GMC 1975 Motorhome Operating Manual page 30

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Heating system output can be varied by
moving temperature lever and "FAN" lever
to different positions .
With the lever in "DEF" position, system op-
erates the same as in the "HEATER" position
except most of the air flow will be through
the defroster outlets at the windshield.
"RECIRC," "COLD," "HOT" -This lever,
used in conjunction with the system selector
lever ("OFF," "A/C," "VENT," "HEATER,"
"DEF") and the "FAN" switch lever, will
control the temperature of the output air
being distributed .
CAUTION
Operate
in "DEF" po5ilion
for 30
sec-
onds before switching
I* "A/C ." This
will
remove humid
air
from the system
and minimize rapid fogging of the glass
which can occur if humid air is blown
onto a
cool
windshield_
Clear windshield, rear window, outside mir-
rors, and all side windows of ice and snow
before driving vehicle.
Operate blower on "HI" for a few seconds
before moving the vehicle, to clear the air
intake of snow.
RADIOS AND TAPE DECK
PUSH BUTTON "AM" RADIO
The "ON-OFF" switch is on the left-hand
center knob with the volume control . The left-
hand outside knob varies the tone response of
the receiver. The right-hand center knob is used
to select the station desired . The right-hand
outside knob adjusts the volume of front and
rear speakers.
24
ANTENNA
AM-FM
Stereo
Radio
with Tape
Deck
(Tape Removed)
In addition to the manual controls, this radio
provides five push buttons with which to auto-
matically select pre-set stations. To pre-set, pull
the push button "out" as far as it will go, tune
in the desired station manually, and then push
the button "in."
Repeat this operation for each push button.
AM-FM RADIO
In addition to providing standard AM recep-
tion, this set permits you to receive clear static-
free FM broadcasts. Move the slide bar, above
the push buttons to the right or left to select
AM or FM reception . All other controls remain
the same as described for push button radios.
FM broadcasts may be received as far as 25
miles from the sending station, depending on the
power of the station and the existing terrain . In
fringe areas, it may be possible to retune the
radio slightly to maintain peak reception. If
not, retune to a closer or stronger FM station
or switch to AM operation. Push buttons may
be set for both AM or FM stations as follows :
Place slide bar in AM position.
Pull push button out as far as it will go, tune
in desired AM station manually and then
push button in to LOCK-IN position.
Repeat for each remaining push button .
Place slide bar in FM position and repeat
procedures outlined for AM band setting.
IMPORTANT:
Bands should not be changed if
push button is unlocked or radio may be
damaged.
The radio antenna is mounted on top of the
vehicle. If necessary, adjustments for maximum
antenna effectiveness on AM can be made by
your authorized GMC MotorHome dealer .

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