Elenco Diode Transistor Tester Kit User Manual
TRANSISTOR - DIODE TESTER KIT
MODEL DT-100K
Assembly and Instruction Manual
Copyright © 2014, 1988 by ELENCO®All rights reserved. Revised 2014 REV-R 753110
No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.
ELENCO
®
-1-
Qty. Description Part #
! 1 PC board 511100
! 1 Switch push button 540001
with 1/4” nut and washer
! 2 Switch DPDT 541111
! 1 Battery snap 590098
! 1 Battery clip 590099
! 1 Knob 622009
! 1 Case top 623061
! 1 Case bottom 623062
! 5 Spacer LED 624111
! 4 Screw M3 x 0.5 x 5mm 640300
! 4 Screw 2.8 x 8mm 641102
! 1 7mm Hex pot nut 644101
! 1 8mm x 14mm Washer 645101
! 1 Lockwasher 5/16” 646101
Qty. Description Part #
! 4 Rubber feet 662015
! 1 Socket 8-Pin IC 664008
! 1 Transistor socket 664500
! 1 Alligator clip black 680001
! 1 Alligator clip red 680002
! 1 Alligator clip green 680003
! 1 Alligator clip yellow 680004
! 1 Label top panel 723070
! 4” Double-sided tape 740020
! 1 Wire black 15” 813110
! 1 Wire red 15” 813210
! 1 Wire yellow 15” 813410
! 1 Wire green 15” 813510
! 1 Wire blue 3” 814620
! 1 Solder tube lead-free 9LF99
DT-100 PARTS LIST
If you are a student, and any parts are missing or damaged, please see instructor or bookstore.
If you purchased this transistor–diode tester kit from a distributor, catalog, etc., please contact ELENCO
®
(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
Qty. Symbol Value Color Code Part #
! 1 R14 100Ω 5% 1/4W brown-black-brown-gold 131000
! 2 R5, R6 220Ω 5% 1/4W red-red-brown-gold 132200
! 2 R1, R10 330Ω 5% 1/4W orange-orange-brown-gold 133300
! 1 R13 1kΩ 5% 1/4W brown-black-red-gold 141000
! 1 R7 5.6kΩ 5% 1/4W green-blue-red-gold 145600
! 1 R12 10kΩ 5% 1/4W brown-black-orange-gold 151000
! 1 R8 18kΩ 5% 1/4W brown-gray-orange-gold 151800
! 2 R2, R3 33kΩ 5% 1/4W orange-orange-orange-gold 153300
! 1 R9 47kΩ 5% 1/4W yellow-violet-orange-gold 154700
! 1 R11 100kΩ 5% 1/4W brown-black-yellow-gold 161000
! 1 R4 330kΩ 5% 1/4W orange-orange-yellow-gold 163300
! 1 R15 100kΩ 5% 1/4W Potentiometer 192611
CAPACITORS
Qty. Symbol Value Description Part #
! 1 C6 .001µF (102) Discap 231036
! 3 C2, C3, C5 .01µF (103) Discap 241031
! 2 C1, C4 10µF Electrolytic 271045
SEMICONDUCTORS
Qty. Symbol Value Description Part #
! 1 D1 1N4001 Diode 314001
! 1 Q5 MPS A70 Transistor 320070
! 4 Q1-Q4 2N3904 Transistor 323904
! 1 IC1 555 Integrated circuit (IC) 330555
! 5 L1-L5 Light emitting diode (LED) 350002
MISCELLANEOUS
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PARTS VERIFICATION
Before beginning the assembly process, familiarize yourself with the components and this instruction book.
Verify that all of the parts are present. This is best done by checking off the parts in the parts list.
RESISTORS CAPACITOR SEMICONDUCTORS
Electrolytic
(radial)
Diode
100kΩ Potentiometer Transistor LED
Knob
MISCELLANEOUS
Switch DPDT
PC Board
Case top
Case bottom
Screws
2.8 x 8mm
M3 x 0.5 x 5mm
7mm
Nuts Washers
Flat
8 x 14mm
Lockwasher 5/16”
Rubber foot
Spacer LED
Label
Lead-free solder
Carbon film
8-pin Socket555 ICDiscap
Battery snap
Transistor
socket
Push button switch with
1/4” nut and washer
Alligator clip
Wires
Double-sided tape
Battery clip
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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
Introduction
The most important factor in assembling your DT-100K Transistor Diode Kit is good soldering techniques. Using the proper soldering iron
is of prime importance. A small pencil type soldering iron of 25 watts is
recommended. The tip of the iron must be kept clean at all times
and well-tinned.
Solder
For many years leaded solder was the most common type of solder
used by the electronics industry, but it is now being replaced by leadfree solder for health reasons. This kit contains lead-free solder, which
contains 99.3% tin, 0.7% copper, and has a rosin-flux core.
Lead-free solder is different from lead solder: It has a higher melting
point than lead solder, so you need higher temperature for the solder to
flow properly. Recommended tip temperature is approximately 700OF;
higher temperatures improve solder flow but accelerate tip decay. An
increase in soldering time may be required to achieve good results.
Soldering iron tips wear out faster since lead-free solders are more
corrosive and the higher soldering temperatures accelerate corrosion,
so proper tip care is important. The solder joint finish will look slightly
duller with lead-free solders.
Use these procedures to increase the life of your soldering iron tip when
using lead-free solder:
• Keep the iron tinned at all times.
• Use the correct tip size for best heat transfer. The conical tip is the
most commonly used.
• Turn off iron when not in use or reduce temperature setting when
using a soldering station.
•
Tips should be cleaned frequently to remove oxidation before it becomes
impossible to remove. Use Dry Tip Cleaner (Elenco®#SH-1025) or Tip
Cleaner (Elenco®#TTC1). If you use a sponge to clean your tip, then use
distilled water (tap water has impurities that accelerate corrosion).
Safety Procedures
• Always wear safety glasses or safety goggles to
protect your eyes when working with tools or
soldering iron, and during all phases of testing.
• Be sure there is adequate ventilation when soldering.
•
Locate soldering iron in an area where you do not have to go around
it or reach over it. Keep it in a safe area away from the reach of
children.
• Do not hold solder in your mouth. Solder is a toxic substance.
Wash hands thoroughly after handling solder.
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.
DO NOT USE ACID CORE SOLDER!
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