background image

Install the power cord as shown in Figure 9. Pull
the power cord wires apart about 2 inches on
one end. Strip the insulation off of both wires to
expose 1/4” of bare wire. Note that one wire is
ribbed on the edge. Solder the red alligator clip
to the ribbed wire. Solder the black clip to the
smooth wire. On the other side of the power
cord, pull the wires apart 1/2”.

Strip 1/4” of

insulation off of both wires. Make a knot to serve
as a strain relief (about 1 inch from the end).
Solder the ribbed wire to the hole marked “+” and
the smooth wire to the hole marked “–”.

Install the pulser tip as shown in Figure 10.
Using the 1 1/2” wire, strip 1/4” of insulation off of
both ends. Solder one end to point P on the PC
board. Solder the other end of the wire to the
pulser tip groove.

Punch out the five holes in the front label. Peel
the backing off the front and back labels and
stick them to the case as shown in Figure 11.
The front label should be placed toward the back
of the indent (toward the 3 pins) so that the LED
and switch holes align with the case holes.

Insert the 3 pins P1, P2, and P3 into their holes in
the front label. Insert the PC board into the case
so that the LED and switch protrude through the
label (see Figure 11). Insert the 3 pins into the
PC board and solder (see Figure 4).

Place the unit into the case bottom and fasten
with two #4 screws. Do not over-tighten or the
holes may strip out.

Cut a 13/16” piece of red shrink tubing and slide
it over the pulser tip until it touches the plastic
case. Shrink the tubing by heating it with your
soldering iron. Be sure the soldering iron does
not contact the tubing or plastic case.

This completes the assembly procedure. Your Logic
Probe is now ready for testing.

-7-

Figure 9

Solder the wire to the clip, then bend
the tabs over the insulated wire.

Clip

Smooth Wire

Ribbed Wire

Figure 10

Figure 11

Red Shrink
Tubing

Front Label

#4 x 5/8” Screws

Back Label

Case (top)

Assembled
PC Board

Case (bottom)

Place knot
in case

Summary of Contents for LP-425K

Page 1: ...LOGIC PULSER KIT MODEL LP 425K Assembly and Instruction Manual Elenco Electronics Inc Copyright 1995 Elenco Electronics Inc REV D Revised 2002 753262...

Page 2: ...or damaged please see instructor or bookstore If you purchased this kit from a distributor catalog etc please contact Elenco Electronics address phone e mail is at the back of this manual for additio...

Page 3: ...ient current for a short period of time This will not harm the components under test since the average current is very small The injected voltage is produced by the transient current flowing through t...

Page 4: ...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 allo...

Page 5: ...10 100kW Resistor brown black yellow gold R6 1 8MW Resistor brown gray green gold R13 2kW Resistor red black red gold R3 1 8MW Resistor brown gray green gold R12 20kW Resistor red black orange gold se...

Page 6: ...5 see Figure 3B C3 01mF Mylar Capacitor May be marked 103 C4 001mF Mylar Capacitor May be marked 102 D4 1N4001 Diode see Figure 2 D2 1N5246 Zener Diode see Figure 2 C2 22mF Lytic Capacitor see Figure...

Page 7: ...e direction shown on the top legend Figure 8 Insert the tabs and terminals into the PC board Solder terminals only Figure 6 6 Flat Tubing 3 8 Q3 2N3906 Transistor see Figure 7 Q4 2N3904 Transistor see...

Page 8: ...case as shown in Figure 11 The front label should be placed toward the back of the indent toward the 3 pins so that the LED and switch holes align with the case holes Insert the 3 pins P1 P2 and P3 i...

Page 9: ...orrect type and is mounted with the flat side as shown on the PC board e Check the soldering and the values of capacitors C1 through C5 f Check the soldering and the values of resistors R1 through R5...

Page 10: ...9 SCHEMATIC DIAGRAM Note All resistors are 5 1 4W IC 74C04 or 4069 Schematic Diagram LP 425...

Page 11: ...and ground for the remaining _________ A 50 50 B 20 80 C 90 10 D 60 40 9 The Sync Input Terminal SYNC Logic Pulser can be used to produce an externally synchronized signal at the ____________ A outpu...

Page 12: ...Elenco Electronics Inc 150 W Carpenter Avenue Wheeling IL 60090 847 541 3800 http www elenco com e mail elenco elenco com...

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