Boss Audio BV7943 User Manual
Thank you for choosing Boss Audio Systems! This unit will
bring you years of enjoyment.
CONTENTS
Safety Precautions.................................................................2-3
Installation.............................................................................4-6
Wiring Connections...................................................................7
Controls Of The Unit...................................................................8
Basic Operation....................................................................9-10
Radio Operation..................................................................11-12
DVD/VCD/CD/MP3/WMA Operation..................................13-17
Setings & Sound.......................................................................18
Other Operation.......................................................................19
Maintenance...........................................................................20
IR Remote Control...................................................................21
Troubleshooting Guide..........................................................22
Specifications...................................................
............
...........22
SAFETY PRECAUTIONS
Important Warnings to Take Note of BEFORE Starting
the Installation
Damage Caused By Incorrect Installation or Usage is
NOT Covered By Warranty.
PLEASE Take the Time to Read the Installation Notes
Carefully.
Please make all necessary connections and terminate
any unused wires so they do not short. If you feel
uncomfortable preforming the install consult a professional installer.
To avoid any possible damage to your vehicles electrical system, be
sure to disconnect the battery cable before beginning installation.
The unit is intended for vehicles with a 12-volt battery and negative grounding.
Before installing the unit in a recreational vehicle, truck, or bus, check that the
battery voltage is 12 volts.
Remove the two transport screws from the top of the unit before installation.
Be sure to connect the negative (-) speaker leads to the negative (-) speaker
terminal. Never connect the negative (-) speaker leads to chassis ground.
This unit is only designed for use with 4 speakers. Do not combine outputs
for use with 2 speakers. Do not ground negative speaker leads to the chassis
ground.
Speakers connected to this unit must be 4 to 8 ohms. Connecting speakers
with output and/or impedance values other than those noted there will result
in damage to the head unit and the speakers.
Check the condition off your speakers carefully - connecting the unit to
old of degraded speakers may result in a fault which will damage the
audio IC and invalidate the warranty.
If this unit is installed in a vehicle that does not have an ACC (accessory)
position on the ignition switch, the red lead of the unit should be connected to
a terminal coupled with ignition switch ON/OFF operations. If this is not done,
the vehicle battery may be drained when you are away from the vehicle for
several hours.
2
SAFETY PRECAUTIONS
Secure the wiring with zip ties or electrical tape. . To protect the wiring, wrap
adhesive tape around them where they lie against metal parts. To avoid
short-circuiting, cover all disconnected lead with insulating tape. There is a
possibility of short-circuiting if the leads are not insulated.
Route and secure all wiring so it cannot touch any moving parts, such as the
gear lever and handbrake. Do not route wiring in places that get hot, such as
near the heater outlet. If the insulation of the wiring melts or gets torn, there is
a danger of the wiring short circuiting to the vehicle’s body.
Don’t pass the yellow lead through a hole into the engine compartment to
connect to the battery. This will damage the lead’s insulation and cause a very
dangerous short.
Do not shorten any leads, if you do, the protection circuit may fail to work
when it should.
Never feed power to other equipment by cutting the insulation of the power
supply lead of the unit and tapping into the lead. The current capacity of the
lead will be exceeded, causing overheating.
Since a unique audio I/C circuit is employed, never wire so the speaker leads
are directly grounded or the left and right - speaker leads are common.
When this product’s source is switched ON, a control signal is turned on
through the Blue/White lead. Connect to an external power amp’s system
remote control or the car’s Auto-antenna relay control terminal (max. 500mA
12V DC).
Do not block any vents or heater panels, Blocking them will cause heat to build
up and may result in fire.
When replacing the fuse(s) the replacement must be of the same amperage
as shown on the fuse holder. Never replace a fuse with another of a different
value. If the fuse blows again please contact your instsallation company.
Double check that all wiring and connections are correct before re-connecting
the battery and turning on the unit.
After completing the installation and before operating the unit, reconnect the
battery, then press the (RES) button with a pointed object, such as a ball-point
pen to set to unit to it’s initial status. After pushing the button, wait a few seconds for the red light to flash.
3
INSTALLATION
Tools for Installation
2 removal wrenches are supplied for taking out the old unit and place with this
brand name car radio. The following tools and supplies may also be needed for
the installation:
Tools for Installation: Philips Screw-drivers /Machine Screws /Wire Stripper
/Wire Cutter /Hammer /Pencil /Electrical Tape /Electric Drill
Supplies for Installation: Machine Screws /Crimp Connectors /14 Gauge Wire for
Power Connections /14-16 Gauge Speaker Wires
The above are not supplied.
Before you install
We strongly recommend that this unit should be professionally installed by a VAT
registered installer (this is a requirement to validate the warranty).
IMPORTANT: Remove the two transport screws from the top fo the unit before
installing.
Remove the Old Unit from the Dashboard
1. Remove the outer trim frame.
2. Insert the keys supplied with the
old unit into both sides of the unit
as shown in figure below until
they click. Pull to remove the old
unit from the dashboard.
DIN Front Mount
DO NOT DISCONNECT WIRES
AT THIS TIME!
Mark Polarity of the Speaker Wires
Marking the polarity of the speaker wirers will make it easier to connect the
existing speakers to your car radio. Consult wiring diagram of existing head
unit before disconnecting any wires. If you are not positive of the polarity of the
existing wires from the speakers to the head unit, install new wires.
1. While the old unit is playing, disconnect the wires from one speaker.
2. Take a length of masking tape and fold it around the wire so it forms a flag.
3. On the masking tape mark the polarity of the speaker wires (+&-), as well as
left or right, and front or rear.
4. Double check that you marked the first speaker correctly by checking that the
speaker wires are the same at the head unit.
5. Repeat this procedure for all of the speakers.
6. Mark the power, ground, and any other wires also.
4
INSTALLATION
WARNING!
Disconnect negative battery terminal from battery before starting
installation.
NOTE: Mark the polarity of the existing speaker wires before disconnecting battery.
NOTE: Remove the two transport screws from the top of the unit
before installing.
DIN Front Mount
1. After removing the old radio
and mounting sleeve, insert supplied mounting sleeve into opening.
3. Attach wires from the unit to
existing wires. See wiring connections diagram. Insert radio
into dashboard. Then apply the
trim frame to outside of radio.
2. Bend the tabs on the mounting sleeve to keep the mounting sleeve firmly in place.
4. Support radio using rear mounting
bolt and steel bar. (not included)
5
INSTALLATION
DIN Rear Mount
NOTE: Outer trim frame, hook, and mounting sleeve are not used
for this installation
This is only intended as a general guide; contact the vehicle’s manufacturer for
specific instructions.
This menthod of installation uses the screw holes at the sides of the unit and
the holes of the existing vehicle mounting bracket.
1. Remove the hooks on both sides.
2. Aligh the screw holes of the mounting bracket supplied with the car and the
screw holes of the main unit. Tighten the 2 screws on each side of the unit.
Then fasten the brackets to the car.
3. Attach wires of the unit to existing speaker wires. See wiring diagram.
6
WIRING CONNECTIONS
General Wiring Notes:
Black Ground
Connect to vehicle body/chassis. Make sure you have a good chassis ground.
This will eliminate most electrical noise form the motor and alternator. A good
chassis ground requires a tight connection to ground. The area should be free
from rust, paint or any form of dirt.
Light Green (Hand Brake - Ground)
Connect this wire to the hand brake wire of your car so that the display will be
on only when the car is fully stopped.
Purple-White (Rear Gear - VCC)
Connect this wire to the rear gear wire of your car so that the backup camera
function can be activated when you car is in reverse gear.
Yellow “Constant”
Connect to electrical terminal always supplied with power regardless of ignition
switch position.
Blue/White Remote Output (+)
Connect to Auto-antenna or power amp control wire/remote connection.
Maximum current 500mA.
Brake (Light Green)
Reverse (Purple-White)
Connector A
1. Rear right speaker(+)/Purple
Rear right speaker(-)/Purple-Black
2.
3. Front right speaker(+)/Grey
4. Front right speaker(-)/Grey-Black
5. Front left speaker(+)/White
6. Front left speaker(-)/White-Black
7. Rear left speaker(+)/Green
8. Rear left speaker(-)/Green-Black
Connector B
1. -
2. -
3. -
4. Battery 12V (+)/Yellow
5. Remote Trigger/Blue-White
6. -
7. ACC+/Red
8. Ground/Black
Speaker Wiring Notes:
Follow the above wiring diagram to install the head unit with new or existing
speakers.
1. This unit is designed for use with four (4) speakers with impedance between
4 Ohms to 8 Ohms.
2. An Impedance load of less than 4 Ohms could damage the unit.
3. Never bridge or combine the speaker wire outputs. When not using four
speakers, use electrical tape to tape the ends of the unused speaker outputs to
prevent a short circuit.
4. Never ground the negative speaker terminals to chassis ground.
7
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