MiTAC 7521 PLUS/N User manual

SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
7521 Plus/N
7521 Plus/N
AUG. 2001
AUG. 2001
BY
BY
：
：
Richard Wang
Richard Wang
TESTING TECHNOLOGY DEPARTMENT / TSSC
TESTING TECHNOLOGY DEPARTMENT / TSSC

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CONTENTS
CONTENTS
1.
1. Hardware Engineering Specification Hardware Engineering Specification ---------------------------------------------------------------- ------------------------------------------------------------------------------- ---------------
1.1 Introduction -----------------------------------------------------------------------------------------------------------------------------
1.2 Hardware System ----------------------------------------------------------------------------------------------------------------------
1.3 Special Feature Function -------------------------------------------------------------------------------------------------------------
1.4 SMM And System BIOS --------------------------------------------------------------------------------------------------------------
1.5 Peripheral Component ----------------------------------------------------------------------------------------------------------------
1.6 Appendix: GPIO Definitions ---------------------------------------------------------------------------------------------------------
2. System View And Disassembly
2. System View And Disassembly ---------------------------------------------------------------- --------------------------------------------------------------------------------------- -----------------------
2.0 Tools Introduction ---------------------------------------------------------------------------------------------------------------------
2.1 System View -----------------------------------------------------------------------------------------------------------------------------
2.2 System Disassembly -------------------------------------------------------------------------------------------------------------------
3. Definition & Location Of Connectors / Switches Setting
3. Definition & Location Of Connectors / Switches Setting ------------------------------------------------------- -------------------------------------------------------
3.1 Mother Board -A -----------------------------------------------------------------------------------------------------------------------
3.2 Mother Board Switch Table ---------------------------------------------------------------------------------------------------------
3.3 Mother Board -B -----------------------------------------------------------------------------------------------------------------------
3
3.4 Daughter Board ------------------------------------------------------------------------------------------------------------------------
3.5 Charger Board --------------------------------------------------------------------------------------------------------------------------
3.6 IQSB Board
3.6 IQSB Board ---------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------
3.7 Easy Start Button Board
3.7 Easy Start Button Board ---------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------- ---------------------------------------------
4.
4. Definition & Location Of Major Components Definition & Location Of Major Components ---------------------------------------------------------------- -------------------------------------------------------------------- ----
4.1 Main Board ( Side A ) -----------------------------------------------------------------------------------------------------------------
4.2 Main Board ( Side B ) -----------------------------------------------------------------------------------------------------------------
5. Pin Description Of Major Components
5. Pin Description Of Major Components ---------------------------------------------------------------- ---------------------------------------------------------------------------- ------------
5
5.1 Pentium III/Celeron FC-PGA2 CPU -----------------------------------------------------------------------------------------------
5
5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset --------------------------------------------------------------
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49
80
84
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3
4
37
39
51
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55
76
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81
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90

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CONTENTS
CONTENTS
6.
6. System Block Diagram System Block Diagram ---------------------------------------------------------------- ------------------------------------------------------------------------------------------------- ---------------------------------
7. Maintenance Diagnostic
7. Maintenance Diagnostic ---------------------------------------------------------------- ----------------------------------------------------------------------------------------------- -------------------------------
7.1 Introduction -----------------------------------------------------------------------------------------------------------------------------
7
7.2 Error Codes -----------------------------------------------------------------------------------------------------------------------------
7.3 Diagnostic Tools ------------------------------------------------------------------------------------------------------------------------
8. Trouble Shooting
8. Trouble Shooting ---------------------------------------------------------------- -------------------------------------------------------------------------------------------------------- ----------------------------------------
8
8.1 No Power ---------------------------------------------------------------------------------------------------------------------------------
8
8.2 No Display -------------------------------------------------------------------------------------------------------------------------------
8.3 VGA Controller Failure LCD No Display ----------------------------------------------------------------------------------------
8.4 External Monitor No Display --------------------------------------------------------------------------------------------------------
8.5 Memory Test Error --------------------------------------------------------------------------------------------------------------------
8.6 Keyboard ( K/B ) , Touch-Pad ( T/P ) , ESB Test Error -----------------------------------------------------------------------
8.7 CD-ROM Drive Test Error ----------------------------------------------------------------------------------------------------------
8
8.8 Hard Drive Test Error ----------------------------------------------------------------------------------------------------------------
8.9 USB Port Test Error ------------------------------------------------------------------------------------------------------------------
8.10 Audio Failure --------------------------------------------------------------------------------------------------------------------------
8.11 SIO Port Test Error ------------------------------------------------------------------------------------------------------------------
8.12 PIO Port Test Error -----------------------------------------------------------------------------------------------------------------
8.13 PC CARD Socket Failure -----------------------------------------------------------------------------------------------------------
9. Spare Parts List
9. Spare Parts List ---------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------- ------------------------------------------
10. System Explode View
10. System Explode View ---------------------------------------------------------------- ------------------------------------------------------------------------------------------------- ---------------------------------
11. 7521 Plus/N Schematics ----------------------------------------------------------------------------------------------
12. Reference
12. Reference ---------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------
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128
134
180
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98
98
99
101
102
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145
------------------------------------------------

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1. Hardware Engineering Specification
1.1 Introduction
1.1.1 General Description
This document describes the engineering specification for 7521 plus portable notebook computer system.
1.1.2 System Overview
The 7521 plus model motherboard will accept Intel Pentium III at FSB 133/100MHz and Celeron at FSB 66MHz processor
with FC-PGA packaged. Those are Pentium III 600/650/667/700/733/ 750/800/866 MHz, and Celeron
3/566/600/633/667/700/733/766 MHz.
This system is based on PCI architecture and is fully compatible with IBM PC/AT specification, which has standard
hardware peripheral interface. 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 key 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 and TV-OUT functions.
The memory subsystem supports 64MB on board SDRAM, one 144pin SO-DIMM socket for upgrading up to 320MB.
The SiS630S integrates the north bridge chip, super south bridge and the real 128-bit 3D graphics accelerator all into one
single chip. It provides, 3D Positional Audio, Advance H/W DVD playback and 2D/3D graphics engine.
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, a CODEC CS4299 is integrated onto the motherboard that support 16-bit stereo, Sound Blaster
Pro, Windows Sound System compatibility, and full-duplex capabilities to meet the demands of interactive multimedia
applications.

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The SiS900 is a single chip 10/100Mbps Fast Ethernet LAN solution, which fully integrates both the Media Access
Controller (MAC) with PCI bus master interface and 802.3u compliant 10/100Mbps physical layer interface into a 128 pins
PQFP, 0.35um process chip. It is targeted at low-cost, low-power, high volume desktop PC motherboards, mobile PC
module, adapter cards, and embedded systems.
The Chrontel’s CH7005 digital PC to TV encoder is a standalone integrated circuit that provides a PC 99 compliant solution
for TV output. It provides a universal digital input port to accept a pixel data stream from a compatible VGA controller (or
equivalent) and converts this directly into NTSC or PAL TV format.
A full set of software drivers and utilities are available to allow advanced operating systems such as Windows 98 or
Windows ME to take full advantage of the hardware capabilities. Features such as bus mastering IDE, Plug and Play,
Advanced Power Management (APM) with application restart, software-controlled power shutdown. Following chapters
will have more detail description for each individual sub-systems and functions.
1.2 Hardware System
1.2.1 System parts
Central Processing Unit : using Intel Pentium III or Celeron microprocessors in FC-PGA packaged.
Synthesizer : ICS9248-102.
SiS630S : CPU/PCI and CPU/AGP Bridge with memory controller/IDE/USB/PMU controller.
Super I/O Controller : NS PC97338VJG.
PCMCIA Interface Controlle : TI 1225.
Keyboard System : Hitachi H8 (3434F) universal keyboard controller.
3D Audio System : CRYSTAL CS4299 CODEC.
FIR port: HP HSDL-3600#007 FIR module.
FAX/MODEM : Software Modem (option).
LAN : SiS900
CH7005 : Digital PC to TV Encoder with Macrovision™

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1.2.2 CPU MODULE
Intel Pentium III/Celeron Processors with 370 pins FC-PGA package.
Pentium III 600/650/667/700/733/750/800 MHz, FC-PGA package at FSB 133/100Mhz.
Celeron 600/633/667/700/733 MHz, FC-PGA package at FSB 66Mhz.
1.2.3 Synthesizer
System frequency synthesizer : ICS9248-102
Maximized EMI suppression using Integrated Circuit System 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 within 500ps, fourteen copies of SDRAM output, output to output skew between them within 250ps.
One 48MHz output for USB and selectable 24/48MHz output (pin 25).
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 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™
Single Chipset
The single chipset, SiS630S, provides a high performance/low cost Desktop solution for the Intel Slot 1 and socket 370
series CPUs based system by integrating a high performance North Bridge, advanced hardware 2D/3D GUI engine, Super-
South bridge and an AGP4X Slot. In addition, SiS630S 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 TM technology and advanced 64-bit graphic display interface, SiS630S delivers AGP 4x
performance and memory bandwidth of up to 1 GB/s. In addition, SiS also supports an extra AGP Slot that supports 4X
and Fast Write transactions. Furthermore, SiS630S provides powerful hardware decoding DVD accelerator to improve the
DVD playback performance. In addition to providing the standard interface for CRT monitors, SiS630S 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. SiS630S adopts Share System Memory Architecture which can flexibly utilize the frame
buffer size up to 64MB.
The “ Super-South Bridge “ in SiS630S integrates all peripheral controllers/accelerators /interfaces. SiS630S provides a
total communication solution including 10/100Mb Fast Ethernet for Office requirement and 1Mb HomePNA for Home
Networking. SiS630S offers AC’7 compliant interface that comprises digital audio engine with 3D-hardware accelerator,
on-chip sample rate converter, and professional wavetable along with separate modem DMA controller. SiS630S 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 controllers with six 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 DMA33/66/100 function that supports the
data transfer rate up to 100 MB/s. It provides the separate data path for two IDE channels that can eminently improve the
performance under the multi-tasking environment.
SiS630S Features
Host Interface Controller
Supports Intel Slot 1/Socket370 Pentium II/!!! CPUs
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 Memory Bus up to 133 MHz
System Memory Size up to 1.5 GB
Up to 512MB 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 increments
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
Supports Additional AGP slot with 4X and Fast Write Transaction
Meet PC99 Requirements
PCI 2.2 Specification Compliant
High Performance PCI Arbiter
Supports up to 4 PCI Masters
Guaranteed Minimum Access Time for CPU and PCI Masters

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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 33/66/100
Two Independent IDE Channels Each with 16 DW FIFO
Virtual PCI-to-PCI Bridge
Integrated Ultra AGP VGA for Hardware 2D/3D Video/Graphics Accelerators
Supports Tightly Coupled 64 Bits 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

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32-Bit VLIW Floating-Point Primitive Setup Engine
Supports Flat and Gouraud Shading
Supports High Quality Dithering
Supports Bump Mapping
Supports Z-Test, Stencil Test, Alpha Test and Scissors Clipping Test
Supports Z Pre-Test for Reducing Texture Read DRAM Bandwidth
Supports Individual Z-Buffer and Render Buffer at the Same Time
Supports 16/24/32 BPP Z Buffer Integer/Floating Formats
Supports 16/32 BPP Render Buffer Format
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 Palette for High Performance Palette Look Up
Supports 1/2/4/8 BPP Luminance Texture
Supports 1/2/4/8 BPP Intensity Texture
Supports 8/16/24/32 BPP RGB/ARGB Texture Format
Supports Video YUV Texture in All Supported Texture Formats
Supports MIP-Mapped Texture Transparency, Blending, Wrapping, Mirror and Clamping
Supports Fogging and Alpha Blending