Cadillac 60 Series 1963 Shop Manual page 350

ELECTRICAL SYSTEM 12-69
DIAGNOSIS OF MINOR RADIO TROUBLES
CONDITION
Dead
Weak
Intermittent
Noisy
Poor Tone
POSSIBLE CAUSE
Blown fuse.
Antenna open or shorted.
Poor ground.
Poor solder connection.
Selector tube shorted
(AM radios only).
Defective transistor.
Antenna not extended.
Antenna trimmer not adjusted.
Antenna open or shorted.
Poor antenna connection.
Poor solder connection.
Poor ground.
Low battery.
Loose antenna connection.
Intermittent shorting of Selec-
tor tube (AM radios only).
Intermittent solder connection.
Local interference.
Station signal weak.
Antenna open or shorted.
Static noise.
Spark noise.
Installation defects.
Regulator noise.
Low battery.
Antenna not extended.
Poor antenna connection.
Wire against speaker cone.
Rattling speaker cone.
Rubbing voice coil.
REMEDY
Check fuse. See Note 84a.
Check antenna. See Note 84d.
Check all ground connections.
Inspect connections.
Replace tube. See Note 82f.
Test transistor.
Extend antenna.
Adjust trimmer. See Note 83a.
Check antenna. See Note 84d.
Clean and tighten connections.
Inspect connections..
Check all ground connections.
Charge battery.
Tighten connections.
Replace tube. See Note 84f.
Tap printed circuit board with
insulated tool.
Explain to owner.
Explain to owner.
Check antenna. See Note 82d.
Identify type of noise. Replace
defective static collectors. See
Note 80a.
Check i g n i t i o n wires and
ground straps. See Note 82b.
Check installation.
Check regulator and generator
condensers. See Note 82c.
Charge battery.
Extend antenna.
Tighten antenna connections.
Reroute wire away from cone.
Replace speaker.
Replace speaker.