3. Mounting the ADD-96 board assembly.
•Mount ADD-96 assembly to chassis using six
6/32 by 3/16”pan head screws.
•Connect switch assemblies to ADD-96 board.
•44.1K/48K switch assembly to SW1 3 pin
header.
•X1/X2 switch assembly to SW3 three-pin
header. This is the switch in the middle of the
switch/LED assembly.
•Note that the SW1 and SW3 connections are
dependent on the orientation of the connector.
Tracing the wires from the connector up to the
switch will help in connecting the correct way.
Monitor the clock or AES data output and be
sure the switches make the correct changes in
frequency while the unit is in internal clock
mode. If not, rotate connector 180
o
•Plug DB25 assembly to header J10.
•Clock out BNC to J16. This is the BNC
connector closest to the LED.
•Clock in BNC to J13.
4. Modifying the HV3 pre amp cards.
•Remove the front panel from the unit using a
3/16” Allen wrench. Remove the center screw
from the center of the front panel on the inside
of the chassis. Put the front panel in a safe
place.
•Remove the power supply harness from each
pre amp card if not already removed.
•The input and output signal cables can remain
connected during this modification.
•Remove each of the pre amp cards by removing
the knob using a 1/16” (if there are two set
screws) or 5/64” (if there is only one set screw)
Allen wrench, removing one screw going through
the front panel of the chassis, and two screws
on the bottom of the chassis per card.
•Lift out the pre amp card to get access to the
lower right corner of the card.
•Remove R53 and R54 from each pre amp card.
Replace with solid wire jumpers. R53/R54 are
located on the lower right area of the pre amp
card, next to the J5 connector
•Plug in Molex power supply cable assembly.
Start with the power connector for pre amp
card number one. Continue for the
remaining seven pre amp cards, then the
power supply circuit board and lastly the
power connector for the ADD-96 card,
connector J10. See picture.
Figure 6
5. Connecting the pre amp cards to the
AD-D96.
•Note the colors of the wires at the Molex
plugs. The wire in the center position is the
+ signal. This + signal goes to J5 pin 2 on
each pre amp card. J5 pin 2 is the pad that
connects to the end of the jumper in the
R54 position. Connect the other
–signal wire to J5 pin 1. Pin 1 is usually the
square pad and connects to the jumper in
the R53 position on each pre amp card.
•Solder the two wires to each pre amp card.
Note the color coding, and which hole in J5
of the pre amp card each color is soldered
to. Route wires to left side of the ADD-96
card as viewed from the front of the unit.
Wires should sit between the back of the
pre amp cards and the side of the ADD-96
card facing the front of the unit.
•See picture for wire Routing.
Figure 7
