Naxa NCA-681 User manual

INSTRUCTION MANUAL
MODEL: NCA-681
IMPORTANTINFORMATION REQUIRED BY THE FCC
This device complieswith Part 15of the FCCRules. Operation issubject to thefollowing two
conditions: (1)this devicemay not causeharmful interference; and(2) this devicemust accept
any interference received,including interference thatmay cause undesirableoperation.
NOTE: This equipmenthas been testedand found tocomply with thelimits for aClass B digital
device, pursuant toPart 15 ofthe FCC Rules.These limits aredesigned to providereasonable
protection against harmfulinterference in aresidential installation .
This equipment generates.usesand can radiateradio frequency energyand, if notinstalled and
used in accordancewith the instructions,may cause harmfulinterference to radioelevation
reception, which canbe determined byturning the equipmentoff and on.The user isencouraged
to try tocorrect the interference byone or more ofthe following measures:
* Reorient orrelocate the receivingantenna.
* Increase theseparation between theequipment and receiver.
* Connect theequipment into anoutlet on acircuit different fromthat to whichthe receiver is
connected.
* Consult thedealer or anexperienced radio/TV technicianfor help.
Fold Down Full Detachable PLL Electronic Tuning
Stereo AM/FM Radio, MP3/CD Player & Remote Control

DEAR CUSTOMER:
Thank you for purchasing this car audio product.
Selecting fine audio equipment such as the unit you have just purchased is only the start
of your musical enjoyment. Now it is time to consider how you can maximize the fun and
excitement your equipment offers.
We hope you get the most out of your equipment by playing it at a safe level.
One that lets the sound come through loud and clear without annoying blare or distortion,
and, more important, without affecting your sensitive hearing.
Sound can be misled. Over time your hearing " comfort level " adapts to higher volumes
of sound. So what sounds " normal " can actually be loud and harmful to your hearing.
Guard against this by setting your equipment at a safe level BEFORE your hearing adapts.
To establish a safe level:
Start your volume control at the lowest setting , then slowly increase the sound until you can
hear it comfortably and clearly, and without distortion we want you listening for a lifetime.
Once you have established a comfortable sound level:
Set the dial and leave it there.
Taking a minute to do this now will help to prevent hearing damage or loss in the
future. After all, we want you listening for a lifetime.
ABOUT THIS MANUAL
This product features a number of sophisticated functions ensuring superior reception and
operation. All are designed for the easiest possible use, but many are not self-explanatory.
This operation manual is intended to help you benefit fully from their potential and to
maximize your listening enjoyment.
We recommend that you familiarize yourself with the functions and their operation by
reading through the manual before you begin using this product. In this operation manual,
the Basic Operation for each sound source is outlined at the beginning of its explanation,
covering simple operation for that source, such as merely playing music.
Remark:
In addition to normal audio CD, this unit can play CD-R and CD-R/W disc that contain
audio tracks as well; however, depending on the conditions of the recording equipment,
recording program or the CD-R as well as CD-R/W disc itself, some CD-R or CD-R/W
may not play.
When making music CD with CD-R or CD-R/W disc, too high recording speed may
result in poor signal quality and therefore, it is recommendable to select 24x or lower
speed for CD-R recording and 4x or lower speed for CD-R/W recording.
Page 1

Page 2
1. OPEN BUTTON
Press the OPEN button to fold down the front control panel.
Then a CD can be inserted into the CD slot or ejected by pressing the EJ button.
After flipping down the front panel, push it rightwards firstly,then draw the left of
the panel outwardsto remove it from the unit chassis.
2. SEL BUTTON (Select) AND ROTARY ENCODER
a) Press the SELbutton briefly, it is activated as selecting each mode of E. VOL.
-> VOLUME ->BASS ->TREBLE -> BALANCE -> FADER ->
When selecting a desired audio mode, rotate the VOL knob to adjust the audio
effect.
In each mode,the waiting time is about 5 seconds, and the time waiting time
is over, it returns to the last display mode of tuner or CDP mode.
The control mode of E.VOL is operated with following numeric display.
- VOL: (MIN)00, 01,......46, 47(MAX).
- BASS/TRE: -07, -06,...,00,...+06,+07
- BAL: 0LR9, 1LR9, ..., 9LR9,..., 9LR1, 9LR0
- FAD: 0FR9,1FR9, ...,9FR9,..., 9FR1, 9FR0
Page 13
SPECIFICATION
GENERAL
Supply Voltage DC 12V. Negative Ground
Current Consumption Max.15A
Power Output 40Watts X 4(measured at DC 14.4V)
Number of channels 2 STEREO channels.
Unit Dimensions 178[W] X 165[D] X 50[H] mm.
FM SECTION
Frequency range 87.5MHz - 107.9MHz
Effective sensitivity 3uV.
I.F Frequency 10.7MHz.
AM SECTION
Frequency range 530KHz - 1710KHz
Effective sensitivity 40dB.
I.F Frequency 450KHz
RCA LINE OUT
Output 1200mV @ CD MAX.
CD PLAYER
System MP3 Audio System.
Suitable CDs MP3, WMA, CD, CD-R, CD-RW Disc
Frequency characteristics 20Hz-100Hz < 5dB
\
10KHz-20KHz < 5dB.
\
S/N Ratio to CD 50dB [1KHz]
LOCATION AND FUNCTION OF CONTROLS

Page 3 Page 12
b) When pressed longer 2 seconds, it is activated as cyclical mode of following
functions for user’s selection.
->BEEP (ON/OFF) -> USER SET(FLAT/CLASSIC/ROCK/POP)
->VOL(LAST/DEFA) ->CLK(ON/OFF)->CLK(12/24)mode.
After selecting the desired mode, rotate the VOL knob to select one setup
item of the desired mode.
BEEP ON/BEEP OFF
BEEP ON mode: The beep is generated when any key is pressed.
BEEP OFF mode: The beep sound is disabled.
VOL LAST/VOL DEFA
VOL LAST: Theradio switches onat the actualvolume it had when it was last
switched off.
VOL DEFA: After pressing SEL button,AVOL will be displayed. Then you can
pre-select a constant switch-on volume by using the VOL knob.
CLK ON/OFF
CLK ON: Clockwill always show on the display when power off.
CLK OFF: Clockwill disappear on the display when power off.
3. POWER ON/OFF
When the unit is power off, the unit comes to ON by pressing the power button.
It also canturn on the unit to insert a disc into CD slot.
When the unitis power on, press and hold the power button for more than 0.5
seconds, the unit goes into power off mode.
4. LCD Display
5&6. TUNE, SEEK, TRACK, SKIP UP / DOWN BUTTONS
a) During RADIO mode:
Press the >>| or |<< button shortly to manual tune up/down for the desired
radio station frequency step by step.
Press and hold the >>| or |<< button for longer 0.5 seconds, to automatically
tune up/down for the radio station frequency of strong signal.
b) During DISC playback mode:
Press the >>| button brieflyto play next track.
Press the |<< button briefly to play the current track from the beginning of it
if the playing time ismore than 2 seconds.
Press the |<< button briefly to play the previous track if the playing time is
less than 2seconds.
Press the >>| or |<< button and hold to skip forwards or backwards, release
to resume discplayback.
7. BAND BUTTON
During radio mode, press the BND button briefly to select the radio broadcasting
band you would like to hear. The AM/FM band is toggled cyclically through the
tuning bands: ->FM 1-> FM 2 -> FM 3 ->AM 1->AM 2 ->.
8. MODE BUTTON
Press the MD button to change among tuner(radio),disc(if disc is loaded)
and AUXmode.
TROUBLE SHOOTING
Before using the check list please make all the connections first.
If you still have questions after going through the checklist, please consult
your local customer service representative.
Common Symptoms
There is no power.
The CDs cannot
be loaded.
Cause
The fuse has blown.
Presence of CD disc inside the player
Inserting the disc in upside down
The surface of CD is extremely dirty
or it is damaged.
Temperature inside the car is too
high.
The volume control is set too low.
There is no sound.
The operation keys
do not work
The sound of the
CD player skips
The antenna cable is not connected. Insert the antenna cable firmly into the
antenna socket of the device.
No radio reception.
1.The built-in microcomputer is not
operating properly due to noise
2.Front panel is not properly fix into
its place
1. Switch the device off and on again. Or press
the RESET button to resume the program.
2. Reinstall the front panel
The device has not been correctly
connected.
The installation angle is more than
30 degrees
Wait until the road becomes smoother before
playing the CD.
Adjust the installation angle to less than 30
degrees
Turn up the volume properly.
Check the power and earth connection
according to the wiring diagram.
Cool off until the ambient temperature returns
to normal
Clean the CD or try another CD, if this works
correctly, the first CD is properly damaged.
Insert the compact disc with the label facing
upward
Remove the disc in the player then put a new
upward
Replace another fuse according to the wiring
diagram.
The car ignition is switched off. If the power supply is properly connected to
the car accessory, switch the ignition key to
ON or " ACC" " " .
Solution
The device does
not work correctly
(EJECT, LOAD,
PLAY)
In automatic search
mode the radio does
not stop at a trans-
mitting station.
Tune in to a radio station manually.The transmission signals are too
weak.
The CDs are loaded
only halfway into
the CD tray.
The transport screws have not been
removed.
Remove the transport screws before using.
The surface of the road is uneven.
The surface of CD is extremely dirty
or it is damaged.
Clean the CD or try another CD, if this works
correctly, the first CD is properly damaged.

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Page 11
9. MUTE BUTTON
This button serves to switch the MUTED state on/off.
Press the MUbutton to suppress the loudspeaker temporarily, and press
again to resume listening. The muted state will be also released when the
MODE, SEL button is pressed and VOL knobon the front panel is used.
10. INFRARED REMOTECONTROL SENSOR
11. CLOCKBUTTON
Press the CLK button briefly to display time for 5 seconds on the display, and
then returns to its previous display unless the button is pressed again.
Then press the CLK button and hold for more than 1 seconds until the real time
flashes on the display. Then you can adjust HOUR or MINUTE by rotating the
VOL knob.
12. LOUDNESS BUTTON
When press shortly, the LOUD mode is turned on, its to enhance the bass sound
effect when the volume level is low. Press again to cancel the loudness effect.
13. ST/MO BUTTON
In FM mode, press the ST button briefly to select stereo or mono sound mode.
14. A.PBUTTON (Auto-storage /Preset scan)
During radio mode:
1) Press theA.P button and holdfor longer than one second to activate automatic
station storage. The radio searches from the current frequency. And then 18
FM or 12 AMsignal stations are allocate to the corresponding storage locations
each band. When the auto-storage operation is finished, the radio execute the
Preset Scan.
2) Press the A.P button briefly, the radio searches for each preset station in the
current band and holds at that preset number for 5 seconds with releasing
mute, and then search again.
During MP3/WMAmode, press the A.P button, it is activated selecting song
mode, and the TRK 000(if the number of tracks is less than 100 and more than
9, it will be TRK 00) will be visible on the LCD display and the hundreds digit 0
that the MP3/WMA disc contains will flash.
Rotate the VOLknob to selectand enter the number on the flashing digit place
from 0 to 9.
Then press the A.P button to confirm the entered number and the 0 on the tens
digit will be flashing.
Rotate the VOL knobto select and enter the number on the flashing digit
from 0 to 9.
Then press the A.P button to confirm the entered number and the 0 on the
units place digit will be flashing.
Rotate the VOL knobto select and enter the number on the flashing digit
from 0 to 9.
After finishing enter all the number of the song serial number on the flashing
digit, press theSEL button to play thecorresponding track.
PRECAUTION OF DISC PLAY:
Cleaning the CD:
Before playing a CD, wipe it off with a clean, dust-free cleaning cloth.
Wipe the disc in the direction of the arrow.
Always insert the CD with the label side facing upwards.
If the CD is inserted with the printed side facing downwards, the device may be
damaged.
Note: If there is already a CD in the CD slot, do not try to insert a second CD.
This may damage the device.
Always hold CDs by the edge. In order to keep the CD clean do not touch the surface.
Pull out the CD as shown below.
Do not attach any sticker or adhesive tape on the CD.
Do not expose the CD to direct sunlight or sources of heat such as heating vents.
Do not leave CDs in a car if it is parked in direct sunlight as that will lead to a con-
siderable rise in the temperature inside the car.
Note: Do not use any solvents such as petrol or thinning agents.
Commercially available cleaning substances or antistatic spray. This will damage
the device.

Page 5 Page 10
15-20. PRESET STATION MEMORYAND TOP/>||, INT,RPT, RDM BUTTONS
a) During radio mode:
When pressed short,these buttons select a preset station directly.
If the six buttons are pressed for more than 2 seconds, the station
currently being listened to is memorized into the selected preset button.
b) During CD/MP3/WMA mode:
Press the TOP/>|| buttonbriefly to interrupt the playback of the disc.
Press again toresume normal playback.
Press the TOP/>|| buttonand hold for approximately 0.5 seconds to play
the first track of the current disc.
Press the INT button to play the first 10 seconds part of each track, and the
LCD will display INT ON.
Press again to stop scan, while the currently selected track will be played,
and the LCDwill display INT OFF.
Press the RPT button to play the current track repeatedly, and the LCD will
display RPT ONE.
Press again tocancel this function, and the LCD will display RPT OFF.
During MP3/WMAmode, press the RPT button twice continuously to play the
tracks in the current folder repeatedly and RPT ABM will be visible on the LCD.
Press the RDM button to play all tracks on disc in random order, and the LCD
will display RDM ON.
Press again tocancel this function, and the LCD will display RDM OFF.
c) During thenormal playback of CDs in MP3/WMAformat:
Press the radio preset button 6 and 5 to move up and down10 tracks at a time.
21. LOC BUTTON
Radio station search mode is divided by this LO/DX switch, this button can be
used to control an attenuator in the tuner during search. The detecting level
of seek, scan, auto-memory will be reduced as much as the attenuated level
of the tuner. In radio mode, press the LOC button to change local reception or
distance reception.
Note: This button is only for FM reception. In AM mode, LOC is void.
22. SCAN BUTTON
Press the SCN button to scan the radio frequency. If a valid signal has detected,
the current frequency will be hold and blinked for 5 seconds, then press SCN
again to stop scan and remain the current frequency; otherwise, the radio will
go on to scan the other radio frequency five seconds later.
23. AUX INPUT JACK
Press the mode button to select auxiliary input playing mode. You can connect
any matched externalaudio device tothe auxiliary input jack. Use the volume
control to adjust volume.
24. EJECT KEY
In the power on state, the loaded disc can be ejected by pressing the EJ key.
25. CD SLOT
INSTALLATION METHOD
This is an anti-theft installation method.
The main unit wears a METAL MOUNTING SLEEVE.
Please connect the wiring, eg, the Power Supply, the Speakers and the Antenna
according to the requirements of this Instruction Manual, then install the metal
mounting sleeve into the car as per the diagram illustrated below.
To boost up the capability of anti-jamming,
please make sure fix tightly the metal support
strap into the metal joint that connect to the
chassis of the car.
METAL SUPPORT STRAP
METAL MOUNTING SLEEVE
DASHBOARD
To remove the unit out of the metal mounting sleeve,
insert the two supplied KEYS into the left and right side
slots of the chassis at the same time. Then pull the chassis
out of the metal mounting sleeve as shown in the right
illustration.
FRONT PANEL
PLASTIC TRIM RING
UNIT CHASSIS
Bend the tabs on the metal mounting
sleeve against the DASHBOARD with
a screwdriver.
NOTE
To attachthe removable faceplate backto the
unit chassis, firstly jointhe left guide blockhole
to the left cylinder, then join theright guide block
hole and the rightcylinder, finally flipthe front
panel up to combinewith chassis.
Before mounting and operating
the CD player,remove the metal
mounting sleeve illustrated bythe
arrows.
Remove the two screwsthat
fix the CD deckmechanism player
during transportation before
mounting the player.
RESET BUTTON
Push this reset buttonwith a cuspidal
object to renovate thedistorted program
once the program isdistorted.
To removethe front panel,
after flip down thefront
control panel, push itrightwards
firstly, then drawthe left of
the front panel outwards.
Before inserting or ejectingdisc, press
the OPEN button toflip down the faceplate.

Page 9 Page 6
Note:
1.Make sure usea speaker with 4 ohm load impedance.
2.Do not makethe auto antenna wire and ground touch each other.
WIRING DIAGRAM
+
++
+
YELLOW
ANTENNA PLUG
CONSTANT B+
BLACK(GND)
IGNITION SWITCH
RED (B+)
FRONT
REAR
RIGHT
FRONT WHITE
WHITE/BLACK
GREEN/BLACK VIOLET/BLACK
GRAY/BLACK
GRAY
VIOLET
GREEN
REAR
LEFT
SPEAKER
--
--
BLUE AUTO ANT
SPEAKER
RED R
WHITE L
RCA LINE OUT
26. FLASHING LED
When the front control panelis removed thisindicator flashes.
27. RESET BUTTON
Before operating the unit for the first time, or after replacing the car battery or
changing the connections.Youmust reset theunit.
Press this button with acuspidal object. This operation will erase the clock
setting and somestored contents.
15A FUSE
0.5A FUSE
FILTER
BOX

Page 8
Page 7
1. Power On/Off.
2. Mute Button
3.
4. Level/MENU UP Button
5. SEL/MENU
Loudness Button
Button
6. Level/MENU Down Button
7. MO/ST Button
8. A.P Button
9. Band Button
10. Mode Button
11.Tune/Seek Up And Track Skip Up/FF Button
12.Tune/Seek Down And Track SkipDown/REW Button
13.SCAN Button
14. Clock Display /Setting Button
15. LOC Button
16. CD Track TOP/>||/Radio Preset 1
17. CD Track INT/Radio Preset 2
18. CD Track RPT/Radio Preset 3
19. CD Track RDM/Radio Preset 4
20. Radio Preset 5
21. Radio Preset 6
6
45
13
2
POWER
MUTE
CLK A.P -
+
SELDN UP
ST
LOC LOUD
SCN
MODE BAND
TOP/ RPTINT
RDM
4
6
8
14
16
18
20
7
11
15
19 21
15
3
13
12
10
9
17
2
OPERATION OF REMOTE CONTROLLER
Before using the remote controller, pull out the insulating patch. This patch
was installed to insulate the battery from draining until ready to use.
BATTERY INFORMATION:
Lithium Battery: CR2025 3V
Battery Life: Approximately 6 months.
Replacing the Battery from the Remote Controller:
1) Remove the battery holder by pressing the locking tab with your thumb
and pulling it out.
2) Replace the battery with the same type and the “side facing up.
3) Gently push in the holder until securely locked into place.
WARNING:
+”
Do not recharge, disassemble or dispose of in fire.
Battery leakage may cause damage to the unit.
To avoid the risk of accident, keep batteries out of reach of children.
MAINTENANCE OF REMOTE CONTROLLER
+ side up
B
A