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Troubleshooting - Elenco Electronics AM-780K Assembly And Instruction Manual

Am radio kit

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ALIGNMENT
Using a small, slotted screwdriver, adjust the
trimmer located on the back of the tuning
Turn the power OFF. Put a fresh 9V battery into
the battery holder and turn the power ON. Adjust
the volume to a comfortable level. Tune the dial
(around 1000kHz) until a weak station is heard.
Carefully slide the antenna coil on its ferrite core
until the station is at its loudest.
Figure K

TROUBLESHOOTING

Contact Elenco
®
Electronics if you have any problems. DO NOT contact your place of purchase as they will not
be able to help you.
1. One of the most frequently occurring problems is
poor solder connections.
a) Tug slightly on all parts to make sure that
they are indeed soldered.
b) All solder connections should be shiny.
Resolder any that are not.
c) Solder should flow into a smooth puddle
rather than a round ball.
connection that has formed into a ball.
3 Leads
Location for min. capacitance
Figure J
Resolder any
-8-
capacitor to minimum capacitance (as shown in
Figure J).
4 Leads
Use the paper left over from the Radio Dial Label
used in Figure G and fold it in half as shown in
Figure K. Fold it in half once more as shown.
Now you have a shim to hold the coil in place.
Slide the shim, in-between the coil and the ferrite
core as shown in Figure L.
Shim
Figure L
d) Have any solder bridges formed? A solder
bridge may occur if you accidentally touch
an adjacent foil by using too much solder or
by dragging the soldering iron across
adjacent foils. Break the bridge with your
soldering iron.
2. Use a fresh 9V battery.

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