Optimus Cassette Player CTR 107 User Manual

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Cat. No. 14-1112  
OWNER’S MANUAL  
Please read before using this equipment.  
CTR-107  
Portable Cassette  
Tape Recorder  
 
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Tape Counter — helps you quickly locate a specific  
section on the tape.  
Automatic Level Control (ALC) Circuit — automat-  
ically adjusts to the proper recording level.  
Auto Stop — automatically stops the recorder when  
the tape reaches the end during playback or record-  
ing.  
Pause Control — lets you edit as you record.  
Three Power Sources — let you power the recorder  
using four AA batteries, a standard AC outlet (with an  
optional AC adapter), or your vehicle’s cigarette-  
lighter socket (with an optional DC adapter).  
Built-In Carrying Strap — lets you easily carry the  
cassette recorder anywhere you go.  
Supplied Earphone — lets you listen in privacy.  
Erase Plug — lets you erase a tape without record-  
ing any sound over it.  
MIC Jack — lets you connect an optional external mi-  
crophone.  
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CONTENTS  
Preparation ........................................................... 5  
Connecting Power ........................................... 5  
Using Internal Batteries ............................ 5  
Using AC Power ....................................... 8  
Using Vehicle Battery Power .................. 10  
Using the Earphone ...................................... 12  
Listening Safely ...................................... 12  
Traffic Safety .......................................... 13  
Operation ............................................................ 14  
Loading a Cassette Tape .............................. 14  
Playing a Cassette Tape ............................... 16  
Using Fast-Forward/Rewind ................... 18  
Using the Tape Counter ......................... 19  
Recording ...................................................... 20  
Using an External Microphone ............... 22  
Tape Tips ....................................................... 24  
Recommended Tapes ............................ 24  
Erasing a Cassette Tape ........................ 24  
Preventing Accidental Erasure ............... 25  
Restoring Tape Tension and  
Sound Quality ........................................ 27  
Maintenance ........................................................ 28  
Cleaning the Tape-Handling Parts ................ 30  
Specifications ..................................................... 33  
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PREPARATION  
CONNECTING POWER  
You can power the CTR-107 from any of three power  
sources:  
• Internal batteries  
• Standard AC power (with an optional AC  
adapter)  
Your vehicle’s cigarette-lighter socket (with an  
optional DC adapter)  
Note:  
Connecting an adapter disconnects internal  
batteries.  
Using Internal Batteries  
You can power the CTR-107 from four AA batteries  
(not supplied). For the best performance, we recom-  
mend alkaline batteries, such as RadioShack Cat.  
No. 23-557.  
You can also use rechargeable nickel-cadmium bat-  
teries (Cat. No. 23-125) with a battery charger (Cat.  
No. 23-133).  
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Follow these steps to install batteries:  
1. Press down on the battery compartment cover  
and slide it off in the direction of the arrows.  
2. Install the batteries as indicated by the polarity  
symbols (+ and –) marked outside the compart-  
ment.  
Cautions:  
Use only fresh batteries of the required size  
and type.  
Do not mix old and new batteries, different  
types of batteries (standard, alkaline, or re-  
chargeable), or rechargeable batteries of dif-  
ferent capacities.  
Always dispose of old batteries promptly and  
properly.  
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Never leave dead, old or weak batteries in the  
CTR-107. Batteries can leak chemicals and  
corrode or damage electronic circuits.  
3. Replace the cover.  
Notes:  
• If you plan not to use the CTR-107 for a week or  
more, or you plan to use an AC or DC adapter,  
remove the batteries to protect the CTR-107  
from possible battery leakage.  
• When the RECORD/BATT indicator becomes  
dim during operation or does not light when you  
turn on the recorder, replace the batteries.  
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Important: Your recorder is capable of using re-  
chargeable nickel-cadmium batteries. At the end of  
the batteries’ life, they must be recycled or disposed  
of properly. Contact your local, county, or state haz-  
ardous waste management authorities for information  
on recycling or disposal programs in your area. Some  
options that might be available are: municipal curb-  
side collection, drop-off boxes at retailers such as  
your local RadioShack store, recycling collection cen-  
ters, and mail-back programs.  
Using AC Power  
To power the CTR-107 from an AC outlet, you need  
an AC adapter (not supplied), such as Cat. No. 273-  
1663 or 273-1664.  
Cautions:  
• The recommended AC adapter supplies 6 volts  
and delivers at least 300 millliamps. Its center tip  
is set to negative, and its plug correctly fits the  
DC 6V jack on the CTR-107. Using an adaper  
that does not meet these specifications could  
seriously damage the CTR-107 or the adapter.  
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• Always plug the AC adapter into the CTR-107  
before you plug it into the AC outlet, and unplug  
the AC adapter from the AC outlet before you  
unplug its barrel plug from the CTR-107.  
Follow these steps to connect the CTR-107 to AC  
power.  
1. Set the adapter’s voltage switch to 6V.  
2. Insert the adapter’s 5.5 mm outer diameter/2.1  
mm inner diameter barrel plug into the adapter’s  
cord so it reads –TIP.  
3. Insert the AC adapter’s barrel plug into the DC 6V  
jack on the CTR-107.  
4. Plug the AC adapter into a standard AC outlet.  
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Using Vehicle Battery Power  
You can power the CTR-107 from your vehicle’s ciga-  
rette-lighter socket using a DC adapter (not supplied),  
such as Cat. No. 273-1802.  
Cautions:  
• The recommended DC adapter supplies 6 volts  
and delivers at least 300 milliamps. Its center tip  
is set to negative, and its plug correctly fits the  
CTR-107’s DC 6V jack. Using an adapter that  
does not meet these specifications could dam-  
age the CTR-107 or the adapter.  
• Always plug the DC adapter into the CTR-107  
before you plug it into the cigarette-lighter  
socket, and always unplug the adapter from the  
cigarette-lighter socket before you unplug it from  
the CTR-107.  
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Follow these steps to connect the CTR-107 to vehicle  
battery power.  
1. Set the DC adapter’s voltage switch to 6V.  
2. Insert the adapter’s barrel plug into the CTR-  
107’s DC 6V jack.  
3. Plug the adapter’s larger plug into the vehicle’s  
cigarette-lighter socket.  
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USING THE EARPHONE  
To listen in privacy, insert the supplied earphone’s 1/8-  
inch plug into the EAR jack.  
Note:  
Connecting the earphone automatically discon-  
nects the built-in speaker.  
Listening Safely  
To protect your hearing, follow these guidelines when  
you use the earphone.  
• Set the volume to the lowest setting before you  
begin listening. After you begin listening, adjust  
the volume to a comfortable level.  
• Do not listen at extremely high volume levels.  
Extended high volume listening can lead to per-  
manent hearing loss.  
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• Once you set the volume, do not increase it.  
Over time, your ears adapt to the volume level,  
so a volume level that does not cause discomfort  
might still damage your hearing.  
Traffic Safety  
Do not wear the earphone while operating a motor  
vehicle or riding a bicycle. This can create a traffic  
hazard and is illegal in some areas.  
Even though some earphones are designed to let you  
hear some outside sounds when listening at normal  
volume levels, they still present a traffic hazard.  
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OPERATION  
LOADING A CASSETTE TAPE  
Note:  
Metal tapes are not recommended for use with  
this cassette player.  
1. Take up any slack in the tape by turning one of  
the cassette’s hubs with a pencil. Do not touch  
the tape.  
Caution:  
If you do not remove the excess slack,  
the tape might become tangled in the record/  
playback mechanism.  
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2. Press STOP/EJECT to open the cassette com-  
partment door.  
3. Load the cassette with its open edge out, the  
side you want to play facing up, and its full reel to  
the left.  
4. Close the door.  
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PLAYING A CASSETTE TAPE  
1. Load the cassette tape.  
2. Press PLAY. The cassette plays until it reaches  
the end of the side, then it automatically stops.  
Note:  
PAUSE  
to temporarily stop playback.  
Press  
Press PAUSE again to resume playback.  
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3. Adjust VOLUME as desired.  
4. Press STOP/EJECT to completely stop playback  
before it automatically stops. Press STOP/EJECT  
again to open the cassette compartment and  
remove the cassette tape.  
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Using Fast-Forward/Rewind  
While the tape is stopped, press REVIEW/REWIND or  
CUE/FAST-F to rapidly wind the tape backward or for-  
ward. Press STOP/EJECT, then PLAY again to resume  
playback.  
If you press and hold down REVIEW/REWIND or CUE/  
FAST-F while the tape is playing, you can hear the  
tape as it moves at a faster speed. This makes it easy  
to locate a specific part of a recording (such as the  
space between tracks). When you release REVIEW/  
REWIND or CUE/FAST-F, the tape plays at its normal  
speed.  
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Using the Tape Counter  
You can use the tape counter to help you find specific  
locations on the tape.  
At the beginning of a tape, press the reset button to  
reset the tape counter to 000. Then note the  
counter’s reading at the beginnng of each selection.  
To return to a selection, fast-forward or rewind the  
tape until the counter shows the noted reading.  
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RECORDING  
Notes:  
• Before you load a cassette tape for recording, be  
sure its erase-protection tabs are in place (see  
“Preventing Accidental Erasure” on Page 25).  
• The recorder’s Automatic Level Control (ALC)  
circuit automatically adjusts the recording level.  
VOLUME has no effect on recording.  
1. Load a blank cassette tape, or one you want to  
record over, into the cassette compartment.  
2. Set VOICE ACTIVATION to the desired sensitivity.  
HIGH — begins recording from soft, low sounds  
as well as loud sounds.  
LOW — requires a normal to loud sound to begin  
recording.  
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OUT — immediately begins recording when you  
press RECORD (unless PAUSE is pressed down).  
3. Press RECORD to begin recording. Both PLAY  
and RECORD lock down. As the recorder  
records, the RECORD/BATT indicator flashes.  
Notes:  
If VOICE ACTIVATION is set to HIGH or LOW,  
recording begins when the recorder detects  
an audible signal. If the sound stops or  
becomes inaudible for about 5 seconds, the  
recorder automatically stops. The recorder  
automatically starts recording again when the  
recorder receives another audible signal.  
If you press and hold down REVIEW/REWIND  
or CUE/FAST-F while recording, the RECORD  
button releases and the tape rewinds or fast-  
forwards. You can hear the recorded sound so  
you can locate any desired segment on the  
tape. When you release REVIEW/REWIND or  
CUE/FAST-F, the recorder plays the cassette.  
To continue recording, press STOP/EJECT,  
then press RECORD.  
To temporarily stop recording, press PAUSE.  
Press PAUSE again to resume recording.  
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4. Press STOP/EJECT to stop recording before it  
automatically stops at the end of the tape side.  
Using an External Microphone  
You can connect an external microphone (not sup-  
plied) with a 1/8-inch plug to the CTR-107. The proper  
microphone to use with this recorder is Cat. No. 33-  
3014. Its microphone plug correctly fits the CTR-  
107’s MIC jack.  
Note: Connecting an external microphone automati-  
cally disconnects the built-in microphone.  
1. Insert the microphone’s 1/8-inch plug into the  
CTR-107’s MIC jack. Then follow the steps in  
“Recording” on Page 20.  
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Notes:  
If the external microphone has a separate,  
smaller plug for remote operation, insert that  
plug into the REMOTE jack, then use the  
microphone’s switch to turn on and off the  
recorder. If VOICE ACTIVATION is not set to  
OUT, recording only starts when the switch is  
on and the recorder receives an audible sig-  
nal.  
You can monitor the recording with the sup-  
plied earphone. Otherwise, do not use the  
earphone during recording. The built-in micro-  
phone’s circuitry can cause feedback noise in  
the earphone.  
2. Speak into the external microphone.  
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TAPE TIPS  
Recommended Tapes  
Tape quality greatly affects the quality of the record-  
ing. We recommend extended-range or low noise  
Type 1 regular length (60- or 90-minute) normal-bias  
cassette tapes. We do not recommend long-play cas-  
sette tapes such as C-120s because they are thin  
and can easily tangle.  
Erasing a Cassette Tape  
To record over a cassette tape, simply record as usu-  
al. The cassette deck records over the previous re-  
cording.  
To erase the entire cassette tape, insert the supplied  
erasing plug into the MIC jack and press RECORD.  
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If you need to erase an entire cassette, you might  
prefer using a bulk tape eraser, available at your local  
RadioShack store.  
Preventing Accidental Erasure  
Cassette tapes have two erase-protection tabs —  
one for each side. When a tab is in place, you can  
record on that side.  
To protect a recording from being accidentally record-  
ed over or erased, use a screwdriver to remove one  
or both of the cassette tape’s erase-protection tabs.  
This prevents RECORD from being pressed.  
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If you later decide to record on a tape side after you  
have removed its erase-protection tab, place a piece  
of strong plastic tape over the side’s erase-protection  
hole. Be sure you cover only the hole originally cov-  
ered by the erase-protection tab.  
Caution: Removing the erase-protection tabs does  
not prevent a bulk tape eraser from erasing a cas-  
sette tape.  
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Restoring Tape Tension and Sound  
Quality  
After you play a cassette tape several times, the tape  
might become tightly wound on the reels. This can  
cause playback sound quality to deteriorate.  
To restore the sound quality, fast-forward the tape  
from the beginning to the end of one side, then com-  
pletely rewind it. Then loosen the tape reels by gently  
tapping each side of the cassette’s outer shell on a  
flat surface.  
Caution: Be careful not to damage the cassette  
when tapping it. Do not touch the exposed tape or al-  
low any sharp objects near the cassette.  
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MAINTENANCE  
Your Optimus CTR-107 Portable Cassette Tape Re-  
corder is an example of superior design and crafts-  
manship. The following suggestions will help you care  
for your CTR-107 so you can enjoy it for years.  
• Keep the CTR-107 dry. If it gets wet, wipe it dry  
immediately. Liquids can contain minerals that  
corrode electronic circuits.  
• Use and store the CTR-107 only in normal tem-  
perature environments. Temperature extremes  
can shorten the life of electronic devices, dam-  
age batteries, and distort or melt plastic parts.  
• Handle the CTR-107 gently and carefully. Drop-  
ping it can damage circuit boards and cases and  
can cause the CTR-107 to work improperly.  
• Keep the CTR-107 away from dust and dirt,  
which can cause premature wear of parts.  
• Use only fresh batteries of the recommended  
size and type. Old batteries can leak chemicals  
that can damage your CTR-107’s electronic cir-  
cuits.  
• Wipe the CTR-107 with a damp cloth occasion-  
ally to keep it looking new. Do not use harsh  
chemicals, cleaning solvents, or strong deter-  
gents to clean your CTR-107.  
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Modifying or tampering with the CTR-107’s internal  
components can cause a malfunction and might in-  
validate your CTR-107’s warranty. If your CTR-107 is  
not performing as it should, take it to your local Ra-  
dioShack store for assistance.  
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CLEANING THE TAPE-HANDLING  
PARTS  
Dirt, dust, or particles of the tape’s coating can accu-  
mulate on the tape heads and other parts that the  
tape touches. This can greatly reduce the cassette  
player’s performance.  
To help keep the cassette player working at its best,  
clean the cassette player’s tape-handling parts after  
every 20 hours of use.  
1. Remove the batteries and disconnect any other  
power source.  
2. Open the cassette compartment cover.  
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3. Use a pencil eraser to press down on the erase  
protection tab sensor in the cassette compart-  
ment. Then press RECORD to expose the tape-  
handling parts.  
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4. Use a swab dipped in alcohol to gently clean the  
capstan, pinch roller, tape guides, and tape and  
erase heads.  
5. When you finish cleaning, press STOP/EJECT  
and close the compartment cover. Then recon-  
nect power.  
You can also use a cassette deck cleaning kit, avail-  
able from your local RadioShack store.  
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SPECIFICATIONS  
CASSETTE PLAYER  
Tape System ..................................2-Track Monaural  
Tape Speed ...................................................17/8 in/s  
Wow and Flutter (WRMS) ...............................0.35%  
Signal-to-Noise Ratio ...................................... 35 dB  
Recording System ........................................AC Bias  
Erase System.................................................Magnet  
GENERAL  
Power Requirements ...............................6 Volts DC,  
4 AA Batteries (Cat. No. 23-557),  
AC Adapter (Cat. No. 273-1662),  
or DC Adapter (Cat. No. 273-1802)  
Dimensions (HWD)................ 73/8 x 43/4 x 13/8 Inches  
(188 x 121 x 36 mm)  
Weight ......................................................... 14.11 oz  
(400 gm)  
Included Accessories .............Earphone, Erase Plug  
Specifications are typical; individual units might vary.  
Specifications are subject to change and improve-  
ment without notice.  
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NOTES  
34  
 
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Limited Ninety-Day Warranty  
This product is warranted by RadioShack against manufacturing defects in material  
and workmanship under normal use for ninety (90) days from the date of purchase  
from RadioShack company-owned stores and authorized RadioShack franchisees  
and dealers. In the event of a product defect during the warranty period, take the  
product and the RadioShack sales receipt as proof of purchase date to any Ra-  
dioShack store. RadioShack will, at its option, unless otherwise provided by law:  
(a) correct the defect by product repair without charge for parts and labor; (b) re-  
place the product with one of the same or similar design; or (c) refund the purchase  
price. All replaced parts and products, and products on which a refund is made, be-  
come the property of RadioShack. New or reconditioned parts and products may  
be used in the performance of warranty service. Repaired or replaced parts and  
products are warranted for the remainder of the original warranty period. You will  
be charged for repair or replacement of the product made after the expiration of the  
warranty period.  
This warranty does not cover: (a) damage or failure caused by or attributable to  
acts of God, abuse, accident, misuse, improper or abnormal usage, failure to follow  
instructions, improper installation or maintenance, alteration, lightning or other inci-  
dence of excess voltage or current; (b) any repairs other than those provided by a  
RadioShack Authorized Service Facility; (c) consumables such as fuses or batter-  
ies; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f)  
costs of product removal, installation, set-up service adjustment or reinstallation.  
EXCEPT AS PROVIDED HEREIN, RadioShack MAKES NO EXPRESS WARRAN-  
TIES AND ANY IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANT-  
ABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN  
DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES  
CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL  
HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER  
PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAMAGE  
CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFORMANCE OF THE  
PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCLUD-  
ING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-  
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY  
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF  
RadioShack HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or  
the exclusion of incidental or consequential damages, 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.  
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600,  
Fort Worth, TX 76102  
We Service What We Sell  
1/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
4A7  
Printed in Hong Kong  
 

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