Border Patrol Power Supply Installation Instructions.
Model: Audio Innovations series 700.
ELECTRICAL KNOWLEDGE IS REQUIRED IN ORDER TO PERFORM THIS CONVERSION SAFELY. POTENTIALLY LETHAL VOLTAGES ARE PRESENT. WE CANNOT BE HELD RESPONSIBLE FOR ANY ERRORS OR ACCIDENTS THAT MIGHT ARISE WHEN PERFORMING THIS CONVERSION. IF YOU HAVE ANY DOUBT ABOUT YOUR ABILITY TO PERFORM THIS CONVERSION SAFELY PLEASE CONTACT US FIRST.
CONTENTS. POWER SUPPLY, 4 WAY TERMINATED CABLE, RUBBER
GROMMET, HEAT SHRINK, IEC MAINS LEAD.
TOOLS REQUIRED. SOLDERING IRON, PLIERS, M4 ALLEN KEY, SCREW DRIVER, SOLDER, ELECTRIC DRILL AND 10mm BIT.
DISCONNECT THE AMPLIFIER FROM THE MAINS BEFORE BEGINNING. If the unit has been used recently, allow sufficient time for the power supply capacitors to discharge before beginning (15 mins is usually sufficient).
REMOVE THE VALVES TAKING CARE TO NOTE THEIR POSITION.
Installation of the power supply is completed in two stages. The first stage is the disabling of the on-board high voltage supply and the connection of the new off-board supply and the second stage is the connection of the relay to switch the new off-board supply on and off from your current on-off switch. Remove the knobs and the selector switch/ volume pots/mains switch mounting nuts (later units have these switches mounted on the under tray rather than the lid so removal of these nuts is not necessary). Remove the 4 Allen bolts securing the lid and taking care not to damage the mains switch remove the lid.
the two Red wires that come from the
mains transformer to the Bridge Rectifier and insulate
their ends with the heat shrink provided. Do
not remove or damage any of the other wires leading to
and from the board. Re-fit
the board using only the screws for Cap1.
Drill a 10mm hole either in the underside or the back of
the unit and fit the rubber grommet supplied. You may
find an existing hole that can be enlarged on the bottom
of the unit. Be careful not to damage any
internal components whilst drilling.
Feed the supplied cable through the hole and
secure in place with the cable ties provided. Feed one of
the left over stainless steel screws through the circular
tag on the RED cable, through the PCB
hole marked positive (+) and into the terminal of the Cap2.
Repeat for the GREEN cable with the
circular tag through the PCB to the negative (-) terminal
of Cap2. Screw down tightly ensuring
that the tags do not touch each other. You have completed the
attachment of the High Voltage supply.
DANGER: Check that the two circular connectors on the H.T. supply are not touching each other.
Dress the new cables tidily and replace the lid. Re-fit the selector switches and volume/balance pots if necessary, replace the valves and connect the umbilical lead to the new off-board supply. Replace the mains lead to both units. Switch on the Audio Innovations amplifier as usual. Your amplifier should now be ready to play. The valve supply will take longer to come up to operating voltage than the old supply but this will have the advantage of lengthening the life of the valves.
c/o Kaja Music Systems Waldorf Maryland USA
Phone/Fax +1 301 705 7460