Buick LeSabre 1965 Service Manual page 739

1 1 - 6 RADIO AND ANTENNA
ACCESSORIES
RADIO TROUBLE DIAGNOSIS (Cont'd)
CONDITION
Weak Radio Signal (Cont.)
Radio Noisy.
Brake Light, Turn Signal or
Window Lift Noise.
Static When Driving.
Engine Ignition Noise.
Poor Tone.
Electric A n t e n n a Operates
Improperly.
QUICK CHECK
Tune radio to weak station,
adjust for maximum volume
and remove inner and outer
knobs. Rotate trimmer screw
to check for maximum volume.
Substitute a known good an-
tenna and hold antenna out-
side car.
Check that antenna connections
are tight.
V i s u a l l y inspect s t a t i c
collectors.
Substitute new noise sup-
pressors.
Substitute speaker with known
good speaker.
NOTE: If car is equipped with
a rear speaker, rotate the rear
speaker knob fully clockwise
instead of substituting a test
speaker.
Operate antenna from full up
to full down position and note
that full travel time does not
exceed 12 seconds. If time
exceeds 12 seconds see op-
posite causes.
POSSIBLE CAUSE AND
CORRECTION
Incorrect Radio Trim Adjust-
ment - Trim radio (Refer to
subparagraph 11-4, "a.").
Corroded Antenna Connections
or Defective Antenna - Repair
or replace as required.
Loose Antenna Connections and
Mounting - Tighten.
Defective Antenna Lead - Re-
pair or replace as necessary.
Dirty or Defective Static Col-
lectors - Clean or replace as
required.
Ignition C o i l , Regulator or
Delcotron Noise Suppressors
Loose or Defective - Replace.
Defective Speaker - Replace.
Dirty, Corroded or Bent An-
tenna Sections - Repair as re-
quired and lubricate sections
using light machine oil.
Faulty Wiring, Poor Ground
Connection, or Defective Con-
trol Switch - Repair or replace
components as required.
Defective Tube and Nylon As-
sembly or Defective Antenna
Motor- Disassemble, inspect
and repair antenna (refer to
paragraph 11-3, "d").