MiTAC 7521 N, 7521 B, 7521 Troubleshooting Manual

SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR

7521

TESTING TECHNOLOGY DEPARTMENT / TSSC

：：：：

Jesse .Jan

MAR. 2001

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1. HARDWARE ENGINEERING SPECIFICATION……………………..

2. DEFINITION & LOCATION CONNECTORS/ SWITCHES…………..

3. DEFINITION & LOCATION MAJOR COMPONENTS………………..

4. PIN DESCRIPTIONS OF MAJOR COMPONENTS ……………………

5. SYSTEM VIEW & DISASSEMBLY ……………………………………….

6. MAINTENANCE DIAGNOSTICS………………….………………………

7. TROUBLE SHOOTING …………………………………….……………..

8. SPARE PARTS LIST ……………………………….………………………

9. BLOCK DIAGRAM ………………………………………………………..

10. EXPLODED DRAWING…………………………………………………..

11. CIRCUIT DIAGRAM……………………………………………………...

P.2 P.40 P.44 P.47 P.60 P.84 P.88 P.120 P.128 P.129 P.130

CONTENTS

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1.1 HARDWARE ENGINEERING SPECIFICATION

1.1.1 General Description

This document describes the engineering specification for 7521 portable notebook computer system.

1.1.2 System Overview

The 7521 model motherboard will accept Intel Pentium III and Celeron processor with FC-PGA packaged. Which will supports the different levels of Pentium III CPU with FC-PGA package. Those are Pentium III 600/650/700/750/800 MHz, and Celeron 600/633/667/700/733 MHz .

This system is based on PCI architecture and is fully compatible with IBM PC/AT specification, which have standard hardware peripheral interface and support Intel Pentium III with FC-PGA package. The power management complies with Advanced Configuration and Power Interface (ACPI) 1.0. It also provides easy configuration through CMOS setup, which is built in system BIOS software and can be pop-up by pressing F2 at system start up or warm reset. System also provides icon LEDs to display system status, such as AC Power indicator, FDD, HDD, NUM LOCK, CAP LOCK, SCROLL LOCK, SUSPEND MODE and battery present, capacity & charging status. It also equipped with LAN, FIR, USB port, 3D stereo audio functions.

The memory subsystem supports 64MB on board SDRAM, one 144pin DIMM socket for upgrading up to 192 MB of DRAM using SDRAM DIMM module.

The SiS 630 integrates the north bridge chip, super south bridge and the real 128-bit 3D graphics accelerator all into one single chip. It provides 10/100M Fast Ethernet, 3D Positional Audio, Advance H/W DVD playback and 2D/3D graphics engine.

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The TI 1225 cardbus controller supports PCMCIA and CARDBUS. The National Semiconductor PC97338 Super I/O controller integrates the standard PC I/O functions: floppy interface, two FIFO serial ports, one EPP/ECP capable parallel port, and support for an IrDA 1.1, 1.0 and sharp ASK compatible infrared interface. To provide for the increasing number of multimedia applications, an CODEC CS4299 is integrated onto the motherboard which support 16-bit stereo, Sound Blaster Pro, Windows Sound System compatibility, and full-duplex capabilities to meet the demands of interactive multimedia applications

A full set of software drivers and utilities are available to allow advanced operating systems such as Windows 95 or Windows 98 to take full advantage of the hardware capabilities. Features such as bus mastering IDE, Windows 95ready Plug and Play, Advanced Power Management (APM) with application restart, software-controlled power shutdown..

1.2 Hardware System

1.2.1 System parts

• Central Processing Unite : using Intel Pentium ! or Celeron microprocessors in FC-PGA packaged.

• Synthesizer : ICS9248-102.

• SiS 630 : CPU/ PCI and CPU/AGP bridge with memory controller/LAN/IDE/USB/PMU controller.

• Super I/O Controller : NS PC 97338VJG.

• PCMCIA Interface Controller : TI 1225.

• Keyboard System : Hitachi H8 (3434F) universal keyboard controller.

• 3D Audio System : CRYSTAL CS 4299 CODEC.

• FIR port : HP HSDL-3600#007 FIR module.

• FAX/ MODEM : ASKEY 56Kbps Fax MODEM, software Modem (Option) .

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1.2.2 CPU MODULE

• Intel Pentium !/ Celeron Processors with 370 pins PGA package.

• Pentium ! 600/650/700/750/800 MHz, FC-PGA package at FSB 100MHz.

• Celeron 600/ 633/ 667/ 700/ 733 MHz, FC-PGA package.

1.2.3 Synthesizer

• System frequency synthesizer : ICS9248-102

- Maximized EMI suppression using Integrate Circuit System’s spread spectrum technology.

- Three copies of CPU output, output to output skew between them within 175ps and seven copies of PCI output, output to output skew between them 500ps, fourteen copies of SDRAM output, output to output skew between them within 250ps.

- One 48MHz outout for USB and selectable 24/48 MHz output ( pin25 ).

- Two buffer copies of 14.318MHz input reference signal.

- Supports up to 166MHz CPU or SDRAM operation.

- Supports two SDRAM DIMMS.

- Ideal for high performance Desktop/ Notebook designed using SIS630 chip set.

- I²C serial configuration interface.

1.2.4 SiS630 Slot 1/Socke t 37 0 2D/3D Ultra-AGP™ Single Chipset

The single chipset SiS630, provide a high performance/ low cost Desktop soloution for the Intel Slot 1 and socket 370 series CPUs based system by integrated a high performance North Bridge, advanced hardware 2D/3D GUI engine and Super-South bridge. In addition. SiS630 provides system-on-chip solution that complies with Easy PC Initiative which supports instantly

Available OnNow PC technology, USB, Legacy Removal and Slotless Design and FlexATX form factor.

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By integrating the UltraAGP™ technology and advanced 128-bit graphic display interface, SiS630 delivers AGP 4x-like performance and up to 2 GB/s memory bandwidth. Furthermore, SiS630 provides powerful hardware decoding DVD accelerator to improve the DVD playback performance. In addition to providing the standard interface for CRT monitors, SiS630 also

provides the Digital Flat Panel Port (DFP) for a standard interface between a personal computer and a digital flat panel monitor. To extend functionality and flexibility, SiS also provides the ?Video Bridge?(SiS301) to support the NTSC/PAL Video Output, Digital LCD Monitor and Secondary CRT Monitor, which reduces the external Panel Link transmitter and TV-Out encoder

for cost effected solution. SiS630 also adopts Share System Memory Architecture which can flexibly utilize the frame buffer size up to 64MB.

The “Super-South Bridge” in SiS630 integrates peripheral controllers / accelerators / interfaces. SiS630 provides a total communication solution including 10/100Mb Fast Ethernet for Office requirement and 1Mb HomePNA for Home Networking. SiS630 offers AC’97 compliant interface that comprises digital audio engine with 3D-hardware accelerator, onchip

sample rate converter, and professional wavetable along with separate modem DMA controller. SiS630 also provides interface to Low Pin Count (LPC) operating at 33 MHz clock which is the same as PCI clock on the host, and dual USB host controller with five USB ports that deliver better connectivity and 2 x 12Mb bandwidth.

The built-in fast PCI IDE controller supports the ATA PIO/DMA, and the Ultra DMA33/66 function that supports the data transfer rate up to 66 MB/s. It provides the separate data path for two IDE channels that can eminently improve the performance under the multi-tasking environment.

Features

Host Interface Controller

 Supports Intel Pentium III/Celeron CPU at 100/66MHz Front Side Bus Frequency  Synchronous Host/DRAM Clock Scheme  Asynchronous Host/Dram Clock Scheme

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Integrated DRAM Controller

 3-DIMM/6-Bank of 3.3V SDRAM  Supports NEC Virtual Channel Memory (VC-SDRAM) Technology  Supports Memory Bus up to 133MHz  System Memory Size up to 1.5GB  Up to 512 MB per Row  Supports 16Mb, 64Mb, 128Mb, 256Mb, 512Mb, SDRAM Technology  Suspend-to-RAM (STR)  Relocatable System Management Memory Region  Programmable Buffer Strength for CS#, DQM[7:0], WE#, RAS#, CAS#, CKE, MA[14:0] and MD[63:0]  Shadow RAM Size from 640KB to 1MB in 16KB incrementss  Two Programmable PCI Hole Areas

Integrated A.G.P. Compliant Target /66Mhz Host-to-PCI Bridge

 AGP v2.0 Compliant  Supports Graphic Window Size from 4MBytes to 256MBytes  Supports Pipelined Process in CPU-to Integrated 3D A.G.P. VGA Access  Supports 8 Way, 16 Entries Page Table Cache for GART to Enhance Integrated A.G.P. VGA Controller Read/Write

Performance

 Supports PCI-to-PCI Bridge Function for Memory Write from 33MHz PCI Bus to Integrated A.G.P. VGA

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Meet PC99 Requirements PCI 2.2 Specification Compliant High Performance PCI Arbiter

 Supports up o 4 PCI Masters  Rotating Priority Arbitration Scheme  Advanced Arbitration Scheme Minimizing Arbitration Overhead  Guaranteed Minimum Access Time for CPU and PCI Masters

Integrated Host-to-PCI Bridge

 Zero Wait State Burst Cycles  CPU-to-PCI Pipeline Access  256B to 4KB PCI Burst Length for PCI Masters  PCI Master Initiated Graphical Texture Write Cycles Re-mapping  Reassembles PCI Burst Data Size into Optimized Block Size

Fast PCI IDE Master/Slave Controller

 Supports PCI Bus Mastering  Native Mode and Compatibility Mode  PIO Mode 0,1,2,3,4  Multiword DMA Mode 0,1,2  Ultra DMA 33/66  Two Independent IDE Channels Each with 16 DW FIFO

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Virtual PCI-to-PCI Bridge Integrated Ultra AGP VGA for Hardware 2D/3D Video/Graphics Accelerators

 Supports Tightly Coupled 64 Bits 100mhz Host Interface to VGA to Speed Up GUI Performance and Video Playback

Frame Rate

 AGP v. 2.0 Compliant  Zero-Wait-State 128x4 Post-Write Buffer with Write Combine Capability  Zero-Wait-State 128x4 2-Way Read Ahead Cache Capability  Re-locatable Memory-Mapped and I/O Address Decoding  Flexible Design Shared Frame Buffer architecture for Display Memory  Shared System Memory Area up to 64MB  Built-in 8K Bytes Texture Cache  32-Bit VLIW Floating-Point Primitive Setup Engine  Peak Polygon Rate : 4M Polygon/Sec@1 Pixel/Polygon With 16bpp, Bilinear Textured, Z Buffered and Alpha Blended  Supports Flat and Ground Shading  Supports High Quality Dithering  Supports Z-Test, Stencil Test, Alpha Test and Scissors Clipping Test  Supports Z Pre-Test for Reducing texture Read Dram Bandwidth  Supports 256 Rops  Supports Individual Z-Buffer and Render Buffer at the same time  Supports 16/24/32 BPP Z Buffer Integrater/Floating Formats

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 Supports 16/32 BPP Render Buffer Foramt  Supports 1/2/4/8 Stencil Format  Supports Per-Pixel Texture/Fog Perspective Correction  Supports MIPMAP with Point-Sampled, Linear, Bi-Linear and Tri-Linear Texture Filtering  Supports Single Pass Two MIPMAP Texture, One Texture on Clock  Supports up to 2048x2048 Texture Size  Supports 2?s Power of Width and height structure rectangular texture  Supports 1/2/4/8 BPP Palletize Texture with 32 Bit ARGB Format  Supports Fogging and Alpha Blending  Supports Hardware Back Face Culling  Supports YUV-to-RGB Color Space Conversion  Supports CD/DVD to TV Playback Mode  Supports DVD Sub-Picture Playback Overlay  Built-in Programmble 24-bits True-Color RAMDAC up to 270 MHz Pixel Clock RAMDAC Snoop Function  Supports VESA Standard Super High Resolution Graphic Modes

- 640x480 16/256/32K/64K/16M colors 120 Hz NI

- 800x600 16/256/32K/64K/16M colors 120 Hz NI

- 1024x768 256/32K/64K/16M colors 120Hz NI

- 1280x1024 256/32K/64K/16M colors 120Hz NI

- 1600x1200 256/32K/64K/16M colors 100Hz NI

- 1920x1200 256/32K/64K/16M colors 80Hz NI

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 Cooperate with "iS Video Bridge ?to support

- NTSC/PAL Video Output

- Digital LCD Monitor

- Secondary CRT Monitor

Low Pin Count Interface

 Forwards PCI I/O and Memory Cycles into LPC bus  Translates 8/16 bit DMA cycles into PCI bus cycles

Advanced PCI H/W Audio & Modem

 Advanced Wavetable Synthesizer  DirectSound™ 3D  Advanced Streaming Architecture  High Quality Audio and AC”97/98 Support  Full Legacy Compatibility  Telephony & Modem  Software support  Meets ACPI 1.0 Requirement  Meets APM 1.2 Requirement  ACPI Sleep States Include S1, S2, S3, S4, S5  CPU Power States Include C0, C1, C2, C3  Power Button with Override

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 RTC Day-of-Month, Month-of-Year Alarm  LED Blinking in S0, S1, S2, S3  PCI Bus Power Management Interface Spec. 1.0

Integrated DMA Controller

 Two 8237A Compatible DMA Controller  8/16 bit DMA data transfer  Distributed DMA Support

Integrated Interrupt Controller

 Two 8237A Compatible DMA Controller  Two 8259A Compatible Interrupt Controllers  Level or Edge Triggered programmable  Serial IRQ  Interrupt Source Re-routable to Any IRQ channel

Three 8254 Compatible Programmable 16-bits counters

 System timer interrupt  Generate refresh request  Speaker output

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Integrated Keyboard Controller

 Supports PS/2 mouse interface  Password security and password power-up  System sleep and power-up by Hot-Key  KBC and PS2 mouse can be individually disabled

Integrated Real Time Clock (RTC) with 256B CMOS SRAM

 Supports ACPI Day-Month and Month-of-Year- Alarm  256 Bytes of CMOS SRAM  Provides RTC H/W Year 2000 Solution

Universal Serial Bus Host Controller

 Open HCI Host Controller with Root Hub  Two USB Host Controller  Five USB Ports  Supports Legacy Devices  Over Current Detection

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I²C Bus/SMBus Series Interface

 Plug and Play Compatible  High-Performance 32-Bit PCI Bus Master Architecture with Integrated Direct Memory  Access (DMA) Controller for Low CPU and Bus utilization  Supports PCI Device ID, Vendor ID / Subsystem ID , Subsystem Vendor ID  Programming through the EEPROM interface  Implements Optional PCI 3.3v Auxiliary Power Source 3.3Vaux Pin and Optional PCI  IEEE 802.3 and 802.3u Standard Compatible  IEEE 802.3u Auto Negotiation and Parallel Detection for Automatic Speed Selection  Full Duplex and Half Duplex Mode for both 10 and 100 Mbps  Fully Compliant Ansi X3.263 Tp-Pmd Physical Sub-Layer which includes adaptive  Single 25mhz Clock for 10 and 100 Mbps Operation  Power Down of 10 base-T/100base-Tx sections when not in use  Supports 10base-Tx, 100base-Tx

1.2.5 Super IO: NS PC 97338VJG

 High speed PC16550A compatible UART with receive/transmit 16 Bytes FIFO programmable serial baud rate generator  Multi-mode parallel port support including standard port, EPP/ECP (IEEE1284 compliant, 2 interrupt pins)  Plug and Play module  FDC, 100% IBM compatible, S/W & register compatible to 82077 with 16Bytes data FIFO Support 3-Mode FDD  FIR/MIR/SIR/SHARP ASK for Infrared application.  COM2

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 IrDA 1.0 / IrDA 1.1 / SHARP ASK

- Baud rate: max. 4Mb

- Link distance: 0.01 to 1 m

- Half angle: #15…⌡ .Βιτ∃Error Rate (BER) : 10

-9

- Peak wavelength: 0.85 - 0.90 mm.

 TQFP 100 pins  Standby mode: control by software

Default configuration :

IO address IRQx DRQx

COM1 3F8-3FF 4 -

FIR/MIR/SIR/ SHARP ASK 278-27F 3 ( COM2 )

PIO 378-37F 7 -

FDD 3F0-3FF 6 2

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1.2.6 PC CARD interface controller: TI1225

 ACPI 1.0 Compliance  PCI Power Management interface specification 1.0 Compliance  Supports distributed DMA (DDMA) and PC/PCI DMA  Advanced submicron, low-power CMOS technology.  Supports two I/O windows and two memory windows available to each cardbus socket.  Supports five PCI memory windows and two I/O windows available to each PC CARD16 socket.  Supports Burst Transfers To Maximize Data Throughput On Both PCI Buses  Provides Serial Interface To TI TPS2202/TPS2206 Dual Slot PC CARD Power Interface Switch  Supports up to 5 general purpose I/O  Multi-Function PCI Device With Separate Configuration Space For Each Socket  Pipelined architecture allows greater than 130Mbps second throughput from cardbus to PCI and from PCI to cardbus.  Support PCI Bus Lock (/LOCK)  3.3-V core logic with universal PCI interface  PCI Local Bus Specification Revision 2.1 compliant  Fully compatible with the Intel 430TX(Mobile Triton II) chipset  1995 PC Card Standard compliant  Supports two 16-bit PC card or Cardbus card; sockets powered at 3.3V or 5V with hot insertion and removal  Provides a serial EEPROM interface for loading the subsystem ID and subsystem vendor ID.  ExCA compatible Registers mapped in memory or I/O space.  Supports ring indicate output, SUSPEND# , and programmable output select for CLKRUN#.

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 Provides socket activity LED signals.  Provides zoom video support signals.  Provides zoom video port function in socket B.  208-Pin LQFP package

1.2.7 DUAL-SLOT PC CARD POWER INTERFACE SWITCH: TPS2206

 Fully Integrated Vcc and Vpp Switching for Dual-Slot PC Card Interface  P 2 C3-Lead Serial Interface Compatible With CardBus Controllers  3.3 V Low-Voltage Mode  Meets PC Card Standards  RESET for System Initialization of PC Cards  12-V Supply Can Be Disabled Except During 12-V Flash Programming  Short Circuit and Thermal Protection  30-Pin SSOP (DB) and 32-Pin TSSOP (DAP)  Compatible With 3.3-V, 5-V and 12-V PC Cards  Lower DS(on) (140-m .5-V Vcc Switch; 110-m .3.3-V Vcc Switch)  Break-Before-Make Switching

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1.2.8 Keyboard system: H8(3434F) universal keyboard controller

 CPU

- Two-way general register configuration

- Eight 16-bit registers or Sixteen 8-bit registers

- High-speed operation

- Maximum clock rate: 16Mhz at 5V

 Memory

- Include 32KB ROM and 1KB RAM

 16-bit free-running timer

- One 16-bit free-running counter

- Two output-compare lines

- Four input capture lines

 8-bit timer (2 channels)

- Each channel has one 8-bit up-counter , two time constant registers

 PWM timer (2 channels)

- Resolution: 1/250

- Duty cycle can be set from 0 to 100%

 I²C bus interface (one channel)

- Include single master mode and slave mode

 Host interface (HIF)

- 8-bit host interface port

- Three host interrupt requests ( HIRQ1,11,12)

- Regular and fast A20 gate output

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 Keyboard controller

- Controls a matrix-scan keyboard by providing a keyboard scan function with wake-up

- Interrupts and sense ports

 A/D converter

- 10-bit resolution

- 8 channels : single or scan mode (selectable )

 D/A converter

- 8-bit resolution

- 2 channels

 Interrupts

- nine external interrupt lines : NMI# , IRQ0 to 7#

- 26 on-chip interrupt sources

 Power-down modes

- Sleep mode

- Software standby mode

- Hardware standby mode

 A single chip microcomputer  On-chip flash memory  Maximum 64-kbyte address space  Support three PS/2 port for external keyboard ,mouse and internal track pad.  Support SMI,SCI trigger input:  Cover switch

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 Battery charging control  Smart Battery monitoring  Control D/D system on/off  Fan control and LED indicator serial interface  100pin TQFP

1.2.9 Memory System

1.2.9.1 Main Memory

 HYUNDAI : GM72V281641AT-7K SDRAM  NEC : UPD45128163G5-A80-9JF SDRAM

- one chip memory size: 4Banksx1Mx16bit SDRAM.

- Standard 54 pin TSOP-II package.

- Power supply: 3 $0.3V

 Supports One JEDEC 144-pin S.O. DIMM sockets on Mother Board for expansion  Supports 3.3V SDRAM  2 banks on one socket.  SDRAM accesses time from clock: 6ns  Memory bus bandwidth: 64 bits

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7521 Supports 64 MB SDRAM on board and one 144pin DIMM socket for upgrading up to 320MB of DRAM .

Here are some main memory system essential characteristics:

- One chip 4Banksx1Mx16bit on board 64 MB

- 144-pin S.O. DIMM socket 1

- Memory Voltage 3.3V $ 10%

- Banks on DIMM Total:2

- Mixed type DRAM Only supports SDRAM

1.2.10 Interface

 Power Supply Jack.  One Standard Parallel Port With ECP/EPP Functions  Supports Two USB port for all USB device.  Supports Macrovision’s TV-OUT connector.(layout only)  Tunable volume by variable resistor .  Two Serial Ports, One For COM1/COM2, The Other For FIR/MIR/SIR/SHARP ASK  One External CRT Connector For CRT Display  One PS/2 Interface For External KB, Mouse Or Other Devices  Two Cardbus Sockets  Cable For Connection Between M/B And Panel.  Cable For Connection Between M/B And Backlight BD.  Headphone Out Jack, Microphone Input Jack And Line In Jack.  One MODEM RJ-11 phone jack for PSTN line and RJ-45 for LAN.

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 Battery translation board connection between M/B and battery.  Quick start buttons translation board (QSB) connection between M/B and five Buttons.  Internet quick start button translation board (IQSB) connection between M/B and touch pad, five LEDs, two Buttons.  FDD-HDD translation board connection between M/B and floppy, hard disk.  One CD-ROM connector on M/B.

1.2.11 Audio System: AC’97 CODEC CS4299

 AC’97 CODEC CS4299 provides a complete high quality audio solution, Feature Include:

- MPU-401 interface

- FM synthesizer

-Game Port

- MIDI port.

- MODEM

- CD-ROM

- User-Defined GPIO

- Volume Control: Rotary VR

 Stereo BTL 2x1 W Amplifiers(TPA0202) With 8 Ohm Load.  CD-ROM IDE Interface  18-bit Stereo ADC & 20-bit Stereo DAC For Record And Play Back  Programmable Sample Rates From 20Hz To 20kHz For Record And Playback  Microphone in * 1 (3.5 mm phone-jack)  Headphone out * 1: stereo (3.5 mm phone-jack and SCMS support)

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 Line in * 1(3.5 mm phone-jack)  Built-in Speaker * 2 (1w, 8 ohm)  Built-in Microphone * 1  Note: For Those Input Source Not Using Should Be Set Mute In Order To Reduce Noise. Like Line In

1.2.12 IR MODULE: HSDL-3600#007

 Fully Compliant to IrDA 1.1 Specifications

- 115.2 kb/s to 4 Mb/s operation

- excellent nose-to-nose operation

 Compatible with ASK, HP-SIR, and TV Remote  IEC825-Class 1 Eye Safe  Wide Operating Voltage Range

- 2.7 V to 5.25 V

 Small Module Size

- 4.0 x 12.2 x 5.1 mm (HxWxD)

 Complete Shutdown

- TXD, RXD, PIN diode

 Low Shutdown Current

- 10 nA typical

 Adjustable Optical Power Management

- Adjustable LED drive-current to maintain link integrity

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 Single Rx Data Output

- FIR Select pin switch to FIR

 Integrated EMI Shield

- Excellent noise immunity

 Edge Detection Input

- Prevents the LED from long turn-on time

 Interface to various Super I/O and Controller Devices  Designed to Accommodate Light Loss with Cosmetic Window  Minimum External Components Required

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1.2.13 Special Feature Function

1.2.13.1 Hot Key Function

Keys Combination Feature Meaning Fn + F5 LCD/external CRT Rotate display mode in LCD only, CRT only and

switching simultaneously display.

Fn + F6 Brightness down Decreases the LCD brightness / No function in

DSTN model

Fn + F7 Brightness up Increases the LCD brightness / No function in

DSTN model

Fn + F10 Enable/Disable Battery Toggle Battery Warning on/off

Warning Beep

Fn + F11 Panel Off/On Toggle Panel Off/On

Fn + F12 Suspend to DRAM/HDD Force the computer into either Suspend to HDD or

Suspend to DRAM mode depending on BIOS Setup.

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1.2.13.2 Quick Start Button function

Keys Feature Meaning

IQSB

Mail Received Button (or function “Recognizable Signal”)

Determined by Software component.

ESB1 Entertainment Quick Key Determined by Software component.

ESB2 Instant Interne t Determined by Software component.

ESB3 My Presario Determined by Software component.

ESB4 Search

Determined by Software component.

ESB5 Email

Determined by Software component.

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1.2.13.3 Flash ROM (BIOS)

7521 system utilizes the state-of-the-art Flash EEPROM technology. User can upgrade the system BIOS in the future just running the program from MiTAC.

1.2.13.4 LED Indicators

System has ten status LED indicators to display system activity which include above keyboard and below touch pad:

1. Four LED indicators below touch pad: From left to right that indicates MAIL RECEIVED, AC POWER, BATTERY POWER and BATTERY STATUS:

 Mail Received status: This LED lights to indicate that User received E-mail status. User can define color of LED (yellow

or green) to indicate relation of transmitter.

 AC POWER: This LED lights green when the notebook is being powered by AC, and flash (on 1 second, off 1 second )

when Suspend to DRAM is active using AC power. The LED is off when the notebook is off or powered by batteries, or when Suspend to Disk.

 BATTERY POWER: This LED lights green when the notebook is being powered by batteries, and flashes (on 1

second, off 1 second ) when Suspend to DRAM is active using battery power. The LED is off when the notebook is off or powered by AC, or when Suspend to Disk.

 BATTERY STATUS : During normal operation, this LED stays off as long as the battery is charged. When the battery

charge drops to 10% of capacity, the LED lights red, flashes per 1 second and beeps per 2 second. When AC is connected, this indicator glows green if the battery pack is fully charged, or orange (amber) if the battery is being charged.

2. Six LED indicators above keyboard: From left to right that indicates CD-ROM/MO, HARD DISK DRIVE, FLOPPY DISK DRIVE, NUM LOCK, CAPS LOCK and SCROLL LOCK.

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1.2.13.5 COM port assignment

 COM1: MODEM / RS-232 / Disable  COM2: IR / RS-232 / Disable

1.3 SMM and System BIOS

1.3.1 System Manage ment Mode

7521 system has built in several power saving modes to prolong the battery usage for mobile purpose. User can enable and configure different degrees of power management modes via ROM CMOS setup (booting by pressing F2 key). Following are the descriptions of the SMM and power management modes supported.

1.3.1.1 Full On Mode

In this mode, each device is running with the maximal speed. CPU clock is up to its maximum.

1.3.1.2 Doze Mode

In this mode, CPU will be toggling between on & stop grant mode either. The technology is clock throttling. This can save battery power without loosing much computing capability. The CPU power consumption and temperature is lowered in this mode.

1.3.1.3 Standby Mode

For more power saving, it turns of f the peripheral component. In this mode, the following is the status of each device.

 CPU: Stop grant  LCD: backlight off  HDD: spin down  FDD: standby

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1.3.1.4 Suspend Mode

The most chipset of the system is entering power down mode for more power saving. In this mode , the following is the status of each device.

1.3.1.4.1 Suspend to DRAM:

 CPU: off  SiS630: Partial off  VGA: off  PCMCIA: off  Super IO: off  Audio: off  SDRAM: Self Refresh.

1.3.1.4.2 Suspend to HDD:

 All devices are stopped clock and power-down,  System status is saved in HDD.  All system status will be restored when powered on again.

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1.3.1.5 Other power management functions

1.3.1.5.1 HDD & Video access

System has the ability to monitor video and hard disk activity. User can enable monitoring function for video and/or hard disk individually. When there is no video and/or hard disk activity, system will enter next PMU state depending on the application.

When the VGA activity monitoring is enabled, the performance of the system will have some impact.

1.3.1.5.2 Battery Warning

System also provides Battery capacity monitoring and gives user a warning so that users have chance to save his data before battery dead. Also, this function protects system from mal-function while battery capacity is low.

-Battery Warning: Capacity below 10%, Battery Capacity LED flashes per second, system beeps per 2 seconds. (System beeps

only if BIOS setup enable Battery Warning Beeping. ) System will Suspend to HDD after 2 Minute if BIOS setup enable this function or system will runs until battery dead without any protection.

1.3.1.5.3 Cover Switch

System automatically provides power saving on monitoring Cover Switch. It will save battery power and prolong the usage time when user closes the notebook cover unintentionally but the system still in power on mode. There are two functions to be chosen.

1. Switch to CRT

2. Panel Off

3. Suspend to DRAM or Suspend to Disk by CMOS setup

1.3.1.5.4 Battery Warning State

RedSea system provides battery management function and gives warning while battery is in Its low power state. When the battery capacity is below 10% (Battery Warning State), system will generate beep for every 2 seconds. When hearing the beeping, it is recommended that user should plug in AC adapter to get power from external source, or stop working and save his data file to prevent disaster results.

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MiTAC 7521 N, 7521 B, 7521 Troubleshooting Manual

Specifications and Main Features

Frequently Asked Questions

User Manual