Elenco Electronics AM-550TK Instruction Manual download pdf (Page 18)

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ASSEMBLY INSTRUCTIONS - DETECTOR

STATIC MEASUREMENTS

C6 - 100μF Lytic

(see Figure B)

R5 - 27kΩ Resistor

(red-violet-orange-gold)

T1 - IF Coil (yellow)

TP3 - Test Point Pin

(see Figure A)

C4 - 10μF Lytic

(see Figure B)

R11 - 3.3kΩ Resistor

(orange-orange-red-gold)

C9 - .02μF or .022μF Discap

(marked 203 or 223)

R12 - 2.2kΩ Resistor

(red-red-red-gold)

R8 - 100Ω Resistor

(brown-black-brown-gold)

T3 - IF Coil (black)

TP5 - Test Point Pin

(see Figure A)

D1 - 1N4148 Diode

(see Figure E)

C15 - .001μF Discap

(marked 102)

C10 - .01μF Discap

(marked 103)

Figure 12

Amps COM V/Ω

GND

R15

With the power turned OFF, connect the VOM to test

point three (TP3) as shown in Figure 12.

Check that the VOM is adjusted to read 9 volts DC and

turn the power ON. The voltmeter should read

approximately 1.5 volts DC. If your reading varies more

than .5 volts from this value, turn the power OFF and

check the polarity of D1, and resistors R11 and R5.

Also check that transformer T1 is properly installed.

AGC ZERO SIGNAL BIAS

With the power turned OFF, connect the positive lead of

the VOM to TP5 and the negative lead to any ground.

Make sure that the VOM is set to read 9 volts DC and

turn the power ON. The voltage on the VOM should be

the same as your battery voltage or power supply

voltage. If not, turn OFF the power and check that T3

is properly installed.

T3 TEST

If you do not have an RF generator, go to Section 3.

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Elenco Electronics AM-550TK Instruction Manual Page 18

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