NEC PC-8201 Manuale utente

Per/oncll

Computer

Service

Manual

NEC

Corporation

1983

NEC

Corporation

Tokyo, Japan

without

the

prior written permission

NEC

Corporation.

CONTENTS

CHAPTER 1 IKTRODUCTION

.....................

1.1 Specifications 1

................

1.2 Switches and Contrast VR 1-3

CHAPTER

EXTERNAL VIEW

CHAPTER 3 FUNCTIONAL SPEClFICATIONS

..................

3.1 Logical Specifications 3-1

........................

3.1.1 CPU 3-1

........................

3.1.2 ROM 3-1

........................

3.1.3 Rkil 3-1

....................

3.1.4 LCD Interface 3-3

...................

3.1.5 Printer Interface 3-7

................

3.1.6 Calendar Clock Interface 3-8

..................

3.1.7 Keyboard Interface 3-9

....................

3.1.8 Serial Interface 3-10

...................

3.1.9 Cassette Interface 3-13

................

3.1.10 Bar Code Reader Interface 3-13

..................

3.1.1 1 Interrupt Functions 3-14

.....................

3.1.12 110 Address 3-15

..................

3.2 Physical Specifications 3-21

.....................

3.2.1 Signal Lines 3-21

....................

3.2.2 Power Supply 3-29

...................

3.2.3 Structure and Size 3-30

................

3.3 Interface to Other Hardware 3-30

...................

3.4 Software Interface 3-30

....................

3.5 Human Interface 3-30

..........

3.6 Performance Specification for the PC-8201 3-33

.....................

3.7 Accessories -3-33

CHAPTER 4 DISASSEMBLY/REASSEMBLY

......................

4.1 Disassembly 4-1

....................

4.1.1 PC-8201 Cover 4-1

.....................

4.1.2 LCD Board 4-2

......................

4.1.3 Keyboard 4-2

..................

4.1.4 Power Supply Board 4-2

.....................

4.1.5 Main Board 4-3

4.2 Reassembly

......................

4-3

.....................

4.2.1 LCD Board

4-3

......................

4.2.2 Keyboard 4-4

...................

4.2.3 Keyboardswitch 4-4

..................

4.2.4 Power Supply Board 4-5

.....................

4.2.5 Main Board

4-5

........................

4.2.6 Rob1 4-5

......................

1.3 Installation

4-6

.............

4.3.1 Inserting Cartridge

(RAM.

ROhl) 4-6

.............

.....

4.3.2 Battery Installation 4-7

CHAPTER

OPERATION TEST

...............

5.1 Operatiorls Test Flow Chart

.................

5.2

CPU Peripheral Circuit

..........

5.2.1 PC-820

Power Supply Operation Test

.................

5.2.2 Reset Operation

Test

..............

5.2.3 CPU (80C85) Operation Test

...............

5.2.4 CPU Clock Operation Test

.............

5.2.5 Calendar Clock Operation Test

.................

5.3 110 Peripheral Circuit

.................

5.3.1 LCD Operation Test

...............

5.3.7 SI02 I'ort Operation Test

.............

5.3.3 BCR Interface Operation Test

............

5.3.4 RS-733C Interface Operation Test

.............

5.3.5 SIO

Interface Operation Test

.............

5.3.6 Printer Interface Operation Test

5.3.7 Audio Cassette Interface Operation Test

..........

................

5.3.8 110 Port Operation Test

................

5.3.9 Speaker Operation Test

...............

5.3.10 Keyboard Operation 'Test

CI-IAPTER 6 TROUBLESHOOTING

...............

6.1 Troubleshooting Flowchart

.................

6.2 CPU Peripheral Circuit

............

6.2.1 PC-830

Abnormal Power Supply

...............

6.3.2 PC-8201 Abnormal Reset

............

6.2.3 PC-820

Abnormal CPU (80C85)

6.2.4 Abnornial CPU Clock

.................

...............

6.2.5 Abnorn~alCalendar Clock

.................

6.3

110

Peripheral Circuit

................

6.3.1 Abnormal LCD Display

6.3.2 Abnorrnal S107 Port

.................

6.3.3 Abnormal BCR Interface

...............

6.3.4 Abnormal RS-232C Interface

..............

...............

6.3.5 Abnormal SIO1 Interface

6.3.6 Abnormal Printer Interface

...............

6.3.7 Abnormal Audio Cassette Interface

............

.................

6.3.8 Abnormal I/O Port

6.3.9 Abnormal Speaker

..................

.................

6.3.10 Abnormal Keyboard

-b

APPENDIX

OPERATIONAL hIISTAKES

APPENDIX

IC REMOVAL

................

B-

Necessary Equipment

APX-B-I

.............

R-2

ICs on Printed Circuit Board APX-B-

.................

B-3

ICs

with

Sockets .APX-B-2

.......

Drawings

Insertion and Removal

IC .APX-B-2'

APPENDIX C PARTS LIST

APPENDIX

CIRCUlT

DlAGRAM

APPENDIX

LSI DATA SI-IEET

-iii-I(-iv-

blank)

Specifications

(1) Main Components

a) Keyboard

keys

Function keys:

Cursor lead keys:

Others:

CHAPTER

INTRODUCTION

b) LCD

Effective display area:

Display panel:

Dot size:

Dot pitch:

Display characters:

Reverse:

1.2(W)

50.4(H) mm

240

64 full dot matrix

0.73

0.73 nlm

0.8

rnm

40 (characters)

8 (rows)

By escape sequence

c) Operation Batteries

Batteries:

Operation time:

Four type

A.4

Alkaline-manganese batteries

4.5 days

(At four l~ours/day)

18 days

(At one hour/day)

Note:

With

110

disconnected

Battery cassette: 70(W)

80.5(D)

19(H)mm

Power OFF: Man~~alpower off

(It

possible to command in

BASIC.)

(Variable minutes

one to twenty-five min-

utes)

Low voltage display: Light a LED

(Operate for more than twenty minutes after

lighting the LED.)

Memary Protection Battery (On main P.C.B)

Battery: Rechargeable battery

Protection time: About 26 days

(

GI<

bytes)

About 7 days (14K bytes)

Recharge method: Trickle charge by AC adapter or operation

batteries

e) LSIs

CPU:

CLOCK:

Dimensions:

(2)

110 interface

a) RS-232C

Itfordlength:

Parity:

Stop bit length:

Baud rate:

b) S102

Distance of transfer:

Word length:

Baud rate:

Parity:

Stop bit:

c) SIO1

Distance of transfer:

Word length:

Baud rate:

Parity:

Stop bit:

d) CMT

Distance of transfer:

Baud rate:

File format:

Output level:

e) Printer:

80C85

Code and pin compatible with3085

Standard 32K bytes

Option 32K bytes (connect a 1C socket)

Standard 16K bytes

Option 16K bytes (connect a IC socket)

Option 32K bytes (connect a IC socket)

Option 32K bytes (connect a RAM cartridge)

2.4

MHz

Front;

300!W)

215(D)

35(11) mm

Back:

300(W)

215(D)

l(1.I) mm

6.7 or

bits

Non, EVEN or ODD

bit

75, 110, 300. 600, 1200, 2400, 4800. 9600.

19200 BPS

mMin.

8 bit

19200

Non

or 2 bit

mMin.

8 bits

19200

Non

or 2 bit

1.5 mhlin.

1200 or 600 (switchable by software control)

Compatible with N-BASIC

(binary file only)

hlIC level

Confornls to Centronics Standards.

BCR

g) Systeni slot:

(3)

Special functions:

For connecting a lZAlCI cartrTdge.

A~~tornaticpower OFF

When 1.here is no program operation (awaiting

command) for ten minutes, the power is

automatically switched off.

1.2

Switches and Contrast

(1)

POWER Switch

Move this switch towards the rear to turn the power ON. To conserve the

batteries, the PC-8201 automatically turns the power off if you do not use it for

10 minutes.

When an automatic power-off occurs, the switch will still be in the ON position even

though the power is OFF.

To turn the power ON. move the switch to the OFF position, then back ON.

(3)

BACK UP I'OLb'EII Switch

This switch is for preventing discharge of the Ni-Cd battery for

RAhl

back-up.

The I'C-8301A

will

not operate regardless of the setting of the power switch unless

this switch

ON. Set this switch to OFF position if the PC-8201 is not to be

used

for

long timc.

Nole that the RAkl will not be backed up when this switch is set to llle OFF

position.

(3)

RESET Switch

If the PC-8201 "locks-up" (the display will "freeze" and all keys seem to be

inoperative), press this button to return to the hlain Menu (start-up) screen. It's

highly unlikely that the PC-8201

will

lock-up when you are using the built-in

Application Programs.

However, this situation may occur with customized programs.

(4)

PROTECT Switch

This switch is for protecting the contents of 2nd

RAM.

(BANK #2)

(5)

DISPLAY ADJUSTMENT

DIAL

This control

for adjusting the contrast of the LCD display relative to the viewing

angle.

1-3/(1-4 blank)

CHAPTER

EXTERNAL VIEW

Contrast

mntrol

Power

mLtch

Front

Back

Left Side

/(2-2

blank)

Rear View

CHAPTER

FUNCTIONAL SPECIFICATIONS

3.1

Logical Specifications

3.1.1

CPU

(1)

Available CPU

A 80C85 is used at

2.4

MHz.

(2)

How to Reset

There are two kinds of reset: power on reset and mani~alreset. Pushing the reset

switch initiates

warm-start: pushing it while pushing

shift-key and a control-key.

initiates a cold-start.

3.1.2

ROM

(1)

Available ROX1

Available KOXI is ChlOS ROM, and the capacity is 37,K byte.

(#0)

(2)

User ROM

user ROM is 32K byte. The user Rob1 area is equipped with an IC socket which

can be equipped with CbIOS Kohl. (#I)

3.1.3

RAM

(

1) Available RAM

Thc eight 2li-byte CMOS 1Cs arc used as

RAM.

The system comes with l6K bytes

(STDRAM

(2)

Optional RAhl

The

PC-8201 is equipped with

sockets for twenty-four 3K-byte CMOS ICs.

48K bytes. The first

16K

bytes of this area are combined with the standard

16K byte

RAM

to make a 32K byte

RAhI

area. The remaining 32K bytes, become

RAhl

#2.

There is also a 32K-byte

RAM

cassette ($3) port for external

memory. It call be connected with a system bus oulput in PC.

-M

q;lRAM

CASSETTE

Wr~te

protect

0000 5witrh

lo~:ionl loptlonl loptfion)

Memory Configuration

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