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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
I module
ACC 2036 (U12)
System controller; provides AT bus control logic.
(U27, U28, U35)
ACC 2020 (U29)
Power management controller
AM27C010 (U30)
1024 Kb (128 Kb x 8) (OT) EPROM; VGA BIOS
ROM and Initialization BIOS ROM used during
power up; Databook Socket Services; supports
shadow RAM
Buzzer (BZ1)
Internal
System Board Connectors
Connector
Keyboard or mouse (J1)
Cover switch (J2)
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)
IDE HDD (J8)
External CRT VGA (J11)
CCFT inverter, LCD backlight,
brightness/contrast (J12)
LCD panel (J13)
LED (J14)
Trackball (J15)
Power supply, DC-DC converter (J16) 22-pin connector, female; supplies
ActionNote 4000-4
68-pin header, male
44-pin header, female
9-pin, D-shell, male (back panel)
Ribbon terminators, 8-pin and 16-pin,
respectively
50-pin edge connector; female,
supports HDD
15-pin female, back panel
12-pin header, male
I
B-pin header, male
10-pin header, male
4-pin header, male
power from the power supply to the
main system board
External Connector Pin Assignments
Parallel Port Connector (J3)
pin 13
Parallel Port Connector Pin Assignments
Signal
Signal
Pin
(Parallel)
(FDD)
1
/STROB
Not connected
(Strobe)
2
I Data 0
3
I Data 1
12 1 Paper end
13 1 SLCT
I Write enable
Serial Port Connector (J6)
Serial Port Connector Pin Assignments
Keyboard/Mouse Connector CJ1)
Keyboard/Mouse Connector Pin Assignments
Pin
Signal
1
Mouse data
2
Keyboard data
3
Ground
7/27/93
pin 1
pin 14
Signal
Pin (Parallel)
14
/AUTOFD
15
/ERROR
16 1 /INlT
I
pin 5
pin 6
pin 4
pin 3
pin 1
pin 2
Pin
Signal
4
+5 VCC
5
Clock, mouse
6
Clock, keyboard
Signal
(FDD)
Reduce write
current
I
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