CASIO IT2000 - Service Manual Immediate Download

HANDY TERMINAL

IT-2000

(PX-704)

JAN 1998

SERVICE MANUAL

(without price)

INDEX

CONTENTS

1. SPECIFICATIONS ................................................................................................ 1

1.1 CPU ............................................................................................................. 1

1.2 Hardware ..................................................................................................... 1

1.3 Memory ....................................................................................................... 1

1.4 Touch Panel ................................................................................................ 1

1.5 Display ........................................................................................................ 1

1.6 Sound .......................................................................................................... 1

1.7 Key .............................................................................................................. 1

1.8 Interface ...................................................................................................... 1

1.9 PC card ....................................................................................................... 2

1.10 Power supply .............................................................................................. 2

1.11 Durability .................................................................................................... 2

2. OPTIONS .............................................................................................................. 3

3. INTERFACE PIN ASSIGNMENT .......................................................................... 5

3.1 8 Pin serial I/F ............................................................................................. 5

3.2 14 Pin serial I/F (RS-232C) ......................................................................... 5

3.3 Card I/F ........................................................................................................ 6

4. SYSTEM DIAGRAM ............................................................................................. 8

4.1 System diagram ......................................................................................... 8

4.2 Block diagram ............................................................................................ 9

4.3 PCB diagram ............................................................................................ 10

4.4 Power supply diagram ............................................................................. 11

5. CIRCUIT DESCRIPTION .................................................................................... 12

5.1 Memory ..................................................................................................... 12

5.2 KBC ........................................................................................................... 15

5.3 Communication ........................................................................................ 21

5.4 PC Card ..................................................................................................... 22

5.5 Power Supply ........................................................................................... 24

6. DISASSEMBLY .................................................................................................. 26

6.1 Removal of the main battery and the backup batteries ....................... 26

6.2 Removal of the battery pack cover ........................................................ 26

6.3 Removal of the Lower case block .......................................................... 26

6.4 Removal of SUB ass'y PCB .................................................................... 27

6.5 Disassembly of the Middle Case Block ................................................. 27

6.6 Disassembly of Upper Case Block ......................................................... 29

7. DIAGNOSTIC PROGRAM .................................................................................. 30

7.1 General ...................................................................................................... 30

7.2 Inspection Detail ...................................................................................... 32

7.3 Special tool ............................................................................................... 33

7.4 Diagnostic test ......................................................................................... 35

8. CIRCUIT DIAGRAMS ......................................................................................... 53

8.1 Curcuit diagram INDEX ........................................................................... 53

9. EXPLODED VIEW .............................................................................................. 75

10. PARTS LIST ........................................................................................................ 76

-- 1 --

1. SPECIFICATIONS

1.1 CPU

CPU: Intel 80486 GX (32 bit)

Clock: 25M Hz

1.2 Hardware

Configuration: IBM PC AT Architecture and dedicated hardware

1.3 Memory

Main memory:

4MB

16Mbit DRAM

× 2

File memory:

0MB

(for D10 Model)

4MB

32Mbit NAND Flash

× 1 (for D20 Model)

8MB

32Mbit NAND Flash

× 2 (for W30, D30P Model)

DOS & BIOS Memory:

1MB

8Mbit Flash E2PROM

× 1

MASK ROM:

8MB

64Mbit MASK ROM

× 1 (W30 Model only)

Video Memory:

512KB

4Mbit DRAM

× 1

HW Window Memory:

32KB

256Kbit SRAM

× 1

1.4 Touch Panel

Type:

Analog Type

Resolution:

192

× 384 dots

1.5 Display

LCD Type:

FSTN semi-transparent LCD

Resolution:

192

× 384 dots

Back light:

EL back light (with auto-off function)

Character type:

Alpha-numeric (ANK), user defined characters

Character size:

Normal size

12 dots: 6

× 12 dots

(Alpha-numeric)

16 dots: 8

× 16 dots

24 dots: 12

× 24 dots

Double size

12 dots: 12

× 12 dots

(Kanji)

16 dots: 16

× 16 dots

24 dots: 24

× 24 dots

Contrast:

VGA mode

4 gradation (Internal control 16 gradation)

HW Window

2 gradation

1.6 Sound

Sound source:

Buzzer

Volume:

4 steps (Max/Mid/Min/Off)

1.7 Key

Numeral keys:

11 (Including decimal point)

Function keys:

4 ("", "Fn", "CLR", "Return")

1.8 Interface

[COM1]:

8 pin serial I/F

Purpose:

for connections of BCR, PC

Baud rate:

300 ~ 115,200 bps

Transfer type:

Start-stop synchronous transmission

I/F level:

SD(1)

less than 5.0 V

SD(0)

more than +5.0 V

RD(1)

less than +0.6 V

RD(0)

more than +2.4 V

-- 2 --

[COM2]:

14 pin serial I/F (RS-232C)

Purpose:

for dedicated peripheral devices only

Baud rate:

300 ~ 115,200 bps

Transfer type:

Start-stop synchronous transmission

I/F level:

SD(1)

less than 5.0 V

SD(0)

more than +5.0 V

RD(1)

less than +0.6 V

RD(0)

more than +2.4 V

Infrared (conforms to IrDA Ver. 1.0)

Purpose:

for data transfer to I/O box

Baud rate:

2,400 ~ 115,200 bps

Transfer type:

Start-stop synchronous transmission

Transfer distance: 60 cm

Infrared (conforms to IrDA Ver. 1.1)

Purpose:

for data transfer to I/O box

Baud rate:

0.576/1.152/4M bps

Transfer type:

Flame synchronous transmission

Transfer distance: 60 cm

1.9 PC card

Conforms to PCMCIA 2.1 standard

Supply voltage: 3.3 V/5 V

1.10 Power supply

Main Battery

Type:

Lithium ion battery pack NP-500

Operating duration: 8 hours (Calculate: Display = 1:10, 20

°C, Back light = off)

Sub batteries

Type:

Primary: Coin type lithium ion battery CR2032

Secondary: Rechargeable battery IVR2430

Backup duration:

2 weeks

1.11 Durability

File memory (NAND Flash):Erasing 500,000 times

Touch panel:

100,000 characters

Back light:

2,500 hours (Half life period)

-- 3 --

2. OPTIONS

I/O BOX

· IT-2060IO-E (Satellite I/O BOX)

· IT-2065IO-E (Master I/O BOX)

Battery pack

· DT-9023LI (Lithium ion battery pack)

Charger

· DT-9021CHG-E (for Lithum ion battery)

Cable

· DT-881RSC (MODEM cable between IT-2060/2065IO-

E/9-pin female and PC/25-pin male)

· DT-822RSC (Cross cable between IT-2060IO-E and

PC/25-pin male)

· DT-883RSC (Cross cable between IT-2060IO-E and

PC/25-pin female)

· DT-887AX (Cross cable between IT-2060IO-E and PC/

9-pin female)

· DT-888RSC (Modular cable between IT-2060/2065IO-E

and IT-2060/2065IO-E, 6-pin and 6-pin)

· DT-9689AX (RS-232C 9-pin cable between IT-2000 and

PC)

· SB-751HF (SCSI cable between IT-2065IO-E and PC

:Centro 50-pin full male)

· SB-752HH (SCSI cable between IT-2065IO-E and PC

:Centro 50-pin half male)

· SB-753HP (SCSI cable between IT-2065IO-E and PC

:Pin type half 50-pin male)