compaq lte elite User Manual

9.17 Cable Harnesses And PCMCIA Card Sensor 
This section covers removal and replacement procedures for the cable
harnesses and the PCMCIA card sensor. Refer to Section 6.6 for more
information about the cable harnesses and the PCMCIA card sensor. 

1. Harness extension cable
2. Keylock switch
3. Eject switch cable harness
4. Eject switch
5. PCMCIA card sensor emitter
6. PCMCIA card sensor receiver
7. Power switch cable harness
8. Power switch
NOTE: Refer to Section 9.18 for removal and replacement procedures for
power switch and the eject switch components.
Power Switch Cable Harness
To remove the power switch cable harness, complete the following steps:
1. Remove the bottom cover (Section 9.6).
2. Remove the drive if one is installed in the drive...

4. Remove the power switch screw (Figure 9-38).
IMPORTANT: The power switch screw is also used to attach one of the
horizontal guides. When replacing the power switch, be sure
the horizontal guide is still properly aligned
(Section 9.19).
5. Remove the power switch from the top cover (Figure 9-38).
IMPORTANT: If the power switch does not come out easily, the LED light
pipes may be catching on the top cover. If this happens,
press firmly on the light pipes while removing the switch to
allow the light...

7. Remove the screws from the PCMCIA card sensor emitter and receiver
frames (Figure 9-40).
8. Remove the receiver [1] and disconnect its cable [2] (Figure 9-40).
9. Remove the emitter [3] and disconnect its cable [4] (Figure 9-40). 

IMPORTANT: When replacing the power switch cable harness, ensure that it is
routed correctly. There are two types of cable harnesses: the
type wrapped with tape and the type wrapped with tie wraps. The
routing depends on which type of cable harness is being used.
The type that is wrapped with tape should be routed underneath
the drive cage, while the type wrapped with tie wraps should be
routed behind the drive cage. (If the tie wrapped type is routed
underneath the drive cage, it could interfere with...

IMPORTANT: When replacing the power switch cable harness, ensure that the
cable harness is reconnected to the harness extension cable or
the computer cannot dock properly. Ensure that the cable lock on
the harness extension cable snaps back into place.
11. Remove the power switch cable harness (Figure 9-42). 

PCMCIA Card Sensor (Emitter and Receiver)
The PCMCIA card sensor is a light curtain type and is composed of emitter
and receiver boards that are housed in individual frames. The receiver is
located toward the front of the expansion base [1] while the emitter is
located toward the rear [2] (Figure 9-43). 

The emitter and receiver are similar in appearance. To tell them apart
easily, note that the receiver frame has one small hole [1] and the emitter
frame has two small holes [2] (Figure 9-44). The single hole in the
receiver frame corresponds with a single infra-red component on the
receiver board while the two holes in the emitter frame correspond with two
LEDs on the emitter board. 

NOTE: The small holes in the emitter and receiver frames may become blocked
with debris that interferes with their operation. Before replacing
the emitter and receiver, ensure that the holes are free of debris.
To remove the PCMCIA card sensor emitter and receiver, complete the
following steps:
1. Complete steps 1 through 9 as listed in Power Switch Cable Harness in
this section to remove the emitter and receiver from the top cover.
2. To remove the emitter and receiver boards from their frames, gently...

IMPORTANT: When replacing the emitter board in its frame, it is possible to
install it backwards. To connect the emitter board to the power
switch cable harness, ensure that the connector on the board
faces the outside of the expansion base.
Eject Switch Cable Harness
To remove the eject switch cable harness, complete the following steps:
1. Remove the bottom cover (Section 9.6).
2. Remove the drive if one is installed in the drive cage above the eject
switch (Section 9.15).
3. Remove the drive cage...