Acer Extensa 670 Service Guide
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4-22Theory of Operation A simplified block diagram of the Super I/O controller is provided in Figure 4-13.Configuration RegistersUART (16550 or 16450)UART + IrDA/HP & Sharp IR (16550 or 16450) General Purpose RegistersPower Down LogicIEEEE1284 Parallel Port Hifh Current Driver Floppy Disk Controller with Digital Data Separator (Enhabced 8477)I/O PortsControl InterruptDataHandshakeFloppy Drive Interface OSCInterrupt and DMAFloppy Drive Interface InterruptIR Interface Serial Interface Interrupt Serial Interface Config. Inputs Figure 4-13NS87336VJG Chip Simplified Block Diagram
Service Guide4-23 4.3.9 ESS1878 Audio Controller with Interface to Expansion Audio Mixer The ES1878 is a member of the ESS family of audio controllers that includes the ES1868. It shares most of the features of the ES1868. and includes new features, such as support for the expansion audio mixer chip, the ES978, and a new IIS serial port and stereo D/A converter. A 4-wire expansion analog bus and 2-wire serial control bus connect the ES1878 and the ES978 Features · Hot-dock interface to expansion audio mixer (ES978) · Plug-and-Play support using internal resource ROM. · Monophonic full-duplex using two DMA channels. · Self-timed joystick port (digital joystick) · Support for up to 7 general purpose outputs and 7 general purpose inputs that can be slaved with corresponding pins of ES978 in expansion unit · IIS interface to intemal stereo D/A for external ZV port or MPEG audio · Completely general interrupt mapping, including sharing all interruptsGNDD A0A1A2A2A4A5A6A7A8A9A10A11AENVDDD D0D1D2D3D4D5D6D7 GNDDSWD XlVDDD RESET DOCKED IIMCLKllLRIISLCKIIDATA MSDMCLKFSDCLKDRDX GNDD MSIMSOVDDDXSCXSDGNDA XA0XA1XA2XA3GPI1 GPIO GNDD PCsPKI XO GPO0 GPO1 GPO2 DRQC / GPI2 DACKBC / GPI3 DRQB DACKBB DRQA DACKBA MUTE / GPI6 VOLUP / GPI5 VOLDN / GPI4 IRQE / GPO6 IRQD / GPO5 IRQC / GPO4 IRQC / GPO3 IRQA IORB IOWB VDDDPCSPKO AOUT_R AOUT_L LINE_R LINE_L CIN_R CIN_L FOUT_L FOUT_R VDDA VREF GNDA MIC CMR AUXA_R AUXA_L AUXB_R / FDXO AUXB_L / FDXI TA TB SWC SWB SWA TD TC 100 12526 51 50 75 76 Figure 4-14ES1878 Chip Pinouts
C h a p t e r 5 C h a p t e r 5 Troubleshooting ProceduresService Guide5-1 5.1. Introduction This chapter provides an overview of the fault isolation process, provides guidelines for isolating 67x Series computer malfunctions to replaceable subassemblies and provides instructions for executing diagnostics and interpreting error messages. 5.2. Overview of Fault Isolation Process The fault isolation process (summarized in Figure 5-1) consists of the following steps: · Notebook power system (including battery packs and AC adapter connections) · Switch settings (ensure Power is On) · Press the Shift key to ensure that Notebook is not in Suspend mode · Verify if computer is configured to boot from the A: Drive or C: Drive. · Check LCD brightness adjustment (press Fn-Up Arrow keys to increase brightness) · Ensure that computer is not set for external monitor (press Fn-F12 to select internal screen) · Record and attempt to resolve any displayed error messages or error beeps (refer to Paragraph 5.2.3.1 and Tables 5-1 and 5-2) · Try rebooting the system (Ctrl-Alt-Del) · If the computer is capable of running the Setup program; check the serial and parallel port configurations, Sound System enable/disable, and other features that may affect system operation. · Remove and replace suspect hardware (as described in Chapter 6 of this manual) and retest the system.
5-2Troubleshooting Procedures 5.3. Troubleshooting Procedures The built-in self test program and the disk resident diagnostics program (PC-Doctor) are useful tools in computer troubleshooting. However, if the computer has a power, keyboard or display problem, you must first solve this problem before running diagnostics. If the computer powers up and displays messages on the LCD or emits a series of beeps, skip to Paragraph 5.3.3 for further instructions. 5.3.1 Troubleshooting a Power Supply Problem If the computer does not power up when the Power Switch is pressed ON, you most likely have a malfunction in the power subsystem (loss of power at the AC outlet, faulty AC adapter, discharged Battery Packs, or faulty Power Supply on the Main Board). With a power problem, all LEDs are extinguished, the LCD screen is blank, the system does not respond when the suspend switch is pressed several times consecutively and no drive activity can be heard. The computer is unable to load software and displays no visible signs of activity. To fault isolate a power problem, check the following: · AC adapter and Battery - Plug in the AC adapter and double-check all connections on the adapter and computer. Ensure that the Notebook Power switch is set to the On position and that the system is not in Suspend or sleep mode. · Measure the voltage at the AC outlet or plug in a known good appliance (e.g. a lamp) to verify that voltage is present. If the voltage is ok, try replacing the AC adapter. · Check to see that the battery packs are installed correctly and that the battery charge indicators on the front of the battery packs indicate the batteries are charged (try using a new battery pack if batteries are discharged). · If the AC outlet voltage, AC adapter, and battery packs test normal but the computer will not power up, try disconnecting the display cable from the base (refer to Chapter 6 for disassembly instructions) then connect an external monitor to see if a short in the display assembly has occurred. 5.3.2 Troubleshooting a Display Problem If the LCD remains blank when you turn on the computer, and the status indicators light, check the following controls on the display): · LCD suspend mode - press Shift to terminate Suspend mode. · Brightness set too low - press Fn-Up Arrow keys to increase screen brightness · Notebook Set for External Monitor - press Fn-F12 to switch to the internal screen. · Faulty LCD - Replace the LCD panel as described in Chapter 6 of this manual. Table 5-1 contains fault isolation information for Display Problems on the notebook. Symptoms are listed along the left side of the chart and the various Display FRUs are listed along the top of the chart. Within the body of the table are the probabilities of each of the FRUs causing that particular problem. For example, a single display line on the screen is most likely caused by the LCD Panel or Display Cable; other components have a low probability of causing the problem.
Service Guide5-3 Table 5-1Display Troubleshooting Guide Problem DescriptionInverter BoardLCD PanelDisplay CableMother BoardBIOSSingle line on LCD display (horizontal or vertical)LowHighMediumLowLowMultiple lines on display (horizontal or vertical)LowMediumMediumLowLowSections of the display are missing charactersLowMediumMediumLowLowScrambled DisplayLowMediumLowMediumMediumIntermittent characters on displayLowMediumMediumMediumLowBright display, no visible charactersLowMediumMediumMediumLowBrightness level fluctuating or display blinking on/offHighLowMediumLowLowDisplay goes dim over timeHighMediumLowLowLowDim display but characters very visibleMediumMediumLowLowLowVery dark display and characters are slightly visible when a light is directed at surface of the displayHighLowLowLowLowVery dark display and no characters are visibleLowHighHighMediumLow5.3.3 Fault Isolation Using Self Test When the computer is first powered up, it automatically performs a self test of its central hardware and memory functions. During self test (which lasts for a few seconds), the display shows copyright and version number information. Note:Some procedures in this paragraph require you to use keystroke sequences, such as Ctrl- Alt-Del. To execute a keystroke sequence such as this, you must press all three keys simultaneously. 5.3.3.1 Self Test Error Messages Upon successful completion of the self test, the computer automatically loads its operating system and other built-in utilities. If the self test fails to complete successfully, the display shows one of the error messages described in Table 5-2. Note: In the event of a hardware problem that affects the display, the Notebook also communicates errors via a series of beeps. The interpretation of the beep codes is provided in Table 5-3. Table 5-2Self Test Error Messages Error MessageExplanationDiskette drive 0 failureThis message indicates the internal floppy disk (drive A) has failed (or is not installed on the computer). Press Ctrl-Alt-Esc to ensure that drive type is correctly set (3.5 inch, 1.44 MB) in BIOS Setup. Run the Diagnostics to check Drive A as described in Paragraph 5.4. Also try using a new, correctly formatted disk.
5-4Troubleshooting Procedures Table 5-2Self Test Error Messages Error MessageExplanationDiskette read failure - strike F1 to try to retry bootThis message indicates the disk is defective or not formatted. Try another known good formatted disk and press F1. Fixed disk failure This message indicates the system disk drive failed to complete the self test or that the nonvolatile random-access memory (NVRAM) is configured incorrectly for the installed drive type. Ensure that the notebook is configured to boot from the C: Drive. Press Ctrl-Alt-Esc to ensure that the hard disk drive type is correctly identified in Setup (should be default for the internal hard disk drive). Press the Ctrl-Alt-Del keys to attempt to reboot the system. If the error occurs a second time, run the diagnostics as described in Paragraph 5.4.Fixed disk read failure - strike F1 to retry bootThis message indicates that the hard disk drive improperly formatted, or that a hardware failure has occurred in the hard disk drive subsystem. Press Ctrl-Alt-Esc to ensure that the hard disk drive type is correctly identified in Setup (should be default for the internal hard drive). If the booting process still fails, run the diagnostics as described in Paragraph 5.4.Invalid configuration informationThis message indicates the computer has been configured incorrectly. Check the settings in the Setup program menu. Also, NVRAM battery failure (resulting in loss of configuration data) can generate this error message. Install an AC adapter and recharge the system. If the problem persists, replace Top Board.Keyboard clock/data line failureThis message indicates either the keyboard or the external keyboard (if one is installed) is defective. If the computer has an external keyboard connected, check the connection to ensure that it is connected correctly.Keyboard stuck key failureThis message indicates the self test has detected a stuck key on the keyboard. Try the keyboard keys to determine if they appear to be working properly and reboot the computer. Note: Also, ensure that no key is pressed during power up and that no keys are jammed. If the self test still fails, execute the diagnostics as described in Paragraph 5.4.No boot device available - press F1 to retry boot.This message indicates the system disk, the disk drive, or the disk is defective (if loading MS-DOS from disk) or that the NVRAM is not correctly configured for the installed disk drive type. Replace the disk and reboot the computer.No boot sector on system disk - press F1 to retry bootThis message indicates the system disk is not formatted. Try powering down the system and re-running the self test. Press Ctrl-Alt-Esc to ensure that the drive type is correctly set in Setup. Also, press F1 to try loading MS-DOS from the hard disk drive again. If the message persists, the disk must be reformatted and software reloaded from disks (refer to Chapter 3).Non-System Disk or Disk error. Replace and press any key when ready.This message indicates the disk installed in floppy disk Drive A is not a bootable disk. Format an MS-DOS bootable disk and install the disk in Drive A, Reboot the computer. Also try pressing Ctrl-Alt-Esc to ensure the disk drive type is correctly set in Setup.Time-of-day clock stoppedThis message indicates that the battery sustaining the system configuration has failed. Reset the configuration. Note: The following messages are informational messages that do not necessarily indicate a self test failure.NNN Main Memory, NNN ExtendedThis message lists the amount of standard memory and optional extended memory that has tested successfully during self test execution. This message is only displayed if Quick Boot is off in System Setup.Memory tests terminated by keystrokeThis message tells you that you have pressed the Space Bar while the memory tests were running. Pressing the Space Bar during memory testing stops the tests.
Service Guide5-5 Table 5-2Self Test Error Messages Error MessageExplanationPress F1 to continue This message tells you that an error was found during self test execution. Press F1 to attempt to reboot the computer.Save-to-Disk file is too smallThis message occurs when you add memory. Use the MS-DOS program PHDISK to increase the size of the save-to-disk file.Save-to-disk file is missingUse the MS-DOS program PHDISK to create a new save-to-disk file.Swap File is missingUse the MS-DOS program PHDISK to create a new swap file.5.3.3.2 Self Test Beep Error Messages In the event of a hardware problem that affects the display, the Notebook also communicates errors via a series of beeps. These codes may be heard over the systems speaker as three bursts of beeps. The interpretation of the beep codes is provided in Table 5-3. To recover from a self test error, try cycling power to the computer. Also, press Ctrl-Alt-Esc to ensure that the Setup configuration is correct. In general, most of the failures are associated with the Motherboard and may require board removal/replacement. Table 5-3Self Test Beep Messages Beep CodePort 80hDescriptionNone01hCPU Register Test in Progress1-1-302hCMOS Write/Read Failure1-1-403hROM BIOS Checksum Failure1-2-104hProgrammable Interval Timer Failure1-2-205hDMA Initialization Failure1-2-306hDMA Page Register Write/Read Failure1-3-108hDRAM Refresh Verification FailureNone09h1ST 64K RAM Test in Progress1-3-30Ah1ST 64K RAM Chip or Data line Failure1-3-40Bh1ST 64K RAM Odd/Even Logic Failure1-4-10ChAddress Line Failure, 1ST 64K RAM1-4-20DhParity Failure, 1ST 64K RAM2-1-110hBit 0, 1ST 64K RAM Failure2-1-211hBit 1, 1ST 64K RAM Failure2-1-312hBit 2, 1ST 64K RAM Failure2-1-413hBit 3, 1ST 64K RAM Failure2-2-114hBit 4, 1ST 64K RAM Failure2-2-215hBit 5, 1ST 64K RAM Failure2-2-316hBit 6, 1ST 64K RAM Failure2-2-417hBit 7, 1ST 64K RAM Failure2-3-118hBit 8, 1ST 64K RAM Failure2-3-219hBit 9, 1ST 64K RAM Failure2-3-31AhBit A, 1ST 64K RAM Failure2-3-41BhBit B, 1ST 64K RAM Failure
5-6Troubleshooting Procedures Table 5-3Self Test Beep Messages Beep CodePort 80hDescription2-4-11ChBit C, 1ST 64K RAM Failure2-4-21DhBit D, 1ST 64K RAM Failure2-4-31EhBit E, 1ST 64K RAM Failure2-4-41FhBit F, 1ST 64K RAM Failure3-1-120hSlave DMA Register Failure3-1-221hMaster DMA Register Failure3-1-322hMaster Interrupt Mask Register Failure3-1-423hSlave Interrupt Mask Register FailureNone25hInterrupt Vector Loading In Progress3-2-427hKeyboard Controller Test FailureNone28hCMOS Power Failure and Checksum in ProgressNone29hCMOS Configuration Validation in Progress3-3-42BhScreen Memory Test Failure3-4-12ChScreen Initialization Failure3-4-22DhScreen Retrace Test FailureNone2EhSearch for Video ROM in progress1-22EhCirrus Video Chip Failure1-32EhCirrus RAM DAC or Video RAM FailureNone30hScreen Believed Operable; running with Video ROMNone31hMonochrome Monitor Believed OperableNone32hColor Monitor (40 Column) Believed OperableNone33hColor Monitor (80 Column) Believed Operable4-2-134hNo Time Tick4-2-235hShutdown Failure4-2-336hGate A20 Failure4-2-437hUnexpected Interrupt in Protected Mode4-3-138hMemory High Address Line Failure at 010000h-0A0000h4-3-33AhTimer Chip Counter 2 Failed4-3-43BhTime of Day Clock Stopped4-4-13ChSerial Port Failure4-4-23DhParallel Port Failure4-4-33EhMath Coprocessor Failure
Service Guide5-7 5.3.4 PCMCIA Modem Problems If an optional PCMCIA modem does not work properly, check the following items: · Dialing problem or wrong number - Try dialing a number that you have previously dialed successfully. · Faulty phone line - Connect a telephone to the line and listen for a dial tone. · Software program - Check to ensure that you have installed the software correctly.
C h a p t e r 6 C h a p t e r 6 Field ServiceService Guide6-1 6.1. Introduction This chapter contains general preventive and corrective maintenance procedures that apply to all members of the Extensa 67x Series Notebook Computers. The first part of the chapter describes the computer cleaning procedures and preferred handling procedures for sensitive components (e.g. disk drives, batteries). The second part of the chapter identifies all field-replaceable parts; the remainder of the chapter contains removal and replacement procedures for the field-replaceable parts. 6.2. Preventive Maintenance Preventive maintenance is limited to cleaning the plastic case, keyboard and the display screen. 6.2.1 Cleaning the Computer When it is necessary to clean the plastic case and keyboard use a soft, lint-free cloth, slightly dampened with a mild detergent solution or use the contents of any commercially available computer cleaning kit. Caution: Never spray any liquids directly on the computer case, keyboard, or screen. If the liquid- crystal display (LCD) screen has become smeared or dusty, clean the screen first with a soft, clean, lint-free cloth and gently wipe the glass. If the glass is still smeared, use distilled water or a 25% solution of alcohol and distilled water. Caution:Do not use paper towels to clean the display screen. Paper can scratch the display screen matte. 6.2.2 Handling the Computer The notebook computer requires reasonable care and handling for extended life. Some of the precautions to follow to protect your computer against accidental damage include: · Never pick up or carry the unit by the cover · Do not force the cover beyond its fully opened position (about 180 degrees) · Never subject the computer to harsh environments (dusty areas or areas of rapidly changing temperatures) · Never place anything on top of the computer, particularly when it is operating or charging (could result in overheating and damage to the computer). · Never move the computer while the hard drive is rotating (press the Suspend button to put the computer in a Sleep mode before closing cover). · Never expose the computer hard disk drive(s) or disks to strong magnetic fields such as those generated by transformers, speakers, or telephone handsets.