Operation; Troubleshooting Guide; Specifications - Harman Kardon ABH 4 Owner's Manual

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 4's 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/
the remote room operate as if they were connected directly to the host receiver.
No further 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/ , the method of operation varies depending on the specifics of the
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installation:
• When a 12-volt adaptor is not connected to the ABH 4's 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 module's internal amplifier until an audio signal is sensed at the
ABH 4's Audio Inputs £.
• When a 12-volt adaptor is connected to the ABH 4's 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:
• The Status Indicator å lights when the system is activated either by con-
nection to an A-BUS/ receiver that is turned on, when a signal is sensed
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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/ receiver. This light indicates that the system is powered on and
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is operational.
• The IR Indicator ç flashes whenever an IR command is transmitted through
the system.

Troubleshooting Guide

If the 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/ systems)
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• Check the AC power connection at both the ABH 4's Power jack and on
the Power Supply
If the remote module's 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/ systems)
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• Check the audio connections between the ABH 4 and the host receiver
(non-A-BUS/ systems)
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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.
receiver, the A-BUS modules in
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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
¡ ™
¡ ™
•
¡ ™
•
7
£ ¢ ∞
£ ¢ ∞
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
å
∫
ç
LED Indicators
å Status Indicator
∫ Power Indicator
ç IR Indicator
å
∫
ç
å
∫
ç