1988 PONTIAC FIERO CD player

RADIO SYSTEMS AND ANTENNAS 9A-1
SECTION 9A
0 SYSTEMS AND ANTENNAS
CONTENTS
............................................. General Description .................................... 9A-1 Radio Operation 9A-4
Radio
............................................................ 9A-1 ETR AM/FM Stereo (UM-7) ....................... 9A-4
Antennas
........................................................ 9A- 1 ETR Stereo Cassette (UM-6) ......................... 9A-5
Fixed Antenna
.......................................... 9A- 1 ETR Stereo/Cassette/Eaualizer
Diagnosis ........................................................
Radio ....................... .. ................................
Static and Noise .................................... .....
........................................ Popping Noise
Preliminary Diagnostics
.............................
Antenna ................................. .. ................
Tape Player .................. .... .......................
Service Procedures ....................................
Radio and Speakers ........................... .............
Radio Noise Suppression Equipment ............
Stereo Cassette Tape Player ..........................
Tape & Tape Player Care ........................
(UX-1) ..................................................... 9A-6
Advanced ETR
Stereo/Cassette/Equalizer Touch
Control
.................................... ... .............. 9A-7
On-Car Service .............................................. 9A-9
Radio Receiver
............................................ 9A-9
Radio Steering Wheel Controls
..................... 9A-9
Audio Amplifier
........................................... 9A-9
Radio Suppression
..................................... 9A-9
Front Speaker
................................................. 9A-9
............... Rear Speaker; Sub Woofer Speaker
9A-9
Antenna
..................... .. ............................. 9A- 10
GENERAL DESCRIPUION
RADIO ANTENNAS
For radios and radio use see the "Radio Fixed Antenna
Operation" section. ETR means 'Electronically Tuned The
fixed antenna on the right front fender
Receiver'. 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.
RADIO
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. 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.
ETR radios require clock and button reset if the
battery is disconnected.
Popping Noise
Static and Noise Operating devices such as turn signals, pushing in
cigarette lighter, operating stop lights, etc., may cause
Ground strap connections must be clean and
a popping noise on distant (weak) AM signals.
tight, spark plug cables must be TVRS type and in
good condition and resistance-type spark plugs used.
Preliminary Diagnostics
Capacitors are used in the generator, heating/air
conditioning system, and fuse panel to reduce noise
The inconvenience of driving without a radio
entering the radio through the feed wires. If the car has
while the set is being serviced can often be avoided if
a heater only, the capacitor is in the blower motor feed
the following quick checks are used to eliminate

9A-2 RADlO SYSTEMS - AND ANTENNAS
external radio system problems before removing the
radio for repair:
1. Turn ignition to the accessory position and turn
radio on.
2. On AM-FM radios, if the radio is dead on FM
but the AM plays normally, the radio should be
removed for repair. (The reverse of this condition
does not necessarily call for radio removal).
3. On combination radio/tape units, if the radio
operates properly but the tape player does not,
the unit should be removed for repair. (The
reverse of this condition does not necessarily call
for
radio/tape removal.)
Always determine the exact nature of the radio
problem as an aid to diagnosis. Knowing whether
the condition is intermittent or constant, whether
it occurs with engine
offor running, and whether
it occurs with car parked or moving will help to
pinpoint the problem.
Radio diagnostic information is in Section
8A.
FIXED ANTENNA
Testing For Good Ground of Antenna Mounting
and Connections
Poor grounding of the power antenna, either at
the antenna mounting or at any other connection in the
antenna/lead-in system, can result in seriously reduced
radio performance.
A poor ground can be a reason for
excess ignition noise in
AM reception, or erratic audio.
To check for a poor ground of the antenna,
perform the following:
1. Fully lower antenna.
2. Disconnect antenna motor electrical connector.
3. Remove escutcheon from fender.
4. Attach alligator clip to upper end of antenna to
act as antenna. Leave other end of clip
unattached.
5. Tune radio for weak AM station or signal which
is dependent on clip,
i.e., clip attached, station is
present; clip removed, no station.
6. Remove clip.
7. Ground upper end of antenna to fender
(preferably with knife blade, very short jumper
wire, etc.).
8. If radio station is not received, then the antenna
grounds are good. If the station is still present or
stronger, a poor ground or no ground connection
is present in the system.
Possible ground loss points are:
s Antenna upper mounting (screws loose,
paint overspray, etc.)
e coaxial connector at antenna not tight or
corroded. (Remove to inspect inside the
connector for corrosion.)
e Coaxial connector at radio not tight or
corroded.
e Quick connect connector corroded.
Checking Antennas
Unplug antenna lead-in at back of radio and plug
a test antenna into radio. Make sure test antenna base
is grounded to the car chassis and keep hands off of the
CASSEmE TAPE PLAYER DIAGNOSIS
1. INSPECT I& CLEAN
CAPSTAN
AND HEAD . TRY A KNOWN 600
ADVISE CUSTOMER
TAPE IS WORN QR DEFECTIVE
Fig. 1 Tape Player Diagnosis

RADIO SYSTEMS AND ANTENNAS 9A-3
antenna. Check radio reception in an area away from
reception. If reception is OK, problem exists with
electrical interferences. These include tall buildings,
antenna and/or its lead-in cable. If reception is still
metal structures, power lines, fluorescent lighting, and
poor, refer to Section
8A.
power tools. Tune to high and low ends of the dial on
both AM and FM checking weak and strong station
reception. If reception is OK, problem exists with
antenna and/or its lead-in cable. If reception is still
poor, refer to Section
8A.
Checking Lead-In Cables
Figure 2
Usually symptons of broken center conductor of
the lead-in cable will result in no AM and weak FM.
In case of continued reception or noise complaints,
always check the lead-in with an ohmmeter. The chart
and diagram shown in Figure
2 show readings which
should be obtained. When checking resistance,
cautiously wiggle the lead-in tip and cable. If the
readings shown in Figure
2 are not obtained, some
portion of the lead-in is intermittent and the lead-in
should be replaced.
CHECKING FIXED ANTENNAS
Unplug antenna lead-in at back of radio and plug
a test antenna into radio. Make sure test antenna base
is grounded to the car chassis and keep hands off of the
antenna (see "Testing for Good Grounds"). Check
radio reception in an area away from electrical
interferences. These include tall buildings, metal
structures, power lines, fluorescent lighting, and power
tools. Tune to high and low ends of the dial on both
AM and FM checking weak and strong station
less than 0.5'
less than 0.5
'On some long lengths
of lead-ins, such as power antennas,
capacitance is added in the tip. This results in a resistance
reading of approximately 100,000 ohms.
Fig. 2 Lead-In Cable Diagnosis
SERVICE PROCEDURES
RADIO AND SPEAKERS
STEREO CASSETTE TAPE PLAYER
NOTICE: All radios are the bridge audio type,
using two wires to each speaker. It is very
important when changing speakers or performing
any radio work to avoid pinching the wires. A
short circuit to ground from either wire will cause
damage to the output circuit in the radio.
Also, all Delco sound systems have ungrounded
speakers. Installing add-on tape players, CB
radios or other units which use the car speakers
may damage your Delco sound system. Please
consult your dealer in advance if you are
considering additions.
See On-Car Service for radio or front speaker
replacement. See Body Service Manual at end of
this manual for door or rear speaker replacement. Figure 4
Tape and Tape Player Care
Optimum performance can be maintained by
cleaning the internal tape head, capstan, and pinch
roller periodically (approx. each 100 hours of
operation). This can be done by inserting a nonabrasive
cleaning cassette in place of the music tape.
DO NOT USE silicone spray lubricants for
switch, plunger or tape head lubrication.
NO LUBRICANTS should be used since they
cause the player to operate improperly, especially
at extreme temperatures.
Do not bring any magnetized tools near the tape
head. If the head becomes magnetized, every
cassette played will be degraded.
Store cassettes away from extreme heat or direct
RADIO NOISE SUPPRESSION EQUIPMENT sunlight. Protect the open ends from dirt or damage;
store them in their original cases or other protective
Figure 3 cases. For best results, 120 minute tapes are not
recommended.
When installing a new radio, or when noise is a
When leaving the car, cassettes may be left in the
problem, ensure that radio suppression equipment is
tape player (tapes are either automatically ejected or
present and properly installed.
internally protected).

98-4 RADIO SYSTEMS AND ANTENNAS
USE NON-ABRASIVE
CLEANER. FOLLOW
DIRECTIONS
IN PACKAGE.
Fig. 4 Cleaning the Cassette Player
RADIO OPERATION
ETR AM-FM STEREO (UM-7)
Figure (30 1
ETW AM-FM Stereo Radio Operation
listening to the radio with ignition on or to
display time of day with ignition off.
e Balance Control (located behind upper knob)
- turn to adjust left/right speaker balance.
@ Power Button ("PWR) - Press to turn radio e Lower Knob - rotate knob to tune radio stations
on. Press again to turn radio off.
manually. Frequency will be displayed during
Upper Knob - rotate knob to control volume. tuning. Press knob to select AM or FM band
Press knob to recall station frequency when
alternately.

9A-6 RADIO SYSTEMS AND ANTENNAS
Press the SEEK button to locate and retain the
next listenable station on the band automatically.
The FM stereo indicator will light when tuned to
an FM station broadcasting in stereo. Stereo
(dual stereo) sound is more realistic.
a Time Set
To set hour, press SET button. The SET indicator
light on the dial will then light up and the radio
frequency will be displayed. Then press SCAN
button, holding SCAN button in until the correct
hour appears.
To set minutes, press SET button. The SET
indicator light will then light up and the radio
frequency will be displayed. Then press SEEK
button, holding SEEK button in until correct
minute appears.
NOTE: After you press the SET button, the radio
frequency will be displayed. The time of day will
be displayed when you press the SCAN or SEEK
button.
a To Operate Tape Player
Insert the cassette squarely into tape door, with
exposed edge entering first. Tape will snap into
position when fully inserted. This automatically
switches the unit from radio to tape operation.
After the cassette has snapped into position,
adjust the volume and fader controls to your
preference.
To advance tape rapidly, press the button next to
the lighted arrow (arrow on button points in the
same direction as lighted arrow). To reverse tape
and located an earlier selection, press the button
which has an arrow pointing in the opposite
direction. To stop fast motion and return to
playing speed, press STOP-EJECT lightly; press
again, but more firmly to eject the tape.
Reversing Sides - Press the upper left
knob (volume control) to play the other
side of the tape. When the end
sf tape is
reached, it automatically reverses and
plays the other side. Tape
indicator Light
When the left indicator light is lit, the top side of
the tape is playing. When the right indicator light
is lit, the bottom side of the tape is playing.
NOTE: When end-of-tape is reached in one
direction, the unit will automatically play the
other side of the tape.
To remove the tape or listen to the radio, push the
STOP-EJECT button.
Press the Dynamic Noise Reduction
(BNRO)
button to reduce high frequency background hiss
on AM, FM, FM stereo, and tape.
For best results, 120 minute tapes are not
recommended.
Figure 803
ETR AM Stereo-FM Stereo Radio Operation
a Povver Button ("PWR") - press to turn radio
on. Press again to turn radio off.
Fig. 803 UX1 Radio
Upper Knob - rotate knob to control volume.
Press knob to recall station frequency when
listening to the radio with the ignition on, or to
display time of day with ignition off. Press knob
to select the other side of the tape when the
cassette is playing.
Loudness Button ("LOUD") - Press to boost
bass frequencies when the system is playing at
low volume.
Balance Control (located behind upper knob)
- turn to adjust left/right speaker balance.
Lower Knob - rotate knob to tune radio stations
manually. Frequency will be displayed during
tuning. Press knob to select AM or FM band
alternately.
Front/Wear Speaker Control (located
behind lower knob)
- rotate control to adjust the
sound between the front and rear speakers.
AM Stereo ("AM-ST") - press to receive AM
stereo.
" Stereo" indicator light will be displayed
when tuned to a station broadcasting
C-QUAM@ AM stereo, provided it is being
received with adequate signal strength in your
locality. When the button is
"out", all AM
stations will be received in monaural,
"single-channel" sound.
C-QuamO is a registered trademark of Motorola,
Inc.
FM Stereo
The stereo indicator light will be displayed
whenever tuned to an FM station broadcasting in
stereo. Stereo (dual channel) sound is more
realistic.
"Stereo" operation means the radio is separating
a stereo broadcast back into the original two
channel, called
"left" and "right."Stereo sound is
noticably realistic to the ear.
5-Band Graphic Equalizer - allows you to
adjust bass, midrange, and treble to suit personal
taste. Move control up to increase frequency
range or down to decrease frequency range.
NOTE: 60 and 250 denote bass; 1K denotes
midrange;
3.5K and 10K denote treble.
Generally, the
Ik control is placed in the center
(detent) position, while the bass and treble
controls are adjusted upwards to varying degrees
Since the
10K control has the most influence on
treble, it may produce high frequency hiss when

RADIO SVSEEMS AND ANTENNAS 9A-7
fully up. If this occurs, move it down until the
hiss disappears.
This radio has automatic Dynamic Noise
Reduction
(DNRB) to reduce high frequency
background hiss on AM, FM,
AM Stereo, FM
Stereo, and tape.
e Station Preset Buttons
The radio has four pushbuttons for presetting
favorite stations:
1. Select
the desired band (AM or
FM), and
tune to the desired station.
2. Press SET button. Within five secorads press
one of the four station buttons.
The radio will tune in the selected station
whenever you press that station button.
NOTE: Up to three additional stations on
each band may be preset by "pairing" the
pushbuttons:
1. Tune in the desired station;
2. press SET, and within five seconds press
any two
adjacant pushbuttons at the same
time. (The station will return when the two
buttons are pressed again.)
CB Seek and Scan
Use the SEEM and SCAN buttons for automatic
station tuning.
Press SCAN button to sample each station being
received automatically. To stop SCAN, press
SCAN button again.
The SCAN indicator light on the frequency dial
will be lit during SCAN operation.
Press the SEEK button to locate and retain the
next listenable station on the band automatically.
The
FM stereo indicator will light when tuned to
an
FM station broadcasting in stereo. Stereo
(dual channel) sound is more realistic.
o Time Set
To set hour, press SET button. The SET indicator
light on the dial will then light up. Then press
SCAN button, holding SCAN button in until
correct hour appears.
To set minutes, press SET button. The SET
indicator light will then light up. Then press
SEEK button, holding SEEK button in until
correct minute appears.
NOTE: After you press the SET button, the radio
frequency will be displayed. The time of day will
be displayed when you press the SCAN or SEEK
button.
e To Operate Tape Player:
Insert the cassette squarely through the door.
This automatically switches the unit from radio
to tape operation. If the sound is garbled (or there
is no sound), eject the tape and reinsert it
squarely.
To advance the tape, press the forward ("FWD")
button. To listen to the earlier portion of the tape,
press the reverse ("REV") button. To stop
forward or reverse movement, press the opposite
button lightly.
To listen to the next selection, slide the
"SEARCH" button to the right and press the forward
("FWD") button. The radio will seek the
next selection.
To listen to the previous selection again, slide the
"SEARCH" button to the right and press the
reverse ("REV") button. The radio will repeat
the previous selection.
The "ON" light, to the right of the search switch,
will be on while the search function is engaged.
When the left triangle indicator light is lit, the top
side of the tape is playing. When the right triangle
indicator light is lit, the bottom side of the tape
is playing.
To play the other side of the tape before the
present side has ended, press the upper left knob.
This will automatically play the opposite side of
the tape.
NOTE: When end-of-tape is reached in one
direction, the unit will automatically play the
other side of the tape. To remove the tape or listen
to the radio, push the EJECT button.
When the ignition is turned off, the tape is
automatically ejected.
The equalization setting which is desired will
vary according to the type of tape being used.
Chrome
(CrO,) and metal tapes usually have 70
usec equalization, while standard (iron) tapes
have
120 usec equalization. The tape bias is often
indicated on the cassette label or case.
Select the setting for proper tape equalization as
follows:
1. Select 70
usec (push button in).
2. Select 120 usec (button is out).
ADVANCED ETR TOUCH CONTROL
STEWEO/CASSETYE/EQUALIZER (hl"P-4)
Figure 804 and 806
NOTE: This innovative radio has remote
controls conveniently mounted in the center of the
steering wheel. Major functions of station selection,
volume, and
front/rear speaker control can be made at
the radio receiver (located in the instrument panel), or
at the steering wheel controls.
e Graphic Display and Lighting
This advance ETR has many conveniences. The
graphic display (upper left corner) provides
useful information about time, station frequency,

RADIO SYSTEMS AND ANTENNAS 9A.9
This radio cannot be used on cars without
steering wheel controls. When removed from the
car and reinstalled, the radio will be dead and
LOC will appear on the graphic display. Press
MUTE on the steering wheel to reactivate the
radio.
To Operate the Tape Player:
(NOTE: The following controls are located on
the receiver.)
inserting f ape
Insert cassette into door marked AUTO
REVERSE, so exposed edge of tape enters first.
This turns tape player on and disables the radio.
Tape Bias
When the "CrO" button is lighted, it is set for
chrome or metal tapes; press and the light will go
out (for normal bias tapes).
Reversing Sides
Press program button PROG to play other side
of tape. When end of tape is reached, it
automatically reverses direction and plays the
other side.
NOTE: When lighted arrow located below tape
door points "up," selections listed on the top side of
the tape are being played; when arrow points
"down,"the bottom side is being heard.
Fast Forward
Press FWD button to activate; press PROG to
return to playing speed.
Fast Reverse
Press REV button to activate; press PROG to
return to playing speed.
Music Search
Press SEEK to automatically find the next
selection. Press REPT to repeat the selection
being played.
To Eject Tape
Press EJECT.
NOTE: Power button must be "on." Tape ejects
and radio becomes operative. (It is not nesessary
to eject tapes when leaving car, since internal
pressure is automatically released when ignition
is turned "off.")
For best results,
120 minute tapes are not
recommended.
"Receives
C-QUAMO AM stereo broadcasts.
Most AM stereo stations across the country broadcast
in
C-QUAMO, but some do not. Check with your
local station for compatibility in your area.
C-QUAMO is a Registered Trademark of
Motorola, Inc.
ON-GAR SERVICE
RADIO RECEIVER
Figures 606 and 607
Remove or Disconnect
1. Negative battery cable.
2. Radio/AC-Heater console trimplate.
3. Four (4) radio retaining screws.
4. Pull radio straight out.
5. Power, speaker and antenna connectors. Remove
radio.
6. Transfer attaching parts (clips, brackets, etc.) to
new radio if unit is to be replaced.
Install or Connect
To replace, reverse removal procedure.
RADIO STEERING WHEEL CONTROLS
Refer to Section 3B4 for removal procedure.
AUDIO AMPLIFIER
Figure 610
Remove or Disconnect
5. Two (2) harness connectors.
6. Three (3) attaching screws and remove bracket
from amplifier.
Install or Connect
Reverse removal procedure to reinstall.
RADIO SUPPRESSION EQUIPMENT
When installing a new radio, or when noise is a
problem, insure that radio suppression equipment is
present and properly installed.
FRONnSPEAKER
Figure 606
Remove or Disconnect
1. Instrument panel pad (see Section 8C).
2. Four (4) screws holding speaker in instrument
panel carrier.
3. Lift speaker out of instrument panel. Disconnect
wiring.
Install or Connect
1. Negative battery cable. Reverse removal procedure to install.
2. Right side
instrument close out panel.
3. Two (2) amplifier bracket to instrument panel REAR SPEAKER; SUB-WOOFER SPEAKER
screws.
Rear speakers are mounted in the rear quarter
4. Lower audio amplifier and bracket out of trim panel. See Section
2N in the body portion of this
instrument panel. manual for complete details
of replacement.