MiTAC 7521 PLUS/N User manual
SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
7521
7521
TESTING TECHNOLOGY DEPARTMENT / TSSC
TESTING TECHNOLOGY DEPARTMENT / TSSC
BY
BY
：
：：
：
：
：：
：
Jesse .Jan
Jesse .Jan
MAR. 2001
MAR. 2001
1
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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 95-
ready 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/Socket 370 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, on-
chip
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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