Buick Motor 980650 Schematic

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Product Information:
Model:980650
Manufacturer:Buick Motor (United Motors Service)

Schematics Content:

Please note: this content is a computer-generated interpretation of the above schematic and is provided only to help assist you in locating this schematic. For the actual text, please consult the schematic above. Thank you.

Page 1:

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BUICK MOTOR

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Page 2:

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Page 4:

PAGE 13-4 BUICK

`0112621121" ALIGNMENT

BUICK MOTOR

Should realignment be necessary, the circuits can be properly adjusted
only by the use of a calibrated test oscillator or signal generator and an

output meter.

Aligning I-F Stages at 260 Kilocycles

Connect the ground lead of the signal generator to the chassis.
Connect the Signal lead of the signal generator to the R.F. section
of the gang condenser (Illus. F, Fig. 5) through a .l mfd. condenser.
Connect the output meter from the plate prong of one 6V66T tube

to the plate prong of the other 6V66T tube.

Set the signal generator to 260 Kilocycles and turn volume control

Set the condenser gang to a point around 600 Kilocycles where no
station is received.

Adjust the four screws on the two I.F. coils (Illus. A,B,C & D,
Figs. 5 & 4) until maximum output is obtained. Repeat these
adjustments with as low an output from the signal generator as
possible for a readable indication on the output meter.

Aligning at 1560 Kilocycles

Leave the signal generator connected as before.

Turn the tuning condenser plates all the way out and against the

high frequency stop.

(c) Set the signal generator to 1560 Kilocycles.

(d) Adjust the trimmer (Illus. E, Fig. 5) for maximum output.
Aligning at 1400 Kilocyclee

Connect the signal lead of the signal generator to the antenna

connection of the receiver through a .00005 mfd. mica condenser.

Set the signal generator to 1400 Kilocyclee.

Rotate the variable plates of the gang condenser until the signal

is tuned for maximum output,

Adjust the trimmers (Illus. F, G, Fig. 5) for maximum output.

Aligning at 600 Kilocycles

Leave the signal generator connected as before.

Set the signal generator to 600 Kilocycles.

Tune this signal in on the set.

Adjust the oscillator coil iron core aligning screw (Illus. H,
Fig. 5) while rocking the condenser gang back and forth through
the signal until maximum output is obtained.

Adjust screw (Illus. J, Fig. 4) for maximum output.

Repeat adjustments made under 5 and 4 above.

Adjustment of Radio to Car Antenna '

The radio should be adjusted to the car antenna after mounting in the

car. The following adjustment should be made:

(a) Tune in a weak station near the high frequency end of the dial

(b) Adjust the antenna trimmer (Illus. G, Fig. 5) for maximum output.

(C)John F. Rider

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