Pontiac Fiero 1988 Service Manual page 1244

RADIO SYSTEMS AND ANTENNAS 9A 1
SECTION 9A
RADIO SYSTEMS AND ANTENNAS
CONTENTS
General Description
9A-1
Radio 9A-1
Antennas 9A-
Fixed Antenna 9A-
Diagnosis
9A-
Radlo 9A-
Static and Noise 9A-
Popping Noise 9A-1
Preliminary Diagnostics 9A-1
Antenna 9A-2
Tape Player 9A-2
S e r v i c e Procedures
9A-3
Radio and Speakers 9A-3
Radio Noise Suppression Equipment 9A-3
Stereo Cassette Tape Player .......................... 9A-3
Tape & Tape Player Care 9A-3
Radio Operation
9A-4
ETR AM/FM Stereo (UM-7) 9A-4
ETR Stereo Cassette
(UM-6) 9A-5
ETR Stereo/Cassette/Equalizer
(UX-1) 9A-6
On-Car S e r v i c e (Illustrated)
9A-7
Sub-Woofer, Amp. & Wiring 9A-8
Sub-Woofer Switch & Wiring 9A-9
Front Speaker & Grille 9A-9
Rear Speaker Wiring 9A-9
Radio Mounting 9A-10
Radio Wiring
9 A - 1 0
Amplifier Mounting 9A-10
Dome/Reading Lamp & Sub-Woofer
Harness 9A-11
GENERAL DESCRIPTION
R A D I O
For radios and radio use see the "Radio
Operation" section. ETR means 'Electronically Tuned
Receiver'.
ANTENNAS
Fixed Antenna
The fixed antenna on the right front fender
cannot be adjusted up or down. It may provide
improved reception in rural areas.
The fixed antenna is designed to withstand most
car washes without damage. If the antenna becomes
slightly bent, you can straighten it by hand. The
antenna can be replaced if severely bent (by vandalism,
etc.). Antennas must be kept clean for good
performance.
DIAGNOSIS
R A D I O
Because radio problems are normally repaired at
authorized warranty repair stations, the tendency is to
remove the set when a problem is reported, without any
preliminary diagnosis. This results in a large number
of radios being "No Trouble Found" units when
received by the warranty repair stations. Often the
trouble can be corrected without radio removal.
ETR radios require clock and button reset if the
battery is disconnected.
Static and Noise
Ground strap connections must be clean and
tight, spark plug cables must be TVRS type and in
good condition and resistance-type spark plugs used.
Capacitors are used in the generator, heating/air
conditioning system, and fuse panel to reduce noise
entering the radio through the feed wires. If the car has
a heater only, the capacitor is in the blower motor feed
wire. If equipped with A/C, the blower motor has a
built-in capacitor. Extra electrical equipment added to
the static if not properly grounded or wiring was
improperly routed.
Weak FM station reception will be affected by
nearby buildings, car speed and direction. These
"flutter" and "fading" conditions are characteristic of
weak FM signals.
Popping Noise
Operating devices such as turn signals, pushing in
cigarette lighter, operating stop lights, etc., may cause
a popping noise on distant (weak) AM signals.
Preliminary Diagnostics
The inconvenience of driving without a radio
while the set is being serviced can often be avoided if
the following quick checks are used to eliminate
external radio system problems before removing the
radio for repair: