Acer Travelmate 420 Service Guide

Chapter 13
System Block Diagram
SPR
Conn.
Audio DJ    
O2 163
W320-04
Touch Pad
3.3V 33MHz
BIOS
uFCBGA/uFCPGA CPU
HA#(3..31)
1.8V 266MHz
1394
System Bus
USB conn X3
MAX6654MEE
CardBus ControllerTI TSB43AB22
SD/MMC
 CARD
3.3V ATA100
HD#(0..63)
421 BGA
400MHz
Clock Generator
Thermal Sensor
HUB Link 845MP     625 BGA
Memory
BUS(DDR)
LPC BUS
SO-DIMM X2
MDC
AGP4X(1.5V)
HDD Connector
CRT Connector
FIR
O2 6912
LAN
Kinnereth
DC/DC Interface
Suspend
SMsC
LPC47N227
Mini PCI
Conn.
CPU Bypass
& CPUVID
Card Reader...

4Chapter 1
Board Layout
Top View
23-JP1 Speaker L connector 39-JP33 Inverter connector
20-JP3 VGA board to B connector 19-JP2 VGA board to B connector
24-JP4 Speaker R connector 22-JP6 SD card connector
21-JP5 Keyboard connector 28-JP12, JP32, JP39 USB port connector
25-JP10 Audio out jack 26-JP9 Audio in jack
30-SW2 BT switch 36-JP11 MDC connector
34-JP7 Touchpad switch PCB
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Chapter 15
Bottom View
15-JP37 Docking connector 13-JP14 VGA port connector
9-JP21 PCMCIA connector 14-JP15 Printer port connector
1-U41 CPU socket 12-JP13 S video port
16-JP22 Main fan connector 17-PCN1 DC jack
4-PCN4 Battery connector 2-JP25 DDR connector
3-JP28 DDR connector 37-JP23 2nd fan connector
35-JP26 Battery connector 5-JP29 Module
6-JP24 Mini PCI connector 7-JP31 HDD connector
31 FIR 41 Wireless LED
33 Battery LED 27-JP34 RJ11
8-JP30 1394 connector 18-SW3 ME Off
32-JP40 Memory stick connector...

6Chapter 1
Outlook View
A general introduction of ports allow you to connect peripheral devices, as you would with a desktop PC. 
Front View
#IconItemDescription
1 Display screen Also called  LCD (liquid-crystal display), 
displays computer output.
2 Power Button Turns on the computer power.
3 Speakers Outputs sound.
4 Keyboard Inputs data into your computer
5 Touchpad Touch-sensitive  pointing device which 
functions like a computer mouse.
6 Click buttons (left,  center and right)The left and right...

Chapter 17
14 Palmrest Comfortable support area for your hands 
when you use the computer.
Outputs sound.
15 Status indicators LEDs (light-emitting diode) that turn on and  off to show the status of the computer, its 
functions and components.
16 Microphone Inputs sounds and voice into your  computer.
17 Launch keys Special keys for launching Internet  browser, E-mail program and frequently 
used programs. Located at the top of the 
keyboard are five buttons. They are 
designated as P1, P2, P3, E-mail...

8Chapter 1
Left Panel
#IconItemDescription
1 Power jack Connects to an AC adapter.
2 Security keylock Connects to a Kensington-compatible  computer security lock.
K
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Chapter 19
Right Panel
 
#IconItemDescription
1 USB port Connects to Universal Serial Bus devices  (e.g., USB mouse, USB camera).
2 Line-in/Mic-in jack Accepts audi o line-in devices (e.g., audio 
CD player, stereo walkman). Selection is 
through the OS Windows mixer.
3 Speaker/Headphone- out jackConnects to audio line-out devices (e.g., 
speakers, headphones)
4 Modem jack Connects to a phone line
5 IEEE 1394 port Connects to an IEEE 1394 device.
6 PC card eject buttons Eject the PC Card from the slot.
7...

10Chapter 1
Rear Panel
#IconItemDescription
1 Expansion port I/O replicator or EasyPort expansion  devices.
2 External display port Connects to  a display device (e.g., external 
monitor, LCD projector).
3 Parallel port Connects to a parallel device (e.g., parallel  printer).
4 S-video Connects t a television or display device  with S-video input.
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Chapter 111
Bottom Panel
#IconItemDescription
1 Battery bay Houses the computer’s battery pack.
2 Battery  release  latches Unlatches the battery to remove the battery  pack.
3 Memory compartment Houses the computer’s main memory.
4 Cooling fan Helps keep the computer cool.  Note: Don’t cover or obstruct the opening 
of the fan.
5 AcerMedia drive bay  release latchlatches the AcerMedia bay to remove the 
optical diskette drive.
6 Hard disk bay Houses the computer’s hard disk.
SG_TM420_Ch1.fm  Page 11...

12Chapter 1
Indicators
The computer has seven easy-to-read status icons below the display screen.
The status LCD displays icons that show the  status of the computer and its components.
IconFunctionDescription
Power Lights green when the computer is on.  Flashes when the computer is in low 
power.
Sleep Flashes when the computer enters Sleep  mode. Lights when the computer is in 
Sleep mode.
Battery charge Lights green when the battery is being  charged. 
Wireless 
communication Lights when the Wireless...