Epson ActionNote 4000 Anleitung zur Fehlerbehebung PDF herunterladen (Seite 4)

EPSON ActionNote 4000

System Board Components

Component

Description

CPU (U1)

486SLC/33 microprocessor:

1KB internal, two-way

set associative cache

BTC-5001 (U2)

BTC keyboard encoder&coder (70C40/77C82)

80C42/8742 (U4)

integrated, 8042 compatible, keyboard controller

DS 1287 or compatible

Dallas DS 1287 or compatible RTC; includes

RTC (U5)

Lithium backup battery and RAM

TH6460 (U7)

Peripheral controller; provides one printer parallel

port, two 16450 UARTS, IDE HDD interface, FDC,

bus interface buffers

DRAM (U13, U14,

4MB standard memory, 2MB soldered on main

U8, U9)

system board and one 2MB memory module;

expandable to 8MB by replacing the 2MB memory

module with a 8MB memory module (J5)

DB86082 (U10)

DataBook PCMCIA controller and driver interface

ACC 2036 (U12)

I module

System controller; provides AT bus control

logic.

(U27, U28, U35)

ACC 2020 (U29)

AM27C010 (U30)

Power management controller

1024 Kb (128 Kb x 8) (OT) EPROM; VGA BIOS

ROM and Initialization BIOS ROM used during

power up; Databook Socket Services; supports

Buzzer (BZ1)

shadow

RAM

Internal

System Board Connectors

Connector

Keyboard or mouse (J1)

I

Description

1

6-pin, mini-DIN, female (back panel)

Cover switch (J2)

]

P-pin header, mate

Parallel port, printer/external FDD (J3)

1

25-pin, D-shell, female (back panel)

PCMCIA (J4)

Memory module (J5)

Serial port, COM1 (J6)

Keyboard ribbon cables (J7, J9)

68-pin header, male

44-pin header, female

9-pin, D-shell, male (back panel)

Ribbon terminators, 8-pin and 16-pin,

IDE HDD (J8)

respectively

50-pin edge connector; female,

External CRT VGA (J11)

CCFT inverter, LCD backlight,

supports HDD

15-pin female, back panel

12-pin header, male

brightness/contrast (J12)

I

I

LCD panel (J13)

B-pin header, male

LED (J14)

10-pin header, male

Trackball (J15)

4-pin header, male

Power supply, DC-DC converter (J16) 22-pin connector, female; supplies

power from the power supply to the

main system board

External Connector Pin Assignments

Parallel Port Connector (J3)

pin 13

pin 1

pin 14

Parallel Port Connector Pin Assignments

Pin

F

1

Signal

(Parallel)

/STROB

(Strobe)

Signal Signal

(FDD)

Pin (Parallel)

Not connected 14 /AUTOFD

Signal

(FDD)

Reduce write

current

1

2

I Data 0

1

Index

15

/ERROR

1

Head select

3 I Data 1

1

Read data

16

1

/INlT

I

Direction

12

1

Paper end

13

1

SLCT

1

Write data

125

1

Ground

I

Ground

I Write enable

I

I

Serial Port Connector (J6)

Serial Port Connector Pin Assignments

Keyboard/Mouse Connector CJ1)

pin 6

pin 5

pin 4

pin 3

pin 2

pin 1

Keyboard/Mouse Connector Pin Assignments

Pin Signal Pin Signal

1

Mouse data 4 +5 VCC

2

Keyboard data

5

Clock, mouse

3

Ground

6

Clock, keyboard

ActionNote 4000-4

7/27/93

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