Elenco Electronics M-1006K Assembly And Instruction Manual

DIGITAL MULTIMETER KIT

MODEL M-1006K

Assembly and Instruction Manual

Elenco Electronics, Inc.

Copyright © 2001 Elenco Electronics, Inc. 753096

PARTS LIST

If you are a student, and any parts are missing or damaged, please see instructor or bookstore.
If you purchased this meter kit from a distributor, catalog, etc., please contact Elenco Electronics
(address/phone/e-mail is at the back of this manual) for additional assistance, if needed. DO NOT contact your
place of purchase as they will not be able to help you.

RESISTORS

(Parts mounted on card.)

Qty. Symbol Value Color Code Part #

1R9 .01Ω Shunt Wire 100161
1R8 .99Ω .5% 1/4W black-white-white-silver-green 109930
1R7 9Ω .5% 1/4W white-black-black-silver-green 119000
1 R13 100Ω 5% 1/4W brown-black-brown-gold 131000
1 R6 100Ω .5% 1/4W brown-black-black-black-green 131050
1 R5 900Ω .5% 1/4W white-black-black-black-green 139050
1 R17 910Ω 1% 1/4W white-brown-black-black-brown 139130
1 R12 1kΩ 5% 1/2W brown-black-brown-gold 141000
1 R14 4.7kΩ 5% 1/4W yellow-violet-red-gold 144700
1R4 9kΩ .5% 1/4W white-black-black-brown-green 149050
1 R15 30kΩ 1% 1/4W orange-black-black-red-brown 153030
1 R3 90kΩ .5% 1/4W white-black-black-red-green 159050
1 R25 100kΩ 5% 1/4W brown-black-yellow-gold 161000
3 R10, R11, R24 220kΩ 5% 1/4W red-red-yellow-gold 162200
1 R2 352kΩ .5% 1/2W orange-green-red-orange-green 163551
5 R18 - R22 470kΩ 5% 1/4W yellow-violet-yellow-gold 164700
1 R1 548kΩ .5% 1/2W green-yellow-gray-orange-green 165451
1 R23 1MΩ 5% 1/4W brown-black-green-gold 171000

Placed in bag with carded parts.

1 R16 200Ω (201) Potentiometer 191310

CAPACITORS

Qty. Symbol Value Description Part #

1 C1 100pF (101) Disc 221017
4 C2, C3, C4, C6 .1µF (104) Mylar (small yellow) 251017S
1C5 .1µF (104) Mylar 251017

SEMICONDUCTORS

Qty. Symbol Value Description Part #

1 D1 1N4007 Diode (mounted on resistor card) 314007

MISCELLANEOUS

-1-

Qty. Description Part #

1 LCD 351115
2 Zebra 500006
1 PC Board IC Installed 516101
1 Fuse 0.2A, 250V 533002
1 Batter y 9V 590009
1 Batter y Snap 590098
1 Selector Knob 622104
1 Case Top (Black) 623113
1 Case Bottom (Black) 623209
1 Zebra Frame 629012
3 Screw 2mm x 6mm 643439

Qty. Description Part #

2 Screw 2mm x 10mm 643447
2 Fuse Holder Clips 663100
1 Socket Transistor 664007
3 Input Socket 664101
2 Ball Bearing 666400
6 Slide Contact 680013
2 Spring 1/4” (Selector Knob) 680014
1 Label Front 724012
1 Grease 790004
1 Solder Tube 9ST4
1 Test Lead Set RWTL1000B

NOTE:

Not used but printed on PC board: R26 - R29, T1
The 7106 IC1 is already installed on the PC board. This type of installation is called C.O.B. (chip on

board). The IC is tested after it is installed on the PC board.

-2-

IDENTIFYING RESISTOR VALUES

Use the following infor mation as a guide in proper ly identifying the value of resistors.

5 Bands

1 2

Multiplier

Tolerance

Resistors

PARTS IDENTIFICATION

PC Board with IC

Potentiometer

Ball Bearing

Selector Knob

Battery Snap

Fuse

Clip

Slide

Contact

Transistor

Test Socket

Fuse

Input Socket

3

4 Bands

1

2

Multiplier

Tolerance

Diode

Shunt Wire

LCD Assembly

Zebras/LCD/Frame/Cover

Capacitors

Discap

Mylar

C5

Abbreviation Means Multiply Unit By Or

p pico .000000000001 10

-12

n nano .000000001 10

-9

µ micro .000001 10

-6

m milli .001 10

-3

– unit 1 10

0

k kilo 1,000 10

3

M mega 1,000,000 10

6

1,000 pico units = 1 nano unit
1,000 micro units = 1 milli unit
1,000 units = 1 kilo unit

1,000 nano units = 1 micro unit
1,000 milli units = 1 unit
1,000 kilo units = 1 kilo unit

METRIC UNITS AND CONVERSIONS

IDENTIFYING CAPACITOR VALUES

Capacitors will be identified by their capacitance value in pF (picofarads), nF (nanofarads), or µF (microfarads). Most
capacitors will have their actual value printed on them. Some capacitors may have their value pr inted in the following
manner. The maximum operating voltage may also be printed on the capacitor.

Second Digit

First Digit

Multiplier
Tolerance*

For the No.01234589
Multiply By 1 10 100 1k 10k 100k .01 0.1

Multiplier

Note: The letter “R” may be used at times to
signify a decimal point; as in 3R3 = 3.3

10µF 16V

103K

100V

The letter M indicates a tolerance of +20%
The letter K indicates a tolerance of +

10%

The letter J indicates a tolerance of +5%

Maximum Working Voltage

The value is 10 x 1,000 =
10,000pF or .01µF 100V

*

Zebra

Frame

Zebras

LCD

-3-

Introduction

The most important factor in assembling your M-1006K Digital Multimeter Kit is good soldering techniques.
Using the proper soldering iron is of prime impor tance. A small pencil type soldering iron of 25 - 40 watts is
recommended.The tip of the iron must be kept clean at all times and well tinned.

Safety Procedures

• Wear eye protection when soldering.

•

Locate soldering iron in an area where you do not have to go around it or reach over it.

• Do not hold solder in your mouth. Solder contains lead and is a toxic substance. Wash your hands
thoroughly after handling solder.

• Be sure that there is adequate ventilation present.

Assemble Components

In all of the following assembly steps, the components must be installed on the top side of the PC board unless
otherwise indicated. The top legend shows where each component goes. The leads pass through the
corresponding holes in the board and are soldered on the foil side.

Use only rosin core solder of 63/37 alloy.
DO NOT USE ACID CORE SOLDER!

CONSTRUCTION

Solder

Soldering Iron

Foil

Solder

Soldering Iron

Foil

Component Lead

Soldering Iron

Circuit Board

Foil

Rosin

Soldering iron positioned
incorrectly.

Solder

Gap

Component Lead

Solder

Soldering Iron

Drag

Foil

1. Solder all components from

the copper foil side only.
Push the soldering iron tip
against both the lead and
the circuit board foil.

2. Apply a small amount of

solder to the iron tip. This
allows the heat to leave the
iron and onto the foil.
Immediately apply solder to
the opposite side of the
connection, away from the
iron. Allow the heated
component and the circuit
foil to melt the solder.

1. Insufficient heat - the
solder will not flow onto the
lead as shown.

3. Allow the solder to flow
around the connection.
Then, remove the solder
and the iron and let the
connection cool. The
solder should have flowed
smoothly and not lump
around the wire lead.

4.

Here is what a good solder
connection looks like.

2. Insufficient solder - let the
solder flow over the
connection until it is
covered. Use just enough
solder to cover the
connection.

3. Excessive solder - could
make connections that you
did not intend to between
adjacent foil areas or
terminals.

4. Solder bridges - occur
when solder runs between
circuit paths and creates a
short circuit. This is usually
caused by using too much
solder. To correct this,
simply drag your soldering
iron across the solder
bridge as shown.

What Good Soldering Looks Like

A good solder connection should be bright, shiny,
smooth, and uniformly flowed over all surfaces.

Types of Poor Soldering Connections

-4-

ASSEMBLY INSTRUCTIONS

Identify and install the following parts as shown. After soldering each part, mark a check in the box provided.
Be sure that solder has not bridged to an adjacent pad.

Figure BFigure A

Stand resistor on end as
shown. Solder and cut
off the excess leads.

C1 - 100pF (101) Discap
C2 -

.1µF (104) Mylar (small yellow)

R22 - 470kΩ 5% 1/4W Resistor

(yellow-violet-yellow-gold)

(see Figure A)

R21 - 470kΩ 5% 1/4W Resistor

(yellow-violet-yellow-gold)

(see Figure A)

R25 - 100kΩ 5% 1/4W Resistor

(brown-black-yellow-gold)

(see Figure A)

R15 - 30kΩ 1% 1/4W Resistor

(orange-black-black-red-brown)

(see Figure A)

R16 -

200Ω (201) Potentiometer

(see Figure B)

R17 - 910Ω 1% 1/4W Resistor

(white-brown-black-black-brown)

(see Figure A)

R14 - 4.7kΩ 5% 1/4W Resistor

(yellow-violet-red-gold)

(see Figure A)

R13 - 100Ω 5% 1/4W Resistor

(brown-black-brown-gold)

(see Figure A)

R19 - 470kΩ 5% 1/4W Resistor
R18 - 470kΩ 5% 1/4W Resistor

(yellow-violet-yellow-gold)

(see Figure A)

Mount the potentiometer to the PC board as shown.

R20 - 470kΩ 5% 1/4W Resistor

(yellow-violet-yellow-gold)

(see Figure A)
C5 - .1µF (104) Mylar
R24 - 220kΩ 5% 1/4W Resistor

(red-red-yellow-gold)

(see Figure A)
C4 -

.1µF (104) Mylar (small yellow)

C3 -

.1µF (104) Mylar (small yellow)

R23 - 1MΩ 5% 1/4W Resistor

(brown-black-green-gold)

(see Figure A)
R6 - 100Ω .5% 1/4W Resistor

(brown-black-black-black-green)

(see Figure A)
R5 - 900Ω .5% 1/4W Resistor

(white-black-black-black-green)

(see Figure A)
R4 - 9kΩ .5% 1/4W Resistor

(white-black-black-brown-green)

(see Figure A)
R3 - 90kΩ .5% 1/4W Resistor

(white-black-black-red-green)

(see Figure A)

-5-

ASSEMBLY INSTRUCTIONS

Identify and install the following parts as shown. After soldering each part, mark a check in the box provided.
Be sure that solder has not bridged to an adjacent pad.

Figure C

Stand diode on end. Mount
with band as shown on the top
legend.

C6 -

.1µF (104) Mylar (small yellow)

R1 - 548kΩ .5% 1/2W Resistor

(green-yellow-gray-orange-green)

R2 - 352kΩ .5% 1/2W Resistor

(orange-green-red-orange-green)

R11 - 220kΩ 5% 1/4W Resistor

(red-red-yellow-gold)

(see Figure A)
R10 - 220kΩ 5% 1/4W Resistor

(red-red-yellow-gold)

(see Figure A)
D1 - 1N4007 Diode

(see Figure C)

R7 - 9Ω .5% 1/4W Resistor

(white-black-black-silver-green)

R8 - .99Ω .5% 1/4W Resistor

(black-white-white-silver-green)

R12 - 1kΩ 5% 1/2W Resistor

(brown-black-brown-gold)

Band

Insert the narrow end of the three input sockets into the PC board from the solder side, as shown in Figure D.
Solder the sockets to the PC board on the component side only. The solder should extend completely around
the socket (see Figure D).

Insert the shunt wire (R9) into the PC board holes from the component side as shown in Figure D. Adjust
the wire so that it sticks out the other (solder) side of the PC board 3/16 of an inch. Solder the wire to the
PC board on the component side only.

Be sure that the 8-pin transistor socket will slide easily through its hole in the top case from either direction.
If it does not, carefully slide it through the hole several times in each direction to remove any burrs. Do not
push on the socket leads or they may be damaged.
Insert the socket into the PC board holes from the solder side as shown in Figure D. Be sure that the tab
lines up with the hole as shown in the figure. Solder the socket to the PC board on the component side of
the PC board as shown in the figure and cut off excess leads.

Feed the battery snap wires up through the holes in the PC board from the solder side as shown in Figure D.
Insert the red wire into the hole marked (9V+) and black wire into hole marked (9V–) as shown. Solder the
wires to the PC board.

Insert the two fuse clips into the PC board holes as shown in Figure D. Be sure that the tabs are on the
outside as shown in the figure. Solder the clips to the PC board.

Install the following parts. Then, mark a check in the box provided.