Optimus 120-2113 User manual

High-Power In-Dash AM/FM Stereo Cassette w/Auto Reverse
(120-2113) Feature Faxback Doc. # 62491
Your Optimus High-Power In-Dash AM/FM Stereo Cassette with Auto-Reverse
has many practical, easy-to-use features, and you can install it in almost
any vehicle. The tuner's digital synthesized PLL (Phase-Locked Loop)
circuitry gives you precise tuning and drift-free reception. The stereo's
anti-theft control panel lets you quickly remove it, making the stereo
inoperative.
The auto-reverse cassette deck, memory tuning, and seek and scan tuning
all help make your stereo's operation simple and quick so you can drive
safely.
CAUTION: Use common sense. Do not change your stereo's settings in heavy
traffic or during hazardous driving conditions.
This stereo's features include:
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.
Auto-Reverse - continuously plays both sides of a cassette
tape.
Fast-Forward/Rewind - lets you quickly move the tape to the beginning
or the end.
Metal/CrO2 Tape Selector - takes advantage of the improved sound quality
of metal or CrO2 tapes.
Advanced FM Optimizer - automatically adjusts the tuner's high
Circuitry frequency response and stereo separation to
give you the best possible sound, regardless of
the signal level.
Automatic FM Tuning - automatically changes FM reception on weak
Adjustment stations from stereo to mono, to improve
reception of those stations.
Lighted Liquid-Crystal - lets you easily see the clock/radio/cassette
Display with Clock deck's current functions.

Band Button - lets you select the AM or FM band with the push
of a button.
Seek Tuning - searches forward to the next strong station in
the selected band.
Automatic Seek - adjusts your stereo so the first time it
Sensitivity searches a band, it stops only on strong local
stations; the next time it searches, it also
stops on weaker, distant stations.
High Power - provides 22 watts of total power to give you
excellent audio response for all types of music
Digitally Synthesized - gives you precise tuning and drift-free
Circuitry reception.
Manual/Automatic Memory - lets you manually or automatically store 18 FM
Programming and 12 AM stations into memory groups so you
can quickly tune to those stations.
Memory Scan Tuning - scans all stations in an AM or FM memory group,
stopping for 5 seconds on each station.
Display Color Selector - lets you change the display's color to amber or
green.
Built-in Noise - reduces the noise caused by your vehicle's
Suppression Choke electrical system.
We recommend you record your stereo's serial number here. The number is
on the top of the stereo.
Serial Number: __________________________________________

High-Power In-Dash AM/FM Stereo Cassette w/Auto Reverse
(120-2113) Installation Faxback Doc. # 62492
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 is for accessories?
How do I connect a wire to the fuse box?
Which of the stereo's wires is the power wire?
Which stereo wires are speaker outputs?
Also, be aware that installation in your vehicle might require cutting or
modifying your vehicle.
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.
CAUTION: Be sure to avoid obstructions behind the mounting surface.
Notes: This stereo is a DIN-E size unit that requires a 2-1/16 inches (53
mm) high by 7-3/16 inches (182 mm) wide by 6-11/16-inches (170 mm)
deep mounting area.
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.
Routing Speaker Wires
If you install speakers, avoid routing the speaker wires near moving parts
or sharp edges. You can usually route wires 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 wires, replace the molding.
Removing the Shipping Screw
The shipping screw helps protect the stereo's cassette player from being
damaged during shipment.

Before you mount the stereo, use a Phillips screwdriver to remove the
screw, spacer, and rubber washer from the top of the stereo. This allows
you to remove the mounting sleeve from the stereo.
Note: Save the screw, spacer, and rubber washer in case you ever want to
ship the stereo. You can secure them 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. RadioShack will provide
warranty service if you cut a wire and find the product is
defective.
You might need additional wire, depending on your individual auto sound
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 22 watts of power (11 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 (-), POWER LEAD (B+), and CLOCK
MEMORY wires first, then make all other connections as described
in the following sections before you plug the harness into the
stereo. If you do not make the connections in the order shown,
an incorrect connection could damage the stereo.
You must connect a separate wire to each speaker terminal as
described in "Connecting Two Pairs of Speakers" and "Connecting
One Pair of Speakers" below. Do not use a common wire or chassis
ground for any speaker connection.
Note: The wiring harness has the following labels:
_ +
____Front Left Speaker__/

| \_ -
| _ +
(connector) | ___Rear Left Speaker___/
________ || \_ -
|________| || _ +
|||||||| || __Front Right Speaker_/
|||||||| ||| \_ -
|||||||| ||| _ +
|||||||| ||| _Rear Right Speaker__/
||||||||_____|||| \_ -
|||||||_______|||
||||||_________||
|||||___________|
||||
|||| (Wire Harness)
||||
||||--Black--------GROUND (-)----------(To Chassis Ground)
|||
|||--Red----------POWER LEAD (B+)------(To ACC)
||
||---Blue/White---AMP REMOTE TURN ON---(To Optional Equipment)
|
|----Yellow-------CLOCK MEMORY---------(To Battery +)
Using an Adapter Harness
If you are replacing an existing stereo, or if your vehicle has been
factory-wired for autosound components, you can 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 power and speakers.
After you connect the adapter harness to your vehicle, you can skip
"Connecting Two Pairs of Speakers" or "Connecting One Pair of Speakers"
below.
Connecting Ground, Power, and Optional Components
Follow these steps to connect the harness to ground, primary and memory
backup power, and optional components.
(connector)
________
|________|

||||
||||__Black-----------GROUND (-)---------------(To Chassis Ground)
|||
|||___Red-------------POWER LEAD B+ -----------(To ACC)
||
||____Blue/White------AMP REMOTE TURN ON ------(To Optional Equipment)
|
|_____Yellow----------CLOCK MEMORY ------------(To Battery +)
1. Disconnect the cable from your vehicle battery's negative (-)
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.
Harness with 14-pin Connector
________
|________|
|
|_____Red_____POWER LEAD B+ (To ACC or START)
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 (with in-line fuse holder) 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 clock), 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 Two Pairs of Speakers
If you are using both front and rear speakers, follow these steps to
connect the harness to the speakers.
(connector)
___________
Left |___________| Right
|||| ||||
(+) White__________|||| ||||___Gray (+)
Front ||| ||| Front
(-) White/Black_____||| |||____Gray/Black (-)
|| ||
(+) Green____________|| ||_____Violet (+)
Rear | | Rear
(-) Green/Black_______| |______Violet/Black (-)
1. Use a small screwdriver to move 2 ch/4 ch on the bottom of the stereo
to 4 ch (four channel).
2. Connect the gray wire to the right front speaker's positive terminal.
This terminal is usually marked with a plus sign or red mark.
3. 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.
4. Connect the white wire to the left front speaker's positive terminal.
5. Connect the white/black wire to the left front speaker's negative
terminal.
6. Connect the violet wire to the right rear speaker's positive terminal.
7. Connect the violet/black wire to the right rear speaker's negative
terminal.
8. Connect the green wire to the left rear speaker's positive terminal.
9. Connect the green/black wire to the left rear speaker's negative
terminal.
Connecting One Pair of Speakers

If you are using only one pair of speakers, follow these steps to connect
the harness to the speakers.
(connector)
__________
Left |__________| Right
|||| ||||
______(+) White_______|||| ||||___Gray (+)____________
| ||| ||| |
| X __(-) White/Black__||| |||____Gray/Black (-)__X |
SPK. / || || \ SPK.
\ X __(+) Green_________|| ||_____Violet (+)______X /
| | | |
|______(-) Green/Black____| |______Violet/Black (-)____|
1. Use a small screwdriver to move 2 ch/4 ch on the bottom of the stereo
to 2 ch (two channel).
2. Connect the gray wire to the right speaker's positive terminal. This
terminal is usually marked with a plus (+) sign or red mark.
3. Connect the violet/black 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.
4. Connect the white wire to the left speaker's positive terminal.
5. Connect the green/black wire to the left speaker's negative terminal.
Connecting the Antenna
Connect the vehicle's antenna cable to the stereo's large black antenna
Connector.
Completing the Connections
Make sure you have securely made all other connections, then plug the
harness' connector into the stereo's 14-pin wiring socket. Then reconnect
the cable to the vehicle battery's negative terminal.
Testing The Connections
Turn on your vehicle's ignition and install your stereo's control panel
(see "Installing the Control Panel" in Faxback Doc. # 62493). The display
should light and the currently set time (or 12:00) should appear on the
display when you press POWER to turn on the stereo.

If the stereo does not work, immediately disconnect the cable from your
vehicle battery's negative (-) terminal. Then recheck your connections.
After you verify that the display lights, follow the instructions in
"Mounting the stereo" below.
Mounting The Stereo
Once you verify that the stereo is connected properly, follow these steps
to mount the stereo.
1. Disconnect the cable from the vehicle battery's negative (-) terminal.
2. Disconnect the wire harness and the antenna.
3. Press REL on the right side of the control panel to remove it (see
"Removing the Control Panel" in Faxback Doc. # 62493).
4. Insert both of the supplied keys into the slots at the bottom left and
right sides of the stereo.
Press the keys downward, and slide the sleeve off of the stereo.
5. Remove the keys from the slots.
6. Put the sleeve into the dash, then secure it by bending out all the
tabs with a screwdriver.
7. If your vehicle has an existing mounting hole in the dash, use pliers
or a 5/16-inch box-end wrench to attach the supplied washer and the
short end of the supplied mounting bolt to the back of the stereo.
Note: The other end of the mounting bolt is covered by a rubber
mounting grommet.
8. Reconnect the wire harness and the antenna.
9. Slide the stereo into the sleeve until it locks into place.
If you are securing the stereo in an existing mounting hole in the
dash, push the mounting bolt (covered by the mounting grommet) through
the existing mounting hole and make sure it is secure.
Note: If the mounting bolt is too short to reach the mounting hole,
remove the rubber mounting grommet and screw the supplied
mounting bolt extender onto the mounting bolt. Then push the

rubber grommet onto the mounting bolt.
Otherwise, you can use the supplied bolt and washer to attach one end
of the supplied metal strap to the mounting bolt on the back of the
stereo. If necessary, bend the metal strap to fit your vehicle's
mounting area. Then use the supplied sheet metal screw to attach the
other end of the strap to a solid metal part of the vehicle under the
dashboard. This strap also helps ensure proper electrical grounding
of the stereo.
10. Snap the plastic collar onto the front of the stereo.
11. Reconnect the cable to the vehicle battery's negative (-) terminal.
Note: You might need to reset the stereo's clock after you reconnect
the cable to the vehicle battery.
Removing The Stereo From The Dash
If you ever want to remove the stereo from the dash, follow these steps.
1. Disconnect the cable from the vehicle battery's negative (-) terminal.
2. If you secured the stereo to an existing mounting hole under the dash,
slide out the stereo to free the mounting bolt from the mounting hole.
Or, remove the bolt holding the metal strap to the back of the stereo.
3. Press REL to remove the stereo's control panel.
4. Snap the plastic collar off of the front of the stereo.
5. Insert both of the supplied keys into the slots at the bottom left and
right sides of the stereo. Press the keys downward and slide the
stereo out of the dash.
6. Remove the keys from the slots.
7. Disconnect the wire harness and the antenna.
8. Reconnect the cable to the vehicle battery's negative (-) terminal.