Acer Travelmate 420 Service Guide

Chapter 363
Disassembly Procedure Flowchart
The flowchart on the succeeding page gives you a graphic representation on the entire disassembly sequence 
and instructs you on the components that need to be removed during servicing.  For example, if you want to 
remove the system board, you must first remove the keyboard, then disassemble the inside assembly frame in 
that order.   
Start
Battery
RAM DoorHDD ModuleHinge CapsODD module
MemoryAx2
Bx2ODD
HolderODD
Assembly
Fx4
Ex2
ODD DoorODD PCB
BoardODD...

64Chapter 3
  
Screw List
ItemDescription
A SCREW M2.5X0.45+4A-BNI
B SAFETY SCREW M2.5X0.45+6FP-ZK(NL)
C SCREW M2.5X0.45+10FP-ZK(NL)
D SCREW M2.5X0.45+16FP-ZK (NL)
E SCREW M2.0X4FP-ZK(H3.5-3.8XT0.6)
F SCREW M2.5X0.45P+3K-ZK(NL)
G SCREW M2.0X0.4P+2.3FP-ZK
H SCREW M3.0X0.8+3K-NL
I THERMAL SCREW (Front)
J SCREW M2.0X0.4P+3FP-NI
Main Unit
Bx1
Dx9
Cx5
Lower Case
Mini PCI
Wireless CardThermal
Module
Ix2
Ox2
CPU
Main Board
AssemblyUpper Case
Assembly Ax2
Bx4
I/O Bracket
Main FrameMain Board
Ax2
MDC CableMDC...

Chapter 365
Removing the Battery Pack
1.Slide the battery latch as the picture shows.
2.Then remove the battery.
 
 
TM420.book  Page 65  Monday, September 23, 2002  10:27 AM 

66Chapter 3
Removing the Optical Module/HDD Module and Memory
Removing the Optical Module
1.Slide the optical drive latch.
2.Then remove the optical drive.
Removing the HDD module
1.Unscrew the two screws that secure the hard disk drive door.
2.Remove the hard disk drive module.
Removing the Memory
1.Remove the two screw that secures the RAM door.
2.Remove the RAM door.
3.Prize the retaining clips with fingers. Then remove the memory..
TM420.book  Page 66  Monday, September 23, 2002  10:27 AM 

Chapter 367
Removing the Keyboard/ LCD Module and VGA Board
Removing the Keyboard
1.Remove the two screws holding the hinge caps then remove the hinge caps.
2. Unscrew the four screws holding the keyboard.
3. Use a tool to press the keyboard lock latch on the right and the left side.
4. Turn over the keyboard as the picture shows.
5. Disconnect keyboard FFC then remove the keyboard.
6. Then detach the middle cover carefully.
Removing the LCD  module and VGA Board
1.See “Removing the Keyboard” on page...

68Chapter 3
6.Then disconnect the VGA board connector.
7.Tilt the LCD module to 90 degree from the main unit.
8.Remove the LCD module from the main unit.
9.Detach the mylar that fastens then take the cable out of VGA shielding notch. 
10.Disconnect the LCD coaxial cable from the VGA board. 
11 .Remove the VGA shielding from the VGA board.
TM420.book  Page 68  Monday, September 23, 2002  10:27 AM 

Chapter 369
Disassembling the Main Unit
1.See “Removing the Keyboard/ LCD Module and VGA Board” on page 67
2.Disconnect the left and the right speaker cable.
3.Disconnect the touchpad FFC.
4.Remove the 12 screws on the lower case.
5.Then detach the lower case from the main unit.
6.Disconnect the antenna line connectors that connects to the mini PCI wireless card.
7.Release the mini PCI wireless card lock with the fingers then remove it.
8.Unscrew the four screws that fasten the thremal module.
9.Remove...

70Chapter 3
10.Release the CPU lock.
11 .Remove the CPU from the main unit carefully.
12.Tear off the tape that fastens the antenna line to the main board. Then take the antenna line out from the 
other side.
 
13.Remove the screw here.
14.Unscrew the screw as shown here.
15.Then remove the main board assembly from the lower case.
16.Unscrew the four screw nuts that secure the I/O bracket.
17.Remove the screw on the main frame.
18.Disconnect one fan connector.
19.Disconnect another fan connector....

Chapter 371
22.Unscrew the two screws holding the main board to the main frame.
23.Remove main board from the main frame.
24.Remove the two screws holding the MDC card.
25.Disconnect the MDC card connector and modem wire. Then remove the MDC card.
26.Use a tool to release the MDC cable lock.
27.Then remove the MDC cable.
28.Remove the three holding the support bracket.
29.Remove the support bracket.
.
30.Unscrew the three screws that secure the upper case shielding.
31.Then remove the upper case...

72Chapter 3
33.Release the tape that fasten touchpad button board FFC. Then disconnect the FFC connecting to 
touchpad button board.
34.Unscrew the two screws that secure the CD player board.
35.Take the CD player board off the lower case.
36.Remove the two screws holding CD-player button and CD-player support.
37.Remove the CD-player button.
38.Press the CD-player support latch.
39.Then remove the CD-player support.
.
40.Disconnect the FFC on the CD-player button.
41.Disconnect the FFC that connects to...