Optimus 740 User's Manual
Contents
1. 13 1287 fm Page 1 Wednesday July 14 1999 5 56 PM e S Cat No 13 1287 OWNER S MANUAL Please read before using this eguipment SYSTEM 740 Mini Stereo Component System OPTIMUS Sp S 13 1287 fm Page 2 Wednesday July 14 1999 5 56 PM FEATURES Your Optimus System 740 Mini Stereo Component System offers in one compact package all of the versatile features that you need for excellent stereo sound and entertainment The System 740 includes an AM FM Stereo tuner a dual cassette recorder with auto stop speakers and a 3 band freguency egualizer Its features include Auto Stop to protect the tape and tape handling parts automatically stops the cassette tape when it finish es Multiple Source Recording lets you record from the radio another cassette tape or an external audio source Automatic Level Control ALC automatically adjusts the recording level Consecutive Tape Play plays one side each of two tapes back to back Normal or High Speed Dubbing lets you copy tapes at normal or twice the normal speed 3 Band Frequency Equalizer lets you adjust the sound to your prefer ence and your room s unique acous tics E Bass Control boosts low tones for an emphasized bass sound Auxiliary Input Jacks let you hear an external audio source through your system Supplied Speakers let you imme diatel2. 1287 m Page 7 Wednesday July 14 1999 5 56 PM E USING E BASS Press E BASS once for enhanced bass effects The E BASS indicator lights Illus Press E BASS again for normal bass sound The E BASS indicator turns off USING THE MUTE BUTTON The MUTE button lets you temporarily turn off the sound Press MUTE to turn off the sound The MUTE indicator lights Press MUTE again to restore the sound The MUTE indicator turns off Illus MB Zs cen Page 8 Wednesday July 14 1999 5 56 PM S eo Bi RADIO OPERATION T 1 Press TUNER The TUNER indica REO indicator lights when you tor lights receive an FM broadcast in ste reo Illus Illus 2 Set BAND to AM or FM If FM stereo reception is weak set MODE to MONO The FM STEREO indicator turns off and Illus the sound is mono but the reception should improve 4 Adjust VOLUME BALANCE E BASS and FREQUENCY EQUAL IZER for the desired sound 3 Adjust TUNING to the desired sta tion Notes Your System 740 has a built in AM antenna and the AC power cord serves as an FM antenna For the best AM reception move the system For the best FM reception fully uncoil the power cord or connect an exter nal FM antenna see Connect ing an External Antenna on Page 4 If FM reception is strong set MODE to STEREO to enhance the stereo signal The FM STE sp n E Sp S 13 1287 fm Page 9 Wednesday J
3. such as C 120s because they are thin and can easily tan gle For low noise wide range recordings use normal bias tape Recording from the Radio 1 Load a blank tape or one you want to record over into TAPE 1 2 Press TUNER 3 Set BAND to FM or AM 4 Adjust TUNING to the station you want to record Note Sometimes AM broadcasts produce a hum or whistling sound that you hear while listening to a recording of them To reduce or eliminate this sound set BEAT CUT on the back of the system to the position that gives you the best quality recording Illus 5 Press PAUSE then RECORD When the selection you want plays on the radio release PAUSE to start recording 6 To stop recording press STOP EJECT SP Wi AZ 13 1287 fm Page 12 Wednesday July 14 1999 5 56 PM Dubbing a Cassette Tape You can dub at the tape s normal play ing speed or at twice the normal speed 1 Load the cassette you want to copy into TAPE 2 with the side you want to record facing you 2 Load a blank cassette or one you want to record over into TAPE 1 with the side you want to record on facing you 3 Press TAPE 4 Set DUBBING to HIGH to dub at twice the normal speed or to NORMAL to dub at normal speed Illus Note Normal speed dubbing pro duces the best quality recording 5 Press PAUSE then RECORD on TAPE 1 RECORD and PLAY lock down 6 Press PLAY on TAPE 2 TAPE 1 automatical
4. 3596 Signal tosNoise Ratio cis asics rene tee ie tabe deen te ec oreet 40 dB Separation x de Ne c Eg EE I tae teda 40 dB Frequency Response 3 dB eee 100 8000 Hz GENERAL Power Requirements eeseessesseeesesseeee nennen 120V AC 60 Hz Speaker SIZE secede 2 etate c ge ELLE Ea AA ARA n t dar Ete o on obe aS 5 Inch Speaker Speaker Output Impedance o oo u eee eee eee eene enne 4 Ohms Headphones Stereo Impedance eee 16 32 Ohms Power OulpUt c iuto eee ied etat cere ttex tvs 1 5 Watts per Channel Dimensions HWD Main Unit eee 95 s Y 105 s 91 4 Inches 244 X 270 X 235 mm Speaker eee 95 s Y 71 6 91 4 Inches 244 180 Y 235 mm Weight tide dete ue RT DOES E niae idees 13 Ib 5 9 kg Specifications are typical individual units might vary Specifications are subject to change and improvement without notice 17 p EA Sp NS 13 1287 fm Page 18 Wednesday July 14 1999 5 56 PM NOTES 18 SP Wi Sp NS 13 1287 fm Page 19 Wednesday July 14 1999 5 56 PM 19 p Wi Sp S 13 1287 fm Page 20 Wednesday July 14 1999 5 56 PM RadioShack Limited Warranty This product is warranted against defects for 90 days from date of purchase from RadioShack company owned stores and authorized RadioShack franchisees and deal ers Within this period we will repair it without charge for parts and labor Simply bring your RadioShack sales slip as proof of purchas
5. The FCC Wants You to Know eee eee eee eene nennen 16 Cleaning the Tape Handling Parts eee 16 Specifications EE 17 E 4 t Pe MB Zs VJ T 13 1287 fm Page 4 Wednesday July 14 1999 5 56 PM CONNECTIONS Caution Complete all other connec tions to the System 740 before you connect it to power CONNECTING THE SPEAKERS Illus 1 Insert the right speaker wire s plug into the 4 OHM SPK R right speaker jack on the back of the System 740 2 Insert the left speaker wire s plug into the 4 OHM SPK L left speaker jack on the back of the System 740 CONNECTING AN AUXILIARY AUDIO SOURCE To connect an auxiliary audio source such as a TV CD player or cassette deck plug the audio source s left and right LINE OUT audio wires into the AUX L left and AUX R right input jacks on the back of the System 740 Illus See Using an Auxiliary Audio Source on Page 14 for how to operate an ex ternal audio source with the System 740 CONNECTING AN EXTERNAL ANTENNA Your System 740 has two antennas The AM antenna is built in and the FM antenna is in the power cord For improved reception you can attach an FM or TV antenna not supplied to the 75 ohm or 300 ohm terminals on the back of the system Before you in stall an external antenna be sure to disconnect the built in FM antenna by loosening the upper right antenna ter minal and sliding out the U shaped connector
6. Then follow the instruc tions supplied with the antenna Illus SP Wi NZ o 13 1287 fm Page 5 Wednesday July 14 1999 5 56 PM If you have an outside VHF TV anten na you can use a signal splitter to connect this system and a TV to the same antenna Your local RadioShack store has a wide selection of antennas and connectors CONNECTING POWER To connect power after making all other connections plug your system s power cord into a standard AC outlet Illus Caution Your system s power cord has a polarized plug one blade is wid er than the other If you have difficulty inserting the plug into the outlet do not force it Turn the plug over and try again USING HEADPHONES To listen without disturbing others you can connect a pair of s inch plug ste reo headphones not supplied to the System 740 Your local RadioShack store has a wide selection of stereo headphones To connect headphones plug the headphones s inch plug into the PHONES jack on the front of the Sys tem 740 Illus Note Connecting headphones auto matically disconnects the System 740 s speakers Listening Safely To protect your hearing follow these guidelines when you use headphones Set the volume to the lowest set ting before you begin listening After you begin listening adjust the volume to a comfortable listen ing level Do not listen at ext
7. ct decuesctesceceednvcedeeeevusececeedustcuceetuveseccetersaezectcnes 6 Turning On Off the System ssie radan dan aaia aS aa a ener nnns 6 Adjusting the Balance eeesssessseseeeeseee R E a a 6 Using the Frequency Equalizer seseeeeeenn ene 6 Using E Bass reinen crecen eere AKSOS AKE Dur roe 7 Using the Mute Button sestdiena iaee eea RA a e nnne 7 Radio Operation 1i i naaa annaa eco Lider aaa anaa Aeae HREAN 8 Cassette Player Operation esee ener ennt 9 Loading a Cassette Tape sssssssssseeeneene eee ennemis 9 Playing lt a Cassette Tape ueniet ed t Pete eit tener pene capes 9 Normal Play 4 ae eder exert La ase t a tede fern 9 Fast Forward Rewind sssssesssseeeeeen nennen 10 CONSECUTIVE Play tate a a PER HERRERA 10 Recording on a Cassette Tape eeeeeeeeeee nenene n 11 Recording from the Radio eene 11 Dubbing a Cassette Tape seen 12 Tape Care M ITem 13 Preventing Accidental Erasure ssseeseeeeeee 13 Erasing a Cassette Tape esses enne 13 Restoring Tape Tension and Sound Quality eee 13 Using an Auxiliary Audio Source eene 14 Listening to an Auxiliary Audio Source eee een 14 Recording from an Auxiliary Audio Source eseeeeeeee 14 Care and Maintenance lt r ereeeeenee eee eee enema nnns 15
8. e date to any RadioShack store War ranty does not cover transportation costs Nor does it cover a product subjected to mis use or accidental damage EXCEPT AS PROVIDED HEREIN RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN Some states do not permit limitation or exclusion of implied warranties therefore the aforesaid limita tion s or exclusion s may not apply to the purchaser This warranty gives you specific legal rights and you may also have other rights which vary from state to state We Service What We Sell 10 95 RadioShack A Division of Tandy Corporation Fort Worth Texas 76102 9A6 Printed in Hong Kong p a EA
9. e the end of the tape press STOP EJECT Illus Consecutive Play The System 740 can play the first side of a cassette loaded in TAPE 2 then the first side of a cassette loaded in TAPE 1 1 Load the cassette you want to play first into TAPE 2 and the one you want to play second into TAPE 1 2 Press PLAY on TAPE 2 3 Press PAUSE and PLAY on TAPE 1 Illus The cassette in TAPE 2 plays until it reaches the end of the side Then TAPE 2 stops and TAPE 1 plays until it reaches the end of the side To manually stop consecutive play be fore the tape player automatically Stops press STOP EJECT on both decks p EA NZ o 13 1287 fm Page 11 Wednesday July 14 1999 5 56 PM RECORDING ON A CASSETTE TAPE The System 740 can record from the radio or dub copy another tape It can also record from an auxiliary au dio source see Recording from an Auxiliary Audio Source on Page 14 Notes The VOLUME E BASS BAL ANCE and FREQUENCY EQUAL IZER settings do not affect your recording The system automati cally adjusts those levels Before recording be sure the erase protection tabs are in place on the cassette tape you are recording onto see Preventing Accidental Erasure on Page 13 Tape quality greatly affects the quality of the recording We rec ommend regular length 60 or 90 minute cassette tapes We do not recommend long play cassette tapes
10. equires that you stop using your system 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 greatly reduce the performance of the System 740 Use the following cleaning procedure after every 20 hours of tape player opera tion 1 Disconnect power 16 2 Open the cassette compartment doors on TAPE 1 and TAPE 2 3 Press PLAY on TAPE 1 and TAPE 2 to expose the tape handling parts 4 Use a cotton swab dipped in denatured alcohol or tape head cleaning solution to clean the record play heads pinch rollers capstans tape guides and erase head Tape 1 Tape 2 5 When you finish cleaning press STOP EJECT on TAPE 1 and TAPE 2 close the cassette com partment doors and reconnect power Your local RadioShack store sells a complete line of cassette deck clean ing supplies SP Wi ee E S 13 1287 fm Page 17 Wednesday July 14 1999 5 56 PM SPECIFICATIONS RADIO FM AM Frequency Range 88 108 MHz 530 1710 kHz IF Rejection 60 dB 60 dB Image Rejection 20 dB 30 dB Selectivity 25 dB 20 dB Signal to Noise S N Ratio 60 dB 30 dB Stereo Separation 22 dB gt Usable Sensitivity 6 uV 1300 uV m CASSETTE PLAYER Cassette Mechanism eee eee nennen nennen Auto Stop Tape Speed ci teet Ut ate etate taedio 17 s ips Wow and Flutter 1 2 ect dece dde dp E Ee c Le Ede L8 0
11. g the erase protection tabs does not prevent a bulk eraser from erasing a cassette tape Erasing a Cassette Tape If you no longer want a recording you can record over it or erase it To erase a previously recorded sec tion of a tape simply record over it To erase the entire cassette tape record silence by pressing TAPE and recording with no tape in TAPE 2 To quickly erase a tape use a bulk tape eraser such as Cat No 44 232 not supplied 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 for ward 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 13 SP Wi VJ 13 1287 fm Page 14 Wednesday July 14 1999 5 56 PM USING AN AUXILIARY AUDIO SOURCE If you connected an auxiliary audio source such as a TV VCR a CD player or an external cassette deck you can use your System 740 to listen to or record from that source See Connecting an Auxiliary Audio Source on Page 4 LISTENING TO AN AUXILIARY AUDIO SOURCE 1 T
12. ly releases PAUSE and dubbing begins from TAPE 2 to TAPE 1 Notes To skip an unwanted section during normal speed dubbing press PAUSE on TAPE 1 while the unwanted section plays To resume dubbing press PAUSE again To temporarily stop recording press PAUSE on both tape decks Press PAUSE again to resume recording To monitor the tape while it is dubbing adjust VOLUME to a comfortable listening level If you monitor the tape while high speed dubbing you hear a dis torted sound 7 Dubbing stops automatically when the cassette in TAPE 1 reaches its end If the cassette in TAPE 2 continues to play press STOP EJECT To stop dubbing before TAPE 1 stops automatically press STOP EJECT on both TAPE 1 and TAPE 2 SP Wi AZ 13 1287 fm Page 13 Wednesday July 14 1999 5 56 PM TAPE CARE TIPS Preventing Accidental Erasure Cassette tapes have two erase pro tection tabs one for each side 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 Illus If you want to record on a tape side af ter you have removed the erase pro tection tab place a piece of strong plastic tape over that side s erase pro tection hole Illus Notes Be sure you cover only the hole originally covered by the erase protection tab Removin
13. remely high volume levels Extended high volume listening can lead to per manent hearing loss 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 SP Wi VJ T 13 1287 fm Page 6 Wednesday July 14 1999 5 56 PM BASIC OPERATION A TURNING ON OFF THE SYSTEM Press POWER to turn on the system The POWER indicator lights Illus To turn off the system press POWER again The POWER indicator turns off ADJUSTING THE BALANCE To adjust the sound balance between the left and right speakers turn BAL ANCE toward L left or R right Illus USING THE FREQUENCY EQUALIZER You can use FREQUENCY EQUALIZER to customize the sound you hear through the speakers Each of the three controls lets you ad just the level in a specific frequency range Slide the control up to boost or down to reduce the level If you set the control to the center position 0 the frequency is unaltered Illus LOW 100 Hz Adjusts the frequen cies in the low bass range low organ notes and bass drums Reduces rum ble or other low frequency noise MID 1 kHz Adjusts the range of frequencies where the ear is most sensitive vocals HIGH 6 kHz Adjusts high frequency sounds cymbals flutes and violins SP Wi VJ 13
14. rmal temperature environments Temperature extremes can shorten the life of electronic devices and distort or melt plastic parts Handle the system gently and carefully Dropping it can damage the circuit boards and can cause the system to work improperly Keep the system away from dust and dirt which can cause prema ture wear of parts Wipe the system with a damp cloth occasionally to keep it looking new Do not use harsh chemicals cleaning solvents or strong deter gents to clean the system Modifying or tampering with the system s internal components can cause a mal function and might invalidate its warranty and void your FCC authorization to oper ate it If your system is not performing as it should take it to your local RadioShack store for assistance 15 SP Wi AZ 13 1287 fm Page 16 Wednesday July 14 1999 5 56 PM THE FCC WANTS YOU TO KNOW Your system might cause TV or radio interference even when it is operating properly To determine whether your system is causing the interference turn off your system If the interfer ence goes away your system is caus ing the interference Try to eliminate the interference by Moving your system away from the receiver Connecting your system to an out let that is on a different electrical circuit from the receiver Contacting your local RadioShack store for help If you cannot eliminate the interfer ence the FCC r
15. uly 14 1999 5 56 PM B CASSETTE PLAYER OPERATION T You can play a cassette tape in either play facing you the exposed tape cassette deck and record tapes in edge facing down and the full reel TAPE 1 to the left LOADING A CASSETTE TAPE Illus Note Take up any slack in the tape by turning the cassette s hub with a pencil If you do not remove excess slack the tape might become tangled in the record playback mechanism 3 Close the door Avoid touching the tape PLAYING A CASSETTE TAPE Normal Play Illus 1 Press TAPE The TAPE indicator lights 1 Press STOP EJECT to open the cassette compartment door Illus Illus 2 Load a cassette tape 2 Insert the cassette tape into the tape guides on the compartment door with the side you want to amp MB Zs AZ 13 1287 fm Page 10 Wednesday July 14 1999 5 56 PM 3 Press PLAY The tape player plays the cassette tape until it reaches the end then it automatically stops Illus Note Press PAUSE to tempo rarily stop the cassette player To resume play press PAUSE again 4 Adjust VOLUME E BASS BAL ANCE and FREQUENCY EQUAL IZER for the desired sound 5 To manually stop play press STOP EJECT Press STOP EJECT again to open the cassette com partment and remove the tape Fast Forward Rewind Press FAST F or REWIND to fast for ward or rewind the cassette To stop fast forward or rewind befor
16. urn VOLUME to MIN and be sure that the audio source s volume control if it has one is also set to its lowest level 2 Press AUX The AUX indicator lights Illus 3 Operate the audio source accord ing to its owner s manual 4 Adjust the System 740 s VOLUME E BASS BALANCE and FRE QUENCY EQUALIZER for the desired sound RECORDING FROM AN AUXILIARY AUDIO SOURCE 1 Turn VOLUME to MIN and be sure that the audio source s volume control if it has one is also set to its lowest level 2 Press AUX The AUX indicator lights 3 Insert a cassette tape into TAPE 1 4 Begin play on the audio source as instructed in its owner s manual 5 Press RECORD to begin record ing Note To pause the tape during recording press PAUSE To resume recording press PAUSE again 6 To stop the tape at any time dur ing recording press STOP EJECT 7 Stop play on the audio source as instructed in its owner s manual SP Wi NZ o 13 1287 fm Page 15 Wednesday July 14 1999 5 56 PM A CARE AND MAINTENANCE Your Optimus System 740 Mini Stereo Component System is an example of supe rior design and craftsmanship The following suggestions will help you care for the system so you can enjoy it for years y Keep the system dry If it gets wet wipe it dry immediately Liquids might contain minerals that can corrode the electronic circuits Lc Use and store the system only in no
17. y begin listening to your system Warning To prevent fire or shock hazard do not expose this product to rain or moisture RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICE ABLE PARTS INSIDE REFER SERVIC ING TO QUALIFIED PERSONNEL A This symbol is intended to alert you to the presence of uninsu lated dangerous voltage within the products enclosure that might be of sufficient magnitude to constitute a risk of electric shock Do not open the prod uct s case This symbol is intended to in form you that important operat ing and maintenance instruc tions are included in the litera ture accompanying this product N 1996 Tandy Corporation All Rights Reserved Optimus is a registered trademark used by Tandy Corporation RadioShack is a trademark used by Tandy Corporation SP Wi Sp S 13 1287 fm Page 3 Wednesday July 14 1999 5 56 PM CONTENTS ennnsppntgee e 4 Connecting the Speakers ete beet er ne e beet pee den 4 Connecting an Auxiliary Audio Source sse 4 Connecting an External Antenna eeeeeee eene eene 4 Gonnecting POW6T 2 1 gear ene R ERROR dO EOS ta UR 5 Using Headphones 22 nnne cene leiden teen 5 Listening Safely nissenana a ette e nerd ts 5 Basic Opera tion 5 cence ee
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