Epson NX Service Manual

EPSON® NXService ManualPrinted on Recycled Paper.

System DescriptionFront PanelFigure l-2 shows the features on the front panel of the system. Table l-2 describes the frontpanel features.Figure 1-2 Fr

AdaptecAHA-1504BFigure A-19 Adaptec Jumper LocationsTable A-20Adaptec Default SettingsEpson NX Service ManualA-21

Connector Pin AssignmentsTable A-21Adaptec Jumper SettingsA-22 Epson NX service Manual

Adaptec Jumper Settings ContinuedEpson NX Service ManualA-33

List of AbbreviationsList of AbbreviationsA-24Epson NX Service Manual

Reference MaterialsEpson NX Service Manual A-25

System UtilitiesSystem UtilitiesContentsRunning the SETUP Program...B-lStarting the SETUP Program Stored in ROM..

Option 1, Format...B-26Modifying the Defective Track Table...B-27Formatting t

System UtilitiesRunning the SETUP ProgramIf components were removed from, replaced, or upgraded in the computer, run the SETUPprogram to define the ne

Running the SETUP ProgramStarting the SETUP Program Stored in ROMTo start SETUP, make sure there is no diskette in the diskette drive. Then turn on t

System UtilitiesSelecting OptionsA solid cursor bar highlights the option currently selected.using the up and down arrow keys ( or ).You can sc

System OverviewRear PanelFigure l-3 shows the features on the rear panel of the system. Table 1-3 describes the rearpanel features.Figure 1-3 Rear Vie

Running the SETUP ProgramSetting the Date and TimeTo change the date and/or time, follow these steps:1Press F3. You see the date prompt:234The cursor

5Now you see the time prompt:If the time is correct, press Enter.If the time needs to be changed, type in the current hour (hh), then minutes (mm), an

Running the SETUP ProgramSetting the Processor Speed OptionsThere are three processor speed options available to customize the system’s processing spe

System UtilitiesSetting the Fast Boot OptionEnabling the Fast boot option allows the power-on diagnostic testing to skip certainsystem memory tests. T

Running the SENTUP PromgramSetting the Keyboard OptionsThere are four keyboard options available:0Keyboard function0Keyboard delayclKeyboard speed0Num

System UtilitiesSetting the Built-in l/O Port OptionsThe I/O (input/output) port options let you define how the following ports operate:LJPrimary para

Running the SETUP ProgramSetting the Port ConfigurationThe I/O (input/output) port address options let you define the address for the following ports

System UtilitiesSetting the PasswordThe default setting is Not set. To set a password press Enter. You see the messagebelow on the help line:<F2>

Running the SETUP ProgramDefining Your Own Drive TypeIf the parameters for the hard disk (listed in its documentation) do not match any of the typesl

System UtilitiesSetting the Non-cache AreasThe computer automatically caches all the system memory except two non-cache addressareas listed in the tab

System DescriptionOptionsIn addition to the standard configurations, the following are available:clAn optional 3½-inch or 5¼-inch diskette driveci3½-i

Running the SETUP ProgramSetting the Cache Test and User Control OptionsUsing SETUP, you can enable or disable the computer’s internal cache (built in

System Utiliti8sPerforming System DiagnosticsThis section describes how to test the operation of your computer and its peripheral devicesusing the Sys

Performing System DiagnosticsStarting the System Diagnostics ProgramFollow these steps to start the System diagnostics program:1Insert the Reference d

System UtilitiesDeleting TestsTo remove devices from the Items Detected list so the system diagnostics program cannottest them, follow these steps:1Pr

Performing System DiagnosticsAdding TestsIf you want to add devices to the Items Detected list, follow these steps:1Press <- or -> to select Add

System UtilitiesRunning TestsFollow these steps to run a test from the Execute menu:1Press <- or -> to select Execute. You see the following Exe

Performing System Diagnostics34Note56If there is only one test for a device, the program begins testing immediately. If thereis more than one test for

System UtilitiesSystem Diagnostics TestsThe table below lists all the system diagnostics tests you can run on your system.Table B-6System Diagnostics

Performing System DiagnosticsError MessagesThe following table lists all the error messages that may appear during system diagnosticstesting.Table B-7

System UtilitiesEpson NX Service ManualB-23

System OverviewDocument SourcesEmissions and Safety Agency InformationThe Epson NX in a typical configuration meets or exceeds the requirements of the

Formatting a Had DiskFormatting a Hard DiskThis section describes how to low-level (or physically) format a hard disk. This procedureshould not be con

System UtilitiesFomatting a New DiskTo format a new hard disk that has never been formatted, select the Format option. Youmay need to modify the defec

Formatting a Had DiskOption 1, FormatIf you selectFormat from the Hard Disk Format Menu, you see the following (for a diskwith no defective track tabl

System UtilitiesTo enter a new value, select N. You see the following prompt:Enter new skewed sectors per head in format (O-16):Enter the recommended

Formatting a Hard DiskFotmatting the DiskWhen you are ready to start formatting the disk, you see the following warning:WARNING! ALL DATA WILL BE DEST

System UtilitiesOption 2, Destructive Surface AnalysisYou can perform a destructive surface analysis of your hard disk to accurately locate any badtra

Formatting a Hard DiskOption 3, Non-destructive Surface AnalysisThe non-destructive surface analysis does not destroy any data, and you can use it to

Sytem UtilitiesAdditional UtilitiesThe Reference diskette contains the following additional utilities:0ESPEED0HDSIT.Changing the Processor SpeedThe co

C SchematicsContentsCPU Circuitry ...C-3Video Circuitry (Part 1)...

CPU CircuitryEpson NX Service Manual C-3

System DescriptionEnvironmental SpecificationsTable l-5 lists the. environmental specifications for the Epson NX.Table l-5Environmental Specifications

Video Circuitry ( Part 1 )Epson NX Sevice ManualC-4

System end Virtual Cache Controller CircuitryEpson NX Servlce ManualG5

Peripheral and I/O Controller CircuitryEpson NX Service ManualC-6

SIMM and Memory circuitryEpson NX Service ManualG7

Epson NX Sew/w ManualC-8Wingine/Virtual Memory Controller circuitry

VGA Feature CircuitryEpson NX Service ManualC-9

Keyboard/Mouse Controller Circuitry Epson NX Service ManualC-10

Riser Board Connector circuitryEpson NX Service ManualC-11

Power Supply and Reset CircuitryEpson NX Service ManualC-12

Supplemental PAL CircuitryEpson NX Service ManualC-13

Subassembly DescriptionsSubassembly DescriptionsThis section gives descriptions and specifications for the following subassemblies:0CaseclSystem board

Video Circuitry (Part 2)Epson NX Service ManualC-14

IndexAAbbreviations A-24Abnormal shut down2-20Acronyms, list ofA-24Adaptec SCSI card A-21jumpersA-22 - A-23Address mapmemory1-15system I/O A-3Agency i

LED 3-20LED connector l-11, A-16mounting rails 3-13power connector A- 19problems 2-13removing 3-123-15 - 3-16specifications 1-19Hardware interrupts A-

removing3-17replacing3-18shut down 2-8Power-on diagnostics2-3, 2-7, B-lProblemsblankscreen2-8, 2- 11boot2-14diskette drive2-12general 2-7hard disk2-13

UUpgradingBIOS 1-16CPUl-5vVertical refreshB-14VGABIOS 1-9feature connectorl-11, A-17portl-11port connector A-7VideoBIOS B-7DRAM 1-9, 1-16Virtual Cache

System DescriptionCaseThe multi-piece case unit is shown in Figure l-5 and described in Table 1-6, below.Table 1-6Case SpecificationsSystem BoardFigur

Subassembly DescriptionsFigure l-6 System Board Components1-10Epson NX Service Manual

System DescriptionConnectors and JumpersThis section describes the connectors and jumpers on the main system board. The location ofeach connector and

Subassembly DescriptionsJumpersThe location of each jumper is shown in Figure l-6. A jumper’s setting is determined bywhere the jumper is placed on a

Revision LevelCopyright Information© 1993, Epson America, Inc.20770 Madrona AvenueTorrance, CA 90509All rights reserved. No portion of this document m

System DescriptionPower SupplyThe computer has a 145-watt power supply with switch-selectable AC input voltage. Thepower supply is a totally self-cont

Subassembly DescriptionsTable 1-12Power Supply SpecificationsFigure l-8 shows the power supply cable layout and connectors.1-14Epson NX Service Manual

System DescriptionMemoryThe 170MB and 240MB HDD configurations for this system have 4MB of memory solderedon the system board and one 16MB SIMM instal

Subassembly DescriptionsShadow RAM128KB of the remaining first 1MB of DRAM is used to shadow the system BIOS and VGABIOS. Shadow RAM is address select

System DescriptionMemory ExpansionThe system board has two SIMM sockets, SIMM1 and SIMM2. The SIMMs that you installshould be single- or double-sided

Subassembly DescriptionsMass StorageThe system can support up to three mass storage devices. A hard disk drive can be installedin the horizontal drive

System DescriptionSpecifications for the Conner CP30174E HDDTable 1-16Specifications for the Quantum LPS525S HDDTable 1-18Quantum LPS525S 52SMB SCSI H

Subassembly DescriptionsConner CP-30174E17O MB IDE HDDMaster = C/D jumperedSlave = C/D not jumperedQuantum LPS240AT24OMB IDE HDDMaster = DS jumpered

System DescriptionTable 1-19Quantum LPS525S Jumper Settingsbus (to be used when drive is*Factory default jumper settingEpson NX Service Manual1-21

Subassembly DescriptionsKeyboardThe system includes a detached keyboard that connects to the computer through a coiledcable. Adjustable legs allow you

FCC Comdiance Statement for American UsersThis equipment has been tested and found to comply with the limits for a Class B digitaldevice, pursuant to

Troubleshooting2 TroubleshootingContentsGeneral Information...2-lRecommended Service Tools...

TablesTable 2-l Recommended Service Tools...2-lTable 2-2Authorized Replacement Modules...2-2Table 2-3P

General InformationThis chapter describes the various procedures you can follow to diagnose problems with thesystem. The diagnostics are broken down i

Epson Authorized Replacement ModulesTable 2-2 lists the authorized replacement modules for the Epson NX. The reference letterassigned to each module i

Power-On Diagnostics and Boot ErrorsThe computer’s ROM BIOS contains a series of diagnostic programs, called Rower-OnDiagnostics (ROD). These programs

Power-On Diagnostics and Boot Errors2-4Epson NX Service Manual

*Replacement of these components is performed only by authorized service centers outsidethe U.S. Servicers in the U.S. should replace the system board

Error Beep CodesError Beep CodesIf the POD detects an error but cannot display an error message, the computer sounds anerror tone code. The tone code

TroubleshootingGeneral System ProblemsThis section describes problems you may encounter with systems that do not produce PODerror messages. A series o

General System ProblemsComputer Doesn’t StartIf the Rower LED is on, see “Video Problems” on page 2-10. If the Rower LED is off, turnoff the power and

FCC Compliance Statement for American UsersDOC Compliance Statement for Canadian UsersThis digital apparatus does not exceed the Class B limits for

TroubleshootingKeyboard ProblemsIf there is a problem with the computer’s keyboard, see the suggestions below:Figure 2-2Keyboard ProblemsNo Keyboard R

Genera/ System ProblemsSticking KeysWhen the keys are sticking, follow these suggestions:1Make sure the keyboard’s upper and lower cases are properly

TroubleshootingBlank ScreenIf the power LED is on but the screen is blank, follow these suggestions:Make sure the monitor cables are securely connecte

General System ProblemsDiskette Drive ProblemsIf there is a problem with the diskette drive, see the suggestions below:Figure 24Diskette Drive Problem

TroubleshootingHard Disk ProblemsIf there is a problem with the hard disk drive, see the suggestions below:Figure 2-5 Hard Disk ProblemsNewly-installe

General System ProblemsHard Disk Boot FailureWhen the computer starts but does not load the operating system, follow these suggestions:1Run the SETUP

TroubleshootingParallel Printer ProblemsIf there is a problem using a printer from the parallel port, follow the suggestions below:Figure 2-7 Parallel

General System ProblemsSerial Port ProblemsIf there is a problem using a serial device from a serial port, follow the suggestions below:Figure 2-8 Ser

TroubleshootingOption Card ProblemsIf there is a problem using an option card, follow the suggestions below:Figure 2-9Option Card ProblemsMake sure th

General System ProblemsMemory Module ProblemsIf there is a problem using a SIMM, follow the suggestions below:Figure 2-10 Memory Module Problems1If th

About this ManualThis manual is designed to be used with the Epson NX system.Chapter 1, System Description, includes the overall system specifications

TroubleshootingMouse ProblemsWhen the computer boots properly but does not respond when you move the mouse, followthe suggestions below:1278Figure 211

General System ProblemsTroubleshooting with the NeXTSTEP Operating SystemAs has been described previously, you can diagnose hardware problems for the

Removing and Replacing SubassembliesRemoving and ReplacingSubassembliesContentsGeneral Service Information... ...3-

FiguresFigure 3-l Removing the Cover Retaining Screws...3-4Figure 3-2Removing the Cover...3-5Figure

Removing and Replacing SubassembliesGeneral Service InformationThis chapter provides instructions for removing and replacing the major subassemblies o

System UnitSystem UnitThis section describes how to remove and replace the components of the main system unit.Removing the CoverWARNINGBe sure to grou

Removing and Replacing Subassemblies6Turn the computer around again so that the front panel is facing you.7Grasp the sides of the cover and pull it st

System UnitReplacing the CoverTo replace the computer’s cover, follow these steps:1Facing the front of the computer, position the cover so the lips on

Removing and Replacing SubassembliesRemoving an Option CardFollow these steps to remove an option card that has been installed in the computer in orde

System UnitRemoving the Option Slot CoverFollow these steps to remove the option slot cover so you can install an option card:1Remove the cover as des

System DescriptionSystem DescriptionContentsSystem Overview...1- 1GeneralFeatures...

Removing and Replacing SubassembliesInstalling an Option CardThe computer has four 16-bit option slots located on the option card connector board anda

System UnitRemoving the Option Card Riser BoardFollow these steps to remove the option card riser board:1Remove the computer’s cover as described on p

Removing SlMMsRemoving and Replacing SubassembliesIf you need to remove SIMMs from the computer, follow these steps:Remove the computer’s cover as des

System UnitInstalling SlMMsFollow these steps to install SIMMs:1Remove the computer’s cover as described on page 3-2.2Remove any option cards that may

Removing and Replacing SubassembliesInstalling Another ProcessorYou can install a future Intel OverDrive processor in the Epson NX system, when it bec

System Unit8Run the SETUP program immediately to update the computer’s configuration with thenew information.Removing a Drive From the Horizontal Posi

Removing and Replacing SubassembliesInstalling a Drive In the Horizontal PositionNoteOn an IDE drive, set any necessary jumpers and take note of the

System Unit6If you are installing a diskette or tape drive in the lower drive bay, locate the diskettedrive cable; one end is connected to the upper d

Removing and Replacing SubassembliesRemoving a Hard Disk Drive From the Vertical PositionFollow these steps to remove an IDE hard disk drive in the ve

System UnitInstalling a Hard Disk Drive In the Vertical PositionFollow these steps to install a hard disk drive:NoteOn an IDE drive, set any necessary

FiguresFigure l-lSystem Overview...1- 1Figure l-2FrontView...l-3Figure l-

Removing and Replacing SubassembliesRemoving the Power SupplyFollow these steps to remove the power supply:1Remove the computer’s cover as described o

System UnitReinstalling the Power SupplyFollow these steps to reinstall the power supply:Position the main chassis so its right side is facing you.Att

Removing and Replacing SubassembliesRemoving the SpeakerFollow these steps to remove the speaker:Remove the cover (see page 3-2) and any option cards

System UnitRemoving the LEDsFollow these steps to remove the LEDs:1Remove the cover (see page 3-2) and any option cards that may be in the way (seepag

Removing and Replacing SubassembliesRemoving the BIOS EPROMsFollow these steps to remove the BIOS EPROM chips from sockets Ul and U113:1Remove the co

System UnitRemoving the System BoardFollow these steps to remove the system board:1Remove the cover (see page 3-2), any option cards (see page 3-5), a

Removing and Replacing SubassembliesReplacing the System BoardFollow these steps to replace the system board:1From the left side of the chassis, inser

System UnitReplacing the Front BezelFollow these steps to replace the front bezel:1Set the cover upside down on a smooth flat surface and gently push

Reference MaterialsAReference MaterialsContentsHard Disk Drive Types...A-lSystem I/O Address Map...

FiguresFigure A-l Auxiliary Fan Connector...A-7Figure A-2 VGA Port Connector...A-7Figure

System DescriptionSystem OverviewThe Epson NX desktop computer is an advanced, high-performance desktop system fullycompatible with Industry Standard

Hard Disk Drive TypesEpson NX Service ManualA-l

Had Disk Drive TypesA-2Epson NX Service Manual

System l/O Address MapEpson NX Service Manual A-3

System I/O Address MapA-4Epson NX Service Manual

DMA AssignmentsEpson NX Service ManualA-5

Hardware InterruptsA-6Epson NX Service Manual

Reference MateriaIsConnector Pin AssignmentsThis section describes the pin assignments of each connector in the system.Auxiliary Fan ConnectorThe auxi

Connector Pin AssignmentsSpeaker ConnectorThe speaker connector (CN3) is a 4-pin, male header connector, accessible from inside thecomputer and locate

Parallel Port ConnectorThe parallel port connectar (CNS) is a 25-pin, D-shell female connector, accessible from therear of the computer. Figure A-5 sh

Connector Pin AssignmentsIDE Hard Disk Drive Data ConnectorThe IDE hard disk drive data connector (CN6) is a 40-pin, header connector, accessible from

System OverviewGeneral FeaturesThe following features are standard:clclPcl0clclclDcl0Dcl00clclIntel i486DX2/66 CPUPGA CPU-type ZIF socket that can als

Reference MaterialsDiskette Drive Data ConnectorThe diskette drive data connector (CN7) is a 34-pin header connector, accessible from insidethe comput

Connector Pin AssignmentsKeyboard and Mouse ConnectorsThe mouse (CN9) and keyboard (CNlO) connectors are 6-pin mini DIN receptacles,accessible from th

Battery ConnectorThe battery connector (CNll) is a 2-pin, male header connector, accessible from inside thecomputer and located on the system board Fi

Connector Pin AssignmentsPower Supply ConnectorsThe power connector (CN13) is a 12pin male header connector. It is located on the systemboard and supp

Reference MaterialsTable A-12Option Card Riser Board Connector Pin AssignmentsEpson NX Service ManualA-15

Connector Pin AssignmentsHDD Access LED ConnectorThe HDD access LED connector (CN15) is a 2-pin, male header connector, accessible frominside the comp

VGA Feature ConnectorThe VGA Feature connector (CN17) is a 26-pin header, accessible from the inside of thecomputer. Figure A-15 shows the connector a

Connector Pin AssignmentsOption Slot ConnectorsThe option slot connectors on the riser board are 98-pin, female receptacles. Figure A-16shows one of t

Drive Power ConnectorsConnectors PA through PC are functionally the same and provide power to disk and tapedrives. PD has a different shape, but has t

Connector Pin AssignmentsSMC Ether Card PLUS Elite16 ComboThe SMC EtherCard PLUS Elite16 Combo is a 16-bit, ISA-compatible Ethernet adapter cardthat s