Zenith SM-Z-89 Bedienungsanleitung

SM-Z-B9/90

Computer

System

Service

Manual

2.I'N

data

systems

ZENITH DATA SYSTEMS

SAINT JOSEPH, MICHIGAN 49085

585-7

Zenith Data Systems

Printed in the United States of America

The

Z-89/90 Computer

System

This

Z-89/90 ComputerSystem Service

Manual

contains

service

information

for

the

following six

Zenith

Data Systems products:

The

Z-89/90 Computers.

The

Z-89-37 Double-Density Disk Controller.

The

H-88-1 Single-Density Disk Controller.

The

H-17-1

Floppy

Disk Drive.

The

H-17-4

Floppy

Disk Drive.

The

WH-88-16

Memory

Expansion.

Z-89/90

Computers

Service

Manual

ZENITH

DATA

SYSTEMS

SAINT

JOSEPH,

MICHIGAN

49085

I I

585-7

Zenith Data Systems

Printed in the United Statee of America

COMPUTER

Table

Contents

SPECIFICATIONS 1-1

CPU Boards Z-89/90 , , 1-2

SETUP AND TESTING

2-1

Power Line Considerations

,.........

2-1

Cabinet Removal ,2-2

ZDS SYSTEM CONFIGURATION , .

3-1

Terminal Logic Circuit Board 3-1

CPU Logic Circuit Board 3-4

Serial Interface 3-20

Memory

Map

3-22

I/O Port Usage 3-22

OPERATION "4-1

Command

Summary

4-1

Keyboard

Operation.

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

4-3

Normal Modes

and

Keys

4-5

CIRCUIT DESCRIPTION 5-1

Power

Supply

Circuit

B~~~d'

:::::::::::::

5-2

Video Deflection Circuit Board 5-3

Video Driver Circuit Board

:::::::::::::

5-6

Terminal Logic Circuit Board 5-6

CPU Logic Circuit Board 5-15

Serial Interface I/O Circuit Board 5-21

Block Diagrams fold-outs

SERVICE ,6-1

CRT

Adjustment

6-2

Switch

Configurations 6-4

CPU Logic Circuit Board 6-6

Rotational

Speed

Test 6-22

Memory Testing

, , 6-23

Troubleshooting Charts 6-25

CIRCUIT BOARD X-RAY VIEWS

7-1

SEMICONDUCTOR IDENTIFICATION CHARTS 8-1

Component

Number

Index

,8-1

Part

Number

Index

8-4

REPLACEMENT PARTS LIST 9-1

Power

Supply

9-1

Video Deflection Circuit Board 9-1

Video

Driver Circuit Board 9-3

Terminal Logic Circuit Board 9-3

CPU Logic Circuit Board 9-4

Chassis Parts 9-5

Serial Interface I/O Circuit

Board.

. . . . . . . .

9-6

SCHEMATIC DIAGRAMS fold-in

COMPUTER

11-1

Specificalions

CPU

AND

MEMORY

Processor .

Clock .

Memory .

DISPLAY

CRT

Display Format .

Display Size .

Character Size .

Character

Type

Keyboard .

Cursor .

Cursor Controls .

Cursor

Addressing

Tab .

Refresh Rate .

Edit

Functions

Erase

Functions

Bell .

Video .

Z-80.

2.048 MHz.

48K bytes

user

RAM

(expandable

64K), Z-89 series

64K bytes

user

RAM, Z-90 series

System

for ROM

and

RAM. 8K reserved.

12" diagonal -green

phosphor.

24 lines of 80 characters (with access

25th line).

6.5"

high

x8.5" wide.

0.2"

high

x0.1"

wide

(approximate).

5 x 7

dot

matrix

(upper

case); 5 x 9

dot

matrix

(lower

case

with

descenders); 8 x 10

dot

matrix

(graphics).

84 keys (60

alphanumeric,

12 function/control)

plus

12-key

numeric/control

pad.

Blinking,

nondestructive,

underline,

block, or dis-

abled

(DIP

switch

selectable).

Up,

down,

left, right,

home,

CR,

LF,

back

space, tab,

and

cursor off.

Relative

and

direct.

Standard

8-column

tab.

60 Hz at 60 HZ/50 Hz at

line

frequency.

Insert

and

delete character or line.

Erase page, erase to

end

of line,

and

erase

end

page.

Audible

alarm

receipt

of ASCII

BEL.

Normal

and

reverse by character.

COMPUTER

SERIAL

INTERFACE

Channels.

'" " .

Output

Levels .

Input

Levels .

Character Length .

Parity .

Stop Bits .

Baud Rates .

GENERAL

Power

Requirements .

Size .

Weight .

Operating

Temperature

Storage

Temperature

EIA

RS-232C.

Each

channel

provides serial

data

and

primary

RS-

232C

handshake.

RS-232C.

RS-232C compatible.

5,6,7,

or 8bits.

Even, odd, stick, or none.

1-1/2 or

All

standard

rates

57,600 baud.

115/230 volts at 90

watts

max.

13"

high

17"

wide

20"

deep

(3:3

x43.2 x50.8 em).

46 lbs. (20.7 kg).

10° to 35° Celsius.

0°

to 50° Celsius.

CPU BOARDS

Z·89/90

The

CPU boards for

the

Z-89 (HE 181-3396)

and

the

Z-90

(HE

181-3615) are basically

the

same,

with

the

following exceptions:

Z-89

Z-90

U516

HE 444-41

HE 444-83

U518

HE 444-62

HE 444-84

U549

443-904

See

note

U557

443-912

See

note

U558

HE 443-754

HE 100-1817

NOTE

The

memory

chip

is left

out

to receive

the

cable from

the

16K Memory

Expansion

Board.

NOTE

U557 is left

open

receive

the

interface cable from

the

Z-89-37 Controller Board.

The

Z-90 CPU boardhas

the

JJ505

jumper

plug

removed. Cable (HE 134-1159) is

connected

from JJ505

14 of P508,

enable

the

4K ROM

U518.

JJ501

must

jumpered

for correct

memory

size (48K or 64K).

Theseboardsmay be

interchanged

the

above modificationsare made.

The

Z-90 CPU

board

may

used

direct

replacement

the

proper

IC's are

inserted

U549, U557,

and

U558. U516

and

U518

not

have

changed.

Zenith

Data Systemsreserves

the

right

discontinue

products

and

change

specifications

any

time

without

incurring

any

obligation

incorporate

new

features

products

previously sold.

COMPUTER,

12-1

Setup

and

l'esting

POWER LINE CONSIDERATIONS

you

need

change

the

position

the

115/230

switch (located

the

bottom of

the

Computer), be

sure

you

change

rear

panel

fuse F1 to

the

proper

value

as follows:

For 115 VAC, use a1.5-ampere, 125-volt, slow-

blow

fuse.

For 230 VAC, use a

I-ampere,

250-volt, slow-

blow

fuse.

The

plug

the

power

cord is for

standard

115 V

outlets. For 230 VAC operation

the

U.S.A.,

cut

off

and

replace

manner

such

that

your

power

connec-

tion conforms

with

section 210-21

(b)

ofthe

National

Electric Code,

which

reads,

part:

"Receptacles

connected

circuits having dif-

ferent voltages, frequencies, or types of

current

(AC

DC)

the

samepremises shall beof

such

design

that

attachment

plugs

used

such

cir-

cuits are

not

interchangeable."

When you install the

new

plug, make sure it is con-

nected according to your local electrical code. Units

with three-wire line cords must

always

have the

green wire connected to chassis ground.

sure

the

NORM/LOW

switch

(on

the

bottom of

the

Computer) is set

its

proper

position

match

your

line

voltage as follows:

NORM range -110 Vto 130 V

rms

or 220 Vto

260 Vrms.

LOWrange-100

Vto

120

Vrms

or 200

Vto

240

Vrms.

NOTE:

you

not

know

the

value

ofthe

line

voltage

your

area, set

the

NORM/LOW

switch

to NORM.

2-2IL-

------COMPUTER

CABINET REMOVAL

Whenever you

need

remove

the

cabinet

top:

•Refer to

the

inset

drawing

Figure

2-1,

insert

the

blade

of a

small

screwdriver

into

the

notch

the

latch plate,

and

then,

you

lift

upward

the

front,

slide

the

latch

plate

toward

the

front

ofthe

Computer

about

1/4".

•Likewise,

open

the

latch

plate

the

other

side of

the

cabinet

top.

•

WARNING:

When

the

line

cord

con-

nected

AC outlet,

hazardous

voltages

can

present

inside

your

Computer. See

Figure 2-1.

•Carefully

tilt

the

cabinet top back.

•

Unplug

the

fan.

•

When

the

top

is tilted straight

up,

carefully

lift

the

hinges

out

the

rear

panel.

Simply

reverse

this

procedure

to close

and

lock

the

cabinet top back

the

Computer.

WARNING:

Boxed-In

areas

show

hazardous

voltage

locations.

BACK

Figure 2-1

COMPUTER_-----------------------13-1

ZDS System Configuration

This

section of

the

Manual

shows

you

the

normal

switch

and

jumper

positions. Check

them

sure

they are

their

proper

positions, or set

them

(as

explained) for

the

operation

that

is desired.

The

Computer

communicates

with

the

peripherals

RS-232C signal levels. 25-pin

"D"

connectors

the

rear

panel

conform

RS-232C

standards

and

mate

with most

equipment

that

conforms

this

standard.

Refer

the

following sections

that

pertain

your

Computer.

TERMINAL LOGIC CIRCUIT

BOARD

Carefully tilt

back

the

cabinet

top. See

Figure

2-1.

sure

the

POWER

switch

is off.

Then

remove

the

screws

that

hold

the

terminal

logic

circuit

board

(the

rear circuit board). Remove

the

two

screws

that

hold

the

top of

the

CPU logic

circuit

board.

Disconnect

the

cables, as necessary,

and

lift

the

circuit

boards

out

the

Computer.

SWITCH S402 (Secondary power-up configura-

tion)

Push

all of

the

switches

S402

(0)

shown

Figure 3-1

Page 3-2.

you ever

want

change

these

switch

positions,

they are

defined

as follows:

SWITCH

SECTION DESCRIPTION

0o=

underscore

cursor; 1=block

cursor

1o=key click; 1=

key click

2o=

discard

past

end

of line; 1=

wrap

around

3o=

auto

CR;

auto

4o=

auto

LF;

auto

5o=ZDS mode; 1=ANSI

mode

6o=

keypad

normal; 1=

keypad

shifted

7o=60 Hz refresh; 1=50 Hz refresh

11.-

COMPUT;£R

SWITCH S401 (Primary

power-up

configura-

tion)

Refer to

Figure

3-1

for

the

following steps.

This

switch

(located

the

terminal

logic circuit

board) sets

the

following

power-up

and

reset modes:

SWITCH

SECTION DESCRIPTION

0-3 Baud Rate

4Parity Enable

Odd/Even

Parity

6Normal/Stick Parity

7Half/Full

Duplex

The

particular

configuration

that

you

select is ini-

tialized

when

you

power-up

the

Computer

when

you

perform a

Computer

Reset.

Figure

3-1

shows

the

location of

switch

S401.

Remember

that, as

you

look

switch

S401 from

the

front of

the

Computer,

you

select

the

one

(1)

positions

the

switch

pushing

the

switches

down,

and

you select

the

zero

(0)

posi-

tions

pushing

the

switches

up.

Set

switch

S401 for:

MODE SWITCH SECTION

0 1 234567

9600 Baud 001 1

No Parity 0

Odd

Parity 0

Normal Parity 0

Full

Duplex

L--_

When

parity

is selected,

you

can

set

the

even

and

normal

parity

switch

sections to

either

position

since

they

will be ignored.

Each

function

switch

S401 is

explained

the

fol-

lowing

text.

"",

r®l

==[JI==@==T

Figure

3·1

o5402

~n~~e~~~~~

34_.?

.6_

(ON).

.';

<---------.',

........

";"

..;

;',

; ,

:,'"

•

•.

•.•

- _

...

._.

. .

.-l

•....•..

,_.

•...

•..•.

_-_.

5401

o '

.•

aa~~~8B~

~!u:/_:

234567

.-----

---

-.-

(ON)-

-------

•

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