Audiovox Car Video System VOH 642 User Manual

VOH-641Drop Down Video Monitor  
VOH-642 Drop Down TV / Video Monitor  
ON  
OFF AUTO  
OPEN  
Installation Guide  
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)  
1  
O
OFF AUTO  
O
6  
7
3
2
3
8
rs  
oval of panels as necessary)  
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)  
-1-  
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  
in such a manner that it will not be pinched when all components and interior trim are fully installed. 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.  
Video Monitor with tuner (VOH-642), VCP  
System 2:  
System 3:  
-Same as system 1, but TV antenna must be added (AN-200 or similar).  
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.  
-2-  
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)  
3)  
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.  
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  
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:  
4)  
A)  
B)  
C)  
Removal of the vehicle's dome light  
The headliner may need to be trimmed as per the drawing below  
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  
Figure 3  
4
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.  
-3-  
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.  
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.  
2)  
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)  
D)  
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.  
Check the fit of the trimmed console and make any minor adjustments necessary.  
4)  
5)  
The mini console can be painted or covered with a material that matches the headliner before  
assembling the mini console to video monitor.  
The finished mini console should be attached to the video monitor, then attach the assembly to the  
roof.  
Headliner  
C
Cut line  
Lowest point mark  
T
Tape marker to screwdriver. Starting at your mark  
for the lowest point, trace the contour of the roof  
-4-  
MOUNTING THE MINI CONSOLE  
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)  
-5-  
Note: cables  
exiting the pod  
should be routed  
as shown.  
VOH-641  
Power Harness  
Red: +12 VDC  
(Accessory Cir.)  
Mini-Din Connectors  
4
Item #
choke  
Black: Ground  
Optional Hard Wired FM Modulator Output  
2
1
RCA-Female  
12 VDC Power and Ground  
Left  
Input  
Am/Fm  
Antenna  
LEFT  
FM  
WHITE  
TO  
FACTORY  
RADIO  
Patch Cord  
Modulator  
1070610  
*Refer to Instructions with the RF  
Modulator Kit for further details.  
RIGHT  
RED  
Right  
Input  
Dash Radio  
RCA-Female  
To Secondary AV Monitor  
Accessory  
Harness  
Item# 2  
Accessory  
Harness  
Item#
2
RCA-Female  
TO  
OPTIONAL  
ADDITIONAL  
MOINTOR  
INPUT  
VIDEO  
12 VDC Power and Ground  
LINE  
OUT  
VIDEO  
Auxillary  
video display  
Red RCA (Audio Right)  
Patch Cord  
RCA Male to Male  
White RCA (Audio Left)  
Yellow RCA (Video)  
"Y" Adapter  
for use with  
Non-Stereo  
Installations  
Item# 5
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.  
Optional Remote Headphone Stations  
Stereo  
Green  
(Right+)  
Headphone Jack  
Stereo  
Headphone Jack  
Black  
(Ground)  
Gray  
(Left+)  
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).  
-6-  
Note: cables  
exiting the pod  
should be routed  
as shown.  
VOH-642  
Power Harness  
Item 4
Red: +12 VDC  
(Accessory Cir.)  
Mini-Din Connectors  
choke  
Black: Ground  
TV antenna  
Optional Hard Wired FM Modulator Output  
2
1
RCA-Female  
12 VDC Power and Ground  
Left  
Input  
Am/Fm  
Antenna  
LEFT  
FM  
TO  
FACTORY  
RADIO  
WHITE  
Patch Cord  
Modulator  
1070610  
*Refer to Instructions with the RF  
Modulator Kit for further details.  
RIGHT  
RED  
Right  
Input  
Dash Radio  
RCA-Female  
To Secondary AV Monitor  
Accessory  
Harness  
Accessory  
Harness  
Item2
RCA-Female  
TO  
OPTIONAL  
ADDITIONAL  
MOINTOR  
INPUT  
VIDEO  
12 VDC Power and Ground  
Item
2
LINE  
OUT  
VIDEO  
Auxillary  
video display  
Red RCA (Audio Right)  
White RCA (Audio Left)  
Yellow RCA (Video)  
Patch Cord  
RCA Male to Male  
"Y" Adapter  
for use with  
Non-Stereo  
Installations  
Item5
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.  
Optional External Speakers  
Green  
(Right+)  
Black  
(Ground)  
Gray  
(Left+)  
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).  
-7-  
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.  
Positive Switched Dome lighting  
To  
constant  
+12vdc  
Red / black - Lamp on  
To 12 pin  
Black / red - Lamp common  
connector  
Purple / brown - Lamp Auto  
on Monitor  
Factory Dome light circuit  
To  
constant  
+12vdc  
Factory Door ajar  
switch or Body  
Control computer  
-8-  
Negative Switched Dome lighting  
Red / black - Lamp on  
Black / red - Lamp common  
Purple / brown - Lamp Auto  
To 12 pin  
connector  
on Monitor  
To  
constant  
+12vdc  
Factory Dome light circuit  
To  
constant  
+12vdc  
Factory Door ajar  
switch or Body  
Control computer  
Troubleshooting:  
Remedy:  
Symptom:  
-Verify +12 VDC on Red wire at 2 pin Power Harness behind video moni-  
tor. Verify ground connection with continuity test from known good ground  
to black wire at 2 pin Power Harness  
No power at Video Monitor  
-Verify that the correct source is selected (i.e.: 1,2,3 or 4). Verify that the  
source is on and playing a known good media (such as a videotape). Verify  
connections at both ends of the source component harness.  
Power but no video or sound  
Picture, but no sound  
-Push and hold the volume up button until sound is heard over 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.  
Static on TV Stations (Tuner  
Version Only)  
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).  
No Infrared remote func-  
tions for VCP (or other com-  
ponents)  
-9-  
128-5533C  
1999 Audiovox Corp. 150 Marcus Blvd. Hauppauge, NY 11788  

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