Page 36 from 143
Acer TM 4520 SG.book Page 26 Friday, June 22, 2007 5:43 PM
Page 37 from 143
This chapter provides step-by-step instructions on how to disassemble the notebook computer for
maintenance and troubleshooting purposes.
In performing the disassembly process, you will need the following tools:
TWrist-grounding strap and conductive mat for preventing electrostatic discharge
TFlat plastic screwdriver
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
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.
To r q u e
values1.6 1.39 156.91
Acer TM 4520 SG.book Page 27 Friday, June 22, 2007 5:43 PM
Page 38 from 143
System Screw List
Listed below are the screw types used in this system, plus their corresponding part numbers.
NOTE: The screws for the different components vary in size. During the disassembly process, group the
screws with their corresponding components to avoid mismatches when putting back the components.
Before proceeding with the disassembly procedure, perform the steps listed below:
1.Turn off the power to the computer and all peripherals.
2.Unplug the power cord from the computer.
3.Unplug all peripheral cables from the computer.
4.Close the notebook lid and place the computer on a flat, steady surface.
ScrewTy p eColorPart Number
AM2 x L8 BZN+NYLOK Black 86.00D75.220
BM2 x L4 BZN Black 86.00A02.140
CM2.5 x L8 BZN+NYLOK Black 86.00E34.738
DM2 x L4 BZN+NYLOK Black 86.00E13.524
EM3 x L4 Silver 86.9A554.4R0
FM2 x L3 BZN+NYLOK Black 86.00E25.723
GM2 x L2.5 BZN+NYLOK Black 86.00D72.620
HM2.5 x L12 BZN+NYLOK Silver 86.00E67.63C
IM2.5 x L4 BZN+NYLOK Black 86.00D30.630
JM2.5 x L6 BZN+NYLOK Black 86.00E33.736
KM2 X L2 NI Silver 86.00D77.320
LM2.5 x L5 BZN+NYLOK Black 86.00F19.735
MM2.5 x L3 BZN+NYLOK Black 86.00D52.630
Acer TM 4520 SG.book Page 28 Friday, June 22, 2007 5:43 PM
Page 39 from 143
External Modules Disassembly
External Modules Disassembly Flowchart
ScrewTy p ePart Number
A M2 x L8 BZN+NYLOK 86.00D75.220
B M2 x L4 BZN 86.00A02.140
C M2.5 x L8 BZN+NYLOK 86.00E34.738
D M2 x L4 BZN+NYLOK 86.00E13.524
E M3 x L4 86.9A554.4R0
F M2 x L3 BZN+NYLOK 86.00E25.723
G M2 x L2.5 BZN+NYLOK 86.00D72.620
S D dummy cardEXpressCard
dummy cardBa tte r y pa c kL-case cover
(Ax1, Bx7, Cx1)
DIM MWLAN board
(Dx2)HDD a s s e m bl y
Ha r d dr i ve
Ha r d dr i ve
ODD a s s e m bl y
ODD br a c ke t
ODD m o dul e
He a t s i nk
Acer TM 4520 SG.book Page 29 Friday, June 22, 2007 5:43 PM
Page 40 from 143
Removing the SD Dummy Card
1.Push against the card, as if you were pushing it further into the slot, letting the card spring out.
2.Pull the SD dummy card out of its slot.
Removing the PC Card Dummy Card
1.Press the PC card slot eject button to pop it out, then press it again to eject the dummy card.
Acer TM 4520 SG.book Page 30 Friday, June 22, 2007 5:43 PM