Antenna Trimmer; Radio Sound System Controls - Jeep 1979 CJ-5 Technical & Service Manual

3V-2 RADIO SOUND SYSTEMS
ANTENNA TRIMMER
Antenna trimmer adjustment is necessary to match
the vehicle radio circuit to the vehicle antenna. The
adjustment should be made after installation of a radio
or antenna, or after repair to a radio. The adjustment
also should be checked whenever radio reception is
unsatisfactory.
Adjuster Location
• A M and AM/FM radio: just above the tuning
control.
• AM/FM stereo with tape player: in the tape car-
tridge slot.
• AM/FM/CB: just left of pushbuttons on face plate.
Trimmer Adjustment
The trimmer adjustment should be made when the
radio is tuned to a very weak station. It is not necessary
to be able to receive an understandable station. The
object is to obtain the greatest volume while the volume
control is at a medium setting.
(1) Switch radio to the AM broadcast band.
(2) Turn on radio and allow to warm up for several
seconds.
(3) Turn station control knob to 1400 KC range and
obtain a radio station signal. Turn to medium volume.
(4) On AM and AM/FM radios, remove inner and
outer station tuning control knobs (radios without tape
player). On AM/FM/Tape radios, open tape door. On
AM/FM/CB radio the AM adjustment is on the face of
the radio. The CB adjustment procedure is found in the
Tuning Antenna Splitter section.
(5) Engage small slotted screw head with standard
screwdriver.
(6) Turn screw left or right until the greatest vol-
ume can be obtained without touching the volume
control.
(7) Install inner and outer tuning control knobs, if
removed.
CONTROLS
The radio has external fader and balance controls (fig.
3V-2). An indicator light will come on whenever the
radio is receiving a stereo signal.
BASS
M A N U A L
STATION
T U N I N G
V O L U M E
PUSHBUTTON
STATION
T U N I N G
80202
Fig. SV-1 A I Radio Controls
V O L U M F
OFF
P U L L FOR B A L A N C E
LEFT R I G H T
Y E L L O W STEREO
INDICATOR L I G H T
M A N U A L
STATION
T U N I N G
TREBLE
PI Jeep
88 Hi 92 196^1001 1041 108
O D
TONE
PUSHBUTTON
STATION
T U N I N G
FRONT REAR
FADER
PROGRAM
SLIDE SWITCH ^ A M
PROGRAM
INDICATORS
8 0 2 0 3
Fig. 3V-2 A M / F M / Stereo Radio Controls
AM Radio
The AM radio (fig. 3V-1) has one dash-mounted
speaker as standard equipment. The dial bulb is c o n -
trolled by the on-off switch; therefore, the bulb has no
brilliance control.
AM/FM Multiple! Radio
All Cherokee and Wagoneer models have optional
four-speaker systems, one speaker in each front door
with rear speakers mounted in the rear trim panels.
AM/FM Multiple! Tape Radio
The AM/FM multiplex radio has a built-in, 8-track
stereo tape player (fig. 3V-3). AM or FM program selec-
tion is made by moving the slide switch (located on the
right of the dial face) up or down for the desired pro-
gramming. Left to right balance has been preset for
equal balance and should not require any adjustment.
However, should it become necessary to adjust for left-
to-right balance, the balance control is located in the
tape cartridge slot and is adjustable with a small stand-
ard screwdriver (fig. 3V-4).