WhitakerAudio AM/FM Stereo Tuner 2012, Assembly & User Manual

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AM/FM Stereo Tuner
goes to the square pad. Note that the leads of the device will need to be spread slightly
before insertion into the PWB.
– Install D1, D2 – small signal diode . Solder in place. Be certain to observe proper polarity.
Because of the small mass of the diodes, be careful to not use too much heat from the
soldering iron.
Clean the soldering iron tip.
– Install C1, C5, C13, C14, C20, C26 – 0.01
μ
F, 400 V . Solder in place.
– Install C2, C8, C10 – 2.3 pF to 27 pF, 100 V, trimmer . Solder in place. Set each control
to the center of travel.
– Install C4, C19 – 100 pF, 500 V disc . Solder in place.
– Install C6, C11, C12, C15, C16 – 0.0047
μ
F, 600 V . Solder in place.
– Install C7, C24, C27 – 0.047
μ
F, 400 V . Solder in place.
– Install C9, C17, C18 – 47 pF, 400 V disc . Solder in place.
– Install C21 – 150 pF, 500 V disc . Solder in place.
– Install C22, C23 – 2000 pF, 500 V disc . Solder in place.
– Install C25 – 270 pF, 500 V disc . Solder in place.
– Install C28, C29 – 100 µF, 450 V, electrolytic . Solder in place, observing proper polarity.
The positive terminal of the device connects to the square pad on the PWB. This same
convention is used for all other electrolytic capacitors on the board.
– Install C30, C31, C33 – 47 µF, 450 V electrolytic . Solder in place, observing proper
polarity.
– Install C32, C34 – 0.01 µF disc, 1 kV . Solder in place.
– Install C35, C36 – 1,000 µF, 25 V, electrolytic . Solder in place, observing proper
polarity. Note that depending on the particular type of device used for C35 and C36,
spacing of the two components side-by-side may not be possible, given the position and
typical size of C33. If C35 and C36 cannot be placed side-by-side, then install C36 as
normal against the PWB. Next, install C35 so that it rests above C36. Solder in place.