Service manual

Audioaccess
250 Crossways Park Drive
Woodbury, NY 11797
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TECHNICAL SERVICES
INFORMATION SHEET
PX 600
ALL IR Output / MRX Blaster IR Output
DECEMBER 8, 1999 (ORIGNINALLY TECHNICAL MEMO 9711) Page 1 of 1
PX-600 All IR Output.doc Page 1
DOC# AA092603 WB-TS / FB-CR
O
VERVIEW
The “All” and “Blaster” IR Output ports the on the PX-600 and MRX-NT may be used as an alternative or in
conjunction with the individual source IR control ports (ie: CD Tape AUX and Video) to control source
components in an Audioaccess system. As suggested by its name, these “all” output ports route all of the IR
codes that are learned by the PX 600 and MRX-NT. The dedicated IR outputs route only IR for a specific source.
Output voltages may be adjusted on both the PX-600 and MRX-NT for blaster or emitter settings. The following
are some suggestions of how these “ALL” outputs are used.
C
ONFIGURATION OF THE ALL IR O UTPUT
PX-600 - The All Output is factory configured for standard low power emitters but can be changed to drive a
blaster style emitter. To make this change, remove the top cover, and move the header jumper located on the
main board at P120, one position back towards the rear panel. The two positions are labeled Blaster and
Emitter.
MRX-NT - The ALL output of the MRX-NT is factory set for using high power blaster emitters. Functionally, the
IR output is identical to that of the PX-600. To modify this to a standard low power emitter port you must modify
the emitter being used. Using the positive supply wire, place a one 1K Ohm 1/4w 5% resistor in series with the
LED. This will cause a voltage drop across the resistor and will avoid damaging the emitter’s LED.
U
SING THE ALL IR O UTPUT
Application 1 – If using source components from a single manufacturer that contain control in/out ports, you
may use only the “ALL” out (emitter setting) and daisy chain the control signal to each of the source components.
This method eliminates the emitters on the front panel of the source gear and is easy to install. The source gear
must be opto-isolated. Opto-isolation indicates that the source component internally strips the IR carrier from the
control signal. If this is not the case, you may use the Xantech 794 and 797 series of interface modules for direct
connection between the PX-600 IR out and the source component’s control inputs. Using the “ALL” output is not
desirable if you wish to control two identical source components that use the same IR codes. In this case it is
better to use the dedicated IR ports that allow for independent control of identical sources.
Application 2 - Four additional source control functions are located in the video programming and may be
accessed using the Audioaccess RT-A remote. These extra control functions may be used by any source
component if you use the “ALL” control port to expand functionality of a given source. For example, in for a high
capacity CD changer, you may use the macro functions located in the HIGH CAPACITY CD Programming, and
also add extra transport functions located in the “Video” programming under Channel UP, Channel DN, Fast
Forward, and Rewind. Instead of connecting an IR emitter from the CD output, connect it to the “ALL” Output
port. These extra functions will then be available to the CD changer only when using the Audioaccess RT-A
remote. Only one source may use these additional functions.
Application 3 – The Zone 6 Macro incorporates a 10 step Video Enter Macro, 10 step Video Exit Macro, and
Volume Up and Down commands for controlling an external AV processor or receiver. The “All” or “Blaster”
output must be used to route the IR commands to the theater components. In some cases it may be necessary to
include a secondary IR repeater system connecting block which allows for multiple output connections to the
various components that need to receive IR control data. Alternatively, a Blaster style emitter may be used to
“spray” the room with the appropriate commands when this setting is selected.
Note – For any questions concerning the use of the “ALL” IR output, please contact our Technical Support
Department at 888-691-4171.