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Troubleshooting Guide
Ifthe remote A BUS modules do not operate at all:
- Verify all connections between the remote modules and the ABH 4
- Check the RJ 45 connection between the ABH 4 and the host receiver
(A BUS/
READY systems)
-Check the AC power connection at both the ABH 4s Power jack and on
the Power Supply
If the remote modules status LED is lit but there is no sound:
-Make certain that an active source has been selected on the host receiver
-Check the RJ 45 connection between the ABH 4 and the host receiver
(A BUS/
READY systems)
-Check the audio connections between the ABH 4 and the host receiver
(non A BUS/
READY systems)
For additional troubleshooting information and updated operational and installa
tion hints, please visit the Product Support section of the Harman Kardon Web
site at www.harmankardon.com.
Specifications
ABH 4 Dimensions (D x W x H):
3 5/16" x 7 3/16" x 1 3/16" (83mm x 184mm x 30mm)
Weight: 0.9 lb (410g)
Power Supply Dimensions (D x W x H):
2 13/16" x 5 15/16" x 1 7/16" (70mm x 151mm x 36mm)
Weight: 1 lb (450g)Power Supply Input: 108 - 264 VAC, 115 watts
Power Supply Output: 24 volt, 4 amp supply included
Status Power: 12 volts, 200ma
Wiring protocol for A BUS connections: TIA wiring specification for TIA 568A
Operation
When the installation is complete and all connections have been made to the
ABH 4 and receiver, processor or preamplifier, and the A BUS modules have
been properly installed in the remote rooms, operation of the ABH 4 is simple.
There are no user controls on the ABH 4.
After checking the connections, plug the AC power cord from the ABH 4s Power
Supply into a non switched AC outlet and turn on the host receiver, processor or
preamplifier. Operation of the ABH 4 is seamless, as the remote A BUS modules
will communicate directly with the host source.
When the ABH 4 is used with an A BUS/
READY receiver, the A BUS modules in
the remote room operate as if they were connected directly to the host receiver.Nofurther controls are needed. Follow the instructions included with the A BUS
modules for operation information.
When the ABH 4 is used in the stand alone mode with a source that is not
A BUS/
READY , the method of operation varies depending on the specifics of the
installation:
-When a 12 volt adaptor is not connected to the ABH 4s
Status Input ¡ ,
the system is able to pass through IR commands from the remote modules
to turn on the host receiver, processor or preamplifier, but there is no power
to a remote modules internal amplifier until an audio signal is sensed at the
ABH 4s
Audio Inputs £ .
-When a 12 volt adaptor is connected to the ABH 4s
Status Input ¡ ,the
system is ready for full operation at all times, including pass through of IR
commands from remote A BUS modules as well as power to the remote
modules internal amplifiers.
The three LED indicators on the ABH 4 signify the following operational modes:
Status Indicator å lights when the system is activated either by con
nection to an A BUS/
READY receiver that is turned on, when a signal is sensed
at the
Audio Inputs £ or when a 12 volt power source is connected to the
Status Inputs ¡ . This light indicates that the remote modules are active and
ready to accept and transmit commands.
-The
Power Indicator - lights when the AC Power Supply is connected to
the ABH 4 and/or when a connection is made between the ABH 4 and an
A BUS/
READY receiver.This light indicates that the system is powered on and
is operational.
- The
IR Indicator ç flashes whenever an IR command is transmitted through
the system.
Optional Step Five: Status Power Connection
Ifyour system requires that the remote A BUS models are active and able to
receive commands when the host receiver, processor or preamplifier is not
turned on, connect an optional power supply to the
Status Input ¡ .The
power supply is the small type typically used to power portable electronics
products and should provide a nominal 12 volts DC at 200 mA, using a
standard 2.1 plug with Center Positive.
Optional Step Six: Connect IR Emitters
Ifyou are not using direct IR control connections to IR In jacks on products
by Harman Kardon and wish to control a receiver, processor or preamp, or a
source product such as a CD or DVD player, connect optional IR emitters to the
IR Emitter Jacks ¶ and then place them over the IR sensor on the front
panel of the unit to be controlled in accordance with the emitter manufacturersinstructions.
Optional Step Seven: Remote IR Sensor Connection
If the source and control equipment is behind cabinet doors or dark glass and
you wish to have an optional IR sensor in the main listening room control those
products, connect that sensor (not included) to the
Local IR Input Terminals
§ .To make the installation easier, the black connector block may be removed
by grasping the top and bottom of the block and pulling it out toward you.
Reinstall it after the connections are made by simply pushing it back into the
socket.
When using an optional IR receiver (not supplied) the connections are as follows:
ABH 4 Local IR
Connection Point Sensor Connection Point
V+ +12VSIG IR OUT
GND GND
NOTE: The STAT connection is not used in standard installations.
If you are not familiar with the use of external IR sensors in systems integration
applications,we strongly recommend that a trained custom installer perform the
installation.
Connections to a Non A BUS/ READY Product
The ABH 4 may also be used to bring the benefits of A BUS technology to
audio systems that are not A BUS/
READY . To do this, a few additional steps are
required to connect an audio feed and to install any required infrared emitters
that are used to control the source equipment. Although this installation is rela
tively simple, you may wish to have it completed by a trained installer who is
familiar with A BUS and audio/video systems integration.
Step One: Connect an Audio Source
Connect the audio outputs of the source that will be used to feed the A BUS
modules by using a standard audio interconnect cable (not included) connecting
the
Audio Inputs £ on the ABH 4 to the audio outputs of the source device.
The source may be the tape outputs of a stereo preamplifier or receiver, the tape
outputs or multiroom outputs of an audio/video receiver or surround processor,
or it may be a direct connection to a single source such as a CD player or tuner.
Step Two: Connect the A BUS Modules
Connect the RJ 45 jacks on the Cat. 5 cabling that runs to the remote room
modules to the
A BUS Outputs - on the ABH 4. Make certain that the con
nector is wired in accordance with the standard TIA 568A color coding. Connect
the A BUS modules in the remote rooms to the cable in accordance with the
instructions for the module.
Step Three: Connect the AC Power Supply
Connect the AC Power Supply furnished with the ABH 4 to the Power Input
- . Plug the AC power cord into the socket on the Power Supply. Do not
connect the power cord to an AC outlet at this time.
Optional Step Four: Multiple ABH 4 Connections
If you are using more than one ABH 4 in a system, connect the Expansion Out
Jack
- to the Expansion In Jack ¢ on another ABH 4, using the RJ 45
jumper cable supplied with the second ABH 4. Then, follow steps two and three
as shown above.
NOTE: The following steps provide additional options that extend the flexibility of
your A BUS system. If you are not familiar with audio/video systems installations,
you may wish to have them completed by a properly trained installer.
Harman Kardon and Power for the Digital Revolution are registered trademarks of Harman International Industries,Incorporated.
A BUS and A BUS/ READYare registered trademarks of LeisureTech Electronics Pty Ltd. Australia.
All features and specifications are subject to change without notice.
250 Crossways Park Drive,Woodbury, New York 11797
516.422.HKHK (4545) Fax: 516.682.3523
©2005 Harman International Industries, Incorporated. All rights reserved.
Printed 3/05 Part No. ABO 42hl
ABH 4
4 Room A BUS ® Expansion Hub
Top Edge Connections
¡ Status Input
- Power Input
£ Audio Inputs
¢ Expansion In Jack
- Expansion Out Jack
Bottom Edge Connections
§ Local IR Input Terminals
¶ IR Emitter Jacks
- A BUS Outputs
LED Indicators
å Status Indicator
- Power Indicator
ç IR Indicator
ABH 4 OM (Large) 3/24/05 4:50 PM Page 2 Power for the Digital Revolution.® ® Optional AB 1
A BUS
modules
connected
by Cat. 5
cablingWhen using the ABH 4 with
non A BUS/READY receiv ers,
connect eithe r the Multi room ou tputs
(if a vailab le) o r the Tape outputs to
the Audi o Input ¢ jacks on the A BH 4.
DVD playe r or othe r sou rce component with
connection to co mpatible IR input jack Connect to either the Multi room
or the Tape outputs , but not both.
Optional
IR se nsor Optional 1 2V
power supp ly240
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IR emitte r placed o ver IR se nso r
ABH 4
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