Clarion OHMD74 Service manual

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Welcome!
Thank you for purchasing the Clarion OHMD74 overhead monitor system. This
monitor is engineered with advanced technological designs and components for the
best picture quality and convenience.
Warning!
The Clarion OHMD74 overhead monitor system is designed strictly for rear-seat
entertainment. Viewing the monitor while operating a motor vehicle can result in
serious injury and/or property damage. Clarion is not responsible for any injury and/or
property damage as a result of the improper use or viewing of the monitor.
Features:
• 7” Wide-Screen Flip Down Monitor with TFT Active Matrix Display with 16:9/4:3 format
• Built-in CD/DVD/MP3 Player
• Selectable screen modes: Normal, Zoom, Full, and Wide Screen
• 1 - Audio/Video input
• Audio/Video Game Port
• Video output for additional monitors
• Front panel menu, picture, source, and DVD controls
• OSD (On-Screen Display)
• Built-in IR transmitter for WH104 wireless headphones (2 headphones included)
• FM modulator control (FM200 not included)
• Built-in dome lights
• IR remote control
• Supports both NTSC and PAL video formats
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Introduction
The Clarion OHMD74 is a full-featured overhead entertainment center featuring
DVD, CD, and MP3 playback. This system combines flexibility, reliability, and
expandability all in one. Designed primarily for rear seat entertainment, the audio
from the OHMD74 can be enjoyed privately through wireless headphones and/or
incorporated into any head unit. And with the ability to access all the features
and functions through an IR remote control, the rear passengers won’t have to
leave the comfort and safety of their seats.
Since Clarion has always been an innovator in the mobile entertainment industry,
a lot of responsibilities follow suit. One of the major emphasizes incorporated
into the OHMD74 is reliability. This was achieved by using high-grade electronic
components and heightened electronic connections. As the mobile environment
is extremely harsh, these technological advances insure years of unrelenting
operation.
Given that the OHMD74 is the centerpiece of the entertainment center, it
features a built-in A/V switcher allowing for multiple A/V sources to be added.
Included with the OHMD74, is a Game Port Station, which also can be used for
a temporary device, such as a camcorder or game station, to be enjoyed in the
vehicle.
With everything that Clarion has to offer with the OHMD74, it truly lives up to
Clarion’s motto, BE SEEN, BE HEARD!
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FCC Approval
The Clarion OHMD74 have been tested and found to comply within the limits of
a Class B digital device, pursuant of Part 15 of the FCC rules. These limitations
are designed to provide reasonable protection against harmful interference in
a vehicle installation. This equipment generates and uses radio frequency
energy and if not installed and used in accordance with the instructions, it may
cause harmful interference to radio communications.
There is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to a radio or television
reception, turn off the equipment and contact a local Clarion dealer for
assistance. Changes or modifications to this product not approved by the
manufacturer will void the warranty and violate FCC Approval.
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Table Of Contents
Introduction and Precautions . . . . . . . . . . . . 2-6
Care and Maintenance . . . . . . . . . . . . . . . . . 6-8
Operating OHMD74 Monitor . . . . . . . . . . . . . 9-16
About Disc Formats . . . . . . . . . . . . . . . . . . . 17-18
Operating the Remote Control . . . . . . . . . . . 19-21
Changing Display Settings . . . . . . . . . . . . . . 22-28
Replacing the Remote Battery . . . . . . . . . . . 29
Operating the Headphones . . . . . . . . . . . . . 30
Installation Instructions . . . . . . . . . . . . . . . . . 31-37
Package Contents . . . . . . . . . . . . . . . . . . . . 38
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 39-40
Specifications . . . . . . . . . . . . . . . . . . . . . . . . 40
Warranty Information . . . . . . . . . . . . . . . . . . 41-42
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Precautions
• This overhead monitor system is designed for use in 12V DC negative
ground vehicles.
• Do not operate the overhead monitor system in ways other than described in this
manual. Doing so may result in damage to the monitor system and/or the vehicle,
voiding the warranty of this product.
• SAFETY FIRST! This overhead monitor system is designed for rear-seat
entertainment only. Do not install in/on dashboard or anywhere else that would
allow the operator of the vehicle to view the monitor.
• Do not disable or modify the overhead monitor system. Doing so may damage the
monitor system, and void the warranty.
• Keep all liquids away from the overhead monitor system.
• Do not leave the overhead monitor system open when not in use. Direct sunlight can
cause the monitor not to function properly.
• In extreme cold temperatures, the movement of the picture may appear to move slow
and dark. The overhead monitor system will function properly once the temperature
rises.
• Do not hang or hang items from overhead monitor system.
If you have any questions or problems concerning the monitor that are not cover
in this manual, please consult a local Clarion dealer for assistance.
Before installing this overhead monitor system, please check your local traffic
laws and regulations.
Care And Maintenance
Keep all liquids away from the OHMD74 overhead monitor system. Liquids inside the
monitor will damage the electronics, and can result in electrical shock or fire. In the
event that the unit should become wet, turn off the power and contact a local Clarion
dealer for assistance.
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To clean the monitor, use a clean soft cloth and gently wipe the screen. If possible,
use specially designed “monitor wipes” to clean the screen.
Handling Discs
Always handle a disc by its edges. Never touch the surface of the disc directly.
To remove inadvertent fingerprints and dust, use a soft cloth and wipe in a straight line
from the center of the disc to the outside edge. Never use liquid or aerosol cleaners,
anti-static spray, or thinner to clean the disc surface.
Do not place discs in the following places: direct sunlight; dirty, dusty and damp areas;
near car heaters; on the seats or dashboard. Avoid using adhesive labels on discs.
Servicing the OHMD74 Overhead Monitor System
In the event a problem arises with the OHMD74 overhead monitor system, do not
attempt to disassemble or repair the monitor yourself. Opening or attempting to service
the monitor will void the warranty; instead, contact a local Clarion dealer for assistance.
The internal parts are not serviceable by the user. The OHMD74 is a Class 1 Laser
product, using a laser which could cause hazardous radiation exposure if improperly
disassembled.
All warranty service should be performed by an authorized Clarion service center.
CAUTION! Changes or modifications to this product not approved by the manufacturer
will void the warranty and will violate FCC approval.
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Temperature and Moisture
If the player is used while the interior of the vehicle is very cold, condensation may
form on the disc or on the internal optical pickup system and prevent proper playing of
the disc. If you suspect that condensation is an issue, eject the disc and inspect the
playing surface. If necessary, remove the condensation with a clean soft cloth as
described above. If you still experience problems with playback, you will need to wait
for approximately one hour to allow the OHMD74 to warm up, and for the condensation
to evaporate. If playback issues continue, please see your authorized Clarion dealer.
Discs Compatible with OHMD74
The OHMD74 supports and plays DVD (Region 1), VCD, CD, CD-R, and MP3 formats.
Although the OHMD74 is designed to play DVD’s, DVD’s are manufactured to respond
to the particular Region Management Information they are created in. The OHMD74 is
compatible with Region 1 and “ALL” Region DVD’s.
The DVD/CD mechanism can accept both 5” (12cm) and 3” (8 cm) single sided discs. It
is recommend when “burning” your discs; to use CD-R’s versus CD-RW’s.
The encryption process on the CD-RW is not as deep, which can cause skipping
and/or error messages on the OHMD74.
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Disc Playback
DVD playback will often begin automatically when the disc is inserted. With some DVD
discs, you will need to press [ENTER] or [ ] to begin playback.
CD-Audio discs will begin playback automatically. CDs with MP3 files may
require you to navigate the file structure menu. For more information, see MP3
Playback on CD-R Discs.
Stopping Playback
There are two ways to stop playback: Pressing [ ] once will stop playback, and the
OHMD74 will store the location last played on the disc. Playback can be resumed at
the same point on the disc by pressing [ ]. Pressing [ ] twice will stop playback
and clear the OHMD74 memory of the last point played on the disc. Pressing [ ] at
this point will cause the OHMD74 to begin playback from the beginning of the disc.
Selecting a Track or Chapter
Selecting tracks or chapters can be accomplished by either using the IR remote
or front mounted controls. These controls allow the operator to skip over
undesired tracks or repeat a particular track.
Advancing Tracks / Chapter: Press the insert up arrow until desired track /
chapter is found.
Repeating Previous Tracks / Chapter: Press the insert down arrow until
desired track / chapter is found.
Note: For some VCD 2.0 discs, the insert up arrow and insert down arrow
functions may not be available.
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Discs Incompatible with OHMD74
The following disc types are incompatible with the OHMD74:
• DVD-ROM/ DVD-R/DVD-RW/DVD-RAM
• Photo CD/CD-RW
• CD-ROM(excluding most CD-Recordable discs using MP3 or CD-A Formats)
• Any DVD with a region number other than “1” and “ALL”
• CD audio manufactured with certain copyright methods
Note: 8cm discs are NOT compatible. Please do NOT insert 8cm discs.
DVD Regions
This digital media 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 the DVD disc does not correspond to the region number of this
player (Region 1), this player will not be able to play the disc. Some DVDs are
manufactured to operate in “ALL” zones, and those discs are compatible with the
OHMD74.
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