Acer Travelmate 7300 Service Guide

1-38Service Guide
1.6.22  Hard Disk Drive
Table 1-33 Hard Disk Drive Specifications
ItemSpecification
Vendor & Model Name IBM DTCA-23240 IBM DTCA-24090
Drive Format
Capacity (GB) 4.09 3.24
Bytes per sector 512 512
Logical heads 16 16
Logical sectors 63 63
Logical cylinders 6304 7944
Physical read/write heads 4
Disks 2
Rotational speed (RPM) 4000 4000
Performance Specifications
Buffer size (KB) 512 512
Interface ATA-2 ATA-2
Data transfer rate (disk-buffer, Mbytes/s) 6.47 ~ 10.45 6.47 ~ 10.45
Data transfer...

System Introduction1-39
1.6.24 Battery
Table 1-35 Battery Specifications
ItemSpecification
Vendor & Model Name Sony BTP-S31
Battery Gauge Yes
Battery type Li-Ion
Cell capacity 2700mAH
Cell voltage 3.6V
Number of battery cell 6-Cell
Package configuration 3 serial, 2 parallel
Package voltage 10.8V
Package capacity 58.3WH
Second battery No
1.6.25 DC-DC Converter
DC-DC converter generates multiple DC voltage level for whole system unit use, and offer charge
current to battery.
Table 1-36 DC-DC Converter...

1-40Service Guide
1.6.26 DC-AC Inverter
DC-AC inverter is used to generate very high AC voltage, then supply to LCD CCFT backlight use.
The DC-AC inverter area should be void to touch while the system unit is turned on.
Table 1-37 DC-AC Inverter Specifications
ItemSpecification
Vendor & Model Name Ambit T62-055.C.00 Ambit T62-088.C.00
Used LCD typeIBM ITSV50D (12.1” TFT) LG LP133X1 (13.3” TFT)
Input voltage (V) 7 ~ 19 7 ~ 19
Output voltage (Vrms, with load) 650 (typ.) 650 (typ.)
Output current (mArms,...

System Introduction1-41
1.7  System Block Diagrams
1.7.1  System Functional Block Diagram
“7100” System Block Diagram
MAIN BOARD.  Intel Tillamook/Deschutes MMO   
.  PCI IDE
.  Intel 430TX Core Logic chipset    
.  NS87338 Super I/O controller
.  512KB L2 cache memory   
.  256KB PMU/System/Video BIOS
.  32~128MB EDO/SDRAM memory   
.  6832 CardBus chip
.  NeoMagic NMG4 VGA chip   
.  IBM IrDA/FIR
.  2MB video memory   
.  DMI 2.0 with Intel LDCM
Ext. Keyboard
 or  PS/2 Mouse
 6-pin
       25-pin15-pin...

1-42Service Guide
1.7.2  System Bus Block Diagram
970T SYSTEM BLOCK DIAGRAM
440BX
SYSTEM
 CONTROLLER
HOST BUS
L2 CACHE
32KX32 MD[0..63]
MA[0..13] SDRAM
2, 4, 8MX64
2 BANKS
DIMCLK(60/66MHz)PCI BUS
14.318MHzINTEL
 CPU
CLOCK
 GEN.
 IMICS651HCLK(60/66MHz)
PCICLK(30/33MHz)
USB(48MHz)
IDE
CDPIIX4
PCI TO EIO BRG
   IDE,USB, RTCUSB VIDEO CTRL
     NM2160 CARDBUS
 CTRL
 PD6832 
ZVDOCKING
10 Mbps
Ethernet
CRT LCD EIO BUS
16 MHz
SMC
 83C55224 MHz
14.318MHz
KBC
80C51SLFlash
BIOSAUDIO
NMA1SUPER I/O
   NS97338
RTC...

System Introduction1-43
1.8 Environmental Requirements
Table 1-39 Environmental Requirements
ItemSpecification
Temperature
Operating (ºC) +5 ~ +35
Non-operating(ºC)(unpacked) -10 ~ +60
Non-operating(ºC)(storage package) -20 ~ +60
Humidity
Operating (non-condensing) 20% ~ 80%
Non-operating (non-condensing)
(unpacked)20% ~ 80%
Non-operating (non-condensing) (storage
package)20% ~ 90%
Operating Vibration (sine mode)
Operating 5 -25.6Hz, 0.38mm;  25.6 -250Hz, 0.5G
Sweep rate > 1 minute / octave
Number of...

1-44Service Guide
1.9 Mechanical Specifications
Table 1-40 Mechanical Specifications
ItemSpecification
Weight (includes battery and FDD)
   12.1 TFT SVGA LCD and 12.5mm HDD
   Adapter3.3 kgs (7.2 lbs)
230 g (0.52 lb)
Dimensions
   round contour
   main footprint297~313mm x 233~240mm x 50~53mm
11.7” x 9.1” x 2” 

&KDSWHU &KDSWHU
Major Chips Description
Major Chips Description 2-1
This chapter discusses the major components.
2.1  Major Component List
Table 2-1 Major Chips List
ComponentVendorDescription
PIIX4(82371AB) Intel South Bridge
NM2160 NeoMagic Flat Panel Video Accelerator
NMA1 NeoMagic Audio chip
87C552 Philips Single-chip 8-bit controller for SMC
(System Management Controller)
NS97338 NS (National Semiconductor) Super I/O controller
CL-PD6832 Cirrus Logic...

2-2Service Guide
2.2  Intel PIIX4
PIIX4 is a multi-function PCI device that integrates many system-level functions.
PCI to ISA/EIO Bridge
PIIX4 is compatible with the PCI Rev 2.1 specification, as well as the IEEE 996 specification for the
ISA (AT) bus. On PCI, PIIX4 operates as a master for various internal modules, such as the USB
controller, DMA controller, IDE bus master controller, distributed DMA masters, and on behalf of ISA
masters. PIIX4 operates as a slave for its internal registers or for...

Major Chips Description 2-3
The timer/counter block contains three counters that are equivalent in function to those found in one
82C54 programmable interval timer. These three counters are combined to provide the system timer
function, refresh request, and speaker tone. The 14.31818-MHz oscillator input provides the clock
source for these three counters.
PIIX4 provides an ISA-Compatible interrupt controller that incorporates the functionality of two
82C59 interrupt controllers. The two interrupt...