Installation/support tips, Installing diskette drives, Installing hard disk drives – Epson 486 UC+ User Manual

Page 9: Overheating problems, Software problems, Installing option cards, Com port assignment, Booting sequence, Information reference list, Related documentation

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

Make 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

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.

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

Although 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.
Make sure the power requirements of the option cards

you install do not exceed the power supply limitations.
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.

If 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

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.