Heathkit IM 17 Manual

Page 1

77,?73W7 fl

PRICE $2.00

HE'ATI-IKITQ

_I-IE.A.THKIT ,

UTILITY SOLID-STATE VOLTMETER

MODEL IM-17

595-921-03

Page 2

This chart is a guide to commonly used types of elec-
tronic components. The symbols and related illustra-

TYPICAL COMPONENT TYPES

tions should prove helpful in identlf
reading the schematic diagrams.

ying most parts and

RESISTOR

GRID TUBE
CATHODE
/ FILAMENT

POTENTIOMETER v.

ELECTROLYTIC PN p coLLEcroR
(CONTROL) CAPACITOR TRANSISTOR
BASE
EMITTER
COLLECTofi
NPN EMITTER

RECTIFIER
I (DIODE)

TRANSFORMER

| | (ADJUSTABLE

' POWDERED IRON
l I CORE)ARROW
I I INDICATES DIR-
| I

ECTIoN 0F CORE
MOVEMENT To ~

TRANSFORMER 7
I
(ADJUSTABLE
CORE)

ILLUMINATING -
BULB &

PHONE
O JACK
___[l

~__./r
SPST SWITCH

8 METER m
. a

INDUCTOR
(COIL) fl SOGGLE)
l
_. 0'".-
DPDT
PIEZOELECTRIC ' SWITCH
[I CRYSTAL SPEAKER (ROTARY)
I O
D
O
O O
I
BINDING 0
POST [ MICR PHONE FUSE
i,
CONDUCTORS
, III'77 EARTH GROUND
ANTENNA ['3 - ::::::
_J_
GENERAL _ Loop ? CHASSIS GROUND

NOT
CONNECTED CONNECTE

DSHIELDED

Assembly
and
Operation

of the
HEATI-IKI-re

UTILITY SOLI D-STATE

VOLTMETER

Model IM-17

HEATH COMPANY

BENTON HARBOR, MICHIGAN 49022

I

TABLE OF CONTE NTS

Introduction...............
Parts List................

Step-By-Step Assembly
Rotary Switch Prewiring. .

Circuit Board Assembly. . . .
Panel Parts Mounting. . . . .
Panel Wiring. . .......--
Circuit Board Wiring. . . . . .
Final Wiring. . .

Calibration.............
Final Assembly. . . .........
Operation...l..............
Maintenance...............
Accessory Probes...........

In Case Of Difficulty. . . . . . . . .
Factory Repair Service. . . . . .

Troubleshooting Chart. . . . . . . .
SpecificatiODS. . . . . . . . . . . . . .
Circuit Description. . . . . . . . . .
Functional Parts List. . . . . . . .
Photograph. . . . ...........
Circuit Board X-Ray View. . . . .
Voltage Chart..............
Replacement Parts Price List. . .
Schematic (fold-out from Page). .

Applications (fold-out from Page).

...-o

24

25
26
2'7
28
29
30
30
31
31

32

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\E/

itrol

'01 B

r the
The
' two

vire:

lugs
fore
is of

8 of
'7 of
cted
yair.

50f

40f

cted
air.

lide

lide

:ted
air.

m-

-I-IEATHKIT=

) Prepare the following lengths of hookup wire:

1" red

1" black
3-1/2" red
3-1/2" black
3-1/2" black
4- 3/4" White

(V/(Connect a 1" red wire between lugs 315-1)
and 4 (NS) of slide switch D.

(WConnect a 1" black wire between lugs 1 (NS)
and 6 (S-1) of slide switch D.

, Connect a 3-1/2" red wire to lug 4 of slide
switch D (8-2).

(, Connect a 3-1/2" black wireto lugl of slide
switch D (8-2).

(\1) Twist together the red from lug 4 andblack
wire from lug 1 of slide switch D.

Wehneot a 3-1/2" black wire to lug 50f slide
switch D (S-l).

("flfléfigect a 4-3/4" white wire to lugZ of slide
switch D (S-l).

(ii. wist together the black wire from lug 5 and
white wire from lug 2 of slide switch D.

CIRCUIT BOARD WIRING

Refer to Pictorial 8 (fold-out from this Page)
for the following steps.

(\é Prepare the following lengths of hookup wire:

1" white
1-1/4" white
3" red

3" black

( Mnnecta'l" length of white wire from lug 5
of the Bias Adj control (8-1) to circuit
board hole M (8-1).

( Connect a 1-1/4" length of white wire from
lug 1 of the Bias Adj control (S-1)to circuit
board hole L (8-1).

(V/Connwt one end ofa 3" red wire to hole F in
the circuit board (8-1).

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MConnect one end of a 3"b1ack wire to hole E
in the circuit board (S-l).

(I)/Twist these two wires together to form a
twisted pair. Position them as shown.

( W Connect the free end of the blacktest lead to
circuit board hole K (S-l).

Connect the twisted wires from control B as
follov/s:

Red wire to lug 2 on the Bias Adj control
(S-l).

(\KWhite wire to lug 6 on the Bias Adj con-
trol (S-l).
(«Black wire to circuit board hole N (S-l).
Connect the wires from switch E to the circuit
boyd as follows:
( ,) Either white wire to hole P (8-1), and the
other white wire to hole R (S-l).
Wither black wire to hole T (8-1), and the
tier black wire to hole s (3-1).
Either red wire to hole W (S-1), and the
other red wire to hole U (S-l).

(\/Connect the loose end of the red test lead
to lug B9 of the rotary switch (S-l).

Connect the red and black twisted pair from
slidf switch D as follows:
(

Red wire to circuit board hole J (S-l).
(«Black wire to circuit board hole H (S-l).

Co ect the black and white twisted pair from
sli 6 switch D to the rotary switch as follows:

(J) White wire to lug A10 (S-l).

( Dlack wire to lug A4 (S-l).
) Connect the inner lead of the 5-1/2" shielded
cable from phone jack F to lug C4 of the ro-

tary switch (8-1), and the shield to circuit
board hole G'(S-1).

355°??? INSET

2:33;:

SIDE VIEW

PICTORIAL 8