compaq lte elite User Manual
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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).](http://img.usermanuals.tech/thumb/1258/38935/w64_compaq-lte-elite-286.png "Page 287
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).")
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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.](http://img.usermanuals.tech/thumb/1258/38935/w64_compaq-lte-elite-287.png "Page 288
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.")
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Keylock Switch
The keylock switch is integrated into the eject switch cable harness. To
replace the keylock switch, the eject switch cable harness must be replaced
(refer to Eject Switch Cable Harness above).
Harness Extension Cable
The harness extension cable [1] connects the system board to the power
switch cable harness [7] and the eject switch cable harness [3] (Figure
9-37). To remove the harness extension cable, follow the procedures for
removing the system board (Section 9.13).
9.18 Power And...](http://img.usermanuals.tech/thumb/1258/38935/w64_compaq-lte-elite-294.png "Page 295
Keylock Switch
The keylock switch is integrated into the eject switch cable harness. To
replace the keylock switch, the eject switch cable harness must be replaced
(refer to Eject Switch Cable Harness above).
Harness Extension Cable
The harness extension cable [1] connects the system board to the power
switch cable harness [7] and the eject switch cable harness [3] (Figure
9-37). To remove the harness extension cable, follow the procedures for
removing the system board (Section 9.13).
9.18 Power And...")
5. Remove the eject switch from the top cover (Figure 9-46). IMPORTANT: If the eject switch does not come out easily, the LED light pipe may be catching on the top cover. If this happens, press firmly on the light pipe while removing the switch to allow the light pipe to clear the top cover. 6. Remove the two screws that attach the metal keylock plate to the top cover and remove the keylock plate (Figure 9-47).
7. Remove the keylock switch (Figure 9-48). IMPORTANT: When replacing the keylock switch, it is possible to install it upside down. Ensure that the switch actuator faces the outside of the expansion base or the switch cannot function (Figure 9-48).
IMPORTANT: When replacing the eject switch cable harness, ensure that the cable harness is reconnected to the harness extension cable or the computer cannot undock properly. Ensure that the cable lock on the harness extension cable snaps back into place. 9. Remove the eject switch cable harness (Figure 9-50).
Keylock Switch The keylock switch is integrated into the eject switch cable harness. To replace the keylock switch, the eject switch cable harness must be replaced (refer to Eject Switch Cable Harness above). Harness Extension Cable The harness extension cable [1] connects the system board to the power switch cable harness [7] and the eject switch cable harness [3] (Figure 9-37). To remove the harness extension cable, follow the procedures for removing the system board (Section 9.13). 9.18 Power And Eject Switch Components This section covers removal and replacement procedures for the power and eject switch components. The components include the following: o Switch frames o Light pipes (for LEDs mounted on the switch boards) o Switch springs and buttons The switch frames, light pipes, and springs are interchangeable. The switch
buttons are not interchangeable. The switch components are available in the Miscellaneous Small Mechanical Parts Kit (Table 8-8). NOTE: The power and eject switch boards are integrated into the power and eject switch cable harnesses. To replace the switch boards, the cable harnesses must be replaced (Section 9.17). To remove the switch components, complete the following steps: 1. Remove the power switch by completing steps 1 through 5 as listed in Power Switch Cable Harness in Section 9.17. 2. Remove the eject switch by completing steps 1 through 5 as listed in Eject Switch Cable Harness in Section 9.17. 3. Remove the clear plastic light pipe(s) by sliding them out of the switch. NOTE: The power switch has two light pipes and the eject switch has one. IMPORTANT: When replacing the light pipe(s), be sure that the textured ends are facing out. 4. Simultaneously press the two release buttons on the switch and remove the switch button and spring (Figure 9-51).
5. Slide the switch board out of the switch frame (Figure 9-52).
9.19 Horizontal Guides And Springs The expansion base has two horizontal guides and springs: one located under the power switch (the power switch side) and one located under the eject switch (the eject switch side). The horizontal guides and springs are interchangeable and the procedures for removing them are the same for both sides. However, the procedures for replacing each side are slightly different. Removing the Horizontal Guides and Springs To remove the horizontal guides and springs, complete the following steps: 1. Remove the bottom cover (Section 9.6). 2. Remove any installed drives and drive bezels (Section 9.15). 3. Remove the drive cages (Section 9.16). 4. Remove the screws that attach the power switch and the eject switch to the top cover (Figure 9-53). 5. Remove the eject switch [1] and the power switch [2] from the top cover (Figure 9-53).
NOTE: The eject switch and the power switch are still attached to their cable harnesses. 6. Remove the horizontal guides and springs (Figure 9-54).
Replacing the Horizontal Guides and Springs NOTE: One of the legs on each spring is straight and the other leg is bent. Eject Switch Side To replace the horizontal guide and spring for the eject switch side, complete the following steps: 1. Position the spring so that the legs of the spring are on the top [1] (Figure 9-55). 2. With the curved surface of the horizontal guide [2] facing right, place the spring post of the horizontal guide [3] in the coil of the spring [4]. Ensure that both legs of the spring are to the left of the horizontal guide (Figure 9-55).