Heathkit IM-4100 - Page 26

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22

Ge

gHEATHKIT®

START

@

DPDT

circuit

board

switch.

Operate

the

switch

so

the

‘’120”

reads

as

shown.

Insert

the

switch

lugs

into

the

holes

in

the

circuit

board

and

solder

them

to

the

foil.

NOTE:

Two

fuses

are

supplied

with

this

kit,

a

1/4-ampere

for

120

VAC

line

voltage

and

a

1/8-ampere

for

voltage.

In

the

following

steps,

use

only

the

fuse

that

agrees

with

the

line

voltage

in

your

area.

If

you

use

240

VAC

(1/8-ampere

fuse)

set

switch

SW1

to

read

240.

Cr

First

install

the

fuse

clips

in

the

circuit

board.

Be

sure

to

position

the

fuse

clip

shoulders

as

shown.

Do

not

solder

the

clips

to

the

foil.

Install

the

fuse

into

the

fuse

clip.

Then

solder

the

fuse

clip

lugs

to

the

foil.

Set

SW1

to

the

correct

position

(120

or

240).

SHOULDER

“4

Y1:

Crystal.

Solder

the

leads

to

the

foil

and

cut

off

the

excess

lead

lengths.

240

VAC

line]

IDENTIFICATION

DRAWING

Y

The

steps

performed

in

this

Pictorial

are

in

this

area

of

the

circuit

board.

eae

:

8

WHEW

XK

&

WULEEZEEEE.

[

il

PICTORIAL

2-9

PART

NUMBER

CONTINUEY

%

C16:

6000

pF

electrolytic.

When

you

install

electrolytic

capacitors,

always

match

the

positive

(+)

mark

on

the

capacitor

with

the

positive

(+)

mark

on

the

circuit

board.

Solder

the

leads

to

the

foil

and

cut

off

the

excess

lead

lengths.

(WW

Secure

C16

to

the

circuit

board

with

a

cable

ties

as

shown

(with

the

rough

side

of

the

cable

tie

on

the

inside).

Cut

off

the

excess

length.

&

CABLE

TIE

fs

ROUGH

SIDE

v4

C7:

7-25

pF

trimmer.

Solder

the

/

\ugs

to

the

foil.

CIRCUIT

BOARD

CHECKOUT

Carefully

inspect

the

circuit

board

for

the

following

conditions.

(~}~unsoldered

connections.

;

}

t-})-

“Cold”

solder

connections.

(~f>

Solder

bridges

between

foil

patterns.

Protruding

leads

which

could

touch

together.

Integrated

circuits

for

the

proper

type

and

installation.

Electrolytic

capacitors

for

the

correct

position

of

the

positive

(+)

end.

“

Diodes

for

the

correct

position

of

the

banded

end.