Epson EL 486UC+

Installation/Support Tips

Installing Diskette Drives

Make sure that the drive type has been correctly selected in the SETUP program.

Installing Hard Disk Drives

When installing a hard disk drive, see the hard disk drive type tables and use the auto-sensing feature in SETUP to select the correct type number for the drive. If the auto-sensing feature does not produce a match for the drive, you can define your own drive type by selecting User as the type and entering the drive’s exact parameters.

If you plan to install two hard disk drives in the internal bays, you must use flat-head screws (#6-32UNC x 8 FH,M,+) to secure the top drive to the mounting bracket. (On a system with three or more option cards, the installation of a second hard disk drive may overload the power supply.)

If you are installing an ESDI hard disk drive, make sure you disable the built-in IDE hard disk drive interface by moving jumper J23 to position 2-3. Also be sure to remove the hard disk drive ribbon connector from the system board.

Overheating Problems

0Make sure that the DX or DX2 processor has an adequate heat sink and fan installed to prevent overheating. The Epson CPU upgrade kit comes with a heat sink and a fan. Other manufacturer’s kits may not include these items.

Software Problems

D When installing a copy-protected software package, first try the installation at fast speed. If this does not work properly, select slow speed by pressing Ctrl Alt and the - key on the numeric keypad. Try loading the program at slow speed and then switching to fast speed, if possible.

Cl When using a software package that uses a key disk as its copy-protection method, try loading it at fast speed. If this does not work, load it at slow speed.

Installing Option Cards

PAlthough the EL 486UC+ will support most full-length option cards, option cards with an I/F connector on the back may not fit into the option slot.

DMake sure the power requirements of the option cards you install do not exceed the power supply limitations.

Cl If the computer locks up, the power supply may be overloaded. On a system with three or more option cards, the installation of a second hard disk drive may overload the power supply.

0If you are installing a video adapter card that doesn’t support VGA, make sure you disable the built-in VGA by setting jumper J18 to the Off position.

COM Port Assignment

If you want to assign COM1 as COM3, you must set jumper J5 to position 2-3. If you want to assign COM2 as COM4, you must set jumper J6 to position 2-3.

Booting Sequence

If you cannot boot the computer from the hard disk, make sure the booting sequence in is set to A: then C:.

Then boot the computer from a system diskette in Drive A.

Information Reference List

Engineering Change Notices

None.

Technical Information Bulletins

None.

Product Support Bulletins

None.

Related Documentation

TM-EL486UCEpson EL 486UC Service Manual

EL486UC+ADD Epson EL 486UC+ Service Manual Addendum

PL-EL486UC+ Epson EL 486UC+ Parts Price List

400275200 Epson EL 486UC+ User’s Guide

12/1/93

Epson EL 486UC+ - 9