BOSS BV4250 User Manual

1.25 Mb



AM/FM Receiver

Congratulations on your purchase of a In-DashDVD Receiver.

It has been designed, engineered and manufactured to bring you the highest level of performance and quality, and will afford you years of listening pleasure.

Thank you for making a your choice for car audio entertainment.


2Safety Information


6Wiring Diagram


7Features and Controls

8Preparing The Remote Control

9Using The Detachable Front Panel

9 General Operation

11 Radio Operation

11 CD/MP3 Operation

13 DVD/VCD Operation

17 Data Disc Play Operation

17 Memory Card Play Operation

17AV In Operation

18Addtional Information


19System Setup

20Language Setup

21Audio Setup

21 Digital Setup



BV4250 User’s Manual - page 1

Safety Information


This mobile DVD player is a class 1 laser product. However this mobile DVD player uses a visible/invisible laser beam which could cause hazardous radiation exposure if directed. Be sure to operate the mobile DVD player correctly as instructed.

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Do not open covers and do not repair yourself. Refer servicing to qualified personnel.


-To reduce the risk of fire or electric shock, do not expose this equipment to rain or moisture.

-To reduce the risk of fire or electric shock, and annoying interference, use only the recommended accessories.

-This device is intended for continuous operation.

This product incorporates copyright protection technology that is protected by method claims of certain U.S. patents and other intellectual property rights owned by Macrovision Corporation and other rights owners. Use of this copyright protection technology must be authorized by Macrovision Corporation, and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision Corporation. Reverse engineering or disassembly is prohibited.

Region Management Information

This mobile DVD Player is designed and manufactured to respond to the Region Management Information that is recorded on a DVD disc. If the Region number described on a DVD disc does not correspond to the Region number of this Mobile DVD Player, this Mobile DVD Player cannot play this disc.


Disc formats supported by this player

Handling and Cleaning

-Dirt, dust, scratches and warping discs will prevent proper operation.

-Do not place stickers or make scratches on discs.

-Do not bend discs.

-A disc should always be kept in its case when not in use to prevent from damage.

-Do not place discs in the following places:

1.Direct sunlight.

2.Dirty, dusty and damp areas.

3.Near car heaters.

4.On the seats or dashboard.

Disc Cleaning

Use a dry soft cloth to wipe the surface. If the disc is quite dirty, use a soft cloth slightly moistened with isopropyl (rubbing) alcohol. Never use solvents such as benzene, thinner or conventional record cleaners as they may mar the surface of the disc.

BV4250 User’s Manual - page 2

Label side up

Do not touch the underside of the disc

Do not bend

Wipe the disc from center toward the outside edge

Preparing New Discs with Rough Spots

A new disc may have rough edges on its inside and outside edges. If a disc with rough edges is used, the proper setting will not be performed and the player will not play the disc. Therefore, remove the rough edges in advance by using a ballpoint pen or pencil as shown on the right. To remove the rough edges, press the side of the pen or pencil against the inside and outside edges of the disc.

Rough spots on outside edge

Ball point pen or pencil

Rough spots on inside edge



-Choose the mounting location where the unit will not distract the driver.

-Before the installation of unit, connect the wiring temporarily and make sure it is all connected up properly and the unit and the system works.

-Use only the parts included with the unit to ensure proper installation. The use of unauthorized parts can cause malfunctions.

-Consult with your nearest dealer if installation requires the drilling of holes or other modifications of the vehicle.

-Install the unit where it does not get in the driver's way and cannot injure the passenger if there is a sudden stop, like an emergency stop.

-If installation angle exceeds 30° from horizontal, the unit may not perform properly.

-Avoid installing the unit where it will be subject to high temperature, such as from direct sunlight, or from hot air, from the heater, or where it would be subject to dust, dirt or excessive vibration.

DIN Front/Rear-Mount

This unit can be properly installed either from the 'Front' (conventional DIN Front-mount)or the ‘Rear' (DIN Rearmount installation, utilizing threaded screw Holes at the sides of the unit chassis). For details, refer to the following illustrated installation methods.

BV4250 User’s Manual - page 3

Remove Transit Screws Before Installation

Before installing the unit, please remove the two screws.

Take out screws before installation.

1. DIN Front-Mount(Method A)

Installation Opening

This unit can be installed in any dashboard having an opening as shown below:

Installing the unit

Be sure you test all connections first, and then follow these steps to install the unit.

1.Make sure the ignition is turned off, and then disconnect the cable from the vehicle battery's negative (-)terminal.

2.Disconnect the wire harness and the antenna.

3.Press the REL button (7) on the front panel and remove the control panel (For details, refer to 'Using the Detachable Front Panel').

4.Lift the top of the outer trim ring, then pull it out to remove it.

5.The two supplied keys release tabs inside the unit's sleeve so you can remove it. Insert the keys as far as they will go (with the notches facing up) into

BV4250 User’s Manual - page 4

the appropriate slots at the middle left and right sides of the unit. Then slide the sleeve off the back of the unit.

6. Mount the sleeve by inserting it into the opening of the dashboard and bend open the tabs located around the sleeve with a screwdriver. Not all tabs will be able to make contact, so examine which ones will be most effective. Bending open the appropriate tabs behind the dashboard to secure the sleeve in place.

7.Reconnect the wire harness and the antenna and be careful not to pinch any wires or cables.

8.Slide the unit into the sleeve until it locks into place.

9.To further secure the unit, use the supplied metal strap to secure the back of the unit in place. Use the supplied hardware (Hex Nut (M5mm) and Spring Washer) to attach one end of the strap to the mounting bolt on the back of the unit. If necessary, bend the metal strap to fit your vehicle's mounting area. Then use

the supplied hardware (Tapping Screw (5x25mm) and Plain Washer) to attach the other end of the metal strap to a solid metal part of the vehicle under the dashboard. This strap also helps ensure proper electrical grounding of the unit.

10. Reconnect the cable to the vehicle battery's negative (-)terminal. Then replace the outer trim ring and install the front panel.

Removing the unit

1.Make sure the ignition is turned off, and then disconnect the cable from the vehicle battery's negative (-)terminal.

2.Remove the metal strap attached the back of the unit (if attached).

3.Press the release button to remove the front panel.

4.Lift the top of the outer trim ring, then pull it out to remove it.

5.Insert both of the supplied keys into the slots at the middle left and right sides of the unit. Then pull the unit out of the dashboard.

2. DIN Rear-Mount(Method B)

If your vehicle is a Nissan or Toyota, follow this mounting instruction: Use the screw holes marked T (Toyota), N (Nissan) located on both sides of the unit to fasten the unit to the factory radio mounting brackets supplied with your car.

Fasten the unit to the factory radio mounting brackets. Align the screw holes on the bracket with the screw holes on the unit, and then tighten the screws (5x5mm) on each side.

Note: the outer trim ring, sleeve and

the metal strap are not used for

method B installation.

BV4250 User’s Manual - page 5

Wiring Diagram

White to Rear L CH RCA output

Red to Rear R CH RCA output

Green to SUB-Wooferoutput
















Violet Rear Right +

Yellow to Battery B+

Violet/Black Rear Right -

Black to GND B-

Grey Front Right +

Red to ACC

Grey/Black Front Right -

Blue to ANT

White Front Left +

Green Rear Left +

White/Black Front Left -

Green/Black Rear Left -

BV4250 User’s Manual - page 6


Features and Controls

Front Panel:























Back of Front Panel:




BV4250 User’s Manual - page 7

Remote control:






































Preparing and Using The Remote Control

*Before using the remote control, please take the transparent insulator strip off the bottom of remote control.

*Point the remote control at the remote sensor (2) from no more than 6 feet away.

*If the IR sensor is exposed to direct sunlight, the remote control may not be able to communicate with it properly. You may need to relocate or shield the IR sensor.

*If you are more than 30º away from being directly in front of the IR sensor, the remote control may be unable to communicate properly.

*The remote control is a small, lightweight precision device. To avoid damage, short battery life, operational errors and poor response, observe the following:

-Do not subject the remote control to excessive shock.

BV4250 User’s Manual - page 8

-Do not put in a pocket.

-Keep away from food, moisture and


-Do not place in direct sunshine.

Battery replacement

The remote control uses a lithium buttontype battery, model CR2025 3V. Do not use any other kind of battery in the remote. Follow these instructions when installing or replacing the battery.

1. Opening the battery case

Slide out the battery cover while firmly pressing in the direction of the arrow.

2. Replacing the battery

Place the battery in the case with the positive (+) mark up as shown in the illustration below.

3.Closing the cover

Slide the cover as illustrated until a click is heard.

Using The Detachable Front Panel

Removing the Front Panel

1.Press the release button (7) on the front panel.

2.Pull off the front panel.

3.Store the front panel in its protective case.

Installing The Front Panel

To install the front panel, insert the panel into the housing and make sure the panel is properly installed. Otherwise, the display or some keys may not function properly.

General Operation

Initial System Start-Up

Be sure to press the RESET button (12) when using the unit for the first time, after all connections are completed correctly.

1.Turn off the unit power.

2.Press RESET with a ballpoint pen or similar pointed object.

Turning Power On And Off

Press button (9) or insert a disc to turn on the unit.

When system is on, press button (9) to turn off the unit.

Loading/Removing a Disc

1.Insert the disc into the disc slot (5) with the printed side facing up. The player will play the disc automatically.

2.Whenever press button (4) to eject the disc.

Adjusting sound quality

-Adjustingthe volume level

Press VOL+/VOL- button (10) to adjust the volume level.

-AdjustingBass/Treble/Balance/Fader 1.Repeatedly press SELbutton (11) to choose the desired mode.

Each time you press the SEL button it will advance through the following setting modes:



Bass level: -7to +7 Treble level:-7to +7 Balance: 15L to 15R Fader: 15R to 15F

2. PressVOL+/VOL- (10) to adjust the setting.

Display/Adjust Time 1. Displaying time:

PressDISP button (15) on the unit to show the current information and time on the LCD. It will return to its original state after 5 seconds.

BV4250 User’s Manual - page 9