Optimus CD-3720 Owner's Manual
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Optimus CD-3720 Owner's Manual

Optimus CD-3720 Owner's Manual

Portable compact disc player with 10 second digital anti-shock system
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42-5077.fm Page 1 Thursday, August 12, 1999 1:12 PM
Cat. No. 42-5077
OWNER'S MANUAL
Please read before using this equipment.
CD-3720
Portable Compact Disc Player
with 10 Second Digital Anti-Shock System

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  • Page 1 42-5077.fm Page 1 Thursday, August 12, 1999 1:12 PM Cat. No. 42-5077 OWNER’S MANUAL Please read before using this equipment. CD-3720 Portable Compact Disc Player with 10 Second Digital Anti-Shock System...
  • Page 2 42-5077.fm Page 2 Thursday, August 12, 1999 1:12 PM FEATURES Your Optimus CD-3720 Portable Compact Disc Player uses the latest digital audio technology to give you the clear sound of compact discs. You can connect the CD player to your home audio or autosound system or connect a pair of stereo headphones for portable, private listening.
  • Page 3 42-5077.fm Page 3 Thursday, August 12, 1999 1:12 PM Built-In Battery Charger — recharges special rechargeable nickel- cadmium batteries inside the player when you use an AC or DC adapter. 1-Bit DAC — uses the latest in digital-to-analog conversion circuitry to accurately reproduce all sound levels with virtually no distortion.
  • Page 4 42-5077.fm Page 4 Thursday, August 12, 1999 1:12 PM Important: You need a pair of stereo headphones, amplified speakers, or a home audio or autosound system to use your CD player. Your local Ra- dioShack store carries a complete line of headphones, speakers, and au- dio systems.

  • Page 5: Fcc Information

    42-5077.fm Page 5 Thursday, August 12, 1999 1:12 PM FCC INFORMATION This equipment complies with the limits for a Class B digital device as specified in Part 15 of FCC Rules . These limits provide reasonable pro- tection against radio and TV interference in a residential area. However, your equipment might cause TV or radio interference even when it is op- erating properly.

  • Page 6: Table Of Contents

    42-5077.fm Page 6 Thursday, August 12, 1999 1:12 PM CONTENTS Powering the CD Player ..............8 Using Batteries ................8 Installing Batteries ..............9 Recharging Nickel-Cadmium Batteries ........10 Using AC Power ..............12 Using Vehicle Battery Power ........... 14 Connections ..................
  • Page 7 42-5077.fm Page 7 Thursday, August 12, 1999 1:12 PM Care and Maintenance ............... 32 CD Care Tips ................. 33 Specifications ..................35...

  • Page 8: Powering The Cd Player

    42-5077.fm Page 8 Thursday, August 12, 1999 1:12 PM POWERING THE CD PLAYER You can power your CD player from any of these sources: • two AA alkaline batteries • two special rechargeable AA nickel-cadmium batteries • two standard rechargeable AA nickel-cadmium batteries •...

  • Page 9: Installing Batteries

    42-5077.fm Page 9 Thursday, August 12, 1999 1:12 PM You cannot charge standard nickel-cadmium rechargeable batteries inside the CD player’s battery compartment, but you can charge them using an external battery charger such as Cat. No. 23-133 (not sup- plied). Note: All types of nickel-cadmium batteries come fully discharged.

  • Page 10: Recharging Nickel-Cadmium Batteries

    42-5077.fm Page 10 Thursday, August 12, 1999 1:12 PM 2. Place two AA batteries in the compartment and on top of the attached ribbon, as indicated by the polarity symbols (+ and –) marked inside. 3. Close the cover. When flashes, the sound distorts, or the volume weakens, replace BATT or recharge the batteries.
  • Page 11 42-5077.fm Page 11 Thursday, August 12, 1999 1:12 PM To charge special nickel-cadmium batteries in the CD player, simply con- nect an AC or DC adapter to your CD player (see “Using AC Power” on Page 12 or “Using Vehicle Battery Power” on Page 14). BATT CHARGE on the front of the CD player lights while batteries are installed and charg- ing.

  • Page 12: Using Ac Power

    42-5077.fm Page 12 Thursday, August 12, 1999 1:12 PM • Fully discharge the batteries occasionally by playing the CD player until it no longer plays. Then fully recharge the batteries. This helps maintain the batteries’ full charging capacity. • Important: This CD player is capable of using rechargeable nickel- cadmium batteries.
  • Page 13 42-5077.fm Page 13 Thursday, August 12, 1999 1:12 PM Follow these steps to connect an AC adapter to the CD player. 4.5V 1. Plug the AC adapter’s 5.5 mm outer diameter/2.1 mm inner diameter barrel plug into the cable so it reads + TIP. 2.

  • Page 14: Using Vehicle Battery Power

    42-5077.fm Page 14 Thursday, August 12, 1999 1:12 PM Using Vehicle Battery Power You can power your CD player from your vehicle’s cigarette-lighter socket using an optional 4.5 volt DC adapter, such as Cat. No. 273-1801. Cautions: • You must use a DC adapter that supplies 4.5 volts and delivers at least 550 mA of automotive power.
  • Page 15 42-5077.fm Page 15 Thursday, August 12, 1999 1:12 PM 2. Set the DC adapter’s voltage switch to 4.5 volts. 3. Connect the DC adapter’s barrel plug to the jack on the back of 4.5V the CD player. 4. Plug the DC adapter’s other end into your vehicle’s cigarette-lighter socket.

  • Page 16: Connections

    42-5077.fm Page 16 Thursday, August 12, 1999 1:12 PM CONNECTIONS You can listen to your CD player by connecting optional stereo head- phones or amplified speakers to the CD player’s jack, or by con- PHONES necting a home audio or autosound system to the CD player’s LINE OUT jack.

  • Page 17: Listening Safely

    42-5077.fm Page 17 Thursday, August 12, 1999 1:12 PM Listening Safely To protect your hearing, follow these guidelines when you use earphones or headphones. • Set the volume to the lowest setting before you begin listening. After you begin listening, adjust the volume to a comfortable level. •...

  • Page 18: Connecting Amplified Speakers

    42-5077.fm Page 18 Thursday, August 12, 1999 1:12 PM CONNECTING AMPLIFIED SPEAKERS You can listen to your CD player through optional amplified speakers (such as Cat. No. 40-1387). Plug the speaker cable’s -inch (3.5-mm) plug into the CD player’s jack. PHONES CONNECTING TO A HOME AUDIO SYSTEM You can listen to your CD player through your home audio system’s am-...

  • Page 19: Connecting To An Autosound System

    42-5077.fm Page 19 Thursday, August 12, 1999 1:12 PM CONNECTING TO AN AUTOSOUND SYSTEM You can listen to your CD player through your autosound system in one of the following ways: • If your autosound system has LINE IN jacks, connect the supplied Y- cable’s -inch (3.5-mm) plug to the CD player’s jack.
  • Page 20 42-5077.fm Page 20 Thursday, August 12, 1999 1:12 PM • If your autosound system has a cassette deck, connect an optional CD-to-cassette adapter’s plug (such as Cat. No. 12-1951) to the CD player’s jack. Then insert the adapter’s other end into your PHONES cassette deck just like a standard cassette.

  • Page 21: Operation

    42-5077.fm Page 21 Thursday, August 12, 1999 1:12 PM OPERATION LOADING A CD Caution: To help prevent dust from entering the CD player, always keep the CD compartment cover closed except to load or unload CDs. 1. Slide in the direction of the arrow marked next to HOLD HOLD 2.

  • Page 22: Playing A Cd

    42-5077.fm Page 22 Thursday, August 12, 1999 1:12 PM PLAYING A CD Warning: To protect your hearing if you are using earphones or head- phones, set to its lowest setting before you play a CD. VOLUME Press . The CD player automatically turns on and PLAY/PAUSE the total number of tracks on the CD, and the CD’s playing time briefly ap- pear on the display.

  • Page 23: Turning E-Bass On And Off

    42-5077.fm Page 23 Thursday, August 12, 1999 1:12 PM To temporarily stop play, press . The current track’s PLAY/PAUSE elapsed time flashes. To resume play, press again. PLAY/PAUSE When the last track finishes playing, the CD stops and appears for a few seconds.

  • Page 24: Digital Anti-Shock System

    42-5077.fm Page 24 Thursday, August 12, 1999 1:12 PM DIGITAL ANTI-SHOCK SYSTEM Your CD player contains special circuits to overcome sound skipping problems caused by shock or vibration. This means you can carry the CD player anywhere you go or use it in your vehicle. When you turn on the anti-shock system, the CD player continuously saves 10 seconds of mu- sic in memory.

  • Page 25: Locking The Controls

    42-5077.fm Page 25 Thursday, August 12, 1999 1:12 PM Note: The CD player consumes extra battery power when you use the anti-shock system. When you use the CD player in a stable location, re- peatedly press until the icon disappears to conserve battery power. LOCKING THE CONTROLS To protect your CD player from accidental program changes, slide HOLD...

  • Page 26: Audible Search

    42-5077.fm Page 26 Thursday, August 12, 1999 1:12 PM During play, press to return to the beginning of the current track. Press twice to return to the beginning of the previous track, then re- peatedly press to move through the previous tracks or to move through the next tracks.

  • Page 27: Repeat Play

    42-5077.fm Page 27 Thursday, August 12, 1999 1:12 PM To begin scanning, press Intr appears. Then press PLAY MODE PLAY/ . The first track number and appear and intro scan PAUSE --:00 starts from the first track on the CD. To return to normal play, press .

  • Page 28: Random Play

    42-5077.fm Page 28 Thursday, August 12, 1999 1:12 PM To repeat all tracks on a CD, repeatedly press until REPEAT/ENTER appears. The CD player continuously replays the CD. PEAT To cancel repeat play, press until disappears. REPEAT/ENTER REPEAT RANDOM PLAY In random play, the CD player plays all the tracks once in random order, then automatically stops.

  • Page 29: Programmed Play

    42-5077.fm Page 29 Thursday, August 12, 1999 1:12 PM PROGRAMMED PLAY You can program up to 22 tracks on a CD to play in any order you choose, and you can program the same track to play more than once. Follow these steps to program and play a sequence.

  • Page 30: Troubleshooting

    42-5077.fm Page 30 Thursday, August 12, 1999 1:12 PM TROUBLESHOOTING If your CD player is not working properly, follow these suggestions to see if you can eliminate the problem. If these suggestions do not work, con- tact your local RadioShack store for assistance. Problem Possible Cause Suggestion...
  • Page 31 42-5077.fm Page 31 Thursday, August 12, 1999 1:12 PM Problem Possible Cause Suggestion Sound from a CD Moisture has condensed Wait 1 hour for the mois- skips (continued) on the pickup lens. ture to evaporate.

  • Page 32: Care And Maintenance

    42-5077.fm Page 32 Thursday, August 12, 1999 1:12 PM CARE AND MAINTENANCE Your Optimus CD-3720 Portable Compact Disc Player is an example of superior design and craftsmanship. The following suggestions will help you care for your CD player so you can enjoy it for years.

  • Page 33: Cd Care Tips

    42-5077.fm Page 33 Thursday, August 12, 1999 1:12 PM Wipe the CD player with a damp cloth occasionally to keep it looking new. Do not use harsh chemicals, cleaning sol- vents, or strong detergents to clean the CD player. Always keep the charging terminals on the rechargeable batteries clean.
  • Page 34 42-5077.fm Page 34 Thursday, August 12, 1999 1:12 PM information. To clean the CD, use a CD cleaner kit (such as Cat. No. 42-226). • Keep CDs dry. A water drop can act as a lens and affect the laser beam focus.

  • Page 35: Specifications

    42-5077.fm Page 35 Thursday, August 12, 1999 1:12 PM SPECIFICATIONS Frequency Response (±3 dB) ..........20–20,000 Hz Line Output ..................0.6 V Sampling Frequency ..............44.1 kHz Oversampling ................4 Times Wavelength ................... 780 nm General Power Requirements ......... DC 3V; Two AA Size Alkaline or Special Rechargeable Nickel-Cadmium Batteries (Not Supplied), Optional AC Adapter (273-1664), or Optional DC Adapter (273-1801)
  • Page 36 42-5077.fm Page 36 Thursday, August 12, 1999 1:12 PM Limited One-Year Warranty This product is warranted by RadioShack against manufacturing defects in material and workman- ship under normal use for one (1) year from the date of purchase from RadioShack company- owned stores and authorized RadioShack franchisees and dealers.

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