Use a multimeter to check the power cord for any broken wires. Replace if it is
found that the customer has used tape to cover frayed insulation.
Check the magnet coil for broken wire leads. Use an ohmmeter to measure the
resistance of the magnet coil. If the coil resistance is zero (open), replace it.
Check the yellow capacitor using an ohmmeter. Check for broken leads. If
power is applied to the unit, and it makes a knocking sound (from the armature
bottom spring making contact with the spool core), but there is no output, the
capacitor is bad. Replace it if any of these conditions are present.
Use an ohmmeter to check the resonator coil. If no resistance, check for broken
lead wires, or replace the resonator coil. If the unit is powered, and arcing is
observed inside the resonator coil, replace it. If the unit works Okay, but has a
weak output, the resonator coil is defective. Replace the resonator coil if any of
these conditions are present.
The Model BD-10AS has a microswitch to turn power on and off to the resonator.
Check the switch for broken wire leads. If leads are Okay, test the switch for
continuity with a multimeter. Replace if bad.
If the unit is working, but the output is reduced, check the resonator coil, the
capacitor, and the contacts.
Assembly Instructions:
For the Model BD-10AS, make sure the microswitch aligns with the pushbutton.
Install the plastic housing, 10-32 nut, and screws to the proper position.
To avoid a potential shock hazard, cover the screws with wax as before.
Install the adjusting knob on the adjusting screw. Turn the knob clockwise until
the unit turns on. Turn the knob clockwise until it shuts off. Back up the knob
until the unit turns on again. Remove power from the unit and install the plastic
or fiber washers into the space between the plastic housing and the adjusting
knob. Tighten the knob securely.
The unit should sound smooth when turned on. If the adjusting knob is turned
too far into the unit, a loud vibration will be heard, the output will be high. If left in
this position, the internal parts will begin to burn up. Back off the knob to the
position which has a smooth sound.
If the contacts were replaced, the number of adjusting washers may vary with
what was used before contact replacement. If the contacts were not replaced,
the same number of adjusting washers can be used.
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