assembly manual
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TRANSCRIPT
Assembly Manual
Mike Fortney
04/02/2006
CricketSat LC Receiver
Index• Parts List
• Circuit Board Assembly
• Testing
• Troubleshooting
Parts List Speaker 6” black antenna wire 1” black jumper wire Green printed circuit board 9-Volt battery snap connector Power switch RF receiver module LM386 IC chip 8-pin DIP socket 5-Volt regulator (black 3-pin
device) Red LED
Protection diode (1N4001) Audio jack connector Three small yellow 0.1uF
capacitors Blue cylindrical 47uF capacitor Volume control potentiometer 10 ohm resistor, brown-black-
black-gold 680 ohm resistor, blue-gray-
brown-gold 180K ohm resistor, brown-
gray-yellow-gold
Circuit Board Assembly (1 of 7)
White band
D1, 1N4001 diode (polarized)
R2, 680 Ohm (blue-gray-brown)
R3, 180 kOhm (brown-gray-yellow)
R5, 10 Ohm (brown-black-black)
C3, 0.1 uF capacitor
C4, 0.1 uF capacitor
C5, 0.1 uF capacitor
Circuit Board Assembly (2 of 7)
Masking tape may help
SW1, switch
8-pin socket for U3
R4, volume potentiometer
D2, red LED (polarized)
J1 audio jack
J2 speaker 2-pin header
Notch end up Longer lead is positive (+)
Circuit Board Assembly (3 of 7)
U1, 5-V regulator
U2, RF receiver module
U3, LM386 amplifier
C1, 47 uF capacitor (polarized)
C2, 47 uF capacitor (polarized)
C6, 47 uF capacitor (polarized)
Notch end of U3 up
White bands
up
Flat edge of
U1 down
White band on C6 to the right
Circuit Board Assembly (4 of 7)
9-Volt battery snap connector (POLARIZED)
Solder wires on top of
board
Snip off excess wire
Route through strain relief holes
Red lead to B+ Black lead to B-
Circuit Board Assembly (5 of 7)
Black 6-inch antenna wire
Solder antenna wire on top of board. Trim excess wire.
Circuit Board Assembly (6 of 7)
Black 1-inch jumper wire
Solder wire on top side of circuit board. Trim excess wire.
Solder wire to this lead of R3 on this side of circuit board.
Circuit Board Assembly (7 of 7)
Attach battery
Attach speaker to J2 (non-polarized)
Assembly is complete!
Testing• Slide power switch to “ON” position.
• The red LED should light and change brightness with according to signal strength.
• If the LED does not light, TURN OFF IMMEDIATELY and proceed to the next slide “Troubleshooting”
• Turn the volume control to a mid position and you should hear a hiss from the speaker.
• Test the unit with a CricketSat. You should hear a tone or clicking sound up to 1000 feet away.
Troubleshooting
• No sound or lights, no smoke– Try a new battery
– Insure that slide switch is working properly
– Check if battery leads correctly attached to board, red +, black -
– Check if D1 diode is properly installed, white band -
– Check if amplifier IC and RF receiver modules installed properly
• No sound, but lights– Turn volume control to a median setting. Should hear hissing
sound
• Does not receive CricketSat tone or pulses– Receiver module may be faulty or need re-tuning
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