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

Page: 54 / 166

54
WhitakerAudio
– Install R64, R68, R84, R98, R101 – 2.2 k
Ω
, 0.5 W . Solder in place.
– Install R65 – 47
Ω
, 0.5 W . Solder in place.
– Install R71, R104 – 1 m
Ω
potentiometer, trimmer . Solder in place. Using a small
screwdriver, set the device to the approximate center of travel.
– Install R73, R76, R90 – 1 k
Ω
, 0.5 W . Solder in place.
– Install R74, R82 – 47 k
Ω
, 0.5 W . Solder in place.
– Install R75, R81 – 1.5 k
Ω
, 0.5 W . Solder in place.
– Install R77, R78 – 6.8 k
Ω
, 0.5 W . Solder in place.
– Find R86, R99, R102 – 10 k
Ω
, 2 W potentiometer, chassis mount . Set these components
aside for now. They will be installed on the chassis.
– Install R89 – 15 k
Ω
, 0.5 W . Solder in place.
– Install R91 – 220 k
Ω
, 0.5 W . Solder in place.
– Install R94 – 8.2 k
Ω
, 0.5 W . Solder in place.
– Install R105 – 8.2 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above the
PWB.
– Install R106 – 1 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above the
board.
– Install R107 – 10 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above the
board.
– Install R108 – 2.2 k
Ω
, 2 W . Solder in place, providing about 1/4-inch clearance above the
board.
– Install R109, R110, R111, R112 – 100 k
Ω
, 2 W . Solder in place, providing about 1/4-inch
clearance above the board.
Clean the soldering iron tip.
– Find C51 – 10 pf, 500 V disc . Set this component aside; it may be used in conjunction
with transformer T51. The space for C51 on the PWB is not used.