Screw Identification And Tightening; Zif Connectors - Dell Inspiron 3800 System Reference Manual

Power Sources: Dell Inspiron 3800 System Reference

Screw Identification and Tightening

The illustrations in the following removal procedures provide the correct screw length as part of the screw's label.
A graphic for that length screw is also included in the illustration. Examples are shown in
the graphic in the illustration to check for correct length.
Figure 3. Screw Identification
NOTICE: When reinstalling a screw, you must use a screw of the correct diameter and length. Otherwise, hardware
damage could result. Make sure that the screw is properly aligned with its corresponding hole, and avoid over
tightening.
When you are removing and replacing components, photocopy the Table 1 placement mat as a tool to lay out and keep
track of the component screws.
Table 1. Screw Placement Mat With Component Screw Counts and Sizes
Hard-Disk Drive:
M3 x 5 (1 each)
Display Assembly Bezel:
Rubber screw
covers (4 each)
Plastic screw
covers (2 each)
12.1-Inch Display
Assembly LCD to
Top Cover:
M3 x 5 (4 each)
System Board:
M2.5 x 4 (2 each)

ZIF Connectors

Some of the computer's interface connectors are zero insertion force (ZIF) connectors. These connectors are not
removable, but they must be released to disconnect a cable from them (see Figure 4).
Figure 4. Disconnecting an Interface Cable
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Keyboard
Assembly:
M2.5 x 10 (7 each)
Display Assembly Bezel:
M2.5 x 4 (6 each)
12.1-Inch Display
Assembly Inverter:
M3 x 3 (3 each)
Microprocessor Shield:
(three captive and
two removable screws)
M2 x 3 (2 each)
Display Assembly:
M2.5 x 4 (3 each)
14.1 Display
Assembly LCD to Top Cover:
M2 x 3 (6 each)
Palmrest Assembly:
M2.5 x 20 (5 each)
TCA and
Exhaust Fan:
M2.5 x 4 (2 each)
Figure 3. Match the actual screw to