Protech Audio 704-IN - Manual (Page 2)

INSTALLATION
The Model 704 cards are designed to be mounted in the
Models 857B or 858B Card Frame Assemblies. The Model
857B will accomodate up to 10 audio cards, using an
external power supply (Model 66708), and the Model 858B
will accomodate or up to 9 audio cards, and uses a plug-
in power supply card The power supply card used in the
Model 858B card frame assembly is designed to deliver
600ma of power to a card frame.
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3- Terminate all audio input and output connections, using the
card connection drawing on the facing page. Double conductor
shielded cable is recommended for all audio connections.
Output connections should be made using 22AWG wire or
heavier.
4- Unpack each individual card, inspect for shipping
damage, and assuming none is found, slide the card
half-way into the appropriate slot. After all cards have been
installed half-way into the card frame, plug in one card at a time
and turn on the power supply. Make sure no unusual loading is
indicated at the power supply . If loading is noticed, turn off
the power supply, unplug the card and recheck terminations.
If no loading is noticed, continue inserting each card in the card
frame, checking power supply loading as each card is plugged
in. When all the cards have been plugged in, the installation
is complete, and all that
remains is the alignment.
ALIGNMENT
Each Modular Matrix Mixer card has been shipped from the
factory set for balanced line operation. If unbalanced operation
is desired, move red push-on jumpers on output cards.
1- On the input cards, place the bus selector DIP switch into the
desired bus group IC socket.
2- On the output cards, select inputs to appear on each output by
selecting that channel on the 8 position DIP switches.
3- On the output cards, if unbalanced operation is desired,
move the red push-on jumpers, over one pin.
4- Place the ribbon cable/connector assembly onto the front of
all Modular Matrix Mixer cards in the system.
This completes the installation and alignment of your Modular
Matrix Mixer Cards. The mixers may be expected to deliver
years of uninterrupted service.
The actual steps necessary for installation of the Modular
Matrix Mixer cards, are comparable to those necessary for any
of the Integra III System cards, with the exception of the linking
ribbon cable. They are as follows;
1- Mount the card frame in an appropriate EIA 19" width
rack, using 4 screws of sufficient strength to provide
secure mounting.
2- A determination has been made as to which type of power
supply will be used on your system. Follow the instructions for
the type of power supply you will be installing.
EXTERNAL POWERED CARD FRAME Model 857B.
If an external power supply (Model 66708) is being used,
terminate the supply connections to pins 1, 2, & 3 of the
DC barrier connector, as shown in the card frame layout
drawing, and the Model 66708 Installation and Operation
Manual. Turn on the power supply, and using a DC
voltmeter, check for correct voltage and polarity at pins 1,
2, & 3 of the DC barrier connector.
INTERNALLY POWERED CARD FRAME Model 858B
Plug in the external power transformer, and connect to card
frame. Plug in the power supply card, , and check for proper
illumination of both the positive and negative voltage LED's, on
the front of the power supply card.