Elenco Radio Controlled Car Soldering - Manual (Page 25)

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Driving Motor Tests
Solder the yellow wire from the driving motor AND
one of the wires from the light bulb to the Q6-Q8
junction on the PCB. BE CAREFUL TO AVOID ALSO
TOUCHING NEARBY PADS..
Solder the green wire from the driving motor AND
the other wire from the light bulb to the Q5-Q7
junction on the PCB. BE CAREFUL TO AVOID ALSO
TOUCHING NEARBY PADS.
Elevate the rear of the car so that the rear wheels may
spin freely. Make sure they won’t catch on any of your
wires. Activate the transmitter for forwards/backwards
and make sure the wheels spin properly. Note: Try to
also press down on the forward part of the rear cover
while doing this, since the forward screws for it have
not been installed yet.
Check that the light bulb is on whenever the rear
wheels spin.
Remeasure the voltages at the Q6-Q8 and Q5-Q7
junctions on the PCB now that they are loaded by the
driving motor:
Q6-Q8 (loaded) Q5-Q7 (loaded)
TX: forward 0.3 ± 0.3 V 5 ± 1.2 V
TX: backward 5 ± 1.2 V 0.3 ± 0.3 V
If you don’t get these voltages or the wheels don’t spin
properly then check your steering circuit. You should
also redo the motor quick test in assembly step 6.
Turn the ON/OFF switches to off.
Green wire from
driving motor
Yellow wire from
driving motor
Light
Bulb
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