background image

Figure F

Lytics have a polarity marking on
them indicating the negative lead, the
opposite lead is positive.

The PC

board is marked to show the positive
(+) lead position. Mount the capacitor
with the positive (+) lead in the hole
marked on the PC board. Bend the
capacitor over.

R6 - 100

.5% 1/4W Res.

(brown-blk-blk-blk-green)

(see Figure E)

R5 - 900

.5% 1/4W Res.

(white-blk-blk-blk-green)

(see Figure E)

R4 - 9k

.5% 1/4W Res.

(white-blk-blk-brown-green)

(see Figure E)

R3 - 90k

1/4W .5% Res.

(white-blk-blk-red-green)

(see Figure E)

R2 - 900k

.5% 1/4W Res.

(white-blk-blk-orange-green)

(see Figure E)

R1 - 9M

.5% 1/2W Res.

(white-blk-blk-yellow-green)

(see Figure B)

D1 - 1N4001 Diode
D2 - 1N4001 Diode

(see Figure C)

R12 - 9

1/4W .5% Res.

(white-blk-blk-silver-green)

(see Figure B)

R13 - 1

.5% 1/2W Res.

(brown-black-gold-green)

(see Figure B)

Fuse Holder Clips
Fuse 2A

Mount holders with the tab
side as shown on the top
legend then insert fuse.

-14-

ASSEMBLE THE  FOLLOWING  COMPONENTS TO THE  PC  BOARD

In all of the following steps 

the components must be installed on the top legend side of the PC board. The

board is turned to solder the component leads on the selector switch side

.

Figure E

Stand resistor on end as
shown with the body
inside the white circle.

White
Circle

R26 - 8.2k

5% 1/4W Res.

(gray-red-red-gold)

(see Figure E)

R25 - 39.2k

1% 1/4W Res.

(orange-white-red-red-brown)

(see Figure E)

C1 - 22

µ

F Lytic Capacitor

(see Figure F)

R27 - 2k

1% 1/4W Res.

(red-blk-blk-brown-brown)

(see Figure E)

R28 - 1.3k

1% 1/4W Res.

(brn-orange-blk-brn-brn)

(see Figure E)

R46 - 5.6k

5% 1/4W Res.

(green-blue-red-gold)

(see Figure E)

VR1 - 200

Potentiometer

Shunt

+

C1

+

Tab

Push into board

up to stops

Solder the spring to the PC board as shown in
Figure Ja.

See Figure K for the following steps.

Peel off the protective backing on the top plates
(A) and (B) and stick them to the top case. Peel
off the protective backing on the battery cushion
and stick it onto the bottom case.

(These may be

installed on the case already)

.

Turn the selector knob screw one full turn out as
shown in the figure.

Place the PC board on a standard piece of paper
(8 1/2” x 11”). Insert the two springs into the
holes on the range selector knob. Put grease on

top of the springs and then place a ball bearing
on each spring. Press the top case onto the PC
board.

Using both hands, slide your fingers

under the paper. Press your thumbs down on the
top case and then flip the board. Be sure to hold
the PC board to the case firmly or the ball
bearings will fall out. Fasten the PC board to the
top case with three M2.3 x 6 screws in the places
shown in Figure J.

Connect the battery and place it in the cavity of
the top case.

Place the bottom case onto the top case. Hold
the two sections together with two M3 x 12
screws.

-21-

FINAL ASSEMBLY

Spring

Pad

Screw Holes

Figure J

Figure Ja

Solder

Spring

Summary of Contents for M-2665K

Page 1: ...ttp www elenco com e mail elenco elenco com DIGITAL MULTIMETER KIT MODEL M 2665K WIDE RANGE DIGITAL MULTIMETER WITH CAPACITANCE AND TRANSISTOR TESTING FEATURES Assembly and Instruction Manual Elenco E...

Page 2: ...xperience in soldering and wiring technique you should have no problems For the beginner care must be given to identifying the proper components and in good soldering habits Above all take your time a...

Page 3: ...scharge as fixed rate slope When the charge is equal to the initial starting point autozero level the read period is ended Since the discharge slope is fixed during the read period the time required i...

Page 4: ...is CAUTION sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly adhered to could result in damage to or destruction of part or all of the instrument This...

Page 5: ...ck 3 Set the range selector knob to the position 4 If the semiconductor junction being measured is connected to the circuit turn off the power to the circuit being tested and discharge all of the capa...

Page 6: ...leads to the device or circuit being measured 5 Turn on the power to the device or circuit being measured The voltage value will appear on the digital display along with the voltage polarity 6 Turn o...

Page 7: ...es 2 Avoid any excessive accumulation of resin build up whenever you solder a connection 3 Take your time assembling the circuit board Work at a slow pace Remember that accuracy is far more important...

Page 8: ...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 s...

Page 9: ...0 1 2 3 4 5 8 9 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 10 F 16V 103K 100V The letter M indicates a tolerance...

Page 10: ...crew 1 2 turn Slip the two shims under the knob see Figure L If they do not slip in turn back the screw another 1 4 turn Tighten the screw just enough so that the shims can be pulled out You should no...

Page 11: ...0000 1 PC Board 516000A 1 Solder Roll 551135 1 Battery Snap BAT 590098 1 Battery 590009 1 LCD Window Plate 621002A 1 Range Selector Knob 622003 1 Bushing 624004 Qty Description Part 1 LCD Stopper 6290...

Page 12: ...N5232 Diode see Figure C BAT Battery Snap Insert both wires through the hole and mount the red wire to the hole and the black wire to the hole Solder the wires from the top legend side Notch Notch 24...

Page 13: ...Range Selector Knob LCD Window Plate NOTE If the range selector switch becomes hard to turn then loosen the M2 3 x 8 screw slightly 23 Testing Procedure SECTION C AC voltage and current circuit Measu...

Page 14: ...R1 9M 5 1 2W white black black yellow green 179051 1 VR1 200 220 Potentiometer 191320 Note Some resistors may not have a color coding but they will have the value imprinted on them Note Resistor toler...

Page 15: ...es orange white red red brown see Figure E C1 22 F Lytic Capacitor see Figure F R27 2k 1 1 4W Res red blk blk brown brown see Figure E R28 1 3k 1 1 4W Res brn orange blk brn brn see Figure E R46 5 6k...

Page 16: ...of 1 10 amps If the tests are not working check for cold solder joints and part values Turn the meter off and remove the battery and test leads DO NOT PROCEED TO SECTION C WITHOUT YOUR INSTRUCTOR S AP...

Page 17: ...der the socket to the PC board Insert the IC into the socket with the notch as shown below Socket Notch C8 Figure I Mount the capacitor with the negative lead in the negative hole and the positive lea...

Page 18: ...own brown brown 141930 1 R40 4 12k 1 1 4W yellow brown red brown brown 144130 1 R9 9k 1 1 4W white black black brown brown 149030 1 R38 10k 1 1 4W brown black black red brown 151030 1 R43 11k 1 1 4W b...

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