Disassembly Tools; Stages Of The Disassembly Process; Equivalent Torque Values; System Disassembly - Acer Extensa 4120 Service Manual

System Disassembly

This chapter provides step-by-step instructions on how to disassemble the notebook computer for
maintenance and troubleshooting purposes.

Disassembly Tools

In performing the disassembly process, you will need the following tools:
Wrist-grounding strap and conductive mat for preventing electrostatic discharge
Philips screwdriver
Flat screwdriver
Hex screwdriver
Flat plastic screwdriver
Plastic tweezers

Stages of the Disassembly Process

The disassembly process is divided into three stages:
1. External modules disassembly
2. Main unit disassembly
a. Upper case disassembly
b. Lower case disassembly
3. LDC module disassembly
IMPORTANT: The disassembly procedure described in this chapter is a gradual process, as illustrated in the
flowcharts preceding each disassembly stage section. This means that users need to observe
the instructions in a step-by step manner. To illustrate, removing the HDD assembly will require
that you first remove the battery pack and the stylus. Failure to observe the gradual flow of the
process may result in component damage.
NOTE: To reinstall the system components and assemble the unit, perform the disassembly procedures
in reverse.

Equivalent Torque Values

Torque values indicated in this chapter are expressed in kgf-cm (kilogram force-centimetre). For equivalent
values in in-lb (inch-pound force) and Nmm (milli Newton meter), refer to the table below.
Torque Units
1.6
Torque
3
values
4

Chapter 3

kgf-cm in-lb
1.39
2.60
3.47
Nmm
156.91
294.21
392.28
Chapter 3
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