of
the PCMCIA slot in the Compaq LTE Elite. Refer to Section 6.6 for more
information on the PCMCIA card sensor.
Computer Status Sensor
The computer status sensor [4] (Figure 6-3) is a two-part sensor on the
docking mechanism. Refer to Section 6.6 for more information on the
computer status sensor.
LEDs
The expansion base has the following LEDs on the front of the expansion
base (Figure 6-3):
[5] Power
[6] Hard drive
[7] Battery charger
Table 6-1 lists the LED functions.
Table 6-1. LED Functions
===========================================================================
LED Name Status Indication Color
===========================================================================
Power On Expansion base and CPU power on Green
Off Expansion base and CPU power off
---------------------------------------------------------------------------
Drive Activity On Hard drive being accessed Green
Off Hard drive not accessed
---------------------------------------------------------------------------
Battery Charger On Spare battery pack fast charging Orange
Off Spare battery pack trickle
charging or no spare battery
present
Flashing Battery fault:
Spare battery pack will not hold
a charge and has reached end of
its usefulness.
Spare battery pack internal fuel
gauge is inoperative.
Spare battery pack temperature
gauge is inoperative. 
						

							===========================================================================
A/B and C/D Drive Selection Switches
The A/B and C/D drive selection switches are mounted on the system board
and accessible from the outer rear panel (Figure 6-4).
The A/B drive selection switch sets an optional diskette drive in the
expansion base to operate as logical drive A (for using bootable diskettes)
or as logical drive B. The C/D drive selection switch sets an optional IDE
hard drive in the expansion base to be designated as logical drive C (the
boot drive) or as logical drive D.
NOTE: When a Compaq LTE Lite is docked in the expansion base, an IDE hard
drive in the SmartStation cannot be set as logical drive C or used as
the boot drive. Setting the C/D drive selection switch to C has no
effect.
Refer to Appendix C, Configuring the System for Optional Drives in the
Compaq SmartStation, for information about configuring optional drives and
about using the A/B and C/D switches.
6.5 Connectors  
						

							This section covers external input/output (I/O) connectors and the internal
drive bay connectors for the Compaq SmartStation. Refer to Appendix A for
connector pin assignments.
External I/O Connectors
1. SCSI-2
2. Ethernet TPE RJ-45
3. Ethernet AUI DB-15
4. Parallel
5. Serial
6. Mouse
7. External keyboard
8. External monitor
9. AC power
198-Pin External Options Connector
The 198-pin external options connector (Figure 6-6) handles the entire
electrical interface between the expansion base and the computer. The
external options connector automatically mates with the connector on the
computer during docking. 
						

							Internal Drive Connectors
Drive cables connect to the following connectors on the vertical circuit
board or the system board:
o 40-pin IDE hard drive signal connector (vertical circuit board)
o 34-pin diskette/tape drive signal connector (vertical circuit board)
o 4-pin diskette/tape drive power connector (vertical circuit board)
o 50-pin SCSI-2 connector (system board)
For ease of identification, the vertical circuit board (also known as the
backplane board) and system board (also known as the interconnect
board) each have a printed description of where the drive cables connect.
6.6 Functional Descriptions 
This section covers functional descriptions of key parts and features of
the Compaq SmartStation. For assembly/disassembly instructions for the
parts described in this section, refer to Chapter 4, Compaq LTE Elite
Removal and Replacement Procedures.
System Board 
						

							The following connectors, switches and sensors are on the system board
(Figure 6-7):
1. Internal SCSI-2 connector
2. Card edge connector for the vertical circuit board
3. Computer-present sensor
4. 198-pin external options connector for handling power and signal
information between the expansion base and computer
5. SCSI-2 connector
6. Ethernet RJ-45 connector
7. Ethernet AUI DB-15 connector
8. Motor position sensor
9. Connector for battery contacts board for the battery charger
10. Connector for the harness extension cable 
						

							11. Connector for docking mechanism motor
12. All pass-through I/O connectors
13. A/B switch
14. C/D switch
The following controllers are on the system board:
o Ethernet controller
o SCSI-2 controller
o Microcontroller (controls the battery charger, power up/down sequencing,
motor for the docking mechanism, and plug and play features for docking
and undocking)
Computer-Present Sensor
The computer-present sensor [3] (Figure 6-7) is an optical sensor on the
system board that detects when a computer is present in the docking bay of
the expansion base. When a computer is placed in the docking bay, the
computer pushes back a spring-loaded part that interrupts this sensor.
The computer-present sensor is integrated into the system board. To replace
the computer-present sensor, the system board must be replaced.
Motor Position Sensor
The motor position sensor [8] (Figure 6-7) is an optical sensor on the
system board that indicates when the computer is completely docked or
undocked by detecting a reflective spot on the docking mechanism gear.
The motor position sensor is integrated into the system board. To replace
the motor position sensor, the system board must be replaced.
Ethernet Controller
The expansion base has an integrated Ethernet controller that provides
network support with an AUI connector and an RJ-45 connector (Section 6.5).
The RJ-45 connector connects to 10BASE-T networks. The AUI connector
connects to 10BASE5 networks or (with an optional Thinnet Coax Transceiver)
to 10BASE2 networks. There is full +12V support on the AUI connector.
SCSI-2 Controller
The expansion base has an integrated SCSI-2 controller with active SCSI-2
termination on the SCSI-2 bus. The expansion base has an internal and
external SCSI-2 connector (Section 6.5).
Battery Charger 
						

							The battery charger [1] (Figure 6-8), controlled by the system board,
charges a Compaq LTE Elite spare battery pack. The battery charger operates
whenever the expansion base is connected to an electrical outlet, whether
the expansion base is on or off. In addition to charging the spare battery
pack in the battery charger, the expansion base simultaneously charges the
battery pack in the docked computer, whether the system is on or off.
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