Epson 3865X/20 PLUS 140

The math coprocessor socket is located on the front right side of the main system board, as shown below.

math coprocessor socket

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front

Carefully follow these steps to install an Intel 80387SX math coprocessor:

1.Remove the math coprocessor from its package and set it aside.

2.Remove the computer’s cover and the subassembly. See Chapter 5 for instructions.

6-20Installing and Removing Options

Contents

Page Page Page Page IMPORTANT SAFETY INSTRUCTIONS Page Introduction Chapter 1 Setting Up Your System Chapter 2 Running the Setup Program Continuing From an Error Message Moving the Chapter 3 Using Your Computer Special Keys Chapter 4 Enhancing System Operations Batch Chapter 5 Accessing Internal Components Chapter 6 Installing and Removing Options Chapter 7 Installing and Removing Disk Drives How Hard Disk Drives Appendix A Troubleshooting A-1 A-2 B-4 B-5 B-7 B-10 B-12 Page Page Optional Equipment Operating Systems and Other Software VGA Utilities How to Use This Manual Where to Get Help Setting Up Your System 1 Choosing a Location Page 2 Removing the Protector Card 3 Connecting a Monitor pins II J Page Connecting a Printer or Other Device Page Page Page Connecting the Keyboard 6Connecting the Mouse Although the keyboard connectors are AUTOEXEC.BAT Connecting the Power Cord Turning On the Computer Page Page Page Automatic Configuration Starting the Setup Program screen displays the Operation OPERATION MENU 1 - Setup 2- Format hard disk 3- System diagnostics error 1 6 2 - System options not set (Run SETUP in REFERENCE DISK) (Resume = "F1" key) F1 Exit Display Password Cache memory Processor speed Page Display VGA CGA 40 column CGA 80 column Monochrome 80 column CGA EGA, MCGA, VGA or other Remap VGABIOS EGA, MCGA VGA or other Setting the Power-onPassword Power-onpassword already installed Shift Network server mode off Page Page Processor speed I Speed: High The cursor High Automatic Page Normal Keyboard/Sound Speaker Enabled Initial num lock Normal on or Initial num lock and press Enter Setting the Real-timeClock Time Date Time xx:xx:xx hh:mm:ss (hh mm-dd-yyyy Setting the Hard Disk Drive Configuration Enter. You Drive 1: User defined I Type 60 fined I Number of cylinders 776 of cylinders Number he ads Enter SAVE SETTINGS disk drive(s) installed in your computer. You need Setup program Setup Hard disk drive types (continued) Setting the Diskette Drive Type(s) Setting the Serial/Parallel Interfaces Follow these steps to change your built-in settings: 1. At the menu,highlight Serial/Parallel. The Reviewing Your Settings Setup press PgDn. You PgDn. You Page Page Page Page Special Keys on the Keyboard Key Purpose Alt Works Caps Lock, Num Lock Scroll Lock Stopping a Command or Program Resetting the Computer Del Page &or you the computer RESET 123, type: Page Page disk Drive and diskette incompatibilities Drive type Diskette types it can read from and write to Page Page Page write-protect Page Page Also, be sure to Page Page Backing up the hard disk Caring for your hard disk drive move Preparing the hard disk for moving Enter to Enter: Enhancing System Operations Using AUTOEXEC . BAT and Other Batch Files Changing the Processor Speed require the ESPEED Ctrl Alt + Ctrl Alt Ctrl Alt (20 /Low /Auto Alt RESET ESPEED ESPEED /A accesses Entering the ESPEED command in a batch file SAMPLE SAMP Reassigning the Diskette Drives press Enter: AFDD New Assign Present 1.44MB Page RESET RESET Page Page Page Accessing Internal Components Removing the Cover Page Page Removing the Subassembly Page Page Replacing the Subassembly Page computer, fitting the Page caution Page Page Page Replacing the Cover firmly on all edges to form a tight seal Installing and Removing Options Changing the Jumper Settings Jumper number setting Function - J Page Installing an Option Card Page Page 6-8 Installing and Removing Options Removing an Option Card Adding Memory Modules 256KB, 1MB 12MB 14MB Note Follow these steps to install the memory modules: SIMM Page below Installing Page Page tab SIMM Installing a Math Coprocessor Page Page Removing a Math Coprocessor Post-installationSetup Page Installing and Removing Disk Drives Using the Correct Drive Bay How to Use This Chapter Setting the Hard Disk Drive Jumpers Follow the instructions in the next section to change the jumper Hard disk drive jumper settings Page Page Page Page Page Page (If Page Page and Page 7. Hold the subassembly up slightly as you lower the drive onto right Page Page Removing a Hard Disk from the Vertical Position Page Installing or Removing a Disk Drive in the Horizontal Position Page Page Connecting a diskette drive ribbon Make sure the cable Connecting a hard disk drive Page Disk Drives Connecting the power cables Page Page connector Page Identifying Your System Error Messages prompt: (Resume = "F1" key) Cache Memory address error Keyboard A-4‘Troubleshooting The Computer Won’t Start The Computer Does Not Respond Ctrl Alt Del Password Problems new Disabling an existing password Disabling the password function Set up Network Server Mode Page Page A-14 Troubleshooting Diskette Problems Page 0 Disk Drive Error: Abort, Ignore, Retry 0 Disk error reading drive d: 0 Disk error writing drive d: Diskette Drive Problems Hard Disk Problems Page Caution A-21 2. Partition the drive, format for MS-DOS A-22 Troubleshooting Software Problems Printer Problems Option Card Problems M o u s e A-26 Memory Module Problems Math Coprocessor Problems Page Physically Formatting a Hard Disk Choosing the Type of Format Page Enter drive number ? (1/2) B-4 Physically Formatting a Hard Disk Option 1, Format For an Epson Enter new skewed sectors in format( 1 - 1 6 ) : Accept recommended skewed sectors per head in format : 0 ? (Y/N) Enter new skewed sectors per head in format (0-16): Modify defective track table ? (Y/N) Modifying the Defective Track Table Enter cylinder number (1 -nnnn): Enter head number (0 -nn): Formatting the Disk you see the Do you want to start formatting ? (Y/N) Format started Cylinder : nnnnn B-9 Option 2, Destructive Surface Analysis Analyze Hard Disk <Drive 1: Read/Save/Write/Read/Restore/Read check for all tracks Current cylinder is nnnn Analysis finished Option 3, Non-destructiveSurface Analysis Read/Verify check for all tracks Exiting the Hard Disk Format Menu Performing System Diagnostics Starting System Diagnostics N o t e Selecting an Option Modifying the Device List Page Terminate checking if an error detected ? (Y/N) an error Repeat times (1-9999) repeats On errors, press any key to stop message(s) ? (Y/N) Page Error Codes and Messages Page Page Page Page CPU and Memory Controllers Interfaces Power Supply Mass Storage Keyboard Physical Characteristics Address Analog monitor Application program ASCII Glossary Automatic speed that computer Backup Base memory 1MB Glossary Command prompt C: Configuration Control code 4 Glossary CPU Glossary Device Device driver Diagnostics DIP switch Directory Diskette Display adapter card DOS Double-density Drive designator MS-DOS Graphics Hard disk Hardware High-density Input/output (I/O) port Interleave factor Kilobyte (KB) Main system board Math coprocessor Megabyte (MB) 256KB, 1MB Memory on card MGA Microprocessor Modem Monitor Monochrome monitor Multi-frequencymonitor Network server Network server mode Noninterlaced mode Numeric keypad modem Parallel Interface Parameter Parity Port Power-ondiagnostics Power-onpassword Processor speed See Operating speed task RGB ROM Root directory 16 Glossary SIMM See Software Subdirectory VGA Write Write-protect Page Page Page Page Page Page Page Page Page EPSON America, Inc EPSON Deutschland GmbH EPSON France S.A EPSON Australia Pty. Ltd EPSON Singapore PTE. LTD