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The method I’ve found easiest for the connection of the input wires is as follows.
Strip and dress one end of the hookup wires (ie. twist the strands together) and I recommend lightly tinning
these wires so the strands don’t fray out. Insert these ends through the corresponding vias and solder them
into the base PCB. Work carefully, in some cases there are some other components in close proximity to
these connections. Don’t install a fault while you’re at it! Inspect these joints carefully and clip off the excess
wire. If the Input board is to be installed as well, solder one of the red power wires to the +12SB point on the
buffer board. (this provides switched power to the Aux In board)
Note: If you’re installing BOTH PCBs, attach the wires for the Aux In board as well (description
further on). If the buffer board is mounted in place first, you can’t get to the points on the base unit
PCB to make the required connections.
In this photo the buffer input wires have been attached
to the relevant points, the “standby signal” wire (this
triggers the remote power output signal), and the red
and black wires connected to the +12v and ground
points. (note the ground connection point – this is as
good as any) Also note that the standoffs have been
attached to the base PCB with hot-melt glue.
Notes: Ignore the blue coloured connector shown in
this photo, this is again an earlier revision. Also,
Premium sound system owners, please refer to
appendix B for locations of wiring connections and
standoffs.
The wiring colour convention I use is as follows. It works for me, but feel free to use whichever you like. It is
recommended though is to route the signals the way I have – ie, channel numbering 1 to 4. In this way the
colour coding scheme I have used helps prevent unexpected balance/fader operation. The routing I used
is…
(NOTE: Colours shown in parentheses are for alternate output cable)
Channel 1 (Rear LEFT)
- GREY input wire
-
BLACK (green) output wire
Channel 2 (Front LEFT)
- WHITE input wire
-
WHITE (blue)output wire
Channel 3 (Front RIGHT)
- RED input wire
-
RED (red) output wire
Channel 4 (Rear RIGHT)
- ORANGE input wire -
YELLOW (yellow) output wire
(Note: The RED wire referred to above is the red signal wire, not the slightly thicker one supplied for the
+12V connection)
Now rest the buffer board on the standoffs, and cut the wires to length. Don’t forget to allow a little extra, as
you need to manipulate the board a little after the connections are completed. DON’T cut them too short!
Strip about 4mm of insulation from each one, and again twist the strands and tin them.
Firstly connect the input wires 1-2-3-4 to the buffer board inputs, followed by the standby input. Insert the
dressed end through the hole in the PCB and solder it to the associated pad. After the input wires, connect
the red +12V wire, and lastly the black ground wire. To attach the ground, tin the “tab” part of the shield
around the main connector where it’s soldered to the PCB. Also strip and tin the end of the ground wire,
then “sweat solder” the tinned end to the tinned shield.
Don’t forget to clip the excess wires from the PCBs at BOTH ends once soldering is completed. (at the
base-board end, these wires could short to ground or to each other potentially causing significant damage)
If the Aux In board is to be installed in conjunction, also attach the +12SB wire. Make sure the off-cuts don’t
fall into the unit!
