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MiTAC 7521 N Service Manual & Troubleshooting Manual

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SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR
7521
7521
： ： ： ：
： ： ： ：
BY
Jesse .Jan
BY
Jesse .Jan
TESTING TECHNOLOGY DEPARTMENT / TSSC
TESTING TECHNOLOGY DEPARTMENT / TSSC
MAR. 2001
MAR. 2001

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Summary of Contents for MiTAC 7521 N

  • Page 1 SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR SERVICE MANUAL & TROUBLESHOOTING GUIDE FOR 7521 7521 ： ： ： ： ： ： ： ： Jesse .Jan Jesse .Jan TESTING TECHNOLOGY DEPARTMENT / TSSC TESTING TECHNOLOGY DEPARTMENT / TSSC MAR.

  • Page 2: Table Of Contents

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE CONTENTS 1. HARDWARE ENGINEERING SPECIFICATION…………………….. 2. DEFINITION & LOCATION CONNECTORS/ SWITCHES………….. P.40 3. DEFINITION & LOCATION MAJOR COMPONENTS……………….. P.44 4. PIN DESCRIPTIONS OF MAJOR COMPONENTS …………………… P.47 5. SYSTEM VIEW & DISASSEMBLY ………………………………………. P.60 6.

  • Page 3: Hardware Engineering Specification

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 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.

  • Page 4: Hardware System

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

  • Page 5: Cpu Module

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.2.2 CPU MODULE • Intel Pentium Ⅲ/ Celeron Processors with 370 pins PGA package. • Pentium Ⅲ 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 •...
  • Page 6 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 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.
  • Page 7 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 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]...
  • Page 8 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 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...
  • Page 9 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 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...
  • Page 10 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 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...
  • Page 11 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Cooperate with iS Video Bridge ?to support - NTSC/PAL Video Output - Digital LCD Monitor - Secondary CRT Monitor Low Pin Count Interface Forwards PCI I/O and Memory Cycles into LPC bus Translates 8/16 bit DMA cycles into PCI bus cycles Advanced PCI H/W Audio &...
  • Page 12 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE RTC Day-of-Month, Month-of-Year Alarm LED Blinking in S0, S1, S2, S3 PCI Bus Power Management Interface Spec. 1.0 Integrated DMA Controller Two 8237A Compatible DMA Controller 8/16 bit DMA data transfer Distributed DMA Support Integrated Interrupt Controller Two 8237A Compatible DMA Controller Two 8259A Compatible Interrupt Controllers...
  • Page 13 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Integrated Keyboard Controller Supports PS/2 mouse interface Password security and password power-up System sleep and power-up by Hot-Key KBC and PS2 mouse can be individually disabled Integrated Real Time Clock (RTC) with 256B CMOS SRAM Supports ACPI Day-Month and Month-of-Year- Alarm 256 Bytes of CMOS SRAM Provides RTC H/W Year 2000 Solution...
  • Page 14 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE I²C Bus/SMBus Series Interface Plug and Play Compatible High-Performance 32-Bit PCI Bus Master Architecture with Integrated Direct Memory Access (DMA) Controller for Low CPU and Bus utilization Supports PCI Device ID, Vendor ID / Subsystem ID , Subsystem Vendor ID Programming through the EEPROM interface Implements Optional PCI 3.3v Auxiliary Power Source 3.3Vaux Pin and Optional PCI IEEE 802.3 and 802.3u Standard Compatible...
  • Page 15 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE IrDA 1.0 / IrDA 1.1 / SHARP ASK - Baud rate: max. 4Mb - Link distance: 0.01 to 1 m - Half angle: ±15…⌡ .Βιτ∃Error Rate (BER) : 10 - Peak wavelength: 0.85 - 0.90 mm. TQFP 100 pins Standby mode: control by software Default configuration :...
  • Page 16 7521 N/B MAINTENANCE 7521 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. Supports five PCI memory windows and two I/O windows available to each PC CARD16 socket.
  • Page 17 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Provides socket activity LED signals. Provides zoom video support signals. Provides zoom video port function in socket B. 208-Pin LQFP package 1.2.7 DUAL-SLOT PC CARD POWER INTERFACE SWITCH: TPS2206 Fully Integrated Vcc and Vpp Switching for Dual-Slot PC Card Interface P 2 C3-Lead Serial Interface Compatible With CardBus Controllers 3.3 V Low-Voltage Mode Meets PC Card Standards...
  • Page 18 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.2.8 Keyboard system: H8(3434F) universal keyboard controller - Two-way general register configuration - Eight 16-bit registers or Sixteen 8-bit registers - High-speed operation - Maximum clock rate: 16Mhz at 5V Memory - Include 32KB ROM and 1KB RAM 16-bit free-running timer - One 16-bit free-running counter - Two output-compare lines...
  • Page 19 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Keyboard controller - Controls a matrix-scan keyboard by providing a keyboard scan function with wake-up - Interrupts and sense ports A/D converter - 10-bit resolution - 8 channels : single or scan mode (selectable ) D/A converter - 8-bit resolution - 2 channels...

  • Page 20: Memory System

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Battery charging control Smart Battery monitoring Control D/D system on/off Fan control and LED indicator serial interface 100pin TQFP 1.2.9 Memory System 1.2.9.1 Main Memory HYUNDAI : GM72V281641AT-7K SDRAM NEC : UPD45128163G5-A80-9JF SDRAM - one chip memory size: 4Banksx1Mx16bit SDRAM. - Standard 54 pin TSOP-II package.
  • Page 21 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7521 Supports 64 MB SDRAM on board and one 144pin DIMM socket for upgrading up to 320MB DRAM . Here are some main memory system essential characteristics: - One chip 4Banksx1Mx16bit on board 64 MB - 144-pin S.O.
  • Page 22 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Battery translation board connection between M/B and battery. Quick start buttons translation board (QSB) connection between M/B and five Buttons. Internet quick start button translation board (IQSB) connection between M/B and touch pad, five LEDs, two Buttons. FDD-HDD translation board connection between M/B and floppy, hard disk.
  • Page 23 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Line in * 1(3.5 mm phone-jack) Built-in Speaker * 2 (1w, 8 ohm) Built-in Microphone * 1 Note: For Those Input Source Not Using Should Be Set Mute In Order To Reduce Noise. Like Line In 1.2.12 IR MODULE: HSDL-3600#007 Fully Compliant to IrDA 1.1 Specifications - 115.2 kb/s to 4 Mb/s operation...
  • Page 24 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE Single Rx Data Output - FIR Select pin switch to FIR Integrated EMI Shield - Excellent noise immunity Edge Detection Input - Prevents the LED from long turn-on time Interface to various Super I/O and Controller Devices Designed to Accommodate Light Loss with Cosmetic Window Minimum External Components Required...

  • Page 25: Special Feature Function

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.2.13 Special Feature Function 1.2.13.1 Hot Key Function Keys Combination Feature Meaning Fn + F5 LCD/external CRT Rotate display mode in LCD only, CRT only and switching simultaneously display. Fn + F6 Brightness down Decreases the LCD brightness / No function in DSTN model Fn + F7...
  • Page 26 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.2.13.2 Quick Start Button function Keys Feature Meaning Mail Received Button (or IQSB function “Recognizable Determined by Software component. Signal”) ESB1 Entertainment Quick Key Determined by Software component. ESB2 Instant Internet Determined by Software component. ESB3 My Presario Determined by Software component.

  • Page 27: Led Indicators

    1.2.13.3 Flash ROM (BIOS) 7521 system utilizes the state-of-the-art Flash EEPROM technology. User can upgrade the system BIOS in the future just running the program from MiTAC. 1.2.13.4 LED Indicators System has ten status LED indicators to display system activity which include above keyboard and below touch pad: 1.

  • Page 28: Smm And System Bios

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.2.13.5 COM port assignment COM1: MODEM / RS-232 / Disable COM2: IR / RS-232 / Disable 1.3 SMM and System BIOS 1.3.1 System Management Mode 7521 system has built in several power saving modes to prolong the battery usage for mobile purpose. User can enable and configure different degrees of power management modes via ROM CMOS setup (booting by pressing F2 key).

  • Page 29: Suspend Mode

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.3.1.4 Suspend Mode The most chipset of the system is entering power down mode for more power saving. In this mode , the following is the status of each device. 1.3.1.4.1 Suspend to DRAM: CPU: off SiS630: Partial off VGA: off...

  • Page 30: Other Power Management Functions

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.3.1.5 Other power management functions 1.3.1.5.1 HDD & Video access System has the ability to monitor video and hard disk activity. User can enable monitoring function for video and/or hard disk individually. When there is no video and/or hard disk activity, system will enter next PMU state depending on the application. When the VGA activity monitoring is enabled, the performance of the system will have some impact.

  • Page 31: System Bios

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.3.1.5.5 Battery Low State After Battery Warning State, and battery capacity is below 4%, system will generate beep for twice second. 1.3.1.5.6 Battery Dead State When the battery voltage level reaches 9 volts, system will shut down automatically in order to extend the battery packs' life. 1.3.2 System BIOS 1.3.3 Fan power on/off management FAN is controlled by H8 embedded controller which using LM45 to sense CPU temperature and PWM to control fan speed.
  • Page 32 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE - Back-light unit : CCFL, 1 tube - DC for Panel : 3.3V+-0.3V - Pixel pitch : 0.279(H)X0.279(V) - Power supply current : 320 mA (Typ) - Lamp start Voltage : 1500Vrms (25 ℃) 1.5.2 HDD FUJITSU MHK2120AT : 12 GB Capacity —...

  • Page 33: Floppy Disk Drive

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.5.3 Keyboard External keyboard: Supports IBM 106 key compatible keyboard - Key pitch : 19 mm - Windows95 applied Internal keyboard: Compatible Japanese keyboard layout (90 keys) 1.5.4 Floppy Disk Drive Mitsumi D353G Using High density ( 2HD ) 3.5 inch disk Data transfer rate: 500k bits/sec Disk rotational speed: 300 rpm for 2mode, 360rpm for 3mode Track density: 135 tpi...

  • Page 34: Touch Pad

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.5.5 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 35 7521 N/B MAINTENANCE 7521 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 36 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.5.8 CD-R/RW drive MATSUSHITA: UJDA310 - WRITE 4X-Speed - READ max 20X-Speed (CD-RW max 14X-Speed) - PIOMODE: 16.6MB/s ; Mode 4 - DMAMODE: 4.2MB/s ; Mode 0 - Write: 150KB/s (Normal speed), 300KB/s(2X speed), 600KB/s(4X speed) - Buffer memory: 2MB - Access speed 150ms (Typ.) 1.5.9 LED Indicators...

  • Page 37: Cmos Battery

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.5.10 IR port HP HSDL-3600#007 FIR Module - Meet IrDA Physical Layer Specification - 1 cm to 1 Meter Operating Distance - 30 degree Viewing Angle - Support Two Channels - 2.4 Kb/s to 115.2Kb/s and 1.15Mb/s to 4.0 Mb/s 1.5.11 CMOS Battery CR2032 3V 220mAh lithium battery When AC in or system main battery in , CMOS battery will no power consumption.

  • Page 38: Pcmcia Socket

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.5.13 PCMCIA socket Operating temperature range : -55 ℃- +85 ℃ Insertion force : 39.2N (MAX) 10000 times insertion and withdrawal at the cycle rate 400- 600cycles/hour and no evidence of breakage and cracks on the component. In +85 ℃...
  • Page 39 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.6 Appendix 1: GPIO definitions GPI DEFINITIONS Signal Function Description During After S4/S5 Remark Name PCIRST# PCIRST# GPIO[0] OC0# USB OVER CURRENT High High High GPIO[2] RST_CDROM Reset CD-ROM drive High High High GPIO[3] EEDO FOR LAN Defined GPIO[4] KBD_US/JP#...
  • Page 40 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 1.6 Appendix 2: GPIO definitions GPI DEFINITIONS Note 1. LCD ID LCD_ID2 LCD_ID1 LCD_ID0 Vendor PANEL Description HUYNDAI 14X13 Note 3. CPU & SDRAM Frequency setting table: SW_FS3 SW_FS2 SW_FS1 SW_FS0 SDRAM...

  • Page 41: Definition & Location Connectors/ Switches

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 2. DEFINITION & LOCATION OF CONNECTORS/SWITCHES 2.1 Mother Board-A DIP SW J1:Inverter BD CONN. J4: External MIC-in connector. SW1: Cover Suspend SW. J2: LCD panel connector. J5: Internal keyboard connector. SW2: Power button. J3: Quick key transfer BD connector. DIP SW : CPU FSB SELECT J6: 144 pins expansion SDRAM socket.
  • Page 42 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 2. DEFINITION & LOCATION OF CONNECTORS/SWITCHES 2.2 Mother Board-B J506 J505 J507 J504 PJ501 J502 J508 J503 U501 BT501 J509 U502 J510 J511 VR501 U503 J513 J512 U507 J516 J514 J515 Power jack ( AC adapter). J508: USB connector.
  • Page 43 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 2. DEFINITION & LOCATION OF CONNECTORS/SWITCHES 2.3 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. to M/B.
  • Page 44 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 2. DEFINITION & LOCATION OF CONNECTORS/SWITCHES 2.4 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. SW500: CMOS Reset J2: Internal speaker connector.

  • Page 45: Definition & Location Major Components

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 3. DEFINITION & LOCATION OF MAJOR COMPONENTS 3.1 Main Board ( Side A ) U13: ICS9248-102 Frequency Synthesizer. U1: ADM3311ARU RS232/SIO. U31:W83626 LPC to ISA. U17: TPS2206 PCcard Power switch matrix. U2: DS90C363MTD VGA LVD controller. U15,U20,U25,U29 : On board SDAM.
  • Page 46 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 3. DEFINITION & LOCATION OF MAJOR COMPONENTS 3.2 Main Board ( SIDE B ) U502 U503 U505 U502: PH163112 LAN Controller. U503: Socket 370 CPU. U505: PCI1225PDV PC CARD interface controller.
  • Page 47 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 3. DEFINITION & LOCATION OF MAJOR COMPONENTS 3.3 Definition Of Daughter Board MDC/LAN transfer board Charger board (side A) Charger board (side B) SW500 J500...

  • Page 48: Pin Descriptions Of Major Components

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. PIN DESCRIPTIONS OF MAJOR COMPONENTS 4.1 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 GTL+...
  • Page 49 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. PIN DESCRIPTIONS OF MAJOR COMPONENTS 4.1 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 50 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. PIN DESCRIPTIONS OF MAJOR COMPONENTS 4.1 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 51 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. PIN DESCRIPTIONS OF MAJOR COMPONENTS 4.1 Pentium III/Celeron FC-PGA2 CPU Alphabetical Signal Reference Signal Name Signal Description PICCLK The PICCLK (APIC Clock) signal is an input clock to the processor 2.5V and system logic or I/O APIC that is required for operation of the Tolerant processor, system logic, and I/O APIC components on the APIC bus.
  • Page 52 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. PIN DESCRIPTIONS OF MAJOR COMPONENTS 4.1 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 53 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. PIN DESCRIPTIONS OF MAJOR COMPONENTS 4.1 Pentium III/Celeron FC-PGA2 CPU PWRGOOD Relationship at Power On Signal Name Signal Description VID[4:0] The VID[4:0] (Voltage ID) pins/balls can be used to support Open- automatic selection of power supply voltages. These pins/balls are not drain signals, they are either an open circuit or a short to VSS on the processor substrate.
  • Page 54 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. Pin Descriptions Of Major Components SiS630 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 Attr CPUCLK 3.3V/5V MAIN Host Clock : BPRI# 1.5V...
  • Page 55 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. Pin Descriptions Of Major Components SiS630 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 Attr AD[31:0] 3.3V/5V MAIN I/O PCI Address /Data Bus: INIT# 1.5V~5V...
  • Page 56 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. Pin Descriptions Of Major Components SiS630 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 IIOW[A:B]# 3.3V MAIN Primary/Secondary Channel IOW# Signals STOP# 3.3V/5V MAIN...
  • Page 57 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. Pin Descriptions Of Major Components SiS630 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 VDQM[7:0] 3.3V MAIN O Display Memory SDRAM Input /Output Mask VMA11 3.3V MAIN...
  • Page 58 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. Pin Descriptions Of Major Components SiS630 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 Attr THERM# 3.3V/5V MAIN Thermal Detect : THERM# is connected to the PMDAT 3.3V/5V...
  • Page 59 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. Pin Descriptions Of Major Components SiS630 Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset Fast Ethernet and Homenetworking interface RTC Interface Name Tolerance Power Type Description Name Tolerance Power Type Description Plane Attr Plane Attr AUXOK 1.8V...
  • Page 60 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 4. Pin Descriptions Of Major Components SiS630 Slot 1/Socket 370 2D/3D Ultra-AGP™ Single Chipset USB interface Power and Ground Signals Name Tolerance Power Type Description Name T olerance Power Type Description Plane Attr Plane Attr CLK48M 3.3V/5V...

  • Page 61: System View & Disassembly

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5 System View and Disassembly 5.1 System View 5.1.1 Front View Mail-Received Button/Indicator Power Indicators Top Cover Latch 5.1.2 Left-Side View Audio Input Connector Microphone Connector Audio Output Connector Volume Control PC Card Slots Floppy Disk Drive...
  • Page 62 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.1.3 Right-Side View Battery Pack CD-ROM/DVD-ROM Drive IR Port 5.1.4 Rear View Power Connector PS/2 Port USB Ports Parallel Port Serial Port RJ-45 Connector VGA Port RJ-11 Connector Kensington Lock...
  • Page 63 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.1.5 Bottom View CPU Cover Modem Card Cover FDD/HDD Module Battery Pack 5.1.6 Top-Open View LCD Screen Power Button Keyboard Touchpad Stereo Speaker Set Easy Start Buttons...

  • Page 64: System Disassembly

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2 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. NOTE: Before you start to install/replace these modules, disconnect all peripheral devices and make sure the notebook is not turned on or connected to AC power.

  • Page 65: Battery Pack

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.1 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 5-1) Figure 5-1 Reassembly 1.
  • Page 66 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.2 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 5-2) Figure 5-2 Figure 5-3 3. Remove four screws fastening the heatsink and disconnect the fan’s power cord to free the heatsink from the CPU module.
  • Page 67 7521 N/B MAINTENANCE 7521 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. (figure 5-4) Figure 5-4 Reassembly 1.

  • Page 68: Modem Card

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.3 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 5-5) Figure 5-5 Figure 5-6 3. Remove one screw fastening the connector board and the grounding cable. (figure 5-6)
  • Page 69 7521 N/B MAINTENANCE 7521 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 5-7) Figure 5-7 Reassembly 1. Reconnect the modem card into the system board and secure with two screws. 2.
  • Page 70 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.4 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 5-8) Figure 5-8...
  • Page 71 7521 N/B MAINTENANCE 7521 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 5-9) Figure 5-9 Figure 5-10 4.
  • Page 72 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.5 CD-ROM Drive Disassembly 1. Carefully put the notebook upside down. 2. Remove the battery pack. (See section 5.2.1 Disassembly.) 3. Remove the modem card. (See section 5.2.3 Disassembly.) 4. Remove the FDD/HDD module. (See step 2 in section 5.2.4 Disassembly.) 5.
  • Page 73 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 6. Hold the CD-ROM drive and slide it outward carefully. (figure 5-12). Figure 5-12 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 74 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.6 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 5-13) Figure 5-13 Figure 5-14 3.
  • Page 75 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.7 SO-DIMM Disassembly 1. Remove the keyboard to access the SO-DIMM sockets. (See section 5.2.6 Disassembly.) 2. Pull the retaining clips outwards ( ) and remove the SO-DIMM ( ). (figure 5-15) Figure 5-15 Reassembly 1.

  • Page 76: Lcd Assembly

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.8 LCD Assembly Disassembly 1. Open the top cover and remove the Easy Start panel. (See steps 1 to 2 in section 5.2.6 Disassembly.) 2. Remove the two hinge covers by inserting a flat screwdriver to the rear of the cover and pry the cover out.
  • Page 77 7521 N/B MAINTENANCE 7521 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. Replace the two hinge covers. 4.
  • Page 78 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.9 LCD Panel Disassembly 1. Remove the LCD assembly. (See section 5.2.8 Disassembly.) 2. Remove the two rubber pads and two screws on the lower part of the panel. (figure 5-18) Figure 5-18 Figure 5-19 3.

  • Page 79: Inverter Board

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.10 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 80: System Board

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.11 System Board Disassembly 1. Remove the Keyboard. (See section 5.2.6 Disassembly.) 2. Remove the LCD assembly. (See section 5.2.8 Disassembly.) 3. Remove seven screws, and then take out the Easy Start board. (figure 5-21) Figure 5-21 Figure 5-22 4.
  • Page 81 7521 N/B MAINTENANCE 7521 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 5-23) Figure 5-23 Figure 5-24 7. Lift up the speaker assembly and disconnect the cable. (figure 5-24)
  • Page 82 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 8. Remove four screws to take the recharge board apart. (figure 5-25) Figure 5-25 Figure 5-26 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. (figure 5-26) Reassembly 1.
  • Page 83 7521 N/B MAINTENANCE 7521 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 84 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 5.2.12 Touchpad Disassembly 1. Remove the system board. (See section 5.2.11 Disassembly.) 2. Remove the four screws to lift up the touchpad holder and touchpad panel. (figure 5-27) Figure 5-27 Reassembly 1. Replace the touchpad holder and touchpad panel, and secure with four screws. 2.

  • Page 85: Maintenance Diagnostics

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 6. Maintenance Diagnostics Introduction Introduction Each time the computer is turned on, the system bios runs a seri Each time the computer is turned on, the system bios runs a seri of internal checks on the hardware. This power on self test (post) allows of internal checks on the hardware.
  • Page 86 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 6. Maintenance Diagnostics 6.2 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. Initialize color adapter Initialize chipset.
  • Page 87 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 6. Maintenance Diagnostics 6.2 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 Initialize BIOS data area at 40:0.
  • Page 88 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 6. Maintenance Diagnostics Diagnostic Tools : Diagnostic Tools : PIO CONNECTOR PIO CONNECTOR P/N:411904800001 CIRCUIT: DESCRIPTION :PWA;PWA-378PORT DEBUG BD CIRCUIT: Note:Order it from MIC/TSSC PIN1 : STROBE PIN 13 : SLCT PIN1 : STROBE PIN 13 : SLCT CONNECTOR CONNECTOR...

  • Page 89: Trouble Shooting

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7. TROUBLE SHOOTING 7.1 NO POWER 7.2 NO DISPLAY 7.3 VGA CONTROLLER FAILURE LCD NO DISPLAY 7.4 EXTERNAL MONITOR NO DISPLAY 7.5 MEMORY TEST ERROR 7.6 KEYBOARD TEST ERROR OR TRACK PAD TEST ERROR 7.7 CD-ROM DRIVE TEST ERROR 7.8 HARD DRIVE TEST ERROR 7.9 USB PORT TEST ERROR...

  • Page 90: No Power

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.1 NO POWER: When the power button is pressed, nothing happens ,power indicator does not light up. 1. Check AC Adaptor. 2. Check OUTLET. 22.5V 2.67A 3.Check Charge B’D OUTLET Power Jack MOTHER BOARD J514 Charge B’D...

  • Page 91: Circuit Diagram

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.1 NO POWER: When the power button is pressed, nothing happens ,power indicator does not light up. PJ501 F5, U32 PL1, PF1 POWER IN +S5V VDD5 PWR_VDDIN VDD5S PD1, PD3, VMAIN ADINP D/VMAIN PQ502 PQ503,PU9 +S3V_P +S3V...
  • Page 92 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.1 NO POWER: Symptom: Symptom: When the power button is pressed, nothing happens, no fan activi When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up ty is heard and power indicator is not light up SI4835DY ADINP...
  • Page 93 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.1 NO POWER: Symptom: Symptom: When the power button is pressed, nothing happens, no fan activi When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up ty is heard and power indicator is not light up No power Board level...
  • Page 94 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.1 NO POWER: Symptom: Symptom: When the power button is pressed, nothing happens, no fan activi When the power button is pressed, nothing happens, no fan activi ty is heard and power indicator is not light up ty is heard and power indicator is not light up CONTINUE CHECK:...

  • Page 95: No Display

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.2 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 96 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.2 NO DISPLAY ******System Clock Check ****** U503 U16 U21 CPUCLK FC-PGA U26 U30 SDRAMCLK2 630PCLK U15 U20 AJ14 U25 U29 SDRAMCLK3 630SDCLK AJ15 R104 USB_48MHZ SODIMM APICCLK SDRAMCLK0 HCLK_CPU CLK14_VGA SDRAMCLK1 R140 R141 32.768K U505 SIS 630...
  • Page 97 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.2 NO DISPLAY ******Power Good & Reset System ****** 2.5V +S12V +S5V_P +3V_P PWROK CPU_PWRGOOD 1.5V RESET# U503 1.8V MAX809 VCC_CORE 7521 Power FC-PGA Module +S3V CPURST# H8_PWRON R606 SIS_PWRBTN# R133 RSTDRY D/CPU_PWR_ON PCIRST# Super I/O CPU_PWR_ON PC97338VJG...

  • Page 98: Vga Controller Failure Lcd No Display

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.3. VGA CONTROLLER FAILURE LCD NO DISPLAY There is no display or picture abnormal on LCD. +12V R190 5 6 7 8 ENABKL_VGA R196 LID_OPEN# FPVCC 1 2 3 ENABKL_VGA# BLADJ LCD COVER SW FA6,FA8,FA10 RP7,RP9,RP11 FA7,FA9,FA11...

  • Page 99: Vga Controller Failure Lcd No Display

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.3. 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 100: External Monitor No Display

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.4 EXTERNAL MONITOR NO DISPLAY There is no display or picture abnormal on CRT monitor. L514 J506 L511 GREEN L510 BLUE SIS 630 L509 R205 HSYNC L515 R206 VSYNC R256 L513 DDDA R621 CRT MONITOR R261 L508 R620...
  • Page 101 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.4 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. 2.

  • Page 102: Memory Test Error

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.5 MEMORY TEST ERROR Either on board or extend SDRAM is failure or system hangs up. DCLK[2,3] SDRAMCLK[0~3] ICS9248-102 ON BOARD 64MB SDRAM Clock Synthesizer CKE[2,4] RP21,RP24,RP26,RP27 RP39,RP42,RP51,RP50 MD[0~63] R139 MAB#[0~14] DQMA#[0~7] RP38 SDCLK CS#[0~3] CSA#[0~3] CSA#[2,3]...
  • Page 103 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.5 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 104 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.6 KEYBOARD(K/B) TOUCH-PAD(T/P) TEST ERROR Error message of keyboard failure is shown or any key doesn’t work. KBD_US/JP# RP519 KI[0~7] KO[0~15] SIS630 RP17 J502 K/M CLK IOW# M DATA PS/2 Mouse IOR# K/M DATA H8/3434F M CLK IRQ1...
  • Page 105 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.6 KEYBOARD(K/B) TOUCH-PAD(T/P) 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. Check if K/B or T/P cable installed Check if U12, J5, J515 and J502 properly.

  • Page 106: Cd-Rom Drive Test Error

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.7 CD-ROM DRIVE TEST ERROR An error message is shown when reading data from CD-ROM drive. CD_RST# RST_CDROM +5VS_CDROM JS501 38,39 40,41 C641 C645 RP55, RP47 RP48, RP49 SDD[0~15] RDDS[0~15] J513 RSDIOW SDIOW# RDAS[0:2] SDA[0:2] CD-ROM RCS[1,3]S#...
  • Page 107 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.7 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 trans board. 2.

  • Page 108: Hard Drive Test Error

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.8 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. R242 +5VS_HDD PCIRST# JS14 1,3,4 C237...
  • Page 109 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.8 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. Board-level Troubleshooting for hard drive test error.

  • Page 110: Usb Port Test Error

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.9 USB PORT TEST ERROR An error occurs when a USB I/O device is installed. J508 F502 USB_B1 USB_OC0# F503 USB_A1 USB_OC1# RP25 USBP0+ L100 D/USBP0+ USB_B3 USBP0- D/USBP0- USB_B2 GND1 L101 USBP1+ D/USBP1+ USB_A3 GND2 D/USBP1-...
  • Page 111 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.9 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. 2. Confirm USB driver is installed Check the following parts for cold solder or one of the following Correct parts on the mother-board may be defective, use an oscilloscope...

  • Page 112: Audio Failure

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.10 AUDIO FAILURE No sound from speaker after audio driver is installed. AUDIO IN +12V INTERNAL MIC1 C381 ADP3301AR-5 J509 EXT MIC. L516 L502 ASDIN0 J503 L535 R505 LINE_IN/L ASDOUT L536 R501 LINE_IN/R LINE IN ASYNC L501 R502...
  • Page 113 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.10 AUDIO FAILURE No sound from speaker after audio driver is installed. AUDIO OUT W83626F 24.576MHZ R207 L63 CODEC XIN J514 ROUT+ TPA0202 ROUT- CHARGE AOUT_R Amplifier LOUT+ LOUT- AC97_RST# RHP IN VR501 RLINE IN AC97_SDOUT LLINE IN LHP IN...
  • Page 114 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.10 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. 2. Make sure all the drivers are installed Check the following parts for cold solder or one of the following parts on the properly.

  • Page 115: Sio Port Test Error

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.11 SIO PORT TEST ERROR An error occurs when a mouse or other I/O device is installed. D/RTS# COM1RTS# J507 D/TXD COM1TXD D/DTR# COM1DTR# SUPER I/O ADM3311 PC97338VJG D/DSR# COM1DSR# D/CTS# COM1CTS# D/RI# COM1RI# D/DCD# COM1DCD# COM1RXD...
  • Page 116 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.11 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 117: Pio Port Test Error

    7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.12 PIO PORT TEST ERROR When a print command is issued, printer prints nothing or garbage. P_STB# D/STB# D/AFD# PD/AFD# J505 PD/INIT# D/INIT# D/SLIN# PD/SLIN# IRQ7 PD/ACK# D/ACK# PC97338VJG D/BUSY PD/BUSY SUPER I/O D/PE PD/PE PRINTER D/SLCT...
  • Page 118 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.12 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. Confirm CMOS LPT port and extended mode setting properly.
  • Page 119 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.13 PC-CARD SOCKET FAIL An error occurs when a PC card device is installed. +12V VPPAOUT PCLKCARD CARD_VCCA 32K_CARD TPS2206 AD[0:31] POWER SWITCH MATRIX C/BE[0:3] SLOT A ACD[0:15] TRDY# ACA[0:25] U505 IRDY# AIOWR#/AIORD# Pc-card PCI1225PDV RESET# AINPACK#/AREG#...
  • Page 120 7521 N/B MAINTENANCE 7521 N/B MAINTENANCE 7.13 PC-CARD SOCKET FAIL 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. 2.
  • Page 121 PQ10 SI2302DS S1.8V OPEN-SMT4 +S3V_P SOT23_FET BEAD_120Z/100M 0805C +S5V_P BEAD_120Z/100M +S5V_P 0805C PC45 0.1U PR23 0603 5.23K +S12V SI4416DY 0603 PC37 PC39 PC35 PR22 0.1U 1000P 0805 0805 0603 PC28 0603 0603 PC36 1206 10%,X7R +S5V_P 0805 100K PQ11 PC11 PC18 0603 SCK431LCSK-0...
  • Page 122 VCC_CORE PC38 PC501 PC502 PC515 150U 150U 150U 150U PC104 7343 7343 7343 7343 0.01U 0603B D/VMAIN PD12 BAS32L_NA PC64 120Z/100M MLL34B 10U_NA 2012 PC76 1206 PD19 BAS32L 1210 PR32 MLL34B PC26 PC115 PC13 D/CPU_PWR_ON_P PC27 PC105 PC23 22U_NA 0603 680K_NA 0.01U 1000P...

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