CQR253U - Car stereo PANASONIC - Free user manual and instructions

USER MANUAL CQR253U PANASONIC

• Please read these instructions carefully before using this product and save this manual for future use.

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PWR Power Turn the key in the ignition until the accessory indicator lights. Power on: Press [PWR] (power). Power off: Press [PWR] (power) again. ACC

Volume level (0 to 40) Volume Turn the knob clockwise to increase volume, and counterclockwise to decrease volume. Mute Press [MUTE] to mute the sound completely. Press [MUTE] again to cancel. Loudness Press and hold for more than 2 seconds [MUTE] (LOUD) to enhance bass and treble tones at low or medium volume. Press and hold for more than 2 seconds [MUTE] (LOUD) again to cancel.

Down [DISP] (display) MUTE indicator Loudness indicator Remote control sensor (REMOTE) (➡ page 18) Clock Setting Note: If no operation takes place for more than 5 seconds in audio mode (2 seconds in volume mode), the display returns to the regular mode.

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TRACK TUNE Audio Mode (Bass/Treble/Balance/Fader) The 12-hour system is used for the clock. Push [SEL] to select the audio mode. Volume Bass Treble BalanceFader [] TUNE], [[ TUNE] (Hours, minutes) Hours w Press and hold [DISP] (clock) for more than 2 seconds. Initial Time q Press [DISP] (clock). (Hours blink.) e Press [] TUNE] or [[ TUNE]. (Hours set.) Minutes r Press [DISP] (clock). (Minutes blink.) t Press [] TUNE] or [[ TUNE]. (Minutes set.) y Press [DISP] (clock). Note: Press and hold [] TUNE] or [[ TUNE] to change numbers rapidly. Time Reset Press and hold [DISP] (clock) for more than 2 seconds to activate the time setting mode to reset the time. Then, repeat steps to . (End.) “AdJ” is displayed when the clock is not adjusted. Turn [VOL] clockwise or counterclockwise to change each level. Bass: Adjustable range: –12 to +12 dB (by 3 dB step) Treble: Adjustable range: –12 to +12 dB (by 3 dB step) Balance: Adjustable range: 1 to 15 (by 1 dB step) Balance center (default) R (right speaker) or L (left speaker) Fader: Adjustable range: 1 to 15 (by 1 dB step) Fader center (default) F (front speaker) or R (rear speaker) push

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Band Press [BAND] to change the band.

Manual Tuning [[ TUNE]: Higher frequency [] TUNE]: Lower frequency Seek Tuning Press and hold for more than 0.5 second. [[ TUNE]: Higher frequency [] TUNE]: Lower frequency Tuning will automatically stop when the signals of the next broadcast station are received.

Mono Selection Press [MONO] for monaural reception in case a lot of interference is present in an FM stereo signal or to improve the listening quality of weak FM broadcasts. Press [MONO] again to cancel.

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Preset buttons from [1] to [6] Display Change Press [DISP] (display) to switch to the clock display. Preset Station Setting Up to 6 stations can be saved in each of the FM1, FM2, FM3 and AM preset station memories. Note: Existing saved stations are overwritten with new stations after following this procedure. Band Press [BAND] to select a desired band. (➡ page 12) Auto Preset Memory (APM) Press and hold [BAND] (APM: auto preset memory) for more than 2 seconds.

• The 6 stations with good reception will be automatically saved in the memory under preset buttons from [1] to [6].

• Once set, the preset stations are sequentially scanned for 5 seconds each. Manual Preset Memory

Use manual or seek tuning to find a station. (➡ page 12)

Press and hold one of the preset buttons from [1] to [6] until the display blinks once.

Caution: To ensure safety, never attempt to preset stations while you are driving. Preset Station Calling Press the corresponding preset button from [1] to [6] to tune in a preset station. Frequency Clock display blinks once

preset number Radio TAPE (When a Tape is inserted) CD Changer Control (When a CD changer is connected) Radio mode Press [MODE] to switch the operation mode as follows:E

Cassette Tape Player

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TRACK TUNE Loading a Cassette Insert the cassette with the exposed tape side facing to the right. Gently push the cassette in until the loading begins. The cassette will be loaded in place and playback starts. Ejecting the Tape Press [u] and the cassette will eject for removal, and the previous mode of operation will be resumed. Notes:

• If power is switched off before [u] is pressed, the cassette will not eject. Switch on the power again and press [u] to eject the cassette.

• The cassette tape should always be removed from the cassette slot when not in use. Play Side Change Press [] to switch to the program on the other side of the tape. The display changes to indicate which program is playing. Rewind and Fast Forward Pressor [6 TRACK] to [7 TRACK] activate rewind or fast forward of the tape. Program Indicator (This indication “” rotates.) TE MONO

Exposed Tape end Top Side Playing Bottom Side Playing Press [] to stop rewind or fast forward. If you rewind the tape fully, it will play on the same program side again. If you fast forward to the end, play will resume from the beginning of the other side of the tape. Metal Tape Mode Press [1] (MTL) when playing metal or chromium dioxide (CrO

Press [1] (MTL) again to cancel. Blank Skip Press [5] (B•S) to skip unrecorded portions longer than 15 seconds on the tape. Press [5] (B•S) again to cancel. Note: When repeat is on, the blank skip does not work because the repeat has priority over the blank skip. Dolby B Noise Reduction Press [2] (NR) to set the Dolby B NR mode. Press [2] (NR) again to cancel. Note: Set the Dolby B NR mode when playing back a tape recorded with Dolby B Noise Reduction. Note: Playing normal tapes in metal tape mode mode causes high frequency imbalance, which affects tone quality. Repeat Play Press [4] (REP) to repeat the current program. Press [4] (REP) again to cancel. Tape Program Search (TPS) Operation Press [3] (TPS) to activate the tape program search mode. To select a desired program, press [7 TRACK] or [6 TRACK] corresponding times to go forward (up to 9) or backward (up to 8). To turn it off, press [3] (TPS) again. (Rewind:)

Note: The TPS and B•S mode may not work correctly in the following cases. This, however, does not mean that the unit is defective.

• There is an interval less than 3 (15 in B•S mode) seconds or having a high level of noise or hum between programs.

• There is particularly low-level passage during the program. Note: To maintain your cassette player in top condition, avoid using tapes that are longer than 90 minutes (C-90). Notes on Cassette Tapes Tape Slack: Use a pencil or similar object to take up the slack as shown. If a loose tape is used, this may result in the tape becoming tangled in the rotating parts of the unit. Do not touch or pull out the tape. Pencil Exposed end (Open end) blinks Display Change Press [DISP] (display) to switch to the clock display. Tape Clock display Caution: Do not insert a tape when “tape” indicator “” or “” lights.E

CD Changer Control CD Changer mode While a disc magazine is inserted in the CD changer, press [MODE]. Play starts from the first track. Disc Selection [1] (

DISC): Previous disc. [2] (

DISC): Next disc. Note: The cassette, if loaded, should be removed. Otherwise, the CD play will not start. Display change Press [DISP] (display) to switch to the clock display.

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TRACK TUNE Track Selection Press [TRACK 7] once to go to the next track. Press repeatedly to step forward through all the tracks. Press [TRACK 6] once to play from the beginning of the current track, Press twice to play the previous track. Press repeatedly to step backward through all the tracks. Track Search Press and hold [TRACK 7] or [TRACK 6] for more than

0.5 second to activate fast forward or reverse through a

track. Release it to resume the normal CD play from that position.

CD Changer display Clock display Playing Time Disc Number Track Number Disc is dirty, or is upside down. ➡ Select the next available compact disc. Check the disc. Disc has scratches. ➡ Select the next available compact disc. Check the disc. No operation by some cause. ➡ Eject the magazine. If failure persists, press the reset switch on the CD changer. If normal operation is not restored yet, call the store where you purchased the unit. No disc in the changer (magazine) ➡ Insert discs into the changer (magazine). Error Display Messages Scan Play (Tracks)

• Press [3] (SCAN). The track number blinks and the first 10 seconds of each track on the discs play in sequence.

• Press [3] (SCAN) again to cancel and continue with the current track. Scan Play (Discs)

• Press and hold [3] (SCAN) for more than 2 seconds. The first track of all the discs in the magazine is played for 10 seconds each and Disc Number blinks.

• Press and hold [3] (SCAN) for more than 2seconds again to cancel. Repeat Play

• Press [4] (REPEAT) to repeat the current selection.

• Press [4] (REPEAT) again to cancel. Repeat Play (Discs)

• Press and hold [4] (REPEAT) for more than 2 seconds to repeat the current Disc. “REP/DISC” indicator lights.

• To cancel, press [4] (REPEAT) for more than 2 secords again. lights REP: Repeat Indicator lights REP/DISC: Repeat DISC Indicator blinks blinks Note: CD changer functions are applicable to units with optional CD changer unit. (sold separately) Random Play

• Press [5] (RANDOM) to random selection of music is played from all available CDs.

• Press [5] (RANDOM) again to cancel. Random Play (Discs)

• Press and hold [5] (RANDOM) for more than 2 seconds to random selection of music is played from the current Disc. “R/DISC” indicator lights.

• To cancel, press [5] (RANDOM) for more than 2 seconds again. lights when a CD changer is connected R 5 : Random indicator R 5/DISC: Random DISC indicator lights lights DISC NO DISC NOE

Preliminary Steps Check and take steps as described in the tables below. If You Suspect Something Wrong Immediately switch the power off.Disconnect the power connector and check that there is neithersmoke nor heat from the unit before asking for repairs. Never tryto repair the unit by yourself because it is dangerous to do so.No power.TroubleCar’s engine switch is not on. ➡Turn your car’s ignition switch to ACC or ON. Cables are not correctly connected. ➡Connect cables correctly.Battery cable is not correctly connected. ➡Connect the battery cable to the terminal that is always active.Accessory cable is not correctly connected. ➡Connect the accessory cable to your car’s ACC source. Grounding wire is not correctly connected. ➡Connect the grounding wire to a metal part of the car.Fuse is burnt.➡Consult the store where you purchased the unit and ask for fusereplacement.Caution:• Do not use the unit if it malfunctions or ifthere is something wrong.• Do not use the unit in irregular condition, forexample, without sound, or with smoke orfoul smell, which can cause ignition or electricshock. Immediately stop using it and call thestore where you purchased it.Cause/Step Troubleshooting Tips ❐ Common No sound.Mute is set to ON.➡Set it to OFF.Noise.The ground Lead is not connected properly.➡Connect the Ground Lead properly.Cables are not correctly connected.➡Connect cables correctly. Remote Control

Remove the battery holder. Press and position A of the battery holder and then pull it out.

Install the battery on the battery holder. Place a battery in the holder with its “+” side facing up as shown in the figure.

Insert the battery holder. Push the battery holder back into its original position. Battery Notes Remove and dispose of an old battery immediately.Battery Information:• Battery type: Panasonic lithium battery (CR2025) (included)• Battery life: Approximately 6 months with normal use (at room temperature)Caution:

• Improper use of batteries may cause overheating, an explosion or ignition, resulting in injury or a fire. Battery leakage may damage the unit. PWR MODE PRG TUNE TRACK Car Audio

VOL MUTE (ATT) [PWR] (power)[MODE] (Mode)(➡ page 12, 16)• Do not disassemble or short the battery. Do not throw a battery into a fire.• Keep batteries away from children to avoid the risk of accidents.• Be careful to observe proper local disposal rules when you dispose of batteries. Control Reference Guide Buttons of the remote control function in the same way as the controls on the main unit of the reference page. Point the remote control unit at the main unit’s sensor (REMOTE). [MUTE] (Mute)(➡ page 10) [VOL][}][{] (Volume) (➡ page 10) [TUNE][TRACK] [] [] []] [[] (Tune/track, selection/search/Fastforward/Fast rererse)(➡ page 12, 14, 16)[BAND] [DISC UP](Band/Disc change/playside change)(➡ page 12, 14, 16)TroubleMuch noise in FM stereoand monauralbroadcasts.The Antenna ground earth is not connected properly.➡Connect the Antenna ground earth properly.Preset station is reset.Battery cable is not correctly connected.➡Connect the battery cable to the terminal that is always active.The radio antenna is not extended enough.➡Extend fully the radio antenna.Cause/Step ❐ Radio

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TroubleNo sound.Blank tape is inserted in the unit.➡Insert recorded tape into the unit.Tape sound quality ispoor.Heads are dirty.➡Clean heads. (Ask a service representative for advice.)Poor quality tape.➡Use better quality tape.High tones areimproperly emphasized.Dolby B NR tape plays with Dolby B NR off.➡Set Dolby B NR to ON.Metal type tape plays with normal mode.➡Change Normal mode to Metal mode.Reproduction of hightones is poor.Non-Dolby B NR tape plays with Dolby B NR on.➡Set Dolby B NR to OFF.Normal type tape plays with Metal mode.➡Change Metal mode to Normal mode.Heads are magnetized.➡Demagnetize heads. (Ask a service representative for advice.)Wow and flutter level isvery high.Tape running mechanism is dirty or out of order.➡Clean tape running mechanism, or repair it. (Ask a servicerepresentative for advice.)Cause/Step ❐ Cassette Tape TroubleNo sound from left,right, front, or rearspeakers.Left and right balance, or front and rear balance is off on one side.➡Adjust balance/fader setting as appropriate.Cables are not correctly connected.➡Connect the cables correctly.The right speaker wire is connected to the left speaker and the left speakerwire to the right speaker.➡Connect the speaker wires to the correct one.Left and right sounds arereversed in stereolistening.Cause/Step ❐ Sound Setting TroubleButtons are invalid foroperation.Battery poles (+) (–) are reversed.➡Insert the battery correctly.Wrong battery.➡Check the battery.Battery has run down.➡Replace the battery.Remote control is in the wrong direction.➡Direct the remote control at sensor (REMOTE) on the panel.Cause/Step ❐ Remote Control Unit Speaker Connections Caution: Please follow the instructions given below. Failure to do so will cause damage to the unit and speakers.

<Right> <Wrong> (White) (White w/black stripe) Chassis (Gray w/black stripe) (Gray) Chassis

• Use ungrounded speaker only.• The maximum speaker input should be 50 W or more. (If used with the optionalpower amplifier, the speaker input should be higher than the maximum amplifieroutput.)
• The speaker impedance should be 4 - 8 Ω.
• This unit uses the BTCL circuit, so each speaker should be connected separatelyusing parallel vinyl insulated cords.• The speaker cords and the power amplifier unit should be kept away (about 30 cmapart) from the antenna and antenna extension cord.• Never connect the speaker cord tothe body of the car.• Do not use a 3-wire type speakersystem having a common earthlead.• Do not connect more than onespeaker to one set of speakerleads. Fuse Use fuses of the same specified rating (15 A). Using different substitutes or fuses with higher ratings, or connecting the unit directly without a fuse, could cause fire or damage to the unit.If the fuse replacement fails, contact your nearest authorized Panasonic Service Center. Product Servicing If the suggestions in the charts do not solve the problem, we recommend that you take it to your nearest authorizedPanasonic Servicenter. The product should be serviced only by a qualified technician. Maintenance Your product is designed and manufactured to ensure the minimum of maintenance. Use a soft cloth for routineexterior cleaning. Never use benzine, thinner, or other solvents.E

WARNING This installation information is designed for experienced installers and is not intended for non-technical individuals. It does not contain warnings or cautions of potential dangers involved in attempting to install this product. Any attempt to install this product in a motor car by anyone other than qualified installer could cause damage to the electrical system and could result in serious personal injury or death. ❏ Installation Hardware ❏ Overview This product should be installed by a professional.However, if you plan to install this product yourself,your first step is to decide where to install it. Theinstructions in these pages will guide you through theremaining steps: (Please refer to the “WARNING” statement above.)

• Identify and label the car wires.• Connect the car wires to the wires of the powerconnector.• Install the unit in the dashboard.• Check the operation of the unit.If you encounter problems, please consult your nearestprofessional installer.Before you begin installation, look for the items whichare packed with your unit.
• Warranty Card…Fill this out promptly.
• Panasonic Servicenter List for Service Directory…Keep for future reference in case the productneeds servicing.
• Installation Hardware…Needed for in-dash installation. ❏ Required Tools You’ll need a screwdriver, a 1.5 V AA battery, and thefollowing:Caution:• This unit operates with a 12 V DC negative groundauto battery system only. Do not attempt to use itin any other system. Doing so could causeserious damage.12 V DCTest bulbElectrical tape Side-cut pliers ❏ Identify All Leads The first step in installation is to identify all the carwires you’ll use when hooking up your sound system.As you identify each wire, we suggest that you label itusing masking tape and a permanent marker. This willhelp avoid confusion when making connections later.Note: Do not connect the power connector to thestereo unit until you have made all connections. If thereare no plastic caps on the stereo hooking wires, insulateall exposed leads with electrical tape until you are readyto use them. Identify the leads in the following order.Power LeadIf your car has a radio or is pre-wired for one: Cut the connector wires one at a time from the plug(leaving the leads as long as possible) so that you canwork with individual leads.Turn the ignition on to the accessory position, andground one lead of the test bulb to the chassis. Touch the other lead of the test bulb to each of theexposed wires from the cut radio connector plug. Touchone wire at a time until you find the outlet that causesthe test bulb to light.Now turn the ignition off and then on. If the bulb alsoturns off and on, that outlet is the car power lead.If your car is not wired for an audio unit: Go to the fuse block and find the fuse port for radio(RADIO), accessory (ACC), or ignition (IGN).Battery LeadIf your stereo unit has a yellow lead, you will need to locate the car’s battery lead. Otherwise you may ignore this procedure. (The yellow battery lead providescontinuous power to maintain a clock, memory storage,or other function.)If your car has a radio or is pre-wired for one: With the ignition and headlights off, identify the carbattery lead by grounding one lead of the test bulb tothe chassis and checking the remaining exposed wiresfrom the cut radio connector plug.If your car is not wired for an audio unit: Go to the fuse block and find the fuse port for thebattery, usually marked BAT.SpeakersIdentify the car speaker leads. There are two leads foreach speaker which are usually color coded.A handy way to identify the speaker leads and thespeaker they are connected with is to test the leadsusing a 1.5 V AA battery as follows.Hold one lead against one pole of the battery and strokethe other lead across the other pole. You will hear ascraping sound in one of the speakers if you are holdinga speaker lead.If not, keep testing different lead combinations until youhave located all the speaker leads. When you label them,include the speaker location for each.AntennaThe antenna lead is a thick, black wire with a metal plugat the end. ❏ Connect All Leads Now that you have identified all the wires in the car, youare ready to begin connecting them to the stereo unitwires. The wiring diagram (➡ page 28) shows theproper connections and color coding of the leads.We strongly recommend that you test the unit beforemaking a final installation.You can set the unit on the floor and make temporaryconnections to test the unit. Use electrical tape to coverall exposed wires.GroundConnect the black ground lead of the power connectorto the metal car chassis.Important: Connect the red power lead last, afteryou have made and insulated all other connections. Q’tyItemNo. Diagram

Mounting collarHex. nut (5 mmø)Rear support strapTapping screw(5 mmø × 16 mm)Mounting bolt (5 mmø)Power connectorDismounting plateTrim plate

Installation Guide (Continued) CQ-R253U

Less than 30˚ (182 mm)(53 mm)

SpeakersConnect the speaker wires. See the wiring diagram (➡page 28) for the proper hookups. Follow the diagramcarefully to avoid damaging the speakers and the stereounit.The speakers used must be able to handle more than 50W of audio power. If using an optional audio amplifier,the speakers should be able to handle the maximumamplifier output power. Speakers with low input ratingscan be damaged. Speaker impedance should measure 4–8 Ω, which is typically marked on most speakers. Lower or higher impedance speakers will affect outputand can cause both speaker and stereo unit damage.BatteryConnect the yellow battery lead to the correct radio wireor to the battery fuse port on the fuse block.AntennaConnect the antenna by plugging the antenna lead intothe antenna receptacle.EquipmentConnect any optional equipment such as an amplifier,according to the instructions furnished with theequipment. Leave about 12" (30 cm) of distancebetween the speaker leads/amplifier unit and theantenna/antenna extension cord. Read the operating andinstallation instructions of any equipment you willconnect to this unit.Power Connect the red power lead to the correct car radio wireor to the appropriate fuse port on the fuse block.If the stereo unit functions properly with all theseconnections made, disconnect the wires and proceed tothe final installation. ❐ Final Installation Lead ConnectionsConnect all wires, making sure that each connection isinsulated and secure. Bundle all loose wires and fastenthem with tape so they will not fall down later. Nowinsert the stereo unit into the mounting collar.Congratulations! After making a few final checks, you’reready to enjoy your new auto stereo system. ❐ Final Checks 1. Make sure that all wires are properly connected andinsulated.2. Make sure that the stereo unit is securely held in themounting collar.3. Turn on the ignition to check the unit for properoperation.If you have difficulties, consult your nearest author-ized professional installer for assistance. ❐ Preparation

• Disconnect the cable from the negative batteryterminal (see cautions below).• Unit should be installed in a horizontal position withthe front end up at a convenient angle, but not morethan 30˚. Dashboard Installation Installation OpeningThis unit can be installed in any dashboard having anopening as shown above. The dashboard should be ⁄16"(4.75 mm)– ⁄32" (5.56 mm) thick in order to be able tosupport the unit.• We strongly recommend that you wear gloves forinstallation work to protect yourself from injuries.• When bending the mounting tabs of the mountingcollar with a screwdriver, be careful not to injureyour hands and fingers.Caution: Do not disconnect the battery terminals ofa car with a trip or navigational computer since alluser settings stored in memory will be lost. Insteadtake extra care with installing the unit to preventshorts.Cautions:
• We strongly recommend that you wear gloves for installation work to protect yourself from injuries.

• When bending the mounting tab of the mounting collar with a screwdriver, be careful not to injure your hands and fingers.

Establish the rear connection of the unit. After fixing Mounting Bolt t and Power Connector y, fix the rear of the unit to the car body by either method(a) or (b) shown below. Insert Trim Plate i. After installation re- connect the negative (–) battery terminal. First complete the electrical connections, andthen check them for correctness.(a Page 28) Insert Mounting Collar q into the dashboard, and bend the mounting tabs out with a screwdriver. The included Mounting Collarq is designed specially for thisunit. Do not use it to attach anyother model.y Power Connector Engage the MountingSprings () in themounting holes ofthe Mounting Collarq firmly.Mounting SpringMounting Hole Tab q Mounting CollarMounting Springs (R)Mounting Holest Mounting BoltThe tabs to be bent vary depending on thecar. To securely install the unit, fully benda number of the tabs so that there is norattling.Example: (a) Using the rear support strap e rTapping screw (5 mmø×16 mm) wHex. nut (5 mmø) e Rear support strap t Mounting bolt (5 mmø) q Mounting collar Fire wall of car 3 mmø (b) Using the rubber cushion (option) t Mounting bolt (5 mmø) q Mounting collar Rear support bracket (provided on the car) Rubber cushion (option) Mounting spring (L)E

Installation (Continued) To Remove the Unit Switch off the power of the unit.Remove the removable face plate. Press []. (release button). Theremovable face plate will be released. Remove the Trim Plate i with a screwdriver.

Insert the Dismounting Plates, u alongthe grooves on both sides of the main unituntil “click” is heard. Pull out the unit while pushing the platesfurther inside. Remove the unit pulling with both hands.

Anti-Theft System Caution:• This face plate is not waterproof. Do not expose it to water or excessive moisture.• Do not remove the face plate while driving your car.

• Do not place the face plate on the dashboard or nearby areas where the temperature rises to high level.

• Do not touch the contacts on the face plate or the main unit, since this may result in poor electrical contacts.

• If dirt or other foreign substances get on the contacts, wipe them off with a clean and dry cloth. This unit is equipped with a removable face plate. Removing this face plate makes the radio totally inoperable. Place the Removable Face Plate into Case

Switch off the power of the unit. Remove the removable face plate. (➡ page 26) Gently press the bottom of the case and open thecover. Place the face plate into the case and take it withyou when you leave the car.Removable face plate case

Slide the left side of the removable face plate in place. Press the right end of the removable face plate until“click” is heard. Tab Cutout

Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol A are trademarks of Dolby Laboratories Licensing Corporation. ❏ General Power Supply: 12 V DC (11 V – 16 V) Test Voltage 14.4 V, Negative ground Maximum Power Output: 50 W × 4 channels at 400 Hz, Volume Control maximum Tone adjustment range: Bass: ± 12 dB at 100 Hz Treble: ± 12 dB at 10 kHz Current Consumption: Less than 2 A (tape mode, 0.5 W × 4 chanels) Pre-Amp Output Voltage: 2.0 V (CD Play mode; 1kHz, 0 dB) Suitable speaker impedance: 4 - 8 Ω Dimensions (W × H × D): 7" × 1-15/16" × 6-1/10" (178 × 50 × 155 mm) Weight: 3 lbs. 1 oz (1.4 kg) ❏ AM Radio Frequency Range: 530 – 1 710 kHz Useable Sensitivity: 28 dBµV (25 µV, S/N 20 dB) ❏ FM Stereo Radio Frequency Range: 87.9 - 107.9 MHz Useable Sensitivity: 13.2 dBf. (1.25 µV, 75 Ω) 50 dB Quieting Sensitivity: 15.2 dBf. (1.6 µV, 75 Ω) Frequency Response: 30 - 15 000 Hz (±3 dB) Capture Ratio: 1.5 dB Alternate Channel Selectivity: 75 dB Stereo Separation: 35 dB (1 kHz) Image Response Ratio: 65 dB IF Response Ratio: 100 dB Signal/Noise Ratio: 70 dB ❏ Tape Player Reproduction System: 4-track, 2-program stereo Tape Speed: 1-7/8"/sec (4.76 cm/sec) FF/REW Time: Less than 110 sec (C-60) Frequency Response: 35 - 14 000 Hz ±3 dB (normal)

35 - 17 000 Hz ±3 dB (metal)

Wow and Flutter: 0.12 % (WRMS) Signal/Noise Ratio: 52 dB (Dolby B NR OFF) 62 dB (Dolby B NR ON) Note: Specifications and design are subject to modification without notice due to improvements in technology. Electrical Connections Cautions:

• To prevent damage to the unit, be sure to follow the connection diagram below.

• Remove the covering of the leads about 5 mm long from their end before connecting.

• Do not insert the power connector into the unit until the wiring is completed.

• Be sure to insulate any exposed wires from a possible short-circuit from the car chassis. Bundle all cables and keep cable terminals free from touching any metal parts. CQ-R253UAntennaPREAMP OUT CONNECTOR (Rear)CD ChangerControl ConnectorL(White)R(Red)CD•C INFuse(3A)Extension CordSupplied for an optional CD changer(DIN/BATT/RCA/GND)Ground LeadTo a clean, bare metallicpart of your carTo the car battery, continuous+12V DCBattery LeadRCA CordDIN Cord(White)(Red) (R) (L) CD ChangerCX-DP880U(option)BATTERYFuse (15 A)If the fuse (rear panel) blowsfrequently, they may besomething wrong with the unit.Consult your nearest PanasonicService Centre for servica.Blue/white stripeFront speaker leadWhiteWhite/black stripe Gray Gray/black stripeGreenGreen/black stripeVioletViolet/black stripe Left Front Rear RightRight Left Rear speaker lead Blue BlackYellow Red External AmplitierControl Power LeadTo an external amplitierNote: This lead is used for powercontrol when an external poweramplifier is connected. The powersupply of a power amplifier will beactivated when turning on the power of this unit.Not UsedGround lead(To a clean, bare metallicpart of the car chassis.)Battery lead(To the car battery,continuous +12 V DC)ACC power lead(To ACC power, +12 V DC) FRONT SP BATTERY 15A ACC REAR SP Power Connector Preparation:

• This unit can be connected to an optional CD changer (CX-DP880U). For details consult your nearest panasonic servicenter.

• For connection to a CD changer, refer to the operating instructions of the CD Changer (CX-DP880U). ❐ Schéma de câblageF

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