Epson Equity LT Troubleshooting Guide download pdf

EQUITY LT

Switch Settings

Computer Specifications

The CPU SPEED switch selects between 4.77 MHz and 10

MHz. When the computer is running at 4.77 MHz, the power

light is orange, and at 10 MHz, the light is green.

CPU:

NEC V30 dual-speed

m1croprocess0r.

4.77 or 10 MHz

Switch

selectable

clock

speeds.

20-b,,

address bus and

16.blf data bus

640KB on

man

system board

16KB.

two sockets

RAM:

ROM:

Floppy Disk

Controller:

The CPU SPEED switch is located above the keyboard.

Supports

two

tnfernal

(720KB)

dwes

and one external 5 25”

(360KB)

drive

Two

expansron

slots

(proprietary)

Internal. programmable

64 Bytes

CMOS RAM

lor

real-llme

clock. calendar, and system

cont,gurat,on

w,th

battery backup

P,op,,e,ary,

full-functmn.

keys,

separate

numer~clcursor

pad

N,Cad rechargeable battery and

siandard 1101220 AC adaptor

Expansion Slots:

Speaker:

Clock/Calendar

RAM:

Num

Lock

Keyboard:

Power:

Video Controller

and Screen:

Superlwf

or super,wsl

backlit

LCD,

external CGA

momtor

port

opflonal

Mass storage:

Standard:

Two. 3.5 half-height floppy

disk

dwes. 720KB storage

capacity

35-

half-helgh,

floppy

disk

dwe

and

20MB hard

disk

drive

Centronlcs’-compatible parallel port

RS-232C

compattble

serial

port

5 25 floppy

disk

dwe

port

Exlernal

CGA

port

LCD DIP Switch Settings

Standard:

Switches

Functions

Interfaces:

Standard:

1 2 3 4

OFF

ON ON

ON OFF

OFF ON

OFF OFF

OFF

Environmental

Conditions:

Temperature

LCD Normal

LCD Reverse

LCD Screen Mode 0

LCD Screen Mode 1

LCD Screen Mode 2

LCD Screen Mode 3

Select LCD

Select RGB color monitor

Operating

Range

41~

90°F

(50

35%)

Storage Range

-4O

12Z°F

(-20”

6OOC)

Operating Range 20%

60%

non-condensing

storage Range 10%

90%

non-condensmg

Humidity:

Physical

Dimensions: Wldlh

-13 6

I”

Depth -12 2

I”

Height-

I”

Waghi-

12 6 Ibs

(Dual floppy

disk

drive

conhguratlon)

Display Options: Supertwist

Backlit LCD

Screen Type:

Rellectlve Transmlsslve

LCD Color:

YdOW

Blue

Size (Active Area):

95’

x 41

Aspect Ratio:

14to1 14101

Graphrcs

Resolution: 640

200 640

200

80 x 25

Character

Drsplav:

S&&able

View

Anglellnverse

Video:

Y=?S

Yes

Adjustable

Brightness:

Power Saver

Feature:

Yes

Equity LT Options:

Internal 30011200 baud modem

13 CGAcolordlsplay(640 x

200dots)

carrying case

Cigarette

lighter

adaptor

Screen

d,splays

Supertwsl LCD

dnsplay

Supertwsl

Backltt

LCD

display

Equity Series Computers

EQLT - 1

12/12/88

1 2 3 4 5

Summary of Contents

Page 1 - Computer Specifications

EQUITY LTSwitch SettingsComputer SpecificationsIThe CPU SPEED switch selects between 4.77 MHz and 10MHz. When the computer is running at 4.77 MHz, the

Page 2 - Connector Pin Assignments

EQUITY LTBack Panel DIP Switch SettingsSwitchesFunctions12 3 43NUse external diskette drive3FFUse parallel printerONExternal diskette drive is BOFFExt

Page 3

EQUITY LTI/O Port AddressesAddressFunction000-OlFDMA Controller020 - 03FInterrupt Controller040 -05FTimer / Counter080 - 07FProgrammable Peripheral In

Page 4 - Software Problems

EQUITY LTlnstallation/Support TipsPower---The Equity LT AC adapter is an auto -sensing unitwhich adjusts automatically between 100-240 V,50/60 Hz. The

Page 5 - Information Reference List

EQUITY LTInformation Reference ListEngineering Change NoticesEQLT-001EQLT-002EQLT-00312/8/872/10/89Change of Cable Set Y6DE (PDD Signal Cable)Hilo-HD

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Summary of Contents

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