Elenco 3 1/2 Digit Cap. / Trans. Kit Manual de usuario descargar pdf (Pagina 20)

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PARTS LIST - SECTION C

RESISTORS

Qty. Symbol Description Color Code Part #

r 1 R38 1.87kΩ 1% 1/4W brown-gray-violet-brown-brown 141830

r 1 R37 3kΩ 1% 1/4W orange-black-black-brown-brown 143030

r 1 R39 6.8kΩ 5% 1/4W blue-gray-red-gold 146800

r 1 R34 100kΩ 5% 1/4W brown-black-yellow-brown 161000

r 2 R35, R36 100kΩ 1% 1/4W brown-black-black-orange-brown 161030

r 1 VR2 200Ω Trim Pot 191320

Note: Resistor tolerance (last band) of 5-band resistors may be blue instead of green.

CAPACITORS

Qty. Symbol Value Description Part #

r 1 C7 470pF (471) Disc 224717

r 1 C10 .33μF (334) Mylar (small yellow) 253318L

r 2 C8, C9 4.7μF Electrolytic (Lytic) 264747S

r 1 C11 10μF Electrolytic (Lytic) 271015S

SEMICONDUCTORS

Qty. Symbol Value Description Part #

r 3 D3 - D5 1N4148 Diode (glass) 314148

r 1 IC2 LM324 Op-Amp 330324

MISCELLANEOUS

Qty. Symbol Value Description Part #

r 1 IC Socket 14-pin 664014

SECTION C

AC Voltage & Current Circuit

ASSEMBLE THE FOLLOWING COMPONENTS TO THE PC BOARD

Bottom Legend Side

R37 - 3kΩ 1% 1/4W Res.

(orange-blk-blk-brn-brn)

(see Figure I)

D4 - 1N4148 Diode

D5 - 1N4148 Diode

(see Figure L)

C8 - 4.7μF Lytic Capacitor

(see Figure B)

C10 - .33μF (334) Mylar Cap.

(may be marked 334)

D3 - 1N4148 Diode

(see Figure L)

C7 - 470pF (471) Discap

Figure L

Stand diode on

end. Mount with

band as shown on

the top legend.

R38 - 1.87kΩ 1% 1/4W Res.

(brn-gray-violet-brn-brn)

(see Figure I)

C9 - 4.7μF Lytic Capacitor

(see Figure B)

R35 - 100kΩ 1% 1/4W Res.

(brown-blk-blk-orange-brown)

(see Figure I)

R36 - 100kΩ 1% 1/4W Res.

(brown-blk-blk-orange-brown)

(see Figure I)

Assembled View

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PARTS LIST - SECTION E

RESISTORS

Qty. Symbol Description Color Code Part #

r 1 R29 10Ω 1% 1/4W brown-black-black-gold-brown 121030

r 1 R28 90Ω 1% 1/4W white-black-black-gold-brown 129030

r 1 R45 150Ω 1% 1/4W brown-green-black-black-brown 131530

r 1 R27 900Ω 1% 1/4W white-black-black-black-brown 139030

r 1 R42 1.91kΩ 1% 1/4W brown-white-brown-brown-brown 141930

r 1 R43 4.3kΩ 1% 1/4W yellow-orange-black-brown-brown 144330

r 1 R26 9kΩ 1% 1/4W white-black-black-brown-brown 149030

r 1 R44 10kΩ 1% 1/4W brown-black-black-red-brown 151030

r 1 R47 11kΩ 1% 1/4W brown-brown-black-red-brown 151130

r 2 R40, R41 39kΩ 1% 1/4W orange-white-black-red-brown 153930

r 1 R46 76.8kΩ 1% 1/4W violet-blue-gray-red-brown 157630

r 1 R25 90kΩ 1% 1/4W white-black-black-red-brown 159030

r 1 R48 160kΩ 1% 1/4W brown-blue-black-orange-brown 161630

r 2 R49, R50 220kΩ 5% 1/4W red-red-yellow-gold 162200

r 1 R24 900kΩ 1% 1/4W white-black-black-orange-brown 169030

r 1 VR3 200Ω (201) Trim Pot 191320

Note: Resistor tolerance (last band) of 5-band resistors may be green instead of brown.

CAPACITORS

Qty. Symbol Value Description Part #

r 4 C12 - C15 .01μF (103) Mylar (large brown) 241017L

SEMICONDUCTORS

Qty. Symbol Value Description Part #

r 4 D6 - D9 1N4001 Diode 314001

r 1 IC3 LM324 Op-Amp 330324

MISCELLANEOUS

Qty. Symbol Value Description Part #

r 1 IC Socket 14-pin 664014

r 2h

FE Socket 664015

SECTION E

Capacitance and Transistor Testing Circuit

r Attach the LCD to the PC board using the two 2.5

x 8mm screws. Use the top-mounting hole and

lightly tighten the screws. The screws will be

removed to assemble the next section.

Testing Procedure

1. Place the top label over the knob and turn the

range selector knob to an OHM scale position.

2. Connect the 9V battery to the battery snap.

3. Connect the test leads (red lead to VΩ CAP and

black to COM). Turn the meter on by pressing the

power switch.

4. Test the Ohms, Buzzer, and Diode functions

using the procedures below.

OHMs - Using two or three different value resistors,

check each scale. Compare the kit meter readings

with another meter of known accuracy. If the tests

are not working, check the solder of the PTC.

Buzzer - Set the selector knob to the Buzzer ( )

position. Short the red and black leads and the

buzzer should sound. If the buzzer does not sound,

check components R51-R58, PTC, C16, C17, and

the solder connections to the buzzer.

Diode - Connect a diode to the test leads with the

correct polarity (see figure below). The meter will

range for 100 - 950.

5. Turn the meter off and remove the battery, top

label, and test leads.

6. Remove two display mounting screws and

display by unscrewing the two mounting screws.

DO NOT PROCEED TO SECTION E WITHOUT INSTRUCTOR’S APPROVAL.

COM

VΩ

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Elenco 3 1/2 Digit Cap. / Trans. Kit Manual de usuario Pagina 20

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