Optimus 120-2155, 120-2154 User Manual

High-Power In-Dash AM/FM Stereo CD Player
(120-2154/55) Features Faxback Doc. # 48528

This document contains instructions for both Cat. No. 120-2154 and
120-2155 stereos. (You can find the Cat. No. of your model on the top
of the stereo.) 120-2154 has a LOUD button while 120-2155 has an FSM
button. Unless otherwise noted, these are the primary differences
between the two units listed.

Your Optimus High-Power In-Dash AM/FM Stereo CD Player has many practical,
easy-to-use features, and you can install it in almost any vehicle. The
stereo's anti-theft control panel lets you quickly remove it, making the
stereo inoperative. The auto travel programming feature lets you store
strong local stations into a separate travel memory.

Memory tuning, seek and scan tuning, and FM optimizer circuitry all help
make your stereo's operation simple and quick to help you drive safely.

CAUTION: Use common sense. Do not change your stereo's settings in heavy
traffic or during hazardous driving conditions.

CD PLAYER

Audible Search - lets you rapidly play a CD in either direction to locate
a desired section of a track.

Intro Scan - scans and plays the first 10 seconds of each track, so
you can find a specific track.

Shuffle Play - randomly selects and plays tracks from the loaded CD.

Repeat Play - automatically repeats the current track.

AM/FM STEREO TUNER

Band Button - lets you easily select one of the stereo's AM or
FM bands.

Memory Scan Tuning - scans all stations stored in memory, playing for
5 seconds on each.

Memory Tuning - lets you quickly store and tune up to 18 of your
favorite stations (6 AM and 12 FM).

Auto Travel - lets you automatically store the first 6 strong

Programming stations in each band (AM and FM) into a separate
travel memory so you can quickly find local
stations while traveling.

Seek Tuning - searching forward or backward to the next strong
station in the selected band. This makes finding
a station quick and easy.

Digital Synthesized - gives you precise tuning and drift-free reception.
Circuitry

Advanced FM Optimizer - automatically adjusts the tuner's stereo
Circuitry separation and high-frequency response to give you
the best possible sound, regardless of the signal
level.

GENERAL

Electronic Bass, Treble, - let you easily adjust high and low sounds
Fader, and Balance Controls and the balance between the left/right and
front/rear speakers, so you can tailor the
sound to suit your preferences.

Anti-Theft Control Panel - lets you quickly remove and store the
stereo's control panel in the supplied carry
case. This discourages theft because the
stereo cannot operate without the control
panel.

Lighted On/Off Button - makes it easy to turn on your stereo, even
when you drive at night.

Easy to See Liquid - helps you see the display in all lighting
Crystal Display conditions. The 12-2154's display in amber,
and the 12-2155's display is green.

Line-Out Jacks - makes it easy to connect a booster.

Loudness Button - lets you increase the low range of sounds at
(12-2154 only) low volume levels.

Favorite Sound Memories - lets you store current volume, bass, treble,
(FSM) (12-2155 only) balance, and fader settings, then have your
stereo return to those settings by pressing
a single button.

The CD player in this stereo system is made and tested to meet exacting
safety standards. It meets FCC requirements and complies with safety
performance standards of the U.S. Department of Health and Human Service.

WARNINGS: This system employs a laser light beam. Only a qualified
service person should remove the cover or attempt to service
this device, due to possible eye injury.

The use of controls, adjustments, or procedures other than
those specified herein might result in hazardous radiation
exposure.

High-Power In-Dash AM/FM Stereo CD Player
(120-2154/55) Installation Faxback Doc. # 48529

This document contains instructions for both Cat. No. 120-2154 and
120-2155 stereos. (You can find the Cat. No. of your model on the top
of the stereo.) 120-2154 has a LOUD button while 120-2155 has an FSM
button. Unless otherwise noted, these are the primary differences
between the two units listed.

BEFORE YOU BEGIN THE INSTALLATION

Before you install your stereo, read all the instructions in this owner's
manual. You should be able to answer all of these questions about your
vehicle's electrical and sound systems.

Which terminal in my vehicle's fuse box supplies power even when the
ignition is turned off?

Which terminal in my vehicle's fuse box is for accessories?

How do I connect a wire to the fuse box?

Also, be aware that installation in your vehicle might require cutting or
modifying your vehicle.

Place the stereo as close as possible to the selected mounting location.
We recommend that you install the stereo by temporarily connecting it to
ground and power, optional components, and your speakers. Then test the
connections, disconnect the stereo, mount it in your vehicle, and
reconnect it. The instructions in this manual are arranged in this order.

Preparing the Mounting Area

Before you mount the stereo, make sure you have all the necessary
materials. Then confirm that the stereo fits your vehicle's mounting
area. This autosound stereo system is a DIN-E size unit that requires a
2-inch high by 7-1/2-wide by 7-1/4 inch deep (57 x 190 x 186 mm) mounting
area.

Note: If the mounting area is too large, you might be able to mount the
stereo with an in-dash installation kit, available at your local
RadioShack store. Follow the installation kit's instructions to
mount the stereo.

CAUTIONS: Make sure the stereo will not tilt up more than 30 degrees when

it is mounted.

Be sure to avoid obstructions behind the mounting surface.

Routing Speaker Wires

If you install speakers, avoid routing the speaker wires near moving parts
or sharp edges. You can usually route them along the wiring channel
beneath the vehicle's door facings by carefully removing the molding that
holds the carpet in place. After you route the speaker wires, replace the
molding.

Removing the Shipping Screw

The shipping screw helps protect the stereo's CD player from being damaged
during shipment.

Before you mount the stereo, use a Phillips screwdriver to remove the
shipping screw from the top of the stereo.

Note: Save the shipping screw in case you ever want to mail or ship the
stereo. You can secure it to the back of the stereo with a piece
of tape.

MAKING THE CONNECTIONS

The supplied harness with the 14-pin connector includes all the lead wires
you need to connect the stereo to ground, power, some optional components,
and speakers.

IMPORTANT: Do not cut these wires. If you cut any wire, you cannot
obtain a refund or exchange on this product. However, your
local RadioShack store will provide warranty service if you
cut a wire and find the product is defective.

You might need additional wire, depending on your individual
autosound system, to complete the connections. Your local
RadioShack store carries a full line of wire and wire
management accessories.

CAUTIONS: For added safety and to protect your stereo, disconnect the
cable from your vehicle battery's negative (-) terminal before
you begin.

Be sure your speakers can handle 64 Watts of power (16 Watts
per channel). Each speaker must have an impedance of at least

4 Ohms. Your local RadioShack store carries a full line of
speakers.

You must connect the GROUND, +12V TO IGNITION, and +12V TO
BATTERY wires first, then make all other connections as
described in the following sections before you plug the harness
with the 14-pin connector into the stereo. If you do not make
connections in the order shown, damage to the stereo is
possible if any wire connections are made incorrectly.

You must connect a separate wire to each speaker terminal as
described in the following procedure. Do not use a common wire
or chassis ground for any speaker connection.

Note: The wires in the wiring harness have the following colors and
labels.

(Black) - Ground
(Red) - +12V to Ignition
(Yellow) - +12V to Battery
(Blue/White) - AMP Remote Turn on 500 mA MAX
(White) - Front Left Speaker (+)
(White/Black) - Front Left Speaker (-)
(Gray) - Front Right Speaker (+)
(Gray/Black) - Front Right Speaker (-)
(Green) - Rear Left Speaker (+)
(Green/Black) - Rear Left Speaker (-)
(Violet) - Rear Right Speaker (+)
(Violet/Black) - Rear Right Speaker (-)

Using an Adapter Harness

If you are replacing an existing stereo, or if your vehicle has been
factory-wired for autosound components, you might be able to use an
adapter harness to connect the power and speakers. RadioShack stores sell
adapter harnesses for most vehicles.

Follow the directions that come with the adapter harness to temporarily
connect the ground, power, optional components, and speakers. Then go to
"Connecting the Antenna" below.

Connecting Ground, Power, and Optional Components

Follow these steps to connect the harness with the 14-pin connector to
ground, primary and memory backup power, and optional components.

(Black) - Ground
(Red) - + 12V to Ignition
(Yellow) - + 12V to Battery
(Blue/White) - AMP Remote Turn on 500 mA MAX

1. Disconnect the cable from your vehicle's negative (-) battery
terminal.

2. Connect the black ground wire to a chassis ground, such as a metal
screw attached to a metal part of the vehicle's frame. Be sure that
the screw is not insulated from the chassis by a plastic part.

3. Connect the red power wire (with in-line fuse holder) to a point in
your vehicle's fuse block that has power only when you turn the
vehicle's key to either the accessory (ACC) or START position. This
connection turns on the stereo when you turn on the ignition or turn
the key to ACC, and turns off the stereo when you turn off the
ignition. This prevents your vehicle's battery from being drained if
you leave the stereo on when you turn off the ignition.

4. Connect the yellow power/memory wire to your vehicle battery's
positive (+) terminal or to a point in your vehicle's fuse block that
provides a continuous source of 12 volts.

This connection provides power for the stereo's components (such as
the CD player), and continuous power for the stereo's memory when the
ignition is turned off.

5. Connect the blue/white wire to any optional equipment, designed to run
from a switched source, that you want the stereo to turn on and off
(such as a booster or a power antenna).

This wire does not provide power to the components. It simply turns
them on or off. If you do not use this wire, secure it with a wire
tie and do not let it touch metal.

Connecting an Equalizer/Booster

If you are connecting the stereo to a separate equalizer or booster, you
need additional wires (not included).

To increase the total power output from your system, connect the R (right)
and L (left) line output jacks on the back of the stereo and blue/white
wire, if necessary, to the equalizer or booster.

Check the equalizer/booster's owner's manual for directions.

Connecting Two Pairs of Speakers

If you are using both front and rear speakers, follow these steps to
connect the harness with the 14-pin connector to the speakers.

12-2154 Only: Before connecting the speakers, remove the tape that holds
the mounting sleeve in place and slide the sleeve off of
the stereo. Then set 2CH/4CH on the bottom of the stereo
to 4CH.

(White) - Front Left Speaker (+)
(White/Black) - Front Left Speaker (-)
(Gray) - Front Right Speaker (+)
(Gray/Black) - Front Right Speaker (-)
(Green) - Rear Left Speaker (+)
(Green/Black) - Rear Left Speaker (-)
(Violet) - Rear Right Speaker (+)
(Violet/Black) - Rear Right Speaker (-)

1. Connect the gray wire to the right front speaker's positive terminal.
This terminal is usually marked with a plus (+) sign or red mark.

2. Connect the gray/black wire to the right front speaker's negative
terminal. This terminal might be marked with a minus (-) sign or it
might not be marked at all.

3. Connect the white wire to the left front speaker's positive terminal.

4. Connect the white/black wire to the left front speaker's negative
terminal.

5. Connect the violet wire to the right rear speaker's positive terminal.

6. Connect the violet/black wire to the right rear speaker's negative
terminal.

7. Connect the green wire to the left rear speaker's positive terminal.

8. Connect the green/black wire to the left speaker's negative terminal.

Connecting One Pair of Speakers

For 12-2155: If you are using only one pair of speakers, follow Steps 1-4
in "Connecting Two Pairs of Speakers" above to connect the
harness with the 14-pin connector to the speakers.

(White) - Left Speaker (+)
(White/Black) - Left Speaker (-)
(Gray) - Right Speaker (+)
(Gray/Black) - Right Speaker (-)

(Green) - |\
(Green/Black) - |\\___ Do Not Connect
(Violet) - |//
(Violet/Black) - |/

For 12-2154: If you are using only one pair of speakers, remove the tape
that holds the mounting sleeve in place and slide the sleeve
off of the stereo. Then set 2CH/4CH on the bottom of the
stereo to 2CH. Then follow these steps to connect the
harness with the 14-pin connector to the speakers.

(This section has been corrected. See Faxback Doc. # 48535.)

(White) - Left Speaker (+)
(Green) - Left Speaker (-)
(Gray) - Right Speaker (+)
(Violet) - Right Speaker (-)

(White/Black) - |\
(Green/Black) - |\\___ Do Not Connect
(Gray/Black) - |//
(Violet/Black) - |/

1. Connect the gray wire to the right speaker's positive terminal. This
terminal is usually marked with a plus (+) sign or red mark.

2. Connect the violet wire to the right speaker's negative terminal.
This terminal might be marked with a minus (-) sign or it might not be
marked at all.

3. Connect the white wire to the left speaker's positive terminal.

4. Connect the green wire to the left speaker's negative terminal.

Connecting the Antenna

Connect the vehicle's antenna cable to the antenna jack on the back of the
stereo.

Completing the Connections