Audiovox VOH-641 User manual

VOH-641Drop Down Video Monitor
VOH-642 Drop Down TV / Video Monitor
Installation Guide
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Important Notice
It is unlawful in most jurisdictions for a per-
son 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 operator of the motor vehicle.
Please note that the state of Rhode Island
forbids the installation of such a device in a
motor vehicle.

MATERIALS INCLUDED IN THIS PACKAGE:
1) VOH-641 Video Monitor with out TV Tuner / VOH-642 Video Monitor with TV Tuner (1 pc)
2) Accessory Harness (P/N 8010730) (1 pc)
3) 12 Pin Power / Signal harness (P/N 112B2821) (1 pc)
4) 2 Pin Power Wire Harness with choke (P/N 112B2824) (1 pc)
5) RCA “Y” Adapter (1 Male to 2 Female) (P/N 0892165) (1 pc)
6) Hardware Package
#4 x 3/8” Screws (12 pcs)
#8 x 5/8” Self Drilling Screws (4 pcs)
#8 Washers (4 pcs)
7) Remote Control (P/N 1361612 supplied with VOH-642 only)
8) Protective Cover for External A / V Inputs (P/N 1023336)
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3e
3
23
3a
3f
3d
3e
3c
3b
3
5
6
4
3c
CHOKE
TOOLS REQUIRED:
#2 Phillips Screwdriver
#1 Phillips Screwdriver
Utility or Razor Knife or Shears
Wire Strippers
Upholstery hook tool (for removal of panels as necessary)
Electrical Tape
Masking Tape
Multimeter (to verify 12 volt DC and continuity: Do not use a test light or logic probe)
Marker pen – to mark headliner
Scribe (to mark trim ring if used)
Misc. electrical connectors (to connect to vehicle power source). Requirements will vary from
vehicle to vehicle)
Video tape (to verify system operation after installation)
3a
7
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8

GENERAL INSTALLATION APPROACH:
1) Decide upon system configuration and options that will be installed (i.e.: what components, VCP,
Tuner, RF Modulator/external amp, remote headphones, 2nd VCP, etc.).
2) Review all manuals to become familiar with electrical requirements and hook ups.
3) Decide upon mounting locations of all components and method of mounting.
4) Prep the vehicle by removing any interior trim necessary to gain access to vehicle's wiring as well as
all areas where interconnecting wire harnesses will need to be located. If any access holes need to be
cut into the vehicle (headliner, other trim components etc.), this should be done now as well. (Refer to
Page 3).
5) Route the wiring harnesses throughout the vehicle as necessary. (Refer to the Wiring Diagrams on
pages 6 and 7 of this manual as well as the wiring instructions for the individual components and
accessory options being installed). Be sure that all wiring is protected from sharp edges and is routed
insuchamannerthatitwillnotbepinchedwhenallcomponentsandinteriortrimarefullyinstalled. Be
sure to leave enough slack in the wiring at each component to allow working room.
6) Remove all A/V system components from their packaging and place them loosely in the vehicle at
their respective locations.
7) Connect all components together (electrically) and verify proper operation of all system functions.
Note: This is best done BEFORE, components have been permanently mounted.
8) After verifying proper operation of the system, proceed to mount of each component.
9) When all components are mounted, recheck function of entire system again to ensure that no wiring
was pinched or connected improperly during final installation.
GENERAL SYSTEM CONFIGURATIONS:
The following is intended to give a rough guideline of system configurations that are possible with the
VOH-641 / 642 series Drop Down Video Systems:
System 1: Video Monitor without tuner (VOH-641), VCP.
-All wiring necessary is included with this package.
-Headphones are connected into the headphone jacks on the monitor itself.
System 2: Video Monitor with tuner (VOH-642), VCP
-Same as system 1, but TV antenna must be added (AN-200 or similar).
System 3: Video Monitor (VOH-641), VCP, 2nd VCP (or other A/V component)
-Same as system 1 but extra Source Component (PN 8010730) Harness must be pur-
chased.
System 4: Video Monitor / TV (VOH-642), VCP, 2nd VCP (or other A/V component)
-Same as system 3, but TV antenna must be added (AN-200 or similar).
Notes:
-All systems have built-in game/camcorder inputs (the A/V input jacks on the video monitor itself).
-There are a few audio output options that can be added as follows:
a) Remote headphone jacks can be added to a VOH-641 system. Refer to the wiring diagram on p6.
b) Additional speakers can be added to a VOH-642 system using the speaker outputs. Refer to the
wiring diagram on p7.
-The VOH-641 / 642 video systems are only intended for an overhead, drop down installation. It is not
intended for seat back or any other type of mounting. The hinging mechanism is designed for horizontal,
drop down use only.
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VEHICLE PREPARATION:
1) Locate a constant power source (+12v at all times) and an accessory power source (+12v when
key is in the acc. and run positions, and 0v when key is off). Generally, these wires can be found
at the ignition switch or fusebox.
2) The mounting method and location will vary from vehicle to vehicle, so this manual will only focus
on the installation of the video monitor and related console accessories.
3) Generally, the best location for the video monitor is where the vehicle's factory dome light is
installed. The monitor should be located in such a manner that it can be comfortably viewed by
rear seat passengers. NEVER INSTALL THE MONITOR IN A PLACE WITHIN THE DRIVER'S
VIEW. THIS IS NOT ONLY DANGEROUS, BUT IT IS ALSO ILLEGAL IN MANY STATES
4) Once the mounting location of the monitor has been determined, there may be additional prepara-
tion work necessary, depending on the vehicle structure and installation method. Some of the
steps that may be required are:
A) Removal of the vehicle's dome light
B) The headliner may need to be trimmed as per the drawing below
C) If the mini-console (PN 1181300) will be used, it will have to be trimmed to fit the
contour of the vehicle's headliner. Refer to the "Mini-Console installation" section
later in this manual.
Note:
If your installation will require you to cut out the headliner, the box that this kit came in can be used as a
template. You can remove the shelf that the video monitor rests on and trace the opening onto the
headliner for cutting
4
Figure 3
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FULL SIZE CONSOLE INSTALLATION
There are several “full size” custom consoles available for selected vehicles. Some of
these vehicles are the Chevrolet Suburban, Ford Expedition, and Dodge Durango. These full
size consoles incorporate several additional features, and are particularly useful if the vehicle
you are installing this system into already has an OEM overhead console in the headliner.
Refer to the installation manual that comes with the console itself for complete installation
instructions.

MINI CONSOLE INSTALLATION:
This page only covers special installation considerations for the mini console installation. If the video
monitor is to be installed with a custom full sized overhead console, refer to page 3.
If the video monitor is to be installed in a vehicle with the mini console (part number 1181300), this console
may need to be trimmed to fit the contour of the vehicle headliner.
1) In this installation, the video monitor is mounted directly to the overhead crossmember in the roof
using the mounting screw bosses. These screw bosses should contact the crossmember directly
(i.e.: no gap between the screw boss and the roof structure). Also, be sure that the screws do not
pierce the outer roof skin when fully fastened to the crossmember. The mini console is attached
to the video monitor using the perimeter screw bosses. It is important that the screws used in this
installation are not overtightened, and that the video monitor and mini console are mounted in
such a way that the assembly does not distort (or bend) when the mounting screws are tightened.
An alternate method is to use a piece of plywood (5"x9"x3/4"). First secure the plywood block to
the crossmember, then screw the monitor into the plywood. See the drawing on p5.
2) It is best to mount the video monitor to the roof structure without the mini console first. There
should be a gap between the headliner and the outer flange of the video monitor. The mini
console should be cut to full this gap. Apply masking tape to the outer surface of the mini console
in the areas where the cut will be made.
3) Mark the cut to follow the necessary contour of the roof. The suggested method of marking is as
follows:A) First mark the narrowest point of the mini console on the masking tape. Be careful
to consider not only vertical location, but fore-aft location.
B) Using the handle of a screwdriver, make a “transfer marking tool” See diagram
below. Place the tool against the roof, and the marker against the masking tape on
the mini console. Trace the cut to be made around the entire perimeter of the mini
console.
C) Cut the mini console using a sharp utility knife or shears. Make the cut in several
passes over the marked line, each time cutting a little deeper. It is not necessary to
cut completely through the plastic, the cut only need be over 50% of the wall thick-
ness of the plastic. By bending the cut back and forth several times, the plastic will
break cleanly at the cut.
D) Check the fit of the trimmed console and make any minor adjustments necessary.
4) The mini console can be painted or covered with a material that matches the headliner before
assembling the mini console to video monitor.
5) The finished mini console should be attached to the video monitor, then attach the assembly to the
roof.
Tape marker to screwdriver starting at
your mark for the lowest point, then
trace the contour of theroof
Cut Line
Headliner
Lowest Point Mark
Referto Fig 7 for detail on attaching
console to video pod and video pod to
vehicle structure.
Figure 6
Tape marker to screwdriver. Starting at your mark
for the lowest point, trace the contour of the roof
Lowest point mark
Cut line
Headliner
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Roof
Roof support
Headliner
5"x9"x3/4" Plywood
Block
(4) #8x1" self drilling
screws (not supplied)
Mini-Console
Video unit
(4) #8 Flat washers
(not supplied)
(4) #8x3/4" self tapping
screws (not supplied)
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MOUNTING THE MINI CONSOLE

1) Make the connections to the vehicle for the 12 pin wiring harness.
2) Remove screws on PCB Cover. Open the cover to gain access to Mini-Din Connector on main PCB.
3) Insert the Circular Mini-Din Connector of the source component harness through the wire tie loop on
the main PCB and into the Mini-Din Connector on the main PCB
4) Pull the wire tie loop tight and cut off the excess.
5) Connect the 12 pin harness to the mating connector on the Video Monitor.
6) Connect the wired RF Modulator and / or the remote headphone jacks to the video monitor if those
options are being included.
7) Connect power harness to vehicle’s electrical system by tapping into an accessory hot line.
8) Reinstall PCB cover using the 2 screws.
9) Verify all functions of the System before final mounting of the finished assembly.
Note: A second VCP or other A/V Component can be connected to the video monitor system using a
second source component harness (purchased separately, part number: 8010730). This second har-
ness would plug into the second Mini-Din connector on the main PCB as in steps 2 and 3 above.
A/V Source Definitions:
1= VCP (Right Mini Din on main PCB)
2= 2nd VCP (or game or DVD, etc.…. left Mini Din)
3= Aux Input (RCA jacks on the face of the monitor).
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Red RCA (Audio Right)
IR LED:
Clean the IR Receiver Window on the front of the VCP.
Remove Adhesive Backing and Apply IR LED to IR
Window on the Face of the VCP.
Black
(Ground)
Optional Remote Headphone Stations
Stereo
Headphone Jack
Stereo
Headphone Jack
Gray
(Left+)
Green
(Right+)
Yellow RCA (Video)
White RCA (Audio Left)
Red: +12 VDC
(Accessory Cir.)
Power Harness
Item # 3a
Black: Ground
Note: cables
exiting the pod
should be routed
as shown.
Mini-Din Connectors
"Y" Adapter
for use with
Non-Stereo
Installations
Item# 3b
Wireless FM Modulator
Antenna
choke
12 VDC Power and Ground
1070610
FM
Modulator
Auxillary
video display
Optional Hard Wired FM Modulator Output
*Refer to Instructions with the RF
Modulator Kit for further details.
TO
OPTIONAL
ADDITIONAL
MOINTOR
TO
FACTORY
RADIO Dash Radio
12 VDC Power and Ground
Am/Fm
Antenna
LINE
OUT
VIDEO
Patch Cord
RCA-Female
To Secondary AV Monitor
INPUT
VIDEO
Right
Input
RCA-Female
Left
Input
RCA-Female
Patch Cord RIGHT
RED
LEFT
WHITE
RCA Male to Male
Accessory
Harness
Item# 2
Accessory
Harness
Item# 1
21
VOH-641
4
2
2
5

Antenna
Dash Radio
Red RCA (Audio Right)
IR LED:
Clean the IR Receiver Window on the front of the VCP.
Remove Adhesive Backing and Apply IR LED to IR
Window on the Face of the VCP.
Black
(Ground)
Optional External Speakers
Gray
(Left+)
Green
(Right+)
Accessory
Harness
Item# 2
Yellow RCA (Video)
White RCA (Audio Left)
LEFT
WHITE
RIGHT
RED
Red: +12 VDC
(Accessory Cir.)
Power Harness
Item # 3a
*Refer to Instructions with the RF
Modulator Kit for further details.
FM
Modulator
Optional Hard Wired FM Modulator Output
12 VDC Power and Ground
Black: Ground
Right
Input
Left
Input
Note: cables
exiting the pod
should be routed
as shown.
Mini-Din Connectors
TV antenna
(If applicable)
"Y" Adapter
for use with
Non-Stereo
Installations
Item# 3b
To Secondary AV Monitor
Auxillary
video display
12 VDC Power and Ground INPUT
VIDEO LINE
OUT
VIDEO
TO
FACTORY
RADIO 1070610
Wireless FM Modulator
Antenna
choke
Am/Fm
TO
OPTIONAL
ADDITIONAL
MOINTOR
RCA-Female
RCA-Female
Patch Cord
21
Accessory
Harness
Item# 1
RCA-Female
Patch Cord
RCA Male to Male
1) Make the connections to the vehicle for the 12 pin wiring harness.
2) Remove screws on PCB Cover. Open the cover to gain access to Mini-Din Connector on main
PCB. (Cover will remain attached at to rivet hole).
3) Insert the Circular Mini-Din Connector of the source Component Harness through the wire tie loop
on the main PCB and into the Mini-Din Connector on the main PCB.
4) Pull the wire tie loop tight and cut off the excess.
5) Connect the Power Harness to the mating connector on the Video Monitor.
6) Connect the wired RF Modulator and / or the remote headphone jacks to the video monitor if those
options are being included.
7) Connect power harness to vehicle’s electrical system by tapping into an accessory hot line.
8) Reinstall PCB cover using the 2 screws.
9) Connect and mount the Television antenna, or optional diversity antennas.
10)Verify all functions of the System before final mounting of the finished assembly.
Note: A second VCP or other A/V Component can be connected to the video monitor system using a
second Source Component Harness (purchased separately, part number: 8010730). This second
harness would plug into the second Mini-Din connector on the main PCB as in steps 2 and 3 above.
A/V Source Definitions:
1= VCP (right Mini Din on main PCB)
2= Tuner
3= 2nd VCP (or game or future DVD, etc.…. left Mini Din)
4= Aux Input (RCA jacks on the face of the monitor).
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VOH-642
2
5
4
2

Red / black - Lamp on
Black / red - Lamp common
Purple / brown - Lamp Auto
To 12 pin
connector
on Monitor
To
constant
+12vdc
To
constant
+12vdc Factory Door ajar
switch or Body
Control computer
Factory Dome light circuit
Positive Switched Dome lighting
-8-
CONNECTING THE DOME LIGHTS
The dome lights in the video monitor require three connections to the vehicle's wiring. There are
two common types of dome light circuits used, positive or negative switched. Positive systems supply
voltage to the interior lights to turn them on, negative switched systems apply ground to illuminate the
bulbs. To determine which system you have you must locate the wires at the dome light. On a positive
switched system, with all the doors closed and the lights out, both wires at the dome light will rest at
ground. When the light is activated, one of these wires will switch to +12 vdc. This is the vehicle's
switching wire. On a negative switched system, with all the doors closed and the lights out, both wires at
the dome light will rest at + 12vdc. When the light is activated, one of these wires will switch to ground.
This is the switching wire.
For positive systems, connect the purple / brown (Lamp auto) wire to the vehicle's switched wire.
Then connect the red / black (lamp on) wire to a fused constant 12 volt source and the black / red (lamp
common) wire to a good ground. Positive systems are commonly found on Ford vehicles.
For negative systems, connect the purple / brown (Lamp auto) wire to the vehicle's switched wire.
Then connect the red / black (lamp on) wire to a good ground and the black / red (lamp common) wire to
fused constant 12 volt source. Negative systems are commonly found on General Motors and import
vehicles.
Note: Some vehicles which incorporate transistorized control of the dome light circuit, such as the 1999
Dodge Caravan, may require that the purple / brown (Lamp auto) wire be connected to the door pin switch
wire, as the additional current draw of the Monitor's lights may not be supported by the output of the
vehicles body control computer.

Troubleshooting:
Symptom:
No power at Video Monitor
Powerbut novideo orsound
Picture, but no sound
Staticon TVStations(Tuner
Version Only)
No Infrared remote func-
tionsforVCP(or other com-
ponents)
Remedy:
-Verify +12 VDC on Red wire at 2 pin Power Harness behind video moni-
tor. Verify groundconnectionwithcontinuitytestfromknowngoodground
to black wire at 2 pin Power Harness
-Verify that the correct source is selected (i.e.: 1,2,3 or 4). Verify that the
sourceison and playingaknowngood media (suchasa videotape). Verify
connections at both ends of the source component harness.
-Pushand hold thevolumeup buttonuntilsound isheardover headphones.
If problem is limited to the dash radio, verify radio is tuned to the correct
channel, and that power to the wired RF modulator is on. (Refer to instruc-
tions with modulator kit). Otherwise, verify all connections per the wiring
diagram on p5 and p6.
-Press Auto Program button. Then press CH up or CH down. Verify an-
tenna mounting and connections to the tuner.
Note: Due to the nature of TV signals, vehicle motion, direction the vehicle
is facing, distance from the transmitter, nearby surroundings and weather
may adversely affect TV reception. These conditions may result in the
following: picture roll, "snowy" picture, or momentary loss of color.
-Check batteries in the hand held remote (not included with this kit). Verify
that the IR LED ( p6 or p7 Wiring Diagram) is property attached to the
sensor window of the VCP (or other component).
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Negative Switched Dome lighting
To 12 pin
connector
on Monitor
To
constant
+12vdc
To
constant
+12vdc
Factory Door ajar
switch or Body
Control computer
Factory Dome light circuit
Red / black - Lamp on
Black / red - Lamp common
Purple / brown - Lamp Auto

128-5533C
1999 Audiovox Corp. 150 Marcus Blvd. Hauppauge, NY 11788