Optimus Cassette Player CTR 108 User Manual

14-1115.fm Page 1 Friday, January 8, 1999 10:31 AM  
Cat. No. 14-1115  
A
OWNER’S MANUAL  
Please read before using this equipment.  
CTR-108  
ACDC Portable  
Cassette Recorder  
 
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CONTENTS  
Preparation............................................................................................................. 4  
Connecting Power............................................................................................. 4  
Using Internal Batteries.............................................................................. 4  
Using AC Power.......................................................................................... 5  
Using Vehicle Battery Power....................................................................... 5  
Using an Earphone ........................................................................................... 6  
Listening Safely .......................................................................................... 6  
Traffic Safety............................................................................................... 6  
Operation................................................................................................................ 7  
Loading a Cassette Tape .................................................................................. 7  
Playing a Cassette Tape.................................................................................... 7  
Recording.......................................................................................................... 8  
Using the Built-In Microphone .................................................................... 8  
Using an External Microphone ................................................................... 8  
Recording from a Connected Audio Source ............................................... 9  
Tape Tips......................................................................................................... 10  
Recommended Tapes............................................................................... 10  
Erasing a Cassette Tape........................................................................... 10  
Preventing Accidental Erasure ................................................................. 10  
Restoring Tape Tension and Sound Quality.............................................. 11  
Maintenance......................................................................................................... 12  
Cleaning the Tape-Handling Parts .................................................................. 13  
Specifications ...................................................................................................... 14  
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PREPARATION  
2. Install the batteries as indicated  
by the polarity symbols (+ and –)  
marked inside the compartment.  
CONNECTING POWER  
You can power the CTR-108 from any  
of three power sources:  
Cautions:  
• Internal batteries  
• Use only fresh batteries of the  
required size and recom-  
mended type.  
• Standard AC power (with the sup-  
plied power cord)  
• Do not mix old and new batter-  
ies, different types of batteries  
(standard, alkaline, or re-  
chargeable), or rechargeable  
batteries of different capacities.  
Your vehicle’s cigarette-lighter  
socket (with an optional DC  
adapter)  
Note: Connecting an AC power cord or  
a DC adapter disconnects the internal  
batteries.  
3. Replace the cover.  
When the RECORD indicator be-  
comes dim, replace the batteries.  
Using Internal Batteries  
Cautions:  
You can power the CTR-108 from four  
C batteries (not supplied). For the best  
performance, we recommend alkaline  
batteries, such as RadioShack Cat.  
No. 23-551/651.  
• Always dispose of old batteries  
promptly and properly.  
• Never leave dead, old, or weak  
batteries in the CTR-108. They  
can leak chemicals and corrode or  
damage electronic circuits.  
• If you do not plan to use the CTR-  
108 for a week or more, or if you  
plan to use an adapter only,  
remove the batteries to protect the  
CTR-108 from possible battery  
leakage.  
{
|
|
{
{
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{
1. Press down on the battery com-  
partment cover and slide it off in  
the direction of the arrow.  
4
 
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Cautions:  
Using AC Power  
You must use a DC adapter that  
supplies 6 volts and delivers at  
least 300 milliamps. Its center tip  
must be set to negative, and its  
plug must correctly fit the CTR-  
108’s DC IN 6V jack. The recom-  
mended adapter meets these  
specifications. Using an adapter  
that does not could damage the  
CTR-108 or the adapter.  
To power the CTR-108 from standard  
AC power, plug the supplied power  
cord into the AC IN jack on the side of  
the CTR-108. Then plug the other end  
into a standard AC outlet.  
O
P
T I  
M
U
S
CTR-108 CASSETTE RECORDER  
AC/DC/BATTERY  
• Always plug the adapter into the  
CTR-108 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-108.  
Cautions:  
• Always plug the power cord into  
the AC IN jack before you plug it  
into the AC outlet, and always  
unplug the power cord from the  
AC outlet before you unplug it  
from the AC IN jack.  
DC IN 6V  
AUX  
EAR  
REM MIC  
VOLUME  
• The power cord has a polarized  
plug that is designed to fit into the  
recorder’s jack only one way. If the  
plug does not easily fit into the  
jack, do not force it. Simply turn it  
over and try again.  
Using Vehicle Battery Power  
1. Set the DC adapter’s voltage  
switch to 6V.  
You can power the CTR-108 from your  
vehicle’s cigarette-lighter socket using  
a DC adapter, such as Cat. No. 273-  
1802 (not supplied).  
2. Insert the adapter’s barrel plug  
into the CTR-108’s DC IN 6V jack.  
3. Insert the adapter’s larger plug  
into the vehicle’s cigarette-lighter  
socket.  
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Traffic Safety  
USING AN EARPHONE  
Do not wear an earphone while operat-  
ing a motor vehicle or riding a bicycle.  
This can create a traffic hazard and  
can be illegal in some areas.  
For private listening, insert the sup-  
plied earphone’s /8-inch plug into the  
EAR jack.  
1
DC IN 6V  
AUX  
EAR  
REM MIC  
VOLUME  
Even though some earphones let you  
hear some outside sounds when lis-  
tening at normal volume levels, they  
still can present a traffic hazard.  
Note: Connecting the earphone auto-  
matically disconnects the built-in  
speaker.  
Listening Safely  
To protect your hearing, follow these  
guidelines when you use the ear-  
phone.  
• Set the volume to the lowest set-  
ting before you begin listening.  
After you begin listening, adjust  
the volume to a comfortable level.  
• Do not listen at extremely high vol-  
ume levels. Extended high volume  
listening can lead to permanent  
hearing loss.  
• Once you set the volume, do not  
increase it. Over time, your ears  
adapt to the volume level, so a vol-  
ume level that does not cause dis-  
comfort might still damage your  
hearing.  
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OPERATION  
LOADING A CASSETTE  
TAPE  
PLAYING A CASSETTE  
TAPE  
1. Take up any slack in the tape by  
turning one of the cassette’s hubs  
with a pencil.  
1. Load the cassette tape.  
2. Press PLAY. The cassette plays  
until it reaches the end of the side,  
then it automatically stops.  
MIC  
FAST-F  
Caution: If you do not remove the  
excess slack, the tape could  
become tangled in the record/  
playback mechanism.  
Notes:  
• Press PAUSE to temporarily  
stop playback. Press PAUSE  
again to resume playback.  
2. Press STOP/EJECT to open the  
To rapidly wind the tape forward  
or backward, press STOP/  
EJECT, then FAST-F or REWIND.  
Press PLAY to resume play-  
back.  
cassette compartment door.  
MIC  
FAST-F  
3. Adjust VOLUME as desired.  
3. Load the cassette in the slot in the  
door with its open edge out, the  
side you want to play facing up,  
and its full reel to the left.  
4. Press STOP/EJECT to completely  
stop playback before it automati-  
cally stops. Press STOP/EJECT  
again to open the cassette com-  
partment and remove the cassette  
tape.  
4. Close the door.  
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4. Speak into MIC.  
RECORDING  
Notes:  
MIC  
• Before you load a cassette tape  
for recording, be sure its erase-  
protection tabs are in place (see  
“Preventing Accidental Erasure”  
on Page 10).  
FAST-F  
5. Press STOP/EJECT to stop record-  
ing.  
• The recorder’s Automatic Level  
Control (ALC) circuit automatically  
adjusts the recording level. VOL-  
UME has no effect on recording.  
Using an External  
Microphone  
You can connect an external micro-  
phone (not supplied) with a 1/8-inch  
plug to the CTR-108. Your local  
RadioShack store sells a variety of mi-  
crophones.  
Using the Built-In Microphone  
1. Load a blank cassette tape, or one  
you want to record over, into the  
cassette compartment.  
Note: Connecting an external micro-  
phone automatically disconnects the  
built-in microphone.  
2. Place the CTR-108 2 to 3 feet  
from the recording source.  
3. Press RECORD to begin record-  
ing. Both PLAY and RECORD lock  
down.  
Follow these steps to record using an  
external microphone.  
1. Load a blank cassette tape, or one  
you want to record over, into the  
cassette compartment.  
MIC  
FAST-F  
2. Insert the microphone’s plug into  
the CTR-108’s MIC jack.  
Note: To temporarily stop record-  
ing, press PAUSE. Press PAUSE  
again to resume recording.  
DC IN 6V  
AUX  
EAR  
REM  
VOLUME  
MIC  
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Note: If the external microphone  
has a separate, smaller plug for  
remote operation, insert that plug  
into the REM jack. Then you can  
use the microphone’s remote  
switch to stop or start recording.  
Note: If you connected an external mi-  
crophone, disconnect it.  
1. Load a blank cassette tape, or one  
you want to record over, into the  
cassette compartment.  
2. Connect the external source to the  
3. Press RECORD to begin record-  
ing. Both PLAY and RECORD lock  
down.  
AUX jack.  
DC IN 6V  
AUX  
EAR  
REM  
VOLUME  
MIC  
Note: To temporarily stop record-  
ing, press PAUSE. Press PAUSE  
again to resume recording.  
4. Speak into the external micro-  
phone.  
External  
source  
5. Press STOP/EJECT to stop record-  
ing.  
3. Start the external audio source  
and set its volume control to a nor-  
mal listening level.  
Recording from a Connected  
Audio Source  
4. Press RECORD to begin record-  
ing. Both PLAY and RECORD lock  
down.  
You can record directly from an exter-  
nal audio source, such as a radio, tape  
deck, or CD player. To make the con-  
nection, you need a suitable mono  
patch cord with a /8-inch plug (avail-  
able from your local RadioShack  
store).  
Note: To temporarily stop record-  
ing, press PAUSE. To resume  
recording, press PAUSE again.  
1
5. Press STOP/EJECT to stop record-  
ing. Then stop the audio source.  
Note: During recording, the speaker is  
muted. If you want to monitor the re-  
cording, use the supplied earphone.  
Note: Before you connect an external  
audio source to the recorder, be sure  
the source’s and the recorder’s volume  
controls are set to their minimum set-  
tings.  
Follow these steps to record from an  
external audio source.  
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Preventing Accidental  
Erasure  
TAPE TIPS  
Recommended Tapes  
Cassette tapes have two erase-protec-  
tion tabs — one for each side. When a  
tab is in place, you can record on that  
side.  
Tape quality greatly affects the quality  
of the recording. We recommend ex-  
tended-range or low noise Type 1 reg-  
ular length (60- or 90-minute) normal-  
bias cassette tapes. We do not recom-  
mend long-play cassette tapes such as  
C-120s because they are thin and can  
easily tangle.  
To protect a recording from being acci-  
dentally recorded over or erased, use  
a screwdriver to remove one or both of  
the cassette tape’s erase-protection  
tabs. This prevents RECORD from be-  
ing pressed.  
Erasing a Cassette Tape  
Side A Tab  
To record over a cassette tape, simply  
record as usual. The cassette deck  
records over the previous recording.  
A
To erase the entire cassette tape, in-  
sert the supplied erasing plug into the  
MIC jack and press RECORD. (Be sure  
you have not connected anything to  
the AUX jack.)  
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 that side’s erase-pro-  
tection hole. Be sure you cover only  
the hole originally covered by the  
erase-protection tab.  
DC IN 6V  
AUX  
EAR  
REM  
VOLUME  
MIC  
A
If you need to erase an entire cassette,  
you might prefer using a bulk tape  
eraser, available at your local  
RadioShack store.  
Caution: Removing the erase-protec-  
tion tabs does not prevent a bulk eras-  
er from erasing a cassette tape.  
10  
 
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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 completely  
rewind it. Then loosen the tape reels  
by gently tapping each side of the cas-  
sette’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 allow any sharp  
objects near the cassette.  
11  
 
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MAINTENANCE  
Your RadioShack CTR-108 AC DC Portable Cassette Recorder is an example of  
superior design and craftsmanship. The following suggestions will help you care for  
your CTR-108 so you can enjoy it for years.  
Keep the CTR-108 dry. If it gets wet, wipe it dry immediately. Liquids  
might contain minerals that can corrode the electronic circuits.  
Handle the CTR-108 gently and carefully. Dropping it can damage  
circuit boards and cases and can cause the CTR-108 to work improp-  
erly.  
Use and store the CTR-108 only in normal temperature environ-  
ments. Temperature extremes can shorten the life of electronic de-  
vices and distort or melt plastic parts.  
Keep the CTR-108 away from dust and dirt, which can cause prema-  
ture wear of parts.  
Wipe the CTR-108 with a damp cloth occasionally to keep it looking  
new. Do not use harsh chemicals, cleaning solvents, or strong deter-  
gents to clean the CTR-108.  
Modifying or tampering with the CTR-108’s internal components can cause a mal-  
function and might invalidate your CTR-108’s warranty. If your CTR-108 is not per-  
forming as it should, take it to your local RadioShack store for assistance.  
12  
 
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4. Gently clean the capstan, pinch  
roller, tape guides, and record/  
play head.  
CLEANING THE TAPE-  
HANDLING PARTS  
Dirt, dust, or particles of the tape’s  
coating can accumulate on the tape  
heads and other parts that the tape  
touches. This can cause noise and  
poor high-frequency response which  
can greatly reduce the cassette play-  
er’s performance.  
Tape Guides  
Capstan  
Pinch Roller  
Tape Head  
Cotton Swab  
To help keep the cassette player work-  
ing at its best, clean the cassette play-  
er’s tape-handling parts after every 20  
hours of use using a tape cleaning kit,  
such as Cat. No. 44-1115, not sup-  
plied.  
5. When you finish cleaning, press  
STOP and close the compartment  
door. Then reconnect power.  
1. Remove the batteries and discon-  
nect any other power source.  
2. Open the cassette compartment  
cover.  
3. Press the erase-protection tab  
sensor, then press RECORD to  
expose the tape-handling parts.  
13  
 
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SPECIFICATIONS  
CASSETTE PLAYER  
Track System .................................................................................2-Track Monaural  
Tape Speed ...............................................................................................4.75 cm/s  
Recording System ........................................................................................AC Bias  
Frequency Response (@ ±6 dB) ....................................................125 Hz– 6.3 kHz  
Signal-to-Noise Ratio ...................................................................................... 40dB  
Wow and Flutter (WRMS) ............................................................ Less Than 0.35%  
GENERAL  
Power Requirements ................................................................. Four C Batteries, or  
AC 120V, 60 Hz, or  
DC 6V with Optional Adapter (Cat. No. 273-1802)  
Dimensions (HWD) ...............................................................95/8 × 51/2 × 17/8 Inches  
(246 × 141 × 47 mm)  
Weight (without batteries) ............................................................................1.11 lbs  
(0.503 kg)  
Included Accessories ............................................................................. Erase Plug  
Earphone  
AC Power Cord  
Specifications are typical; individual units might vary. Specifications are subject to  
change without notice.  
14  
 
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NOTES  
15  
 
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Limited Ninety-Day Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship under normal use for ninety (90) days from the date of purchase from RadioShack company-  
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED  
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,  
INCLUDING THOSE OF MERCHANTABILITY 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 LIABIL-  
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-  
SPECT 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 WAR-  
RANTY, INCLUDING, 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 AD-  
VISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-  
cidental or consequential damages, so the above limitations or exclusions may not apply to you.  
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 RadioShack store. RadioShack will, at its option, un-  
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and  
labor; (b) replace 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, become the prop-  
erty 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 incidence of excess voltage or current; (b) any repairs  
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as  
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs  
of product removal, installation, set-up service adjustment or reinstallation.  
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  
3/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
C2131-920-0-05  
Printed in China  
02A99  
 

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