Audiovox VOH641A Operation Manual

OperationOperation

OperationOperation

Operation
ManualManual

ManualManual

Manual

VOH641A

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Important Notice

It is unlawful in most jurisdictions for a person to
drive a motor vehicle which is equipped with a
television viewer or screen that is located in the
motor vehicle at any point forward of the back of
the driver’s seat, or that is visible, directly or
indirectly, to the driver while operating the
vehicle. In the interest of safety, the VOH641A
should never be installed where it will be visible,
directly or indirectly, by the operator of the motor
vehicle.

Please note that the state of Rhode Island forbids
the installation of such a device in a motor vehicle.

Safety Precaution

For safety reasons, when changing video tapes it is
recommended that the vehicle is not in motion, and
that you do not allow children to unfasten seatbelts to
change tapes or make any adjustments to the system.
System adjustments can be accomplished using the
remote control unit, while seatbelts remain fastened.
Enjoy your Audiovox entertainment system but
remember-safety of all passengers remains the
number one priority.

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Congratulations on your purchase of the Audiovox
VOH641A drop-down Video Monitor. The VOH641A
has been designed to give you and your family many
years of video entertainment in the mobile
environment. Please read the directions that follow
to familiarize yourself with the product and to ensure
that you obtain the best results from your equipment.
Please note: Installation options vary, see the
individual owner’s manuals for each component in
your system to obtain a full understanding of each
component’s operation.

Features

♦ 6.4” TFT (Thin Film Transistor) Active

Matrix LCD (Liquid Crystal Display)
Monitor

♦ IR transmitter for Wireless Headphones
♦ Remote Sensor Eye
♦ Three Audio/Video Inputs
♦ Headphone Amplifier
♦ Two Headphone Jacks for Wired

Headphones

♦ Built-in Dome Lights
♦ Backlit Controls for Low Light Operation
♦ Push button screen Brightness Controls

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1
2

6

8

10

3
4
5

7

9

11

12

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Front Panel

1. Infrared Transmitter - Used to transmit audio to
wireless headphones

2. Power button – (Bright red when system is On,
dim when Off)

3. Volume Up/Down – Controls volume to
headphone jacks and external speakers if
connected

4. Source Select – used to select one of the three
A/V sources.

5. Source indicator LEDs - Indicate the current
video source

6. Sensor Eye – Receives signals from infrared
remote controls and relays them to remote
mounted equipment.

7. Three position Dome Light Switch

• Auto – Automatically switches on the dome

lights in conjunction with the vehicle’s
interior illumination

• Off – The Dome lights will not turn on in

this position

• On – Turns on the Dome lights.

10. Headphone Jacks – allows plug-in of two wired
headphones with 1/8” stereo jack.

11. Auxiliary A/V Stereo Input – allows plug-in of

camcorder, game, portable DVD player or other
A/V source with RCA type output connectors.

12. Brightness Up/Down Control - use the
brightness up/down buttons to adjust the picture
brighter or darker.

Turning the VOH641A On or Off

1 Sliding the screen release lock forward will unlock

the LCD screen and it will drop down slightly. Pivot
the screen downward until a comfortable viewing
angle is reached. The internal friction detent will
hold the screen in position while the system is in
use.

2 Pressing the power button on the pod will turn the

system on or off alternately. When in use the internal
backlighting will illuminate the controls.

3 After the unit has been turned on and is displaying

a picture, adjust the viewing angle and brightness
controls to optimize the picture quality.

4 Remember to turn the unit off and pivot the LCD to

the locked position when not in use.

8. Dome lights – provide additional illumination

9. Screen Release – Slide in direction of arrow to
release the flip down screen

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Operation

Overhead Dome Lights

The lights integrated into the VOH641A are controlled
by a three position slide switch. Sliding the switch to
the on position will turn the lights on. The off position
will prevent the lights from turning on at all times, and
the auto position will allow the lights to turn on and off
with the vehicle’s interior lighting. Do not leave the
vehicle unattended with the dome light switch in the
on position, as this could result in a discharged battery

Remote Sensor

The VOH641A incorporates an infrared sensor which
relays signals from any infrared remote control to
allow a remote mounted device to be controlled
simply by pointing its remote control at the remote
sensor eye mounted on the pod. This provides control
of auxiliary equipment such as Video Cassette and
DVD players. The infrared sensor can relay signals
from any manufacturer’s remote control to its
respective component connected to the AV1 or AV2
inputs.

Dome
Light
Switch

Remote
Sensor eye

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External Auxiliary A/V Stereo inputs (Aux )

These inputs are provided to facilitate the temporary
connection of optional audio / video equipment, such
as a camcorder or video game system. They can be
accessed by removing their protective plastic cover
located behind the LCD hinge. To play a source with
these inputs, use RCA patch cord to connect the audio
/ video signals to their respective jacks. Mono audio
sources will require the use of an RCA Y cable (PN

0892165) to connect to both right and left inputs. Once

the connections have been made, turn the VOH641A
on and press the source selector button on the pod
until the “AUX” indicator LED illuminates. The unit
will now play the audio and video signals from the
accessory connected.

Optional Accessories

Wired Headphones

There are two 1/8” headphone jacks on the VOH641A
that can be used with any standard stereo
headphones. These jacks are controlled by the
volume up / down buttons on the VOH641A or the
remote control. Remove and save the protective
plastic cover to access the jacks. Remember to
replace the cover when the jacks are not in use

Wireless Headphones

The VOH641A includes a built in infrared transmitter
for use with Audiovox wireless headphones (PN
MVSWHS). Turning the headphone switch on, and
wearing them activates the internal micro switch
which will activate the internal IR receiver and the
volume can then be adjusted separately with the
controls on each headset. Any number of wireless
headphones can be used, but all must be within a line
of sight from the transmitter, as infrared
transmissions, like visible light travel only in a straight
line. See the documentation accompanying your
Audiovox wireless headphones.

External
Auxiliary A/V
Stereo
inputs

Infrared
Transmitter

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Wired FM Modulator

Your video system may be equipped with an RF
modulator, that allows you to listen to the VOH641A ’s
audio signal by tuning your vehicle’s radio to the
selected frequency, (88.7 or 89.1 - Check with your
installer) and turning on the remote mounted RF
modulator switch. (In most cases this toggle switch
will be located underneath the driver’s side of the
dash, check with your installer for the exact location.)
Whenever the RF modulator is on, broadcast radio
reception will be poor. Turning the remote mounted
toggle switch off will allow normal radio reception.

Audiovox Video Cassette Player (AV1)

In most installations a VCP will be connected to the
“AV1” input. To view a video cassette, turn the
VOH641A On and press the source button on its
control pad until the “A V1” indicator LED illuminates.
The VCP may also be operated with a remote or the
buttons on its face. The VOH641A is now ready to
play the audio and video signals from the VCP if it is
connected to the “AV1” input. Inserting a tape into the
VCP will automatically turn it on and activate the play
mode. If a rewound tape had already been loaded
into the VCP, prior to its activation, press play on the
VCP or on the remote control to view the tape. For
more information see the operator’s manual
accompanying your VCP.

Video Output

The VOH641A provides a video output for an optional
video monitor(s). (Refer to page 7 of the installation
guide for more details.) This output will provide a video
signal that duplicates the signal displayed by the
VOH641A to an additional monitor or video display.
Please see your installer for more information.

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Warnings

 Do not use any solvents or cleaning materials

when cleaning the video system.

 Do not use any abrasive cleaners, they may

scratch the screen. Use only a lightly dampened
lint free cloth to wipe the screen if it becomes dirty .

 Lock the LCD screen in the fully closed position

when not in use.

 Before putting on headphones always adjust the

volume setting to the lowest position.

 Remember to leave the dome light switch in the

off or auto positions when the vehicle is
unattended, as the dome lights, if left on, can drain
the vehicle’s battery .

 Do not put pressure on the LCD screen.
 Caution children to avoid touching or scratching

the screen, as it may become dirty or damaged.

AV2

The second video input may be connected to a DVD
player, video game system, or other audio / video input.
To play the AV2 source, turn the VOH641A on and
press the source button on the pod until the “AV2”
indicator LED illuminates. Turn the source component
on with its power button or remote control. The
VOH641A is now ready to play the audio and video
signals from the source connected to AV2 inputs.

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Specifications

• Check the condition of the

vehicle’s radio antenna.

• Verify that the antenna is fully

raised.

• If a wired RF modulator has

been installed, verify that its
switch is turned to the off
position.

• Verify that the batteries in the

suspect remote are fresh.

• Verify that the remote repeater

eye is not obstructed.

• Verify that the infrared

transmitter is affixed over the
sensor eye of the component
to be controlled

Troubleshooting

Poor radio
reception (FM
modulator
installed)

LCD Backlighting Edge Light T ube

Resolution 960 x 234

Pixels 224,640

Operation T emperature 0 - 40º C

Storage T emperature -20 - 80º C

Expected Backlight Life 10,000 Hours

Video Display System NTSC

Audio Output 0.1W @ 16 Ω

IR sensor
inoperative

Replacement Parts

Protective Plastic Cover 1023336
Optional Audiovox VCP Remote Control 0993000

PROBLEM

SOLUTION

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© 1999 Audiovox Corp. 150 Marcus Blvd. Hauppauge, NY 11788

128-5557E