Elenco AM/FM Radio Kit - Manual (Page 44)

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STATIC MEASUREMENTS
Figure 38
Figure 37
Connect your VOM to the circuit as shown in Figure 38.
Turn the power ON. The voltage at the emitter of Q6
should be about 0.7 volts. Record the voltage here:
V(Q6) = ________.
Turn the power OFF. If your answer is greater than 2
volts, check R20, R21, R22, R24, Q6 and the battery.
Since the current through resistor R22 is equal to the
current through transistor Q6, calculate the current
through Q6 as follows:
Current (I) = V(Q6) / R22
Your calculated answer should be between 0.0005
amps (0.5 milliamps) and 0.0011 amps (1.1
milliamps).
Current (I) = __________.
Connect your VOM as shown in Figure 37. Switch the
AM/FM switch to the FM position. Set your VOM to
read 9 volts DC. Turn the power ON. The voltage at this point should be between 7 and 9 volts. Turn the
power OFF. If you do not get this reading, check R25,
C24 and the battery voltage.
FM VOLTAGE
TRANSISTOR CURRENT TEST
GND
TP15
Battery
GND
TP15