display CHEVROLET TRAIL BLAZER 2002 1.G Service Manual

3-27
Adjusting the Speakers (Balance/Fade)
To adjust the balance, press and release the P
-TYPE
LIST AUDIO control until BAL appears on the display.
Turn the control clockwise to move the sound to the
right speakers and counterclockwise to move the sound
to the left speakers.
The middle position balances the sound between the
speakers. To set the balance to the middle position, press
the P
-TYPE LIST AUDIO control briefly, then press it
again and hold it until the radio emits one beep. The
balance will be set to the middle position and the display
will show the speaker balance.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
To adjust the fade, press and release the P
-TYPE LIST
AUDIO control until FADE appears on the display. Turn
the control clockwise to move the sound to the front
speakers and counterclockwise to move the sound to the
rear speakers.The middle position balances the sound between the
speakers. To set the fade to the middle position, press
the P
-TYPE LIST AUDIO control briefly, then press
it again and hold it until the radio emits one beep. The
fade will be set to the middle position and the display
will show the speaker balance.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
Using RDS
Your audio system is equipped with a Radio Data
System (RDS). RDS is a system that sends data along
with the audio of the FM station you are currently tuned
to. You can use RDS to display program information
and to control your radio. With RDS your radio can do
the following:

Seek only to stations with the types of programs you
want to listen to,

seek to stations with traffic announcements,

receive announcements concerning local and
national emergencies, and

receive and display messages from radio stations.

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RDS features are only available on FM stations which
broadcast RDS information. The RDS features of your
radio rely on receiving specific RDS information from
these stations. These features will only work when the
RDS information is available. In rare cases, a radio
station may broadcast incorrect information that will
cause the radio features to work improperly. If this
happens, please contact the radio station.
When you are tuned to an RDS station, the station name
will appear on the display, instead of the frequency.
Most RDS stations provide their station name, the time
of day and a Program Type (PTY) for their current
programming. Some stations also provide the name of
the current program.
TUNE DISP: Press this control to change what appears
on the display while using RDS. Pressing this control
will also display an RDS station frequency or program
type when the radio is on. The display options are
station name, station frequency, PTY and the name of
the program (if available). Pressing and holding this
control will activate the RDS default display.Accessing RDS
To access RDS stations perform the following steps:
1. Push the SEEK TYPE button or turn the P
-TYPE
LIST AUDIO control to display the program
type list.
2. Turn the control either clockwise or
counterclockwise to select a program type. The list
is alphabetical. If you select ANY TYPE your radio
will seek to the first PTY available.
3. Push the SEEK TYPE button to activate search.
VOL PWR: Turn this control clockwise to increase
volume when RDS interrupts regular play. Turn it
counterclockwise to decrease volume.
P
-TYPE LIST AUDIO: Turn this control clockwise
or counterclockwise to select the Program Type (PTY)
you want to listen to. TYPE and a PTY will appear on
the display. Press the SEEK TYPE button and the radio
will seek to the first RDS broadcaster of the selected
program type. If the radio cannot find the desired
program type, NONE will appear on the display and the
radio will return to the last station you were listening to.

3-29
AM FM: The AM FM button operates the alternate
frequency feature. This feature allows the radio to
switch automatically to a stronger station with the same
programming. Alternate frequency is off by default from
the factory. Press and hold AM FM for two seconds to
turn alternate frequency on or off. AF ON or AF OFF
will appear on the display and the radio will beep once.
The radio will not switch automatically to other stations
when alternate frequency is off.
SEEK TYPE: Press this button to go to a station with
the last selected PTY; TYPE and the last selected PTY
will appear on the display, if it is not already showing.
Press SEEK TYPE a second time to seek. If a station
with the selected PTY is not found, the radio will return
to the original station and display NONE.
RDS Radio Announcements
(Alert): Alert warns of national or local emergencies.
You will not be able to turn off alert announcements.
ALERT! appears on the display when an alert
announcement plays. When an alert announcement
comes on the tuned radio station, you will hear it, even
if the volume is muted or a cassette tape or compact disc
is playing. If the cassette tape or compact disc player is
playing, play will stop for the announcement and resume
when the announcement is finished.This function will only work during actual emergency
broadcasts, and will not work during tests of the
emergency broadcast system. This feature is not
supported by all RDS stations.
INFO: If the current station has a message, the INFO
icon will appear on the display. These text messages are
from the RDS broadcaster to the listening public and
may be general information such as artist and song title,
call in phone numbers, etc. Press this button to see the
message. If the whole message does not appear on the
display, parts of the message will appear every three
seconds until the message is completed. To scroll
through the message at your own speed, press the INFO
button again for less than one second. A new group of
words will appear on the display. Once the complete
message has been displayed, the INFO icon will
disappear from the display until another new message is
received. The old message can be displayed by pressing
the INFO button until a new message is received or a
different station is tuned to.
TRAF: Press this button to receive traffic
announcements. If the current tuned station does not
broadcast traffic announcements, the radio will seek to
a station that does. The TRAF icon will flash on the
display. When the radio finds a station that broadcasts
traffic announcements, it will stop. If no station is found,
NO TRAF will appear on the display.

3-30
Your radio can be programmed to interrupt the playback
of a cassette tape, CD or FM radio by enabling the
traffic interrupt feature. Press the TRAF button once to
seek to an RDS station that supports the traffic interrupt
feature if the current tuned station does not. The TRAF
icon will flash on the display when seeking for a station
that supports traffic interrupt. When the traffic interrupt
feature is on, TRAF will appear on the display.
When a traffic announcement comes on the tuned radio
station, you will hear it, even if the volume is muted or a
cassette tape or compact disc is playing. The TRAF icon
and TRAFFIC will appear on the display while the
traffic announcement plays. If the cassette tape or
compact disc player was being used, the tape or compact
disc will stay in the player and resume play at the point
where it stopped.
Playing a Compact Disc
Insert a disc partway into the slot, label side up. The
player will pull it in and the disc should begin playing.
The display will show the CD symbol. If you want to
insert a compact disc with the ignition off, first press
TUNE DISP or EJT.
If an error appears on the display, see ªRadio/Compact
Disc Messagesº later in this section.1 PREV: Press this button or the left SEEK PSCAN
arrow to go to the previous track if the current selection
has been playing for less than eight seconds. If the
1 PREV button or the left SEEK PSCAN arrow is
pressed and the current selection has been playing for
more than eight seconds, it will go to the beginning of
the current selection. TRACK and the track number will
appear on the display. If you hold the 1 PREV button
or left SEEK PSCAN arrow or press it more than once,
the player will continue moving back through the disc.
The sound will mute while seeking.
2 NEXT: Press this button or the right SEEK PSCAN
arrow to go to the next track. TRACK and the track
number will appear on the display. If you hold the
2 NEXT button or the right SEEK PSCAN arrow
or press it more than once, the player will continue
moving forward through the disc. The sound will mute
while seeking.
3 REV: Press and hold this button to reverse quickly
within a track. Press and hold this button for less than
two seconds to reverse at six times the normal playing
speed. Press and hold it for more than two seconds to
reverse at 17 times the normal playing speed. Release it
to play the passage. The display will show ET and the
elapsed time.

3-31
4 FWD: Press and hold this button to advance quickly
within a track. Press and hold this button for less than
two seconds to advance at six times the normal playing
speed. Press and hold it for more than two seconds to
advance at 17 times the normal playing speed. Release it
to play the passage. The display will show ET and the
elapsed time.
6 RDM: Press this button to hear the tracks in random,
rather than sequential, order. RDM ON will appear on
the display. RDM T and the track number will appear on
the display when each track starts to play. Press 6 RDM
again to turn off random play. RDM OFF will appear on
the display.
 SEEK PSCAN
: Press the left SEEK PSCAN
arrow to go to the start of the current or previous track.
Press the right SEEK PSCAN arrow to go to the start of
the next track. If either of the SEEK PSCAN arrows is
held or pressed more then once, the player will continue
moving backward or forward through the CD.TUNE DISP: Press this control to see how long the
current track has been playing. ET and the elapsed time
will appear on the display. To change what is normally
shown on the display (track or elapsed time), press the
control until you see the display you want, then hold
the control for two seconds. The radio will produce
one beep.
AM FM: Press this button to play the radio when
a disc is in the player. The disc will stop but remain in
the player.
CD AUX: With a CD in the player and the radio
playing, press this button to play a CD. Press AM FM
to return to the radio when a CD is playing. The inactive
CD will remain safely inside the radio for
future listening.
EJT: Press this button to remove the disc. The
radio will play. Eject may be activated with either the
ignition or radio off. CDs may be loaded with the radio
and ignition off if this button is pressed first.

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Radio/Compact Disc Messages
(CAL ERR): This message is displayed when the radio
has not been calibrated properly for the vehicle. You
must return to the dealership for service.
(LOCKED): This message is displayed when the
THEFTLOCK
 system has locked up. You must
return to the dealership for service.
(Err): If you're driving on a very rough road or if it's
very hot, the disc may not play and Err (error) may
appear on the display. When the road becomes
smooth or the temperature returns to normal, the disc
should play. If the disc comes out, it could be one of
the following:

The disc is upside down.

It is dirty, scratched or wet.

It is very humid. (If so, wait about an hour and
try again.)
If any error occurs repeatedly or if an error can't be
corrected, please contact your dealer.
AM-FM Stereo with Cassette Tape and
Compact Disc Player with Radio Data
System (RDS) and Automatic Tone Control
(If Equipped)
Standard Radio--Bose not shown
Playing the Radio
VOL PWR: Press this control to turn the system on and
off. Turn this control clockwise to increase volume.
Turn it counterclockwise to decrease volume.

3-33
AUTO VOL: Your system has a feature called
Speed
-Compensated Volume (SCV). With SCV, your
audio system adjusts automatically to make up for road
and wind noise as you drive.
Set the volume at the desired level. Press AUTO VOL
to adjust the SCV. AVOL will appear on the display.
Each time you press AUTO VOL, another volume
setting (LOW, MEDIUM, HIGH or OFF) will appear on
the display. The volume level should always sound the
same to you as you drive. Each volume setting allows
for more volume compensation at faster vehicle speeds.
NONE will appear on the display if the radio cannot
determine the vehicle speed. If you don't want to use
SCV, select OFF.
If your vehicle has the Bose radio, your audio system
monitors the noise inside your vehicle. Then, automatic
volume automatically adjusts the volume of your radio
so that it always sounds the same to you. To use
automatic volume, press the AUTO VOL button until
AVOL ON appears on the display. To turn the automatic
volume off, press the AUTO VOL button until AVOL
OFF appears on the display.Finding a Station
AM FM: Press this button to switch between AM, FM1
and FM2. The display will show your selection.
TUNE DISP: Turn this control to choose radio stations.
Pressing this control will also display an RDS station
frequency or program type when the radio is on.
Pressing this control when the ignition is off will display
the clock.
 SEEK PSCAN
: To seek, press the right arrow to
tune to the next station and the left arrow to tune to the
previous station and stay there.
To scan your preset stations, press and hold one of the
arrows for more than two seconds. The radio will
produce one beep. Use preset scan to listen to each of
your favorite stations stored on your pushbuttons for a
few seconds. The radio will scan through each of the
stations stored on your pushbuttons, except those
stations with weak reception. Press one of the arrows or
one of the pushbuttons again to stop scanning. SCAN
will be displayed whenever the tuner is in the preset
scan mode. The channel number (P1 through P6) will
appear with the frequency. In FM mode, this function
will scan through the current band such as FM1 or FM2.

3-34
Setting Preset Stations
The six numbered pushbuttons let you return to
your favorite stations. You can set up to 18 stations
(six AM, six FM1 and six FM2) by performing the
following steps:
1. Turn the radio on.
2. Press AM FM to select the band.
3. Tune in the desired station.
4. Press AUTO TONE to choose the bass and treble
equalization that best suits the type of station you
are listening to.
5. Press and hold one of the six numbered pushbuttons.
The radio will produce one beep. Whenever you
press that numbered pushbutton, the station you set
will return and the bass and treble equalization that
you selected will also be automatically selected for
that pushbutton.
6. Repeat the steps for each pushbutton.Setting the Tone (Bass/Treble)
P
-TYPE LIST AUDIO: To adjust the bass, press and
release the P
-TYPE LIST AUDIO control until BASS
appears on the display. Then turn the control clockwise
to increase bass and counterclockwise to decrease bass.
The display will show the bass level.
To set the bass to the middle position, press and hold the
P
-TYPE LIST AUDIO control. The radio will produce
one beep and set the display level to the middle position.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
To adjust the treble, press and release the P
-TYPE LIST
AUDIO control until TREB appears on the display.
Turn the control clockwise to increase treble and
counterclockwise to decrease treble. The display will
show the treble level. If a station is weak or noisy, you
may want to decrease the treble.
To set treble to the middle position, press and hold
P
-TYPE LIST AUDIO control. The radio will produce
one beep and set the display level to the middle position.

3-35
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
When you use this control, the radio's AUTO TONE
setting will return to manual.
AUTO TONE: This feature allows you to choose preset
bass and treble equalization settings designed for rock,
news, pop, jazz, classical and country stations.
Each time you press the AUTO TONE button, this
feature will change to one of the preset equalization
settings previously listed.
To return the bass and treble to the manual mode, press
and release the P
-TYPE LIST AUDIO control. See
ªSetting Preset Stationsº listed previously to program
the auto tone feature.
If your vehicle has the Bose radio, your audio system
allows you to choose from four different equalization
settings: talk, driver, normal and spatial. These settings
can be used while listening to the radio, the cassette tape
or CD player.Press the AUTO TONE button to scroll through your
choices. Select TALK when listening to non
-musical
material such as news, talk shows, sports broadcasts and
books on tape. This setting makes spoken words sound
very clear. Select DRIVER to give the driver the best
possible sound qualities. Select NORMAL to enhance
the stereo effect. Select SPATIAL to make the listening
space seem larger. When NORMAL is displayed, the
system will provide the best overall Bose performance.
The radio saves separate AUTO TONE settings for each
preset and source.
Adjusting the Speakers (Balance/Fade)
To adjust the balance, press and release the P
-TYPE
LIST AUDIO control until BAL appears on the display.
Turn the control clockwise to move the sound to the
right speakers and counterclockwise to move the sound
to the left speakers.
The middle position balances the sound between the
speakers. To set the balance to the middle position, press
the P
-TYPE LIST AUDIO control briefly, then press it
again and hold it until the radio emits one beep. The
balance will be set to the middle position and the display
will show the speaker balance.

3-36
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
To adjust the fade, press and release the P
-TYPE LIST
AUDIO control until FADE appears on the display.
Turn the control clockwise to move the sound to the
front speakers and counterclockwise to move the sound
to the rear speakers.
The middle position balances the sound between the
speakers. To set the fade to the middle position, press
the P
-TYPE LIST AUDIO control briefly, then press
it again and hold it until the radio emits one beep. The
fade will be set to the middle position and the display
will show the speaker balance.
To set all tone and speaker controls to the middle
position, press and hold the P
-TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.Using RDS
Your audio system is equipped with a Radio Data
System (RDS). RDS is a system that sends data along
with the audio of the FM station you are currently tuned
to. You can use RDS to display program information
and to control your radio. With RDS, the radio can do
the following:

Seek only to stations with the types of programs you
want to listen to,

seek to stations with traffic announcements,

receive announcements concerning local and
national emergencies, and

receive and display messages from radio stations.
RDS features are only available on FM stations that
broadcast RDS information. The RDS features of your
radio rely on receiving specific RDS information from
these stations. These features will only work when the
RDS information is available. In rare cases, a radio
station may broadcast incorrect information that will
cause the radio features to work improperly. If this
happens, please contact the radio station.