OWNER'S MANUAL
ACD-21
AM/FM/MPX RADIO
WITH DETACHABLE FRONT PANEL,
COMPACT DISC PLAYER
AND QUARTZ CLOCK
TOLL-FREE INSTALLATION ASSISTANCE
The installation and wiring connections for this unit are so simple, we doubt you'll need our help, but, if you do,
we're here to help you. Just call our toll-free telephone assistance line at 1-800-645-4994 during the days and
hours shown (U.S.A. and Canada only).
TIME ZONE
DAY
PACIFIC
MOUNTAIN
CENTRAL
EASTERN
MON. - FRI.
SATURDAY
8:30AM - 7PM
9AM - 5PM
7:30AM - 6PM
8AM - 4PM
5:30AM - 4PM
6AM - 2PM
6:30AM - 5PM
7AM - 3PM
UNIVERSAL INSTALLATION USING MOUNTING SLEEVE
NUT (5MM)
PERFORATED STRAP
EXISTING DASH OPENING
FILE EDGES TO FIT IF NECESSARY - DO NOT OVERFILE
NOTE: IF DASH IS SOLID, USE REAR SIDE (WITHOUT THE LIP) OF
MOUNTING SLEEVE AS A TEMPLATE & CUT OPENING
FASTEN THIS END TO SCREW
STUD ON REAR OF CHASSIS
BEND TOP
TABS UPWARD
SCREW
(5MM)
BEND BOTTOM
TABS DOWNWARD
RADIO
SCREW STUD
NUT (5MM)
MOUNTING SLEEVE
FASTEN THIS END TO SECURE PART OF DASH-
BOARD. DRILL HOLE IF NECESSARY.
REMOVAL TOOLS
CAUTION:
FOR PROPER OPERATION OF THE CD PLAYER, THE CHASSIS
MUST BE MOUNTED WITHIN 20° OF HORIZONTAL. MAKE
SURE THE UNIT IS MOUNTED WITHIN THIS LIMITATION.
ACHABLE
NT PANEL
20° MAX.
SIDE VIEW
OF
FRONT PANEL
CHASSIS
ISO INSTALLATION
TYPICAL INSTALLATION
REMOVE THE PLASTIC FRAME FROM THE FRONT OF THE CHAS-
SIS BY CAREFULLY UN-SNAPPING IT.
MAXIMUM
SCREW SIZE
M5 x 8
MAXIMUM
SCREW SIZE
M5 x 8
UN-SNAP AT 2 PLACES
EACH ON TOP AND BOTTOM
PLASTIC FRAME
FACTORY MOUNTING
BRACKETS
2
RADIO WIRING
REFER TO PAGE 4 FOR SPEAKER WIRING
AUTOMATIC
ANTENNA
ANTENNA
SE
1.0 AMP FUSE
ERY
10 AMP FUSE
IMPORTANT
THIS WIRE MUST BE
CONNECTEDASSHOWN
OR RADIO WILL NOT
OPERATE PROPERLY
FILTER
BOX
NAL
AN
SO
RE
3
WARNING!
SPEAKER WIRING
l
l
l
l
THE AMPLIFIERS IN THIS RADIO ARE ONLY DESIGNED FOR USE WITH 4 SPEAKERS.
NEVER COMBINE (BRIDGE) OUTPUTS FOR USE WITH 2 SPEAKERS.
NEVER GROUND NEGATIVE SPEAKER LEADS TO CHASSIS GROUND.
FAILURETOWIREEXACTLYASSHOWNBELOWMAYCAUSEELECTRICALDAMAGETO
THE RADIO.
REFER TO PAGE 3
FOR RADIO WIRING
RCA JACKS
LINEOUT
FORUSE
WITH
RADIO
OPTIONAL
EXTERNAL
AMPLIFIERS
RED=RIGHT
REAR
WHITE=LEFT
REAR
4-PIN PLUGS
9-PIN PLUGS
RIGHT FRONT SPEAKER
LEFTFRONTSPEAKER
SEEPAGE3
FORRADIO
WIRING
GRAY w/BLACK STRIPE
GRAY
WHITE w/BLACK STRIPE
WHITE
GREEN
VIOLET
GREEN w/BLACK STRIPE
VIOLET w/BLACK STRIPE
HELP!
1-800-645-4994
Monday - Friday 8:30am - 7:00pm Eastern
Saturday
9:00am - 5:00pm Eastern
LEFT REAR SPEAKER
RIGHT REAR SPEAKER
4
1
PWR BUTTON
in conjunction with the AUDIO SELECT button
3
levels as described in
to adjust the bass, 4treble, balance and fader
,
5
,
6
and
7
.
Press this button to turn the unit on and off.
When the ignition switch is on and the radio
is off, inserting a disc in the player will au-
tomatically turn on the radio, and the disc will
begin playing. When the radio is turned on, the
volume level will start at the level at which it
was set when the unit was turned off.
3
AUDIO SELECT BUTTON (AUDIO SEL)
This button is used to select the audio function
(bass, treble, balance, fade or volume) to be
adjusted using the Volume +/- Level Control
2. Pressing the AUDIO SEL button once will
set the unit for bass adjustment (BAS will ap-
pear on the display panel), treble adjustment
(TRE), balance (BAL), fader (FAD) and volume
(VOL). The display will return to the normal
VOL indication 5 seconds after the last
adjustment or when another function is
activated. All of these functions are symbolized
in bar graph form, in a manner similar to volume.
2
VOLUME +/- LEVEL CONTROL
The volume level (VOL) is always displayed: it
is symbolized by a bar graph across the top of
the display from left to right, up to a maximum
of 10. (Minimum bar display for VOLume is 1.)
To increase the volume level, press the + side
of the button. The volume will increase and the
level will be shown on the display panel from
a minimum of 1 bar to a maximum of 10 bars.
To increase the volume quickly, keep the
button pressed. To decrease the volume level,
press the - side of the button. Keep the button
pressed to decrease the volume quickly. The
display will automatically return to the nor-
mal VOL indication 5 seconds after the last
volume adjustment or when another function
is activated. These controls are also used
4
BASS CONTROL
To adjust the bass level, first select the Bass
mode by pressing the AUDIO SEL button 3until
the BAS indication appears on the display panel.
Within 5 seconds of choosing the Bass mode,
press the + or - buttons of the Volume +/- Level
Control
2
to adjust the bass response as
5
desired. The bass level will be shown on the
display panel from a minimum of -5 bars to a
maximum of +5 bars with respect to center (BAS
= to a single bar represents flat response). The
display will automatically return to the normal in-
dication 5 seconds after the last adjustment or
when another function is activated.
7
FRONT/REAR FADER CONTROL
To adjust the front-rear speaker balance, first
AUDIO SEL button
select the Fader 3mode by pressing the
until the FAD indication
appears on the display panel. Within 5 seconds
of choosing the Fader mode, press the + or the -
buttons of the Volume +/- Level Control
2
to
adjust the front-rear speaker levels as desired.
The FAD position will be shown on the display
panel from minimum of -5 bars (full rear) to a
maximum of + 5 bars (full front) with respect to
center. When the volume level between the
front and rear speakers is equal, a single bar
will be shown on the display panel. The dis-
play will automatically return to the normal in-
dication 5 seconds after the last adjustment
or when another function is activated.
5
TREBLE CONTROL
To adjust the treble level, first select the Treble
mode by pressing the AUDIO SEL button
3
until the TRE indication appears on the
display panel. Within 5 seconds of choos-
ing the Treble mode, press the + or - but-
tons of the Volume +/ - Level Control
2
to
adjust the treble response as desired. The
treble level will be shown on the display panel
from a minimum of TRE = -5 bars to a maxi-
mum of TRE = +5 bars with respect to center
(TRE = to a single bar represents flat re-
sponse). The display will automatically re-
turn to the normal indication 5 seconds after
the last adjustment or when another func-
tion is activated.
8
LOUDNESS CONTOUR (LOU)
When listening to music at low volume levels,
this feature will boost the bass and treble ranges
to compensate for the characteristics of human
hearing. Press the LOU button to activate this
feature as indicated by LOUD on the display
panel. Pressing the button again will de-activate
the function and LOUD will disappear from
the display.
6
LEFT/RIGHT BALANCE CONTROL
To adjust the left-right speaker balance, first
select the Balan3ce mode by pressing the
until the BAL indication ap-
9
AUDIO ATTENUATION (ATT)
AUDIO SEL button
pears on the display panel. Within 5 seconds of
choosing the Balance mode, press the - button
The audio mute function is performed using the
ATT (attenuator) button. This control is used to
mute the volume from the system. When the
ATT button is pressed, the indication ATT
appears on the display panel and the volume
will be muted. Pressing the ATT button again,
or activating the VOL +/- function of the unit,
will return to the volume level setting in use
before the mute function was activated.
of the Volume +/- Level Control
2
to adjust the
stereo balance to the left channel speakers or
the + button of the control to adjust it to the
right channel speakers. The BALposition will be
shown on the display panel from a minimum of
- 5 bars(full left) to a maximum of +5 bars (full
right) with respect to center. When the volume
level between the left and right speakers is
equal, a single bar will be shown on the display
panel. The display will automatically return to
the normal indication 5secondsafter the last ad-
justment or when another function is activated.
bl
TUNER, AM/FM BAND SELECTOR
(TUNER)
During radio play, each time the TUNER button
is pressed, the radio band changes. The
6
band in use. The unit will stop at each pre-set
station for 5 seconds before continuing to the
next pre-set station (the frequency on the
display panel will flash during Pre-Set Scan
operation). Press the button again momen-
tarily to stop Pre-Set Scan operation and re-
main on the selected frequency.
indications AM 1, AM 2, FM 1, FM 2 and FM 3
will appear on the display panel according
to your selection. During FM operation, when the
station is broadcasting in stereo, the stereo icon
appears on the display, together with an ST in-
dication. During AM operation, no indications are
displayed, except the AM band.
Pressing the button for longer than 2 seconds
will activate the Auto-Store Tuning feature. The
radio will automatically scan the band in use and
enter strong stations into the pre-set memory
positions for that band. If you have already
set the pre-set memories of that band to your
favorite stations, activating the Auto-Store
During CD play, pressing this button will
change to radio operation without ejecting the
disc.
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MANUAL UP/DOWN TUNING (
STATION SEEK AND TRACK SELECTION
/
),
Each time the Up Tuning side of the button Tuning feature will erase those stations and
enter the new strong stations. This feature is
most useful when traveling in a new area where
you are not familiar with the local stations.
(
) is pressed, the radio will tune one frequency
step higher. Similarly, each press of the Down
Tuning side of the button ( ) will tune one
frequency step lower. To manually tune in a
station, press the appropriate directional side of
the button until the desired frequency is
reached.
bo
STATION PRE-SET MEMORIES
To set any of the 6 pre-set memory buttons,
use the following procedure:
Pressing and holding either side of the button
for longer than 0.5 second will cause the radio
to continue tuning rapidly in the selected
direction until the button is released, at which
point it will seek the next available station and
stop.
1. Turn the unit on and select the desired band.
2. Select the first station to be pre-set using
the Manual Up/Down or Up/Down Seek
Tuning functions bm.
3. Press the pre-set button to be set and
continue to hold the button in. The pre-set
number will appear on the display panel. The
station is now set into the memory of that
pre-set button and can be re-called at any-
time by momentarily pressing that button.
During CD play operation, momentarily
pressing and releasing either side of the button
will increase or decrease CD track selection in
sequence. Pressing and holding either side of
the button for longer than 0.5 second, will cause
the elapsed time of the current track in play to
increase or decrease accordingly.
4. Repeat the above procedure fortheremaining
5 pre-sets on the band in use and for the
other 4 bands of the unit.
bn
AUTO-STORE TUNING (A/PS)
PRE-SET SCAN TUNING
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LIQUID CRYSTAL DISPLAY PANEL
Press the A/PS button momentarily to scan
the 6 stations in the pre-set memories of the
The Liquid Crystal Display (LCD) panel displays
the frequency, time, and activated functions.
NOTE:It is a characteristic of LCD panels that,
if subjected to cold temperatures for
7
next higher track number will be selected as
shown on the display panel. Similarly , each time
the Backward Track Select ( ) side of the but-
ton is pressed, the next lower track number will
be selected as shown on the display panel.
an extended period of time, they may
take longer to illuminate than under
normal conditions. In addition, the vis-
ibility of the numbers on the LCD may
slightly decrease. The LCD read-out
will return to normal when the tempera-
ture increases to a normal range.
bt
CUE/REVIEW FUNCTIONS (
/
)
During disc play, high-speed audible search to
any section of the disc can be made by the
Cue and Review functions. Press and hold
the Cue side of the button ( ) to advance
rapidly in the forward direction, or the Review
button ( ) to advance rapidly in the backward
direction. During either function, the elapsed
time within each track will automatically be
shown on the display panel.
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DISC SLOT
With the label surface facing up, gently insert
the disc into the slot until the soft-loading
mechanism engages and disc play begins. The
indication and track number will appear
on the display panel.
NOTE: This unit is designed for play of standard
5" (12cm) Compact Discs ONLY. Do
not attempt to use 3" (8cm) CD-Singles
in this unit, either with or without an
adaptor, as damage to the player and/
or disc can occur. Such damage will
not be covered by the Warranty on this
product.
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TRACKREPEATPLAYSELECTOR(RPT)
During disc play, press this button to repeat the
play of the selected track (REPEAT will appear
on the display panel). Play of the track will
continue to repeat until the button is pressed
again and the REPEAT indication disappears
from the display panel. Repeat Play mode will
also be canceled by activating the TUNER
function.
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CD MODE SELECTOR (CD) AND PLAY/
PAUSE (CD/
When listening to radio with a disc loaded in
the unit ( on the display panel), press this
)
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DISC EJECT (
Disc play is stopped, the disc is ejected and
the disc symbol ( ) begins to flash when
)
button to return to disc play mode from the
beginning of the last track in play.
During disc play, press this button to temporarily
stop play of the disc. Disc elapsed time will stop
and flash on the display panel. Press the button
again to resume play from the point at which it
was stopped. Pause mode will also be canceled
by activating any other disc function.
this button is pressed. The unit will then
change to radio operation. Reload the disc if
desired, or remove it from the unit to prevent
damage ( the
symbol will disappear from
the display panel).
cmTIME/FREQUENCYDISPLAYSELECTOR
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TRACK SELECT (
/
)
(T/F)
During disc play, the Track Select functions are
used to quickly access the beginning of a
particular track. Each time the Forward Track
Select ( ) side of the button is pressed, the
A momentary press of the T/F button will call
the time display on the incorporated quartz
clock. The timedisplaywillpersistforapproximately
8
thief that the unit has been disabled by removal
of the front panel.
5 seconds, after which the frequency display will
automatically return, unless the button is pressed
again prior to the 5-second time-out.
cp
RESET BUTTON
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AUXILIARY (AUX IN) JACK
A RESET button is located on the front of the
chassis (front panel must be removed to
access the button). The re-set circuitry is
provided to protect the microprocessor cir-
cuitry and should only be activated under the
following circumstances:
The radio is equipped with an auxiliary audio
input jack which can be interfaced to an exter-
nal audio source. The jack is compatible with
most CD and cassette players or an MP3
digital audio playback unit. When the exter-
nal source is connected, only that audio media
is played by the radio.
1. Upon initial installation after all wiring is
completed.
2. If there is a malfunction of any of the switches
on the unit or the CD player, pressing the
RESET button may clear the system and
return to normal operation.
NOTE: If the external audio jack is used while
the CD player is operational, the
sound from the CD Player will be
muted. However, the CD disc will con-
tinue to spin. We recommend that
when the external audio jack function
is used, either the radio be in the
tuner mode, or the Compact Disc
be ejected from the player.
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FRONT PANEL RELEASE BUTTON
(RELEASE)
This button is used to release the mechanism
that holds the front panel to the chassis. To
detach the front panel, press the button so that
the left side of the panel is released. Grasp the
released side and pull it off of the chassis. To
re-attach the panel, position the right side of
the panel in place first and then press the left
side of the panel until the mechanism locks it
into place.
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THEFT-DETERRENT LED
Located on the chassis behind the front panel,
a light-emitting diode (LED) will flash when
the panel is removed. The flashing light
serves as a visual warning to the would-be
9
NOTES ON USE OF FRONT PANEL
1. Make sure the front panel is right-side-
up when attaching it to the chassis
as it cannot be attached when up-side
down.
2. Do not press very hard on the front
panel when attaching it to the chassis.
No more than light to moderate pressure
should be needed.
3. When attaching the front panel, make
sure the right side is correctly engaged
before pressing the left side to lock it
into position.
4. When taking the front panel with you,
please use the supplied carrying case
to protect the panel from dirt and
damage.
DETACHING THE FRONT PANEL
Release
button
ATTACHING THE FRONT PANEL
Engage right
side first
10
SETTING THE CLOCK
1. Switch the vehicle ignition on and turm on the radio (radio frequency or disc
track number will be shown on the display panel).
2. Press and hold the T/F button until the time display begins flashing. Release the
T/F button.
3. Press the Up Tuning button ( ) to adjust the hours and the AM/PM indication, and
the Down Tuning button ( ) to adjust the minutes to the correct time.
4. When the correct time is shown on the display panel, press and release the T/F
button again and the time is displayed steadily; then wait 5 seconds for the display to
return to the normal indication.
11
SPECIFICATIONS
Size:
7" W x 2" H x 6-1/4" D
178 mm x 50 mm x 150 mm
Operating Voltage:
Output Power:
12 volts DC, negative ground
100 watts maximum
(25 watts x 4 channels)
Output Wiring:
Floating-ground type designed for 4 speaker use.
Front and rear channels CANNOT be combined
(bridged) for use with 2 speakers.
RCA low-level outputs (rear channels).
Output Impedance:
Low-Level Output:
Tuning Range:
Compatible with 4-8 ohm speakers.
350 mV.
AM: 520-1,710 kHz. (10 kHz. step)
FM: 87.5-107.9 MHz. (200 kHz. step)
Sensitivity:
AM: 20 uv.
FM: 3.0 uv.
FM Stereo Separation:
CD Frequency Response:
CD Signal/Noise Ratio:
CD Channel Separation:
CD Distortion:
30 dB
5-20,000 Hz. +1 dB
70 dB
60 dB
0.2%
*Specifications are subject to change without notice.
12
CARE AND MAINTENANCE
The radio section of your new sound system does not require any maintenance. We recommend
that you keep this manual for reference on the many features found in this unit as well as how to
set the clock.
The compact disc player section also requires no routine maintenance, but proper understanding
of its use and handling will help you obtain maximum enjoyment of its capabilities. The following
points should be observed:
l When cleaning the interior of the vehicle, do not get water or cleaning fluids on the unit.
l The CD player is a precision instrument and will not operate properly in extreme heat or cold. In
case of such conditions, wait until the interior temperature of the vehicle reaches a normal
temperature before using the player.
l If the temperature inside the player gets too hot, a protective circuit will automatically stop play
of the disc. In this case, allow the unit to cool off before operating the player again.
l Never insert anything other than a 5" (12 cm) compact disc into the player as the mechanism
can be damaged by foreign objects.
l Do not attempt to use 3" (8 cm) CD-Single discs in this unit, either with or without an adaptor,
as damage to the player and/or disc may occur. Such damage will not be covered by the
Warranty on this product.
l When not using the disc player, always remove the compact disc. Do not leave an ejected disc
sitting in the disc slot as this can expose it to sunlight and other causes of damage.
l Do not attempt to open the unit chassis. There are no user serviceable parts or adjustments inside.
l When the vehicle warms up during cold weather or under damp conditions, moisture may
condense on the lens of the disc player. Should this occur, the player will not operate properly
until the moisture has evaporated.
l The unit is designed with a vibration dampening CD mechanism to minimize interruption of disc
play due to normal vibration in a moving vehicle. When driving on very rough roads, however,
occasional sound skips may occur. This will not scratch or damage the disc and normal play
will resume when the rough conditions cease.
HANDLING COMPACT DISCS
Dirt, dust, scratches, and warpage can cause skips in the playback and deterioration of sound
quality. Please follow these guidelines to take care of your compact discs:
l Use only compact discs with the mark
.
l Fingerprints, dust, and dirt should be carefully wiped off the disc’s playing surface (shiny side)
with a soft cloth. Wipe in a straight motion from the inside to the outside of the disc.
l Never use chemicals such as record sprays, household cleaners or thinner to clean compact
discs. Such chemicals can irreparably damage the disc’s surface.
l Discs should be kept in their storage cases when not in use.
l Do not expose discs to direct sunlight, high temperatures or high humidity for extended periods.
l Do not stick paper, tape, or labels on the disc surfaces nor write on them with any type of marker.
13
12 MONTH LIMITED WARRANTY
AUDIOVOX CORPORATION (the Company) warrants to the original retail purchaser of
thisproductthatshouldthisproductoranypartthereof,undernormaluseandconditions,
beprovendefectiveinmaterialorworkmanshipwithin12monthsfromthedateoforiginal
purchase, such defect(s) will be repaired or replaced with new or reconditioned product
(at the Company's option) without charge for parts and repair labor.
To obtain repair or replacement within the terms of this Warranty, the product is to be
delivered withproofofwarrantycoverage(e.g. dated billofsale), specificationofdefect(s),
transportation prepaid, to the warranty center at the address shown below.
ThisWarrantydoesnotextendtotheeliminationofcarstaticormotornoise,tocorrection
of antenna problems, to costs incurred for installation, removal, or reinstallation of the
product, ordamagetotapes, compactdiscs, speakers, accessories, orvehicleelectrical
systems.
This Warranty does not apply to any product or part thereof which, in the opinion of the
Company, has suffered or been damaged through alteration, improper installation,
mishandling, misuse, neglect, accident, or by removal or defacement of the factory serial
number/bar code label(s). THE EXTENT OF THE COMPANY'S LIABILITY UNDER
THIS WARRANTY IS LIMITED TO THE REPAIR OR REPLACEMENT PROVIDED
ABOVE AND, IN NO EVENT, SHALL THE COMPANY'S LIABILITY EXCEED THE
PURCHASE PRICE PAID BY PURCHASER FOR THE PRODUCT.
This Warranty is in lieu of all other express warranties or liabilities. ANY IMPLIED
WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
SHALL BE LIMITED TO THE DURATION OF THIS WRITTEN WARRANTY. ANY
ACTION FOR BREACH OF ANY WARRANTY HEREUNDER INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY MUST BE BROUGHT WITHIN A PERIOD OF 30
MONTHS FROM DATE OF ORIGINAL PURCHASE. IN NO CASE SHALL THE
COMPANY BE LIABLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES
FOR BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED,
WHATSOEVER. No person or representative is authorized to assume for the Company
any liability other than expressed herein in connection with the sale of this product.
Some states do not allow limitations on how long an implied warranty lasts or the
exclusion or limitation of incidental or consequential damage so the above limitations or
exclusions may not apply to you. This Warranty gives you specific legal rights and you
may also have other rights which vary from state to state.
U.S.A.: AUDIOVOX CORPORATION, 150 MARCUS BLVD., HAUPPAUGE, NEW YORK 11788 • 1-800-645-4994
CANADA: CALL 1-800-645-4994 FOR LOCATION OF WARRANTY STATION SERVING YOUR AREA
Form No. 128-4270E
14
© 2000 Audiovox Electronics Corp., Hauppauge, NY 11788
128-5867
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