MiTAC 7521 PLUS/N Service Manual
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MiTAC 7521 PLUS/N Service Manual

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

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  • Page 1 SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR 7521 Plus/N 7521 Plus/N Richard Wang ： Richard Wang ： TESTING TECHNOLOGY DEPARTMENT / TSSC TESTING TECHNOLOGY DEPARTMENT / TSSC AUG. 2001 AUG.

  • Page 2: Table Of Contents

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE CONTENTS CONTENTS 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.
  • Page 3 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE CONTENTS CONTENTS System Block Diagram ---------------------------------------------------------------- --------------------------------- System Block Diagram ---------------------------------------------------------------- --------------------------------- 7. Maintenance Diagnostic ---------------------------------------------------------------- ------------------------------- 7. Maintenance Diagnostic ---------------------------------------------------------------- ------------------------------- 7.1 Introduction ----------------------------------------------------------------------------------------------------------------------------- 7 .2 Error Codes ----------------------------------------------------------------------------------------------------------------------------- 7.3 Diagnostic Tools ------------------------------------------------------------------------------------------------------------------------ 8.

  • Page 4: Hardware Engineering Specification

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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.

  • Page 5: Hardware System

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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.

  • Page 6: Cpu Module

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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.
  • Page 7 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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.
  • Page 8 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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]...
  • Page 9 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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...
  • Page 10 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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...
  • Page 11 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Internal Full 32 Bits ARGB Format Ultra Pipelined Architecture for Ultra High Performance and High Rendering Quality 128-Bit 2D Engine with a Full Instruction Set Built-In 64x64x2 Bit-Mapped Hardware Cursor Built-In 32x32x16, 32x32x32 Bit-Mapped Color Hardware Cursor Maximum 64 MB Frame Buffer with Linear Addressing MPEG-2 ISO/IEC 13818-2 MP@ML and MPEG-1 ISO/IEC 11172-2 Standards Compliant...
  • Page 12 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Built-in Programmable 24-bit True-Color RAMDAC up to 270 MHz Pixel Clock RAMDAC Snoop Function Built-in Reference Voltage Generator and Monitor Sense Circuit Supports Down-Loadable RAMDAC for Gamma Correction in High Color and True Color Mode Built-in Dual-Clock Generator Supports Multiple Adapters and Multiple Monitors Built-in PCI Multimedia Interface...
  • Page 13 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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 Power Management Meets ACPI 1.0 Requirements Meets APM 1.2 Requirements...
  • Page 14 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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...
  • Page 15 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Universal Serial Bus Host Controller Open HCI Host Controller with Root Hub Two USB Host Controllers Six USB Ports Supports Legacy Devices Over Current Detection I²C Bus/SMBus Series Interface Integrated Fast Ethernet Controller and MAC Interface Plug and Play Compatible High-Performance 32-Bit PCI Bus Master Architecture with Integrated Direct Memory Access (DMA) Controller for Low...
  • Page 16 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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 &...
  • Page 17 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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.
  • Page 18 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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 V pp Switching for Dual-Slot PC Card Interface I2C 3-Lead Serial Interface Compatible With CardBus Controllers 3.3 V Low-Voltage Mode Meets PC Card Standards...
  • Page 19 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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%...
  • Page 20 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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.

  • Page 21: System Bios

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.9 System BIOS See software BIOS specification 1.2.9.1 System BIOS and Software Features Overview Including System BIOS, VGA BIOS, POST, APM, PnP, ACPI and PXE BIOS Support Shadow RAM BIOS Feature Support APM 1.2 Support ACPI V1.0B Support DMI 2.3...
  • Page 22 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.9.2 BIOS Setup Feature Introduction Setup Utility allows you to enter the system configuration information. This information is needed by the system to identify the type of device installed and to setup special features. Typical configuration information includes the data and time, the type of disk drives, and the amount of memory;...

  • Page 23: Power Management

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.10 POWER MANAGEMENT ACPI Introdution The system BIOS is conform with ACPI1.0B specification. Concept ACPI (Advanced Configuration and Power Interface) replaces APM and PnP functionality, it’s a Operating-System controlled Power Management and a subset of OnNow system.
  • Page 24 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Summary of Device Power Sates Device State Power Consumption Device Context Retained Driver Restoration D0 – Fully On As needed for operation None D0>D1>D2>D3 >D2 <D2 D0>D1>D2>D3 <D1 >D1 D3 –...
  • Page 25 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Events that can bring the platform back to Working state : •. Pressing any key on the keyboard. •. Wake on LAN. •. Modem answering call. •. Pressing the power button less than 4 seconds. 3.Hibernation (S4) The S4 sleeping state is lowest power, longest wake-up latency sleeping state supported by ACPI.
  • Page 26 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5.Mechanical Off No power supplied and consumption, achieved by unplugging the machine and removing the battery. By definition, unit will return to Soft Off (S5) by restoration of power. If previous mode was Hibernation (S4), then system returns to S4. Component Level Power Management Matrix...
  • Page 27 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Concept This platform supports Advanced Power Management (APM1.2) developed by Microsoft and Intel. APM consists of one or more layers of software that support power management in computers with power manageable hardware. Power State 1.Full Power Default mode.
  • Page 28 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 4.Suspend System in not working and in a low power consumption state with maximum power savings . Most power managed devices are not powered. Includes stopping the CPU clock and shutting down all peripherals. Detection restores full power state.
  • Page 29 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Off System is not working, the power supply is off. Operational parameters are not saved. System resets and initializes when transitioning to the Full on State. Component Level Power Management Matrix...

  • Page 30: Memory System

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.11 Memory System HYUNDAI SDRAM cell on board13 One chip memory size : 4Banksx1Mx16bit SDRAM. Standard 54-pin TSOP-II package. Power supply : 3 ±0.3V Supports One JEDEC 144-pin SO-DIMM sockets on Mother Board for expansion Supports 3.3V SDRAM 2 banks on one socket.
  • Page 31 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.12 Interface Power Supply Jack. One Standard Parallel Port With ECP/EPP Functions Supports Two USB port for all USB devices. Supports Macrovision’s TV-OUT connector. Tunable volume by variable resistor. Two Serial Ports, One For COM1/COM2, The Other For FIR/MIR/SIR/SHARP ASK.
  • Page 32 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.13 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 Volume Control: Rotary VR Stereo BTL 2x1 W amplifiers (TPA0202) with 8-Ohm Load.
  • Page 33 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.14 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...
  • Page 34 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.15 SiS900 Fast Ethernet PCI Bus 10/100Mbps LAN Single Chip with OnNow Support 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.
  • Page 35 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE SiS900 Features Integrated Fast Ethernet controller and 10/100 megabit per second (Mbps) Physical Layer Transceivers for the PCI local bus PCI specification revision 2.1 compliant 32-bit glueless PCI host interface Plug and Play compatible Supports PCI clock frequency from DC to 33 MHz independent of network clock Supports network operation with PCI clock from 25Mhz to 33Mhz...
  • Page 36 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Power down of 10Base-T/100Base-TX sections when not in use Jabber control and auto-polarity correction for 10Base-T. User programmable LED function mapping Supports software, enhanced software, and automatic polling schemes to internal PHY status monitor and interrupt Supports 10BASE-T, 100BASE-TX, and any future Supports PC97, PC98, and Net PC requirements - Green PC compatible Supports Advanced Configuration and Power Interface Specification (ACPI) Revision 1.0...
  • Page 37 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.2.16 CH7005C Digital PC to TV Encoder The Chrontel’s CH7005 digital PC to TV encoder is a standalone integrated circuit which 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.

  • Page 38: Special Feature Function

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.3 Special Feature Function 1.3.1 Hot Key Function 1.3.2 Easy Start Button function...

  • Page 39: Led Indicators

    1.3.3 Flash ROM (BIOS) 7521 plus 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. 1.3.4 LED Indicators System has ten status LED indicators to display system activity which include above keyboard and below touch pad:...

  • Page 40: Smm And System Bios

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.3.5 COM port assignment COM1 : MODEM / RS-232 / Disable COM2 : IR / RS-232 / Disable 1.4 SMM and System BIOS System Management Mode 7521 plus 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).
  • Page 41 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Suspend to DRAM: • CPU : off • SiS630 : Partial off • VGA : Suspend • PCMCIA : Suspend • Super IO : off • Audio : off •...
  • Page 42 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 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.

  • Page 43: Peripheral Component

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.5 Peripheral Components LCD Panel Hyundai 14X13 1024X768 XGA TFT Panel Display size (diagonal): 14.1 inch 262,144 colors display 1 channel LVDS Interface (Flat Link, Ti) Display Mode: Normal White Back-light unit: CCFL, 1 tube DC for Panel: 3.3V+-0.3V Pixel pitch: 0.279(H) X0.279 (V)
  • Page 44 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Rotational Speed: 4,200 rpm +-1% Average Latency: 7.14 ms Interface: ATA-5 (Max. Cable length: 0.46 m) Data transfer rate: To/From Media: 12.5 to 22.3 MB/s To/From Host: 66.6 MB/s Max (Ultra-DMA mode 4) Data Buffer Size: 512 KB Spin up current: 0.9Arms Max.
  • Page 45 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Touch Pad Logic Tech: 904255-0002 Vcc: 5V +- 0.5 Icc (max): 15 mA Interface: PS/2 X/Y position resolution: 480+-50 CPI Dimension: 66mm x 50mm x 5.0mm Effective area: 55mm x 39 mm Operating Temp.
  • Page 46 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE XM-1802B: Average data transfer rate of 3,600 KB/s Average random seek time of 100ms Random access time of 110ms. Small size (only 12.7(H) x 128(W) x 129(D) mm) Extremely low weight of 230g Low average power consumption of 2.4W (maximum only 3.2W).
  • Page 47 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE LED Indicators Lower ICON LEDs on M/B Mail Received status (left 1) AC POWER (left2) BATTERY POWER (right 2) BATTERY STATUS (right 1) Upper ICON LEDs on M/B CD-ROM/MO (left 1) HARD DISK DRIVE (left 2) FLOPPY DISK DRIVE (left 3)
  • Page 48 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Serial Interface Using ADM3311ARU chip ESD rating: ±3KV Lead TEMP. (Soldering 10sec): +300 ℃ Number of RS-232 drivers: 3 Number of RS-232 receivers: 5 28 pin SSOP package Support shutdown mode (pin 23).
  • Page 49 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Dimension: (25mmx25mmx10mm)±0.5mm Made by Sunonwealth Electric Machine Industry Co. Ltd. Model number: KD0502PEB2-8 DC brushless fan Operating speed: 8000 rpm. Input voltage: 5V Operating temperature: -10 - +70 degree C. Weight: 7g Direction of rotation: C.C.W.

  • Page 50: Appendix: Gpio Definitions

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 1.6 Appendix 1: GPIO definitions GPI DEFINITIONS Signal Function Description During After S4/S5 Remark Name PCIRST# PCIRST# GPIO [0] Panel ID switch1 Panel ID select Defined GPIO [1] Panel ID switch2 Panel ID select Defined...
  • Page 51 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Note 1. LCD ID LCD_SW4 LCD_SW3 LCD_SW2 LCD_SW1 Vendor PANEL Description HannStar HSD141PX11 14.1” Unipac UP141X01-2 14.1” Hyundai 14X13-101 14.1” Hyundai HT15X31 15” Hitachi TX38D85VC1CAA 15” Note 3. CPU & SDRAM Frequency setting table: SW_FS3 SW_FS2 SW_FS1...

  • Page 52: System View And Disassembly

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2 System View and Disassembly 2.0 Tools introduction 1.Minus screw driver with bit size 3mm for CPU assembly & disassembly. 2. Auto screw driver for system assembly & disassembly. Bit Size Screw Size Tooling...

  • Page 53: System View

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2 System View and Disassembly 2.1 System View 2.1.1 Front View Mail-Received Button/Indicator Power Indicators Top Cover Latch 2.1.2 Left-Side View Audio Input Connector Microphone Connector Audio Output Connector Volume Control PC Card Slots Floppy Disk Drive...
  • Page 54 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.1.3 Right-Side View Battery Pack CD-ROM/DVD-ROM Drive IR Port 2.1.4 Rear View Power Connector PS/2 Port USB Ports Parallel Port Serial Port RJ-45 Connector VGA Port TV-Out Connector RJ-11 Connector Kensington Lock...
  • Page 55 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.1.5 Bottom View CPU Cover Modem Card Cover FDD/HDD Module Battery Pack 2.1.6 Top-Open View LCD Screen Power Button Keyboard Touchpad Stereo Speaker Set Easy Start Buttons...

  • Page 56: System Disassembly

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2 System Disassembly The section discusses at length each major component for disassembly/reassembly and show corresponding illustrations. Use the chart below to determine the disassembly sequence for removing components from the notebook.

  • Page 57: Battery Pack

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.1 Battery Pack Disassembly 1. Carefully put the notebook upside down. 2. Turn the locking button to the "unlock” ( ) position ( ), then slide and hold the latch in the unlock position and pull the battery pack out of the compartment ( ).(figure 2-1) Figure 2-1 Reassembly...
  • Page 58 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.2 CPU Disassembly 1. Carefully put the notebook upside down. 2. Remove two screws locking the CPU compartment cover, and then lift the cover up. (figure 2-2) Figure 2-2 Figure 2-3 3.
  • Page 59 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 4. Insert a minus screwdriver 101 (JIS standard) into the “OPEN” hole of the socket, and push the screwdriver toward the CPU to free the CPU. Now you can take out the CPU from the socket.

  • Page 60: Modem Card

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.3 Modem Card Disassembly 1. Carefully put the notebook upside down. 2. Remove one screw locking the modem card compartment cover, and then lift the cover up. (figure 2-5) Figure 2-5 Figure 2-6 3.
  • Page 61 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 4. Slightly lift up the connector board, and then remove one screw fastening the modem card. Now you can take out the modem card from the compartment. (figure 2-7) Figure 2-7 Reassembly 1.
  • Page 62 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.4 FDD/HDD Module Disassembly 1. Carefully put the notebook upside down. 2. Remove one screw and slide the FDD/HDD module out of the compartment. (figure 2-8) Figure 2-8...
  • Page 63 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 3. To take the hard disk drive apart, remove two screws of the hard disk. Then lift the hard disk up and unplug the connector to remove it. (figure 2-9) Figure 2-9 Figure 2-10 4.
  • Page 64 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.5 CD-ROM Drive Disassembly 1. Carefully put the notebook upside down. 2. Remove the battery pack. (See section 2.2.1 Disassembly.) 3. Remove the modem card. (See section 2.2.3 Disassembly.) 4.
  • Page 65 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 6. Hold the CD-ROM drive and slide it outward carefully. (figure 2-12). Figure 2-12 Reassembly 1. Push the CD-ROM drive into the compartment. 2. Replace the base unit frame and secure with thirteen screws (includes one locking the CD-ROM drive). 3.
  • Page 66 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.6 Keyboard Disassembly 1. Open the top cover. 2. Press the locking latch downward to unlatch the Easy Start panel ( ) , push it leftward and lift it up from the left side ( ). (figure 2-13) Figure 2-13 Figure 2-14 3.
  • Page 67 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.7 SO-DIMM Disassembly 1. Remove the keyboard to access the SO-DIMM sockets. (See section 2.2.6 Disassembly.) 2. Pull the retaining clips outwards ( ) and remove the SO-DIMM ( ). (figure 2-15) Figure 2-15 Reassembly 1.

  • Page 68: Lcd Assembly

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.8 LCD Assembly Disassembly 1. Open the top cover and remove the Easy Start panel. (See steps 1 to 2 in section 2.2.6 Disassembly.) 2. Remove the two hinge covers by inserting a flat screwdriver to the rear of the cover and pry the cover out.
  • Page 69 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE Reassembly 1. Attach the LCD assembly to the base unit and secure with four screws on the hinges. 2. Reconnect the LCD cable connectors to the system board. 3.
  • Page 70 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.9 LCD Panel Disassembly 1. Remove the LCD assembly. (See section 2.2.8 Disassembly.) 2. Remove the two rubber pads and two screws on the lower part of the panel. (figure 2-18) Figure 2-18 Figure 2-19 3.

  • Page 71: Inverter Board

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.10 Inverter Board Disassembly 1. Remove the LCD assembly and detach the LCD frame (see instructions in previous two sections). 2. To remove the inverter board at the bottom side of the LCD assembly, unplug the cable and remove the two screws.

  • Page 72: System Board

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.11 System Board Disassembly 1. Remove the Keyboard. (See section 2.2.6 Disassembly.) 2. Remove the LCD assembly. (See section 2.2.8 Disassembly.) 3. Remove seven screws, and then take out the Easy Start board. (figure 2-21) Figure 2-21 Figure 2-22 4.
  • Page 73 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 6. Remove six screws and two hexnut screws fastening the metal shield, and then lift the shield up from the system board carefully. (figure 2-23) Figure 2-23 Figure 2-24 7.
  • Page 74 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8. Remove four screws to take the recharge board apart. (figure 2-25) Figure 2-25 Figure 2-26 9. Remove two screws fastening the system board and disconnect the cable of the touchpad. Now you can lift the system board up from the base unit.
  • Page 75 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 6. Replace the base unit frame and secure with twelve screws. 7. Replace the battery pack, heatsink, modem card, FDD/HDD module, and CD-ROM drive. 8. Secure the four screws on the rear side of the notebook. 9.
  • Page 76 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 2.2.12 Touchpad Disassembly 1. Remove the system board. (See section 2.2.11 Disassembly.) 2. Remove the four screws to lift up the touchpad holder and touchpad panel. (figure 2-27) Figure 2-27 Reassembly 1.

  • Page 77: Definition & Location Of Connectors / Switches Setting

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 3. Definition & Location Of Connectors / Switches 3.1 Mother Board-A J6: 144 pins expansion SDRAM SO-DIMM socket. J1: Inverter BD CONN. SW1: Cover Suspend Switch. J2: LCD panel LVDS connector. SW2: Power button.

  • Page 78: Mother Board Switch Table

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 3. Definition & Location Of Connectors / Switches 3.2 Mother Board Switch Table SW3. CPU & SDRAM Frequency setting table: SW_FS3 SW_FS2 SW_FS1 SW_FS0 SDRAM SW4. LCD Panel ID Select LCD_SW4 LCD_SW3 LCD_SW2 LCD_SW1 Vendor PANEL...

  • Page 79: Mother Board-B

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 3. Definition & Location Of Connectors / Switches 3.3 Mother Board-B J507 J505 J506 J504 J508 J501 PJ501 J502 J503 U501 U502 J509 BT501 J510 J511 VR501 U503 J506 J512 J513...

  • Page 80: Daughter Board

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 3. Definition & Location Of Connectors / Switches 3.4 Daughter Board MDC/LAN transfer board JP1: MDC jump wire connector. J1: RJ-11 phone jack for internal modem. JP3: Connector 2 for connected MDC/LAN transfer board J23: MDC jump wire connector.

  • Page 81: Charger Board

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 3. Definition & Location Of Connectors / Switches 3.5 Charger Board Charge board(side B) Charge board(side A) SW500 J500 J1:Charger & Touch-Pad connector to M/B. J500: Touch-Pad button connector. PJ4:Battery pack connector.

  • Page 82: Iqsb Board

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 3. Definition & Location Of Connectors / Switches 3.6 IQSB Board 3.7 Easy Start Button Board Easy Start Button Board IQSB board(side A) (side A) SW4 SW5 Easy Start Button Board (side B) IQSB board(side B) J501...

  • Page 83: Definition & Location Of Major Components

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 4. Definition & Location Of Major Components 4.1 Main Board ( Side A ) PU22 PU10 PU14 PU19,12,23 PU18 U16 U17 U13: TPS2206 PCcard Power switch matrix. U1: ADM3311ARU RS232/SIO. U31:W83626F LPC to ISA.

  • Page 84: Main Board ( Side B )

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 4. Definition & Location Of Major Components 4.2 Main Board ( SIDE B ) U502 BT501 U503 U505 U502: PH163112 LAN Controller. U503: Socket 370 CPU. U505: PCI1225PDV PC CARD interface controller.

  • Page 85: Pin Description Of Major Components

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.1 Pentium III/Celeron FC-PGA2 CPU Alphabetical Signal Reference Signal Name Signal Description Signal Name Signal Description BERR# The BERR# (Bus Error) signal is asserted to indicate an A[35:3]# The A[35:3]# (Address) signals define a 2 -byte physical memory...

  • Page 86: Pin Descriptions Of Major Components

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.1 Pentium III/Celeron FC-PGA2 CPU Alphabetical Signal Reference Signal Name Signal Description Signal Name Signal Description BPRI# The BPRI# (Bus Priority Request) signal is used to arbitrate for DBSY# I/O- The DBSY# (Data Bus Busy) signal is asserted by the agent...
  • Page 87 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.1 Pentium III/Celeron FC-PGA2 CPU Alphabetical Signal Reference Signal Name Signal Description Signal Name Signal Description GHI# The GHI# signal controls which operating mode bus ratio is selected INTR The INTR (Interrupt) signal indicates that an external interrupt has 1.5V...
  • Page 88 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.1 Pentium III/Celeron FC-PGA2 CPU Alphabetical Signal Reference PWRGOOD Relationship at Power On Signal Name Signal Description The PWRGOOD signal, which must be supplied to the processor, is used to protect internal circuits against voltage sequencing issues.
  • Page 89 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.1 Pentium III/Celeron FC-PGA2 CPU PWRGOOD Relationship at Power On Signal Name Signal Description Signal Name Signal Description RSP# The RSP# (Response Parity) signal is driven by the response agent The TDI (Test Data In) signal transfers serial test data to the GTL+ (the agent responsible for completion of the current transaction)
  • Page 90 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.1 Pentium III/Celeron FC-PGA2 CPU PWRGOOD Relationship at Power On Signal Name Signal Description The VID[4:0] (Voltage ID) pins/balls can be used to support VID[4:0] Open- automatic selection of power supply voltages.

  • Page 91: Sis630S Slot 1/Socket 370 2D/3D Ultra-Agp™ Single Chipset

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset Host Bus Interface Name Tolerance Power Type Description Name Tolerance Power Type Description Plane Attr Plane...
  • Page 92 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset Host Bus Interface Name Tolerance Power Type Description Name Tolerance Power Type Description Plane Attr Plane...
  • Page 93 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset PCI Interface Name Tolerance Power Type Description Name Tolerance Power Type Description Plane Attr Plane Attr...
  • Page 94 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset VGA Interface Name Tolerance Power Type Description Name Tolerance Power Type Description Plane Attr Plane Attr...
  • Page 95 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset Power management Interface Name Tolerance Power Type Description Name Tolerance Power Type Description Plane Attr Plane...
  • Page 96 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset RTC Interface Fast Ethernet and Homenetworking interface Name Tolerance Power Type Description Name Tolerance Power Type Description...
  • Page 97 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 5. Pin Descriptions Of Major Components 5.2 SiS630S Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset USB interface Power and Ground Signals Name Tolerance Power Type Description Name Tolerance Power Type Description...

  • Page 98: System Block Diagram

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 6. System Block Diagram ON BOARD SDRAM SH10 U503 Pentium III / Celeron CPU / FC-PGA TMDS DS90C363 LCD PANEL LVDS SO-DIMM SH11 J501 SOCKET TV OUT CH7005C S-VIDEO TV-Encoder SH11...

  • Page 99: Maintenance Diagnostic

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 7. Maintenance Diagnostics Introduction Introduction Each time the computer is turned on, the system bios runs a seri es of internal Each time the computer is turned on, the system bios runs a seri es of internal checks on the hardware.

  • Page 100: Error Codes

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 7. Maintenance Diagnostics 7.2 Error Codes : Following is a list of error codes in sequent display on the PIO debug board. SYSTEM SOFT BIOS: CODE DESCRIPTION CODE DESCRIPTION Start of boot loader sequence.

  • Page 101: Maintenance Diagnostics

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 7. Maintenance Diagnostics 7.2 Error Codes : Following is a list of error codes in sequent display on the PIO debug board. SYSTEM SOFT BIOS: CODE DESCRIPTION Protected mode exit successful Update keyboard output port to disable gate of A20 Setup cache controller Test if 18.2Hz periodic working...

  • Page 102: Diagnostic Tools

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 7. Maintenance Diagnostics Diagnostic Tools : Diagnostic Tools : PIO CONNECTOR PIO CONNECTOR P/N:411904800001 CIRCUIT: CIRCUIT: DESCRIPTION :PWA;PWA-378PORT DEBUG BD Note:Order it from MIC/TSSC PIN1 : STROBE PIN 13 : SLCT PIN1 : STROBE PIN 13 : SLCT CONNECTOR...

  • Page 103: Trouble Shooting

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8. TROUBLE SHOOTING 8.1 NO POWER 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 HARD DRIVE TEST ERROR 8.9 USB PORT TEST ERROR...
  • Page 104 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.1 NO POWER: When the power button is pressed, nothing happens ,power indicator does not light up. 1. Check AC Adaptor. 2. Check OUTLET. 3.Check Charge B’D 22.5V 2.67A OUTLET Power Jack MOTHER BOARD...
  • Page 105 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.1 NO POWER: When the power button is pressed, nothing happens ,power indicator does not light up. PJ501 PL501, PF501 F2, U23 POWER IN +S5V VDD5 PWR_VDDIN VDD5S PD3, PD4, VMAIN ADINP...
  • Page 106 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.1 NO POWER: Symptom: Symptom: When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up SI4835DY ADINP...
  • Page 107 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.1 NO POWER: Symptom: Symptom: When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up No power Board level...
  • Page 108 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.1 NO POWER: Symptom: Symptom: When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up CONTINUE CHECK:...
  • Page 109 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.2 NO DISPLAY There is no display on both LCD and monitor NO DISPLAY Plug PIO debug board to PIO port and get the 378h error code. 1. Check if power system is O.K . 2.
  • Page 110 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.2 NO DISPLAY ******System Clock Check ****** U503 U19,U23 CPUCLK FC-PGA U26,U30 SDRAMCLK2 630PCLK U18,U22 U25,U29 SDRAMCLK3 630SDCLK USB_48MHZ APICCLK SDRAMCLK0 SO-DIMM HCLK_CPU CLK14_VGA Socket SDRAMCLK1 R125 R126 U505 SH14 SIS 630S...
  • Page 111 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.2 NO DISPLAY ******Power Good & Reset System ****** +2.5V +S12V +S5V_P SH23 +3V_P PWROK CPU_PWRGOOD 1.5V U503 RESET# 1.8V MAX809 VCC_CORE 7521 Power H8_PWRON_SIS FC-PGA Module +S3V CPURST# R601 SIS_PWRBTN#...
  • Page 112 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.3 VGA CONTROLLER FAILURE LCD NO DISPLAY There is no display or picture abnormal on LCD. +12V R149 SH21 SH11 5 6 7 8 ENABKL_VGA R150 LID_OPEN# FPVCC 1 2 3 ENABKL_VGA# BLADJ 4...
  • Page 113 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.3 VGA CONTROLLER FAILURE LCD NO DISPLAY There is no display or picture abnormal on LCD. VGA CONTROLLER FAILURE Replace motherboard or into board-level Troubleshooting. 1. Confirm LCD panel or monitor is good and check the cable are connected properly.
  • Page 114 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.4 EXTERNAL MONITOR NO DISPLAY There is no display or picture abnormal on CRT monitor. SH11 L518 J506 L516 GREEN L515 BLUE +12V SIS 630S R630 R114 L514 HSYNC R112 L519...
  • Page 115 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.4 EXTERNAL MONITOR NO DISPLAY There is no display or picture abnormal on CRT monitor. VGA CONTROLLER FAILURE Replace motherboard or into board-level Troubleshooting. 1. Confirm monitor is good and check the cable are connected properly.
  • Page 116 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.5 MEMORY TEST ERROR Either on board or extend SDRAM is failure or system hangs up. SDRAMCLK[2~3] SDRAMCLK[0~3] ICS9248-102 ON BOARD 64MB Clock Synthesizer SDRAM SH10 CKE[2,4] RP20,RP22,RP23,RP25 RP41,RP44,RP54,RP53 MDR[0~63] MD[0~63]...
  • Page 117 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.5 MEMORY TEST ERROR Either on board or extend SDRAM is failure or system hangs up. MEMORY TEST ERROR Board-level Troubleshooting for Memory test error. 1. Check if on board SDRAM chips are no cold solder.
  • Page 118 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.6 KEYBOARD(K/B) TOUCH-PAD(T/P) , ESB TEST ERROR Error message of keyboard failure is shown or any key doesn’t work. KBD_US/JP# RP520 SH20 KI[0~7] KO[0~15] SIS 630S SH20 RP18 J502 SH20 K/M CLK...
  • Page 119 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.6 KEYBOARD(K/B) TOUCH-PAD(T/P) , ESB TEST ERROR Error message of keyboard or touch pad failure is shown or any key doesn’t work. Board-level Troubleshooting for KEYBOARD TEST ERROR K/B or T/P test error.
  • Page 120 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.7 CD-ROM DRIVE TEST ERROR An error message is shown when reading data from CD-ROM drive. CD_RST# RST_CDROM Q508 +5VS_CDROM JS503 SH13 C672 C669 RP50, RP51 RP52, RP58 SDD[0~15] RDDS[0~15] J512...
  • Page 121 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.7 CD-ROM DRIVE TEST ERROR An error message is shown when reading data from CD-ROM drive. CD-ROM DRIVE TEST ERROR Board-level Troubleshooting for CD-ROM drive test error. 1. Try another known good transfer board. 2.

  • Page 122: Hard Drive Test Error 8

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.8 HARD DRIVE TEST ERROR Either an error message is shown , or the driver motor continues spinning , while reading data is from or writing data is to hard drive. R210 +5VS_HDD PCIRST#...
  • Page 123 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.8 HARD DRIVE TEST ERROR Either an error message is shown , or the driver motor continues spinning , while reading data is from or writing data is to hard drive. HARD DRIVE TEST ERROR.
  • Page 124 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.9 USB PORT TEST ERROR An error occurs when a USB I/O device is installed. J508 F502 SH21 USB_B1 C506 USB_OC0# F503 USB_A1 C507 USB_OC1# RP21 USBP0+ D/USBP0+ USB_B3 USBP0- D/USBP0-...
  • Page 125 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.9 USB PORT TEST ERROR An error occurs when a USB I/O device is installed. USB TEST ERROR Board-level Troubleshooting for USB test error 1. Check if the USB device is installed properly.

  • Page 126: Audio Failure

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.10 AUDIO FAILURE No sound from speaker after audio driver is installed. AUDIO IN +12V INTERNAL MIC1 C321 ADP3301AR-5 SH16 J509 EXT MIC. L506 L505 SH16 SH16 J503 L503 R504 LINE_IN/L...
  • Page 127 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.10 AUDIO FAILURE No sound from speaker after audio driver is installed. AUDIO OUT SH18 W83626F R179 24.576MHZ C221 CODEC XIN SH24 SH16 J514 ROUT+ TPA0202 ROUT- CHARGE AOUT_R Amplifier LOUT+...
  • Page 128 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.10 AUDIO FAILURE No sound from speaker after audio driver is installed. Board-level AUDIO DRIVE FAILURE Troubleshooting for audio test error. 1. Check if speaker cables are connected properly.

  • Page 129: Sio Port Test Error

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.11 SIO PORT TEST ERROR An error occurs when a mouse or other I/O device is installed. D/RTS# SH19 SH19 COM1RTS# J507 D/TXD COM1TXD D/DTR# COM1DTR# SUPER I/O ADM3311 PC97338VJG D/DSR#...
  • Page 130 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.11 SIO PORT TEST ERROR An error occurs when a mouse or other I/O device is installed. SIO TEST ERROR Board-level Troubleshooting for SIO test error. 1. Check if the mouse or others I/O device are installed (J507) properly.

  • Page 131: Pio Port Test Error

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.12 PIO PORT TEST ERROR When a print command is issued, printer prints nothing or garbage. P_STB# D/STB# SH19 P_D/AFD# D/AFD# J505 SH19 P_D/INIT# D/INIT# P_D/SLIN# D/SLIN# IRQ7 P_D/ACK# D/ACK# PC97338VJG...
  • Page 132 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.12 PIO PORT TEST ERROR When a print command is issued, printer prints nothing or garbage. PIO TEST ERROR Board-level Troubleshooting for PIO test error. 1. Check the PIO device is installed properly.(J505) 2.

  • Page 133: Pc Card Socket Failure

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.13 PC-CARD SOCKET FAILURE An error occurs when a PC card device is installed. +12V VPPAOUT PCLKCARD CARD_VCCA SH15 32K_CARD TPS2206 SH14 AD[0:31] POWER SWITCH MATRIX C/BE[0:3] SLOT A ACD[0:15] TRDY# ACA[0:25]...
  • Page 134 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 8.13 PC-CARD SOCKET FAILURE An error occurs when a PC card device is installed. PC CARD TEST ERROR Board-level Troubleshooting for PC CARD test error 1. Check if the PC CARD device is installed properly.

  • Page 135: Spare Parts List

    7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-1 Part Number Description Location(s) Part Number Description Location(s) 442051200001 AC ADPT ASSY;19V/3.16A,DELTA 272073104501 CAP;.1U ,25V,+80-20%,0603,Y5V,SMT C525,C540,C549,C559,C5 541667000031 AK;1-EN,BOX,7521 MTC CTO 272075104701 CAP;.1U ,50V,+80-20%,0603,SMT C143,C149,C160,C165,C1 541667000001 AK;EN,7521-UTILITY ONLY 272072104402 CAP;.1U ,CR,16V,10%,0603,X7R,SMT C10,C501,C517,C527,C53...
  • Page 136 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-2 Part Number Description Location(s) Part Number Description Location(s) 272075222701 CAP;2200P,50V ,+/-20%,0603,X7R,SMT C107 291000010604 CON;HDR,FM,6P*1,1.25MM,ST,SMT 272075221302 CAP;220P ,50V ,5% ,0603,NPO,SMT C23,C31,PC76,PC77 291000012011 CON;HDR,MA,10P*2,1.0MM,ST,SMT 272075220701 CAP;22P ,50V ,+ -10%,0603,NPO,SMT C108,C128 331040060003 CON;HDR,MA,20P*3,.8MM,R/A,AMP J516...
  • Page 137 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-3 Part Number Description Location(s) Part Number Description Location(s) 272625470401 CP;47P*4 ,8P,50V ,10%,1206,NPO,SMT CA501,CA502,CA7,CA8,C 227670000002 END CAP;MANUAL,7521 345669600062 CUSHION;CPU-1,RACE 227670000010 END CAP;W/CARRING BAG,7521 291006214411 DIMM SOCKET;144P,.8MM,AMP353870,SMT 481670000002 F/W ASSY;KBD CTRL,7521+ 288100032013 DIODE;BAS32L,VRRM75V,MELF,SOD-80 PD10,PD11,PD14,PD15,P...
  • Page 138 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-4 Part Number Description Location(s) Part Number Description Location(s) 345669600006 GASKET;IO-PS2,RACE 286303301001 IC;ADP3301AR-5,.8%,REG.,SO,8P 345669600013 GASKET;LAN,RACE 284507005001 IC;CH7005C,TV ENCODER,3/5V,PQFP,44P 345669600041 GASKET;LVDS,9X6X10,RACE 324180786043 IC;CPU,P-III,800MHZ,EB,FCPGA,370P 345669600043 GASKET;MIC,5X5X19,RACE 284504299001 IC;CS4299-JQ,AC97 CODEC,TQFP,48P 345669600042 GASKET;USB,10X15X0.3,RACE 284590363001 IC;DS90C363,LVDS,18BIT,SSOP,48P 345669600005 GASKET;USB,RACE...
  • Page 139 Description Location(s) Part Number Description Location(s) 286100202001 IC;TPA0202,AUDIO AMP,2W,TSSOP,24P 242664800013 LABEL;CAUTION,INVERT BD,PITCHING 286302216001 IC;TPS2216,CARDBUS PWM CTRL,SSOP30P 242600000099 LABEL;MODEL,5M,MITAC 284583601001 IC;W83601R,I2C TO GPIO,SSOP 20P 242600000001 LABEL;PAL,20*5MM,COMMON 284583626001 IC;W83626F,LPC/ISA BRIDGE,PQFP,128P 242600000412 LABEL;PENTIUM,PWR SUITE 3 NOTE BIOS 273000114002 INDUCTER;4.7UH,10%,1206,SMT L522 242668800033 LABEL;WINDOWS ME,CARTON,ORION2 273000990021 INDUCTOR;33uH,CDRH124,SMT...
  • Page 140 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-6 Part Number Description Location(s) Part Number Description Location(s) 412670000005 PWA;PWA-7521,CHARGER TRANS BD MTC 271071143701 RES;14K ,1/16W,0.1% ,0603,SMT 412670000001 PWA;PWA-7521,HDD/FDD BD,T/U MTC 271072151101 RES;150 ,1/10W,1% ,0603,SMT R519,R542,R547,R555,R5 412670000004 PWA;PWA-7521,IQSB TRANS BD,T/U MTC 271071153101 RES;15K ,1/16W,1% ,0603,SMT...
  • Page 141 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-7 Part Number Description Location(s) Part Number Description Location(s) 271071361101 RES;360 ,1/16W,1% ,0603,SMT 271071750101 RES;75 ,1/16W,1% ,0603,SMT R12,R13,R14,R15,R536,R 271071453111 RES;4.53K,1/16W,1% ,0603,SMT PR25 271071822301 RES;8.2K ,1/16W,5% ,0603,SMT R177,R588 271013478301 RES;4.7 ,1/4W,5% ,1206,SMT L31,R21,R24...
  • Page 142 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-8 Part Number Description Location(s) Part Number Description Location(s) 371102030301 SCREW;M2L3,FLT(+),NIB/NLK 370102010604 SPC-SCREW;M2L6,K-HD(+),NIW/NLK,HEAT 371102030303 SCREW;M2L3,K-HEAD(+),NIW/NLK 370103010405 SPC-SCREW;M3L4,NIW,K-HD,T0.3 371102030303 SCREW;M2L3,K-HEAD(+),NIW/NLK 340669600003 SPEAKER ASSY;REDSEA 371102030303 SCREW;M2L3,K-HEAD(+),NIW/NLK 345669600007 SPOGE; CPU,RACE 371102030601 SCREW;M2L6,K-HEAD(+),NIB/NLK 342669600011 STANDOFF;M2DP2H4L5,NIW,RACE 371103030602 SCREW;M3L6,K-HEAD(+),NIB/NLK...
  • Page 143 7521 Plus / N N/B MAINTENANCE 7521 Plus / N N/B MAINTENANCE 9. SPARE PARTS LIST-9 Part Number Description Location(s) 288202301001 TRANS;SI2301DS,P-MOSFET,SOT-23 PQ17,PQ501,Q21,Q22,Q5 288202302001 TRANS;SI2302DS,N-MOSFET,SOT-23 PQ10,PQ13 288204416001 TRANS;Si4416DY,N-MOSFET,.028OHM,SO8 PQ3,PQ502,PQ504,PQ7 288204435001 TRANS;SI4435DY,P-MOSFET,.035OHM,SO8 PQ22,PU2,PU9 288204832001 TRANS;SI4832DY,N-MOSFET,.028OHM,SO8 PQ503,9 288204920001 TRANS;SI4920DY,NCH-DUAL,5.8A30V,SO8 PU4,PU5 288204925001 TRANS;SI4925DY,P-MOSFET,SO-8 PU16 288209410001 TRANS;SI9410DY,N-MOSFET,.04OHM,SO-8 273001050022 TRANSFORMER;10/100 BASE,PH163112SMT...
  • Page 145 MTG118_N_RD30X12 GND_D FD502 FD_DOT040 FD_DOT040 FD_DOT040 FD_DOT040 MTG9 MTG10 MTG11 FD504 FD503 FD501 FD_DOT040 FD_DOT040 FD_DOT040 FD_DOT040 MTG118_N_RD30X12 MTG118_N_RD30X12 MTG118_N_RD30X12 DRAWN DESIGN CHECK ISSUES MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...

  • Page 146: Plus/N Schematics

    0603 C528 BSEL1 0603 4.7U 1206 R526 R522 R515 R514 4.7K 4.7K 4.7K 4.7K VID[0..3] R541 R508 MITAC INTERNATIONAL CORP. VID[0..3] 30 0603 0603 0603 0603 Title 0603 0603 0603 7521 plus VID0 HREQ#[0..4] VID1 Size Document Number HREQ#[0..4] VID2...
  • Page 147 MD36: Enable Ext-PLink MDR36 R613 0603 4.7K MD33: Enable Video Bridge MDR33 R175 0603 4.7K MD39:VGA ECLK and MCLK mode MDR39 R187 0603 4.7K MITAC INTERNATIONAL CORP Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 148 C625 C626 C640 C658 C655 C654 0.1U 0.01U 0.1U 0.01U 0.1U 0.01U 1206 1206 1206 1206 0603 0603 0603 0603 0603 0603 0.1U MITAC INTERNATIONAL CORP Title 0603 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 149 0.1U 0.1U 0.1U C149 0603 0603 0603 0603 R581 0.1U 1206 1206 1206 1206 1206 1206 1206 1206 0603 0603 DACAVSSC DACAVSSB DCLKAVSS ECLKAVSS MITAC INTERNATIONAL CORP Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 150 R585 R583 R591 R598 R592 R597 R596 0603 0603 0603 0603 0603 0603 0603 0603 1210 0603 0603 C648 0.1U C600 0.01U 0603 0603 MITAC INTERNATIONAL CORP Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 151 R1_301 47PX4 47PX4 47PX4 1206 1206 1206 XTALI XTALO 4.7K 0603 14.31818MHZ/NA ADDR 0603 0603 10K/NA 0603 Default mount R48 if TV function required. MITAC INTERNATIONAL CORP Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 152 33.33 14.318 66.7 66.7 33.33 14.318 83.3 83.3 27.78 14.318 14.318 31.67 14.318 126.67 31.67 14.318 37.34 14.318 27.67 14.318 27.67 14.318 0:OFF 1:ON MITAC INTERNATIONAL CORP Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 153 3,10 0603B_DFS +S3V +S3V C212 C238 C261 C151 C259 C210 C195 0.1U/NA 0.1U/NA 0.1U/NA 0.1U/NA 0.1U 0.1U 0603B 0603B 0603B 0603B 0603B 0603B 0603 MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 154 C209 C234 C237 C196 C235 C208 0.1U 0.1U/NA 0.1U 0.1U 0.1U 0.1U/NA 0.1U/NA 0.1U 0.1U/NA 0603B 0603B 0603B 0603B 0603B 0603B 0603B 0603B 0603B MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 155 33/NA 0603 Q501 Q502 +12V RPSOA_8C 2N7002 47PX4 CA501 2N7002 R630 0603 CRTGND CRT_ISOLATE# SiS630S GPIO 9 JL503 JP_NET JP_SMT4_DFS JL504 JP_NET JP_SMT4_DFS CRTGND MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 156 LAN_GND 4,22 P_REQ1# XREQNN EECS R237 OSC1 4,14 AD20 XIDSEL OSCIN R166 0603 0603 4,14 XPAR REXT C277 C213 0603 25MHZ 0.01U OSC_TXC30CO 0603 MITAC INTERNATIONAL CORP Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 157 5.6K R/A-25PX2/0.8 0603B +5VS_CDROM SPEED L541 RP_16P8R_4016 JS503 (+5VS) K211-5X01-050 C679 0 0603 C669 C672 SHORT-SMT4 0.1U 0.1U 1206 0603B 0603B R609 470/NA 0603B MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 158 C572 C620 C622 C628 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0603B 0603B 0603B 0603B 0603B 0603B 0603B 0603B 0603B 0603B MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 159 PCCARD SOCKET 0603B C147 C139 12V1 2.2U 12V2 BEAD_130Z/100M 1206 0805C BEAD_130Z/100M PCIRSTNS# 14,23 C123 C122 C138 0.1U 0.1U 0.1U TPS2216 0603B 0603B 0603B SSOP30 MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 160 273000150036 0805C 0805C BEAD_320Z/100M BEAD_320Z/100M AGND CODEC_XIN CODEC_24M 273000150036 C102 0805C 0603 BEAD_320Z/100M C110 AGND 10P/NA 273000150036 0603 0805C BEAD_320Z/100M 273000150036 0805C BEAD_320Z/100M AGND MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 161 0603B R115 DTA144WK GP1F562T 4.7K SOT23AN_1 0603 U16A JO558 JO559 AMP_SHUTDOWN DTC144TKA PLP3216S AMP_DOWN DECT_HP#/OPT CHOKE_PLP3216S DTC144TKA SPK_OFF# 74AHCT32_V 6,22 SPK_OFF# TSSOP14 DTC144WK DEVICE_DECT# MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 162 IRMD0 L51 BEAD_130Z/100M IRMD1 W83626F C221 PQFP128M_0.5MM 0603 R252 L_GPIO3 680/NA 0603 AVCC3_GND R222 L_GPIO4 680/NA 0603 R223 L_GPIO5 680/NA 0603 BEAD_DFS 0603B_DFS AVCC3_GND MITAC INTERNATIONAL CORP Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 163 R3IN COM1DSR# D/CTS# R2OUT R4IN COM1RXD D/RI# R3OUT R5IN COM1CTS# R4OUT 100K COM1RI# R5OUT 0603B 0.1U 0603B ADM3311ARU TSSOP_SSOP28 6,22 RS232_OFF# DTC144WK MITAC INTERNATIONAL CORP. SOT23AN_1 Title 7521 plus Size Document Number RS232/SIO SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 164 GND1 GND2 KB / PS2 74AHCT32_V GND2 H8_SUSC# TSSOP14 SUSC# JO560 JO561 JO562 JO563 MINI-DIN/6P 47PX4 C10801-106XX MITAC INTERNATIONAL CORP. RPSOA_8C R116 Title 331870006013 JL507 7521 plus 0603B Size Document Number SD411670000002 JP_NET KBD_GND JP_SMT4_DFS Date: Tuesday, May 08, 2001...
  • Page 165 0805C H8/T_DATA BEAD_130Z/100M C271 0603 C262 J515 0.1U 0603 R201 TP_L 0/NA 0603B_DFS R198 TP_R 0/NA 0603B_DFS C251 C248 0603 0603 FPC/FFC-12P/0.5MM 6239-012-001-800 291000151204 MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 166 RPSOE_10 RP60 (+3VS) SA16 SA17 L_GPIO3 SA18 L_GPIO4 SA19 L_GPIO5 RP10KX8 RPSOE_10 R208 R209 4.7K 4.7K 0603 0603 MITAC INTERNATIONAL CORP. IOCHCK# SBHE# Title TP508 SA18 7521 plus SA19 TP509 Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 167 VDD5 +5V51 VDD3 +12V +5VS +3VS CPU_IO CPU_CORE FULL ON STD(SOFT OFF) (ACIN OR BATTERY IN) ADIN MITAC INTERNATIONAL CORP. MECH OFF Title (NO ACIN & NO BATT) 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 168 22/NA 0603 R535 R570 R563 R517 R519 R513 ABITCLK 6,16 0/NA 0603B_DFS 120/NA 0603 0603 0603 0603 0603 FM/0.8MM/H2.4 AMP C-179373 C514 0603 VCC_CMOS MITAC INTERNATIONAL CORP. Title 7521 plus Size Document Number SD411670000002 Date: Tuesday, May 08, 2001 Sheet...
  • Page 169 ADINP EC31QS04 SI4835DY DC2010 PJ501 PL501 2012 PF501 1206 0.02 2012 D/VMAIN BEAD_120Z/100M 6.5A/32VDC 2512 BEAD_120Z/100M EC31QS04 JACK-3P/D2.5/H9.5/W7 PC509 PD501 PR15 0.1U_NA PR16 PR10 DC2010 470K 226K IDJ-D21-6T 0.1U 0.1U RLZ24D 0603B 4.7K_NA 4.7K 0603B 0603B MLL34B 0603 0603B 0603 0805C PR21 100K...
  • Page 170 PQ22 SI4435DY PU16A PU16B SI4925DY SI4925DY PL506 PD19 PL10 ADINP BATT 24,25 BEAD_120Z/100M 33UH PC521 EC31QS04 0805C PC110 IND_CDR127_1 DC2010 PC104 0.01U_NA PC107 PC108 0.01U PC109 PC102 0.1U PR59 PD506 C255 0603 22U_NA 0.01U PR67 R200 0603 1210 PC100 PR61 PR83 0603 ELC01_1...
  • Page 171 D/PWR_ON PL504 D/VMAIN_1 D/VMAIN BEAD_120Z/100M 2012 PR20 PC503 100K_NA PC516 PC511 100U 0603 1000P 0603 1210 1210 PC30 PC32 PC25 PR27 1206 PU501 PR29 PR28 0.1U 0.1U HA178L12UA PQ502 PD505 0_NA 0603 0603 0603 SOT89N SI4416DY BAS32L 0603 0603 PD502 PC514 12V_1 12V_2...
  • Page 172 D/VMAIN PC21 PC22 PC14 0.01U PC15 1000P 10U_NA 0603 1210 1210 0603B INTVCC PU4A PQ16 SI4920DY 2N7002 PR48 SOT23_FET TG1.5. 10UH 100K 0603 THA02P63B D/CPU_PWR_ON_P 1.5V_2 1.5V PR32 SW1.5 0.015 2512 PR41 PC89 9.09K 10UH/4.7A_NA 1000P PC47 PQ15 CHOKE_ETQP1F 0603 0603 0.1U PC70...
  • Page 173 PQ10 S1.8V SI2302DS OPEN-SMT4 +S3V_P SOT23_FET BEAD_120Z/100M 0805C +S5V_P BEAD_120Z/100M +S5V_P 0805C PC51 0.1U PR25 0603 4.53K 0603 +S12V SI4416DY PC39 PC42 PC34 PR22 0.1U 1000P 0805 0805 0603 PC29 0603 0603 PC37 1206 10%,X7R +S5V_P 0805 100K PQ11 PC11 PC17 0603 0.1U...
  • Page 174 VCC_CORE PC124 PC125 PC543 PC545 PC546 PC126 0.01U 150U 150U 150U 150U 150U 7343 7343 7343 7343 7343 0603B PL12 120Z/100M 2012 D/VMAIN PC127 PC128 PC132 PC129 PC130 PC131 1000P EW6.6 0.01U 0603 1210 1210 1210 +S5V_P 0603B PU20 PU21 PU22 PR75 si4894...
  • Page 175 7521P HDD/FDD BD DRAWN DESIGN CHECK ISSUES...
  • Page 176 DESCRIPTION OF CHANGE DATE 1.Base on RACE QSB trans bd r01. 02/15/2000 FDD LED SCROLL_LOCK LED NUM_LOCK LED CAP_LOCK LED HDD LED 7521 7321 QSB0# QSB1# CDROM LED QSB2# QSB3# QSB4# SW_GND DRAWN DESIGN CHECK ISSUES...
  • Page 177 DESCRIPTION OF CHANGE DATE 05/26/2000 1.Relayout base on R00 06/16/2000 2.Correcting J1 shape library. R0B 1.Relayout base on R0A 07/04/2000 2.Add SW1 for H8_RESET function 3.Add PL3 & PL4 for EMI issue 4.Add capacitors for Power issue R01 1.Relayout base on R0b 08/15/2000 2.Remove one of VDD5S circuit 3.Change PF2 from 6.5A/32V to 125V/5A...
  • Page 178 DESCRIPTION OF CHANGE DATE 05/26/2000 1.Relayout base on R00 07/04/2000 2.Remove SW3 & SW4 pin 4 3.Remove 74164 blanking circuit 4.Reverse BATT_G# & BATT_R# pin assignment error 5.Change power source from VDD5 to VDD5S for LEDs 6.Remove the reserved circuit R01 1.Relayout base on R0A 08/15/2000 2.Change Batt LED from BRPG1201W to 19-22SRVGC/TR8...
  • Page 179 DESCRIPTION OF CHANGE DATE 1.Relayout base on R00 08/15/2000 2.Change PF1 from MINISMDC110 to MINISMD0C14-2 3.Change J2 from DF1.3B-2P-1.25v to DF1.3-2P-1.25H 4.ADD C1,C2 for MDC safety 1.Relayout base on R0A 09/07/2000 DRAWN DESIGN CHECK ISSUES...
  • Page 180 7521 Plus/N Sponsoring Editor : Shoestring Tsai Author : Richard.Wang Assistant Editor : Kelly Chiang Publisher : MITAC INTERNATIONAL CORP. Address : 4F, NO.18, PU-DING ROAD, HSINCHU, TAIWAN, R.O.C. TEL : 886-3- 5645850 Fax : 886-3- 5781245 First Edition : Aug. 2001...

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