Radio Sound Systems; Setting The Pushbuttons; Radio Polarity - Jeep 1979 CJ-5 Technical & Service Manual

3V-1
TEMS
IIIII
SECTION INDEX
Pile Page
Antenna 3V-11 Radio Reception Characteristics 3V-4
Antenna Trimmer
3V-2 Radio Replacement 3V-9
Bull Replacement
3V-10
Speaker Harness Test
3V-13
CB Radio Diagnosis
3V-9
Speaker Replacement
3V-13
CB Radios 3V-3 Speakers 3V-12
Controls
3V-2
Specifications
3V-13
Genera!
3V-1 Tools 3V-13
Radio Interference Oiaposis
3V-6
Tuning CB Antenna/Splitterbox
3V-11
GENERAL'
All Jeep radios are transistorized with pushbutton
tuning and have an output impedance of 3.2 ohms. They
operate with the ignition switch in the On or Accessory
positions. All models use non-adjustable, whip-style an-
tennas. Antennas used with CB radios are slighly longer
than those used with other radios.
The AM or FM stations may be preselected, using the
five pushbuttons, or manually tuned. On all radios, the
left-hand knob controls power (on and off) and volume.
The right-hand knob controls station selection. All ra-
dios also have adjustment for the bass and treble tone
quality.
AM/FM, and AM/FM/CB Stereo radios are available
on all Cherokee, Wagoneer and Truck models.
AM/FM radios have a slide switch to select AM or FM
reception and controls for left-right, front-rear speaker
balance. During stereo reception, a small indicator
glows. The light is off during FM monaural reception.
Cherokee and Wagoneer models use four speakers with
the stereo radio. A speaker is mounted in each front door
and rear quarter trim panel. A front-to-rear speaker
fader control is used with the 4-speaker system. It is
located behind the manual station tuning knob. Truck
models use a 2-speaker system with the stereo radio. A
speaker is mounted in each front door.
In addition to the above features, all Citizen Band
(CB) radios have a switch to change from broadcast
band radio listening into the CB receive or transmit
mode.
CAUTION: Do not operate the CB radio with the an-
tenna disconnected. Radio damage can result.
The radio manufactured date, model and serial num-
ber are stamped on the radio case.
Setting the Pushbuttons
To set each pushbutton for automatic tuning, proceed
as follows:
(1) Move vehicle outside building and away from,
high tension lines. |
(2) Permit radio to warm up for several seconds.
(3) Pull pushbutton out about 1/2 inch to unlock
tuner.
(4) Select a station with manual tuning knob.
(5) Push the button in as far as it goes (to lock the
tuner) and then release it. This station is now set for
automatic tuning.
(6) Follow the same procedure for the remaining
buttons.
Radio Polarity
When servicing the radio, the A (power) lead must be
connected to the positive side of the power source. If
connected to the negative side, the radio will not operate
and damage to components will result.
The radio is grounded internally. The ground return
circuit is completed by grounding the radio chassis to
the instrument panel. When testing on the bench, a
ground jumper wire must be attached between the radio
chassis and the negative terminal of a 12-volt battery or
power supply to complete the power circuit.