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.
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.
42-5077.fm Page 3 Thursday, August 12, 1999 1:12 PM Built-In Battery Charger — recharges special rechargeable nickelcadmium 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. Automatic Search Music System (ASMS) — lets you quickly locate and play any track on a CD.
2-5077.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 RadioShack store carries a complete line of headphones, speakers, and audio systems. CDs that can be played on this CD player have this mark on them: We recommend you record your CD player’s serial number here. The number is inside the battery compartment.
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 protection against radio and TV interference in a residential area. However, your equipment might cause TV or radio interference even when it is operating properly. To eliminate interference, you can try one or more of the following corrective measures: • Reorient or relocate the receiving antenna.
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 ......................................................................
42-5077.fm Page 7 Thursday, August 12, 1999 1:12 PM Care and Maintenance ....................................................................... 32 CD Care Tips ................................................................................. 33 Specifications ....................................................................................
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 • vehicle battery power using an optional DC adapter • standard AC power using an optional AC adapter Note: Connecting an AC or DC adapter to the CD player when nonrechargeable batteries are installed disconnects the 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 supplied). Note: All types of nickel-cadmium batteries come fully discharged. Be sure to fully charge the batteries before you use them the first time. Installing Batteries Cautions: • Use only fresh batteries of the required size and recommended type.
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 BATT flashes, the sound distorts, or the volume weakens, replace or recharge the batteries. Cautions: • Dispose of old batteries promptly and properly. Do not burn or bury them. • Always remove or recharge old or weak batteries.
42-5077.fm Page 11 Thursday, August 12, 1999 1:12 PM To charge special nickel-cadmium batteries in the CD player, simply connect 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 charging. 4.5V A 550m 4.5V 6V When the batteries are fully charged, disconnect the AC or DC adapter.
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 nickelcadmium batteries. At the end of the batteries’ useful life, they must be recycled or disposed of properly.
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 A 550m 4.5V 6V 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. Set the AC adapter’s voltage switch to 4.5V. 3. Connect the AC adapter’s barrel plug to the 4.5V jack on the back of the CD player. 4. Plug the AC adapter’s other end into a standard AC outlet.
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. Its center tip must be set to positive and its plug must fit the CD player’s 4.5V jack.
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 4.5V jack on the back of the CD player. 4. Plug the DC adapter’s other end into your vehicle’s cigarette-lighter socket. Note: If the CD player does not operate when you use the DC adapter, unplug the cord from the cigarette-lighter socket and clean any ashes or debris from the socket.
42-5077.fm Page 16 Thursday, August 12, 1999 1:12 PM CONNECTIONS You can listen to your CD player by connecting optional stereo headphones or amplified speakers to the CD player’s PHONES jack, or by connecting a home audio or autosound system to the CD player’s LINE OUT jack. Note: If the jacks on your equipment do not match the plugs on the supplied Y-cable, check with your local RadioShack store for the proper cable adapter. You can mount your CD player in your car using a mounting bracket.
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. • Do not listen at extremely high volume levels. Extended high-volume listening can lead to permanent hearing loss. • Once you set the volume, do not increase it.
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 1/8-inch (3.5-mm) plug into the CD player’s PHONES jack. CONNECTING TO A HOME AUDIO SYSTEM You can listen to your CD player through your home audio system’s amplifier/receiver and full-size speakers. Connect the supplied Y-cable’s 1/8inch (3.5-mm) plug to the CD player’s LINE OUT jack.
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 Ycable’s 1/8-inch (3.5-mm) plug to the CD player’s LINE OUT jack. Then connect the Y-cable’s phono plugs to your autosound system’s LINE IN input jacks. • If your autosound system has a CD input jack, connect one end of a 1/8-inch (3.
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 PHONES jack. Then insert the adapter’s other end into your cassette deck just like a standard cassette.
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 HOLD in the direction of the arrow marked next to HOLD. 2. Press PUSH OPEN and lift the CD compartment cover. 3. Carefully place a CD, label side up, over the center hub inside the CD compartment, and gently press the center of the CD until it snaps down onto the hub. 4.
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 headphones, set VOLUME to its lowest setting before you play a CD. Press PLAY/PAUSE . The CD player automatically turns on and 00, the total number of tracks on the CD, and the CD’s playing time briefly appear on the display. Then the current track number and the elapsed time of the current track appear, and Track 1 begins to play.
42-5077.fm Page 23 Thursday, August 12, 1999 1:12 PM To temporarily stop play, press PLAY/PAUSE . The current track’s elapsed time flashes. To resume play, press PLAY/PAUSE again. When the last track finishes playing, the CD stops and 00 appears for a few seconds. Then the CD player automatically turns off. To turn it off sooner, press STOP. TURNING E-BASS ON AND OFF To enhance the bass sound, slide E-BASS to ON. To turn bass enhancement off, slide E-BASS to OFF.
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 music in memory. During a shock or vibration that would normally make a track skip or pause, the CD player plays directly from memory.
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, repeatedly press DAS until the icon disappears to conserve battery power. LOCKING THE CONTROLS To protect your CD player from accidental program changes, slide HOLD in the direction of the arrow marked next to HOLD to lock all controls except PUSH OPEN, VOLUME (and HOLD itself).
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 repeatedly press to move through the previous tracks or to move through the next tracks. To move to the beginning of the next track, press . AUDIBLE SEARCH . The To search forward or backward during play, hold down or CD plays rapidly and you hear the music at a high speed and low volume.
42-5077.fm Page 27 Thursday, August 12, 1999 1:12 PM To begin scanning, press PLAY MODE. Intr appears. Then press PLAY/ . The first track number and --:00 appear and intro scan PAUSE starts from the first track on the CD. To return to normal play, press PLAY/PAUSE elapsed time appears. . The current track’s Notes: • Intro scan plays the tracks in the programmed order if you have programmed a sequence (see “Programmed Play” on Page 29). • You can use scan.
42-5077.fm Page 28 Thursday, August 12, 1999 1:12 PM To repeat all tracks on a CD, repeatedly press REPEAT/ENTER until REPEAT appears. The CD player continuously replays the CD. To cancel repeat play, press REPEAT/ENTER until REPEAT disappears. RANDOM PLAY In random play, the CD player plays all the tracks once in random order, then automatically stops. To start random play at any time, repeatedly press PLAY MODE until RND appears.
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. 1. Press PLAY/PAUSE to turn on the CD player. 2. Press PLAY MODE twice. PGM flashes. 3. Repeatedly press you want to program. or to display the number of the first track 4.
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, contact your local RadioShack store for assistance. Problem Possible Cause Suggestion HOLD is set in the direction of the arrow. Slide HOLD in the opposite direction. No power. Be sure the batteries are not weak, or make sure an AC adapter or DC adapter is properly connected.
42-5077.fm Page 31 Thursday, August 12, 1999 1:12 PM Problem Possible Cause Suggestion Sound from a CD skips (continued) Moisture has condensed on the pickup lens. Wait 1 hour for the moisture to evaporate.
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. Keep the CD player dry. If it gets wet, wipe it dry immediately. Liquids might contain minerals that can corrode the electronic circuits. Use and store the CD player only in normal temperature environments.
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 solvents, or strong detergents to clean the CD player. Always keep the charging terminals on the rechargeable batteries clean. Use a cotton swab dipped in alcohol to clean the terminals. Modifying or tampering with the CD player’s internal components can cause a malfunction and might invalidate its warranty.
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.
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 ..............................................
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 workmanship under normal use for one (1) year from the date of purchase from RadioShack companyowned stores and authorized RadioShack franchisees and dealers.