Heath Company Heathkit H8 Manual de usuario

Heathkit® Manual

for the

DIGITAL COMPUTER

Model H8

ASSEMBLY 595-2013-01

: --

--

HEATH

COMPANY

BENTON

HARBOR,

MICHIGAN

49022

Copyright

Heath Company

Printed

in

the United States of America

Page

2

TABLE OF CONTENTS

UNPACKING

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

3 CONTROL CIRCUIT BOARD

Parts

List.

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

..

34

Step-by-Step Assemlbly

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

37

ASSEMBLY NOTES . . . . . . . . . . . . . . . . . . . . . . . .

..

4 Circuit Board Installation

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

"

55

Circuit Board Checks

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

56

CHASSIS ASSEMBLY

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

..

7

Step-by-Step Assembly

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

9

CPU CIRCUIT BOARD

Replacement Parts List

.....

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

..

59

Circuit Board Installation

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

61

Mother Circuit Board Assembly

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

9 Circuit Board Check

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

61

Chassis

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

14

Power

Supply

Tests.

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

..

30 FINAL ASSEMBLY

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

62

UNPACKING

Your Digital

Computer

shipping

carton

contains

a

box

marked

"CPU

Circuit

Board"

and

a

smaller

box

marked

"Pack

#2."

After

you

remove

these

two

boxes,

the

remaining

parts

in

the

shipping

carton

form

the

Main

Pack,

which

are

items

too

large

to

fit

into

the

other

parts

packs

and

those

items

which

you

will

use

in

the

chassis

assembly

section.

Set

aside

the

boxes

marked

"CPU

Circuit

Board"

and

"Pack

#2"

until

one

of

these

packs

is

called

for

in

an

assembly

section. DO NOT

disturb

either

of

these

packs

yet.

Page 3

Each

assembly

section

of

this

Manual

contains

its

own

"Parts

List"

and

"Step-by-Step

Assembly"

in-

structions.

At

the

beginning

of

each

Parts

List,

you

will

be

instructed

which

parts

pack

to

locate

and

unpack.

You

may

also

be

directed

to locate

certain

required

parts

from

the

Main

Pack.

To

avoid

intermixing

parts,

do

not

remove

or

open

any

of

the

parts

packs

until

you

are

directed

to

do

so

at

the

beginning

of

one

of

the

"Parts

Lists."

Return

any

part

that

is

packed

in

an

individual

envelope,

with

the

part

number

on

it,

back

in

its

envelope

after

you

identify

it

until

that

part

is

called

for

in

a step.

Some

envelopes

have

one

transparent

side

so

you

can

iden-

tify

the

parts

inside

without

opening

the

envelope.

Page 4

ASSEMBLY NOTES

TOOLS

You

will

need these tools to assemble

your

kit.

~~

~-A(

d!

//

~

tf'J

rJ

tlJI

~

.....

I LONG-NOSE I

WI

RE

\ I

PLIERS STRI

PPERS

1/8"

&1/4"

-

BLA

DE

PLIERS DIAGONAL SCREWDRIVERS

CUTTERS

-------------------------------------------------

OTHER

HELPFU~

TOOLS

~

/ DESOLDERING

BULB*

NUT

STARTER

IIMAY

BE

SUPPLIED DESOLDERING

BRAID*

I WITH

KITI

I

HEATHKIT

SOLDERING

I

RON

OR

,25

TO

40

WATTSI

I

*TO

REMOVE

SOLDER

FROM

CIRCUIT

CONNECTIONS

I

________________________________________________

~

ASSEMBLY

1.

2.

Follow

the

instructions

carefully

and

read

the

entire step before you perform

the

operation.

The

illustrations in

the

Manual are called

Pictorials

and

Details. Pictorials

show

the

over-

all operation for a

group

of assembly steps;

Details generally illustrate a single step.

When

you are directed

to

refer to a certain Pictorial

"for

the

following

steps,"

continue

using

that

Pictorial

until

you are referred

to

another

Picto-

rial for

another

group of steps.

3.

4.

5.

Most kits use a separate

"Illustration

Booklet"

that contains illustrations (Pictorials, Details,

etc.) thataretoo largefor

the

AssemblyManual.

Keep

the

"Illustration

Booklet"

with

the

As-

sembly Manual.

The

illustrations

in

it are ar-

ranged

in Pictorial

number

sequence.

Position all parts as

shown

in

the

Pictorials.

Solder

a part or a

group

of parts only

when

you

are instructed to

do

so.

6.

= =

~

Each circuitpart

in

an

electronickit hasits

own

component number

(R2,

C4, etc.). Use these

numbers

when

you

want

to

identify

the

same

part

in

the

various sections of

the

Manual.

Thesenumbers,

which

areespeciallyuseful ifa

part has to be replaced, appear:

In

the

Parts List,

At

the

beginning of each step where a

component is installed,

In some illustrations,

In

the

Schematic,

In the section

at

the

rear

Df

the

Manual.

7. When you are instructed to

cut

something to a

particular length,

use

the

scales (rulers) pro-

vided at

the

bottom of

the

Manual pages.

SAFETY WARNING: Avoid eye

injury

when you

cut

offexcess lead lengths. Hold

the

leads

so

they

cannot

fly

toward

your

eyes.

Page 5

SOLDERING

Soldering is one ofthemost importantoperationsyou

will perform while assembling your kit. A good sol-

der connection will form

an

electrical connectionbe-

tween

two

parts, such as a component lead

and

a

circuitboard foil. A bad solder connectioncould pre-

vent

an

otherwise well-assembled kit from operating

properly.

It

is easy to make a good solder connection if you

follow a few simple rules:

1.

2.

Use

the

right type of soldering iron. A 25 to

40-watt pencil soldering iron

with

a 1/8" or

3/16"

chisel or pyramid tip works best.

Keep

the

soldering irontip clean. Wipe it often

on a wet sponge or cloth;

then

apply solder

to

the

tip

to

give

the

entire

tip

a wet look. This

process is calledtinning.

and

it will protect

the

tip

and

enable you

to

make good connections.

Whensolder

tends

to

"ball"

or does not stick

to

the

tip. the tip needs

to

be

cleaned

and

retin-

ned.

Page 6

PARTS

Resistors will

be

called

out

by

their

resistance

value

in

0 (ohms). kO (kilohms),

orMO

(megohms). Certain

types of resistors will have

the

value

printed

on

the

body, while others will be identified by a color code.

The

colors of

the

bands

and

the

value

will

be

given in

the

steps, therefore

the

following color

code

is given

for information only.

==

l/4-WATT

==fDIII~==

l/2-WATT

l-WATT

EXAMPLES:

==

..

~==

/

BROWN

__

GREEN

---

ORANGE

~

SILVER

5

1.000

±10%

15 x 1,000 =

15,0000

(15,000 OHMS),

or

"15 kO"

/ ORANGE 3

__

BLACK 0

---

GREEN

100,000

"'"

GOLD

::+:5%

30 x 100,000 = 3,000,000 0

(or

3 MO)

3

MO

= 3 MEGOHMS

2-WATT

TOLERANCE

RESISTOR COLOR CODE

II'.

*-----===i

Gold

5%

Silver 10%

.-~

l I No Band 20%

•

COLOR

1st

DIGIT

2nd

DIGIT

MULTIPLY

BY

BLAC K a a 1

BROWN I 1

10

RED

2 2

100

ORANGE l l

I,

000

YE

LL

OW

4 4

10

,000

GREEN

5 5 100,000

BLUE

6 6 1,000,000

VIOLET 7 7 10,000,000

GRAY 8 8 100,000,000

WH

IT[

9 q 1,000,000,000

GOLD

1

SI L

VE

R

01

Capacitors

will

be

called

out

by

their

capacitance

value

in,."F (microfarads) or pF (picofarads)

and

type:

ceramic,

Mylar·,

electrolytic,

etc_

Some capacitors

may

have

their

value

printed

in

the

following man-

ner:

EXAMPLES:

151K

=

15

x

10

=

150

pF

759

=

75

x

0.1

=

7.5

pF

First digit

of

capacitor's value: 1

--

__

....

Second

digit of

capacitor's value: 5

____

oJ

Multiplier: Multiply

the

___

--I

first & second digits by

the

proper value from the

Multiplier Chart.

To find the tolerance of

-----J

the capacitor, look

up

this

letter in the Tolerance

columns.

·DuPont

Registered

Trademark

NOTE:

The

letter

"R"

may be

used

at

timesto signify a

decimal point; as in: 2R2 = 2,2 (pF

or

,."F).

MULTIPLIER

TOLERANCE

OF

CAPACITOR

FOR

THE

MULTIPLY

lOp F

OR

LETTER

OVER

NUMBER

BY

LE5 S

10pF

0 I

to

1PF B

1

10

±0.25pF

C

2

100

to.

5pF

D

3 1000 ±I

OpF

F ±I %

4

10,000

±2

OpF

G ±

2'7,

5

100,000

H

±3'70

J t5%

g

0.01

K ±

10%

9

O.

1 M

±20%

Page

7

CHASSIS ASSEMBLY

PARTS LIST

( ) Locate

and

remove

all

of

the

partsfrom

the

main

pack

(parts left

in

the

shipping

carton). Be

sure

you

have

removed

the

items

from

the

carton

as

directed

in

the

"Unpacking"

section.

Unpack

these

parts

and

check

each part

against

the

following list.

The

key

numbers

correspond

to

the

numbers

on

the

"Chassis

Parts

Pictorial"

(Illustration Booklet,

Page

1).

Set

aside

any

re-

KEY

HEATH

No.

Part

No.

QTY.

DESCRIPTION

CIRCUIT

Compo No.

ELECTRONIC COMPONENTS

NOTE:

The

following resistors

have

a

tolerance

of

10%

unless

otherwise

noted.

10%

is

indicated

by

a fourth

color

band

of

silver.

A1

1-20

10

kfl,

1/2-watt (brown-

R2

black-orange) resistor

A2

1-42-2 150

fl,

2-watt (brown-green-

R1

brown) resistor

A3

21-71

.001

fotF

(1000

pF)

ceramic

C1

capacitor

A4

25-842 77,000

fotF

electrolytic

C2

capacitor

A5

25-843 2 2200

fotF

electrolytic

C3,C4

capacitor

A6

57-27 4 1

N2071

diode

03,04,

05,

06

A7

100-1708 Oiode assembly

01/02

A8

54-940 Power transformer

T1

A9

60-54 120/240 slide switch SW2

A10 60-608 NOR/LOW slide switch SW3

A11

60-619 Rocker switch

SW1

A12

401-163 Speaker

SP1

A13

421-23 1-ampere, slow-blow fuse

F1

maining

parts

not

called

for

in

this

Parts List.

They

will

be

called for later.

To

order

a

replacement

part, always

include

the

PART NUMBER. Use

the

Parts

Order

Form

furnished

with

this

kit.

If

one

is

not

available, see

"Replacement

Parts"

inside

the

rear

cover

of

this

Manual. Forprices,

refer to

the

separate

"Heath

Parts Price List."

KEY

HEATH

No. Part No.

HARDWARE

QTY.

DESCRIPTION

CIRCUIT

Compo No.

Hardware

packets

are

marked

to

show

the

size of

the

hardware

they

contain

(HOW

#4,

or,

HOW

#2,

&

#6,

etc.).

You

may

have

to

open

more

than

one

packet

-in this

pack-

to

locate

all of

the

hardware

of

anyone

(#6,

for

example)

size.

#6

Hardware

B1

250-56

41

6-32 x 1/4" screw

B2

250-305 6 6-32 x 1/4" hex stud

B3

250-89

10

6-32 x 3/8" screw

B4

251-8 2 6-32 spade bolt

B5

252-3 6 6-32 nut

B6

252-22 4 6-32 Speed

Nut'

B7

252-80 2 6-32 cap nut

88

252-195

20

6-32

self-retaining nut

B9

253-60 2

#6

flat washer

810

254-1

21

#6

lockwasher

811

255-79 3 6-32 shoulder spacer

812

259-1

2

#6

solder lug

*Registered

Trademark,

Tinnerman

Co.

PageS

KEY

HEATH

OTY.

DESCRIPTION

No.

Part

No.

Hardware (cont'd.)

#8

Hardware

Cl

250-98 6 8-32 x1/2" screw

C2 252-4 6 8-32 nut

C3 252-706 4 8-32 lock nut

C4 253-45 4

#8

flat washer

C5 254-2 6

#8

lockwasher

Other Hardware

Dl

250-1256 2 10-32 x 1/4" screw

D2

254-3 2 #

10

lockwasher

D3 259-26 4

#10

solder lug

D4

252-193 2 Push-on nut

D5 259-22 Spade lug

06

253-8 Brass flat washer

SHEET METAL PARTS

El

200-1296-1 Chassis

E2

203-1891-1 Top cover

E3

203-1892-1 1 Front panel

E4

204-2265 2 Circuit board mounting

bracket

E5 204-2267-1 Cable clamp

E6

204-2292 Tie bracket

E7 206-1249 AC shield

E8

206-1250 Capacitor shield

E9

207-98 Capacitor mounting strap

E10 207-622 Circuit board support clamp

WIRE

344-7 1'6" Large black wire

344-33

2'

Medium black wire

344-111 6'3" Orange wire

344-118 1'3" Large red wire

344-120 2'6" Small black wire

344-121 4' White wire

347-55 7'fJ' 8-wire cable

89-54 Line cord

0

y..

% %

(INCHES)

2

1'(8 I

3:8

I

5{B

I

7;8

I , I I I I I, I

I ! i I i !

"if

i

I"

i)

i I i

0 5 1

(eM)

2 3 4 5 6

CIRCUIT

Compo

No.

3

KEY

HEATH

OTY.

DESCRIPTION

CIRCUIT

No.

Part

No.

Compo

No.

PRINTED

MATERIIAL

Fl

390-1357 Model label

390-1415 Instruction card

F2 390-926 Warning label

F3 391-34 Blue and white label

F4 391-611 Nameplate

F5 390-1371 Keyboard label set

597-260 Parts Order Form

597-1656 Heath User's Group

(HUG) Application

597-1659 HUG return envelope

Assembly Manual (See

Page 1 for part number.)

Operation Manual (See

Page 1 for part number.)

Software Manual (See

Page 1 for part number.)

MISCELLANEOW,

G1

354-7 2 Large cable tie

G2 73-3 1 Rubber grommet

G3 261-20 4 Rubber foot

G4 352-31 Thermal compound*

G5 423-11 Fuseholder

G6 434-148 1 AC socket

G7 432-946 20 25-pin plug

G8 75-736 1 Strain relief

G9 432-120 2 PCB connector

Gl0

73-39

18"

Foam tape

G111

490-5 Nut starter

Gl'!

490-111 IC lifter

Gl~1

490-185 Package of Soder Wick*-

203-1879 Set of side panels

containing:

G14

203-1877 Right side

panel

G1ti 203-1878 Left side

panel

G1E>

446-683 Window

GH

354-5 Small cable tie

85-1936-1 Mother circuit board

701-29 3-ring binder

703-12 Set of 5 tabs (for

binder)

880-1 System software

cassette tape (Assember,

Editor, Basic, Debug)

Solder

*Dow

Corning

thermal

heat

sink

compound

contains

Zinc

Oxides,

Si0

2,

and

slight

traces

of

CO

2,

**I~egistered

Trademark,

Solder

Removal

Company

4 5 6 7

iii

I ! I i

I I i I i I i Ii I

i i I

I ! i I I I i i I

I i i I i I I II i ! I I I

I

8 9

10

11

12

13

14

15

16

17

Page

9

STEP.BY·STEP ASSEMBLY

MOTHER CIRCUIT BOARD

ASSEMBLY

In

the

following

steps,

you

will

be

given

detailed

instructions

on

how

to

install

and

solder

the

first

part

on

the

circuit

board. Read

and

perform

each

step

carefully.

Then

use

the

same

procedure

whenever

you

install

parts

on

a

circuit

board.

[ )

Position

the

mother

circuit

board

as

shown

in

the

identifi-

cation

drawing

with

the

printed

side

[not

the

foil side)

up.

( )

R2:

Hold

a 10

kO

(brown-

black-orange) resistor by

the

body

as

shown

and

bend

the

leads

straight

down.

( )

Push

the

leads

through

the

holes

at

the

indicated

location

on

the

circuit

board.

The

end

with

color

bands

may

be

positioned

either

way.

( )

Press

the

resistor

against

the

cir-

cuit

board.

Then

bend

the

leads

outward

slightly

to

hold

the

re-

sistor

in

place.

PART

NUMBER

1+

+

I

IDENTIFICATION

DRAWING

+

PICTORIAL 1-1

CONTI

NUEv

. ( )

Solder

the

resistor

leads

to

the

circuit

board

as follows:

1.

Push

the

soldering

iron

tip

against

both

the

lead

and

the

circuit

board

foil.

Heatboth for

two

or

three

seconds.

SOLDERING

I

RON

COMPONENT

~

~~~ClRCUIT

BOARD

2.

Then

apply

solder

to

the

other

side

of

the

connec-

tion.

IMPORTANT: Let

the

heated

lead

and

the

circuit

board

foil

melt

the

solder.

3. As

the

solder

begins

to

melt,

allow

it

to

flow

around

the

connection.

Then

remove

the

solder

and

the

iron

and

let

the

connection

cool.

SOLDERING

I

RON

FO

IL

( ) Cut off

the

excess

lead

lengths

close

to

the

connection.

WARN-

ING: Clip

the

leads

so

the

ends

will

not

fly

toward

your

eyes.

Check

the

connection.

Compare

it

to

the

illustrations

on

Page

10.

After

you

have

checked

the

sol-

der

connections,

proceed

with

the

assembly

on

Page

11.

Use

the

same

soldering

procedure

for

each

connection.

Page

10

A GOOD SOLDER CONNECTION

1-------------------,

I

SOLDER

FLOWS

OUTWARD

AND

GRADUALLY

BLENDS

WITH

THE

FOIL

AND

THE

LEAD

I

When

you

heat

the

lead

and

the

circuit

board

foil at

the

same I

I time.

the

solder will flow evenly

onto

the

lead

and

the

foil. I

I

The

solder will make a good electrical

connection

between I

L.

t!!!:

~'!.!r!!,

~

.!!!i~

________

__

.

__

~

POOR SOLDER CONNECTIONS

-----------------------------~-----,

I

SOLDER

DOES

NOT

FLOW

,./

,.

I

ONTO

LEAD. A DARK

ROSIN,.

,.~

'/SOLDERING

I

BEAD

SURROUNDS

AND

IN-

,/

,./

SOLDER

APPEARS

TO

FLOW

///.---..

IRON I

SULATES

THE

LEAD

FROM

ROSIN

/~

/ INWARD

AND

SET

ON

TOP

///

/ POSITIONED

I

THE

CONNECTION

//

/ SOLDERING

OF

THE

FOIL. -l

////

INCORRECTLY I

///"'-

IRON

:

FOil

l:~"

1~~SoIJ~rNlDy

~;:;:;0W:;~':;::;Z'2&:§:'2""""""

VROSIN

I

I I

I

When

the

lead is not

heated

sufficiently.

the

solder

When

the

foil is not heated sufficiently

the

solder will

II

will not flow onto

the

lead as

shown

above.

To

cor- blob on

the

circuit board as

shown

above. To correct.

I

recto

reheat the

connection

and. if necessary.

apply

a reheat

the

connection and, ifnecessary.

apply

a small I

I small

amount

of

additional

solder

to obtain a good

amount

of

additional

solder to obtain a good connec- 1

Lconnection. tion. I

------------------------------------"

SOLDER

BRIDG)~S

A solder bridge

between

two

adjacent foils is

shown

in photograph

A.

Photograph

B

shows

how

the

con-

nection

should

appear. A solder bridge may occur if

you

accidentally

touch

an

adjacent previously sol-

dered

connection, if

you

use

too

much

solder. or if

you

"drag"

the

soldering iron across

other

foils asyou

remove it from

the

connection. A good

rule

to follow

is; always take a good lookat

the

foil area

around

each

lead before you solder it.

Then.

when

you solder

the

connection, make sure

the

solderremains

in

this

area

and

does not bridge to

another

foil.

This

is especially

important

when

the

foils aresmall

and

closetogether.

NOTE:

It

is alright for solder to bridge

two

connec-

tions on

the

same foil.

Use only

enough

solder to make a good connection.

and

lift

the

soldering iron straight

up

from

the

circuit

board.

If

a solder bridge

should

develop,

turn

the

circuit hoard foil-side-down

and

heat

the

solder be-

tween

connections.

The

excess solder will

run

onto

the

tip of the soldering iron.

and

this will remove

the

solder bridge. NOTE:

The

foil

side

of each circuit

board has a coating

on

it called

"solder

resist."

This

is

a protectiveinsulationtohelp preventsolderbridges.

B

A

SOLDER

BRIDGE

Heath Company Heathkit H8 Manual de usuario

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