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10.3 ADJUSTING INTERNAL JUMPERS
Several Felix settings can be adjusted via internal
jumpers. While it’s not trivial to do, if you are handy with
a screwdriver and tweezers, you’ll be fine.
This is not
something you should attempt to do on a dark stage or in
the back of the tour van.
Directions for disassembling the
chassis and accessing the jumpers is as follows:
1.
IMPORTANT:
Before you do anything, disconnect
Felix from the AC power, and disconnect
instrument and mic cables and place Felix on a flat
stable surface with good lighting.
2. DOUBLE CHECK:
Did you completely disconnect the power
supply? Ok then.
3. With a #2 phillips screwdriver, remove the 4 chassis screws,
located on the outer edges of the front bottom and rear
bottom of the aluminum top chassis.
4. Orient the unit so the rearpanel is facing forward. Carefully
pull up on the top chassis and flip it up and over the
bottom chassis. This will reveal the top and bottom circuit
boards. Do not pull them apart any further than the ribbon
cables that connect them will allow. The top should rest
easily on the work surface flipped over and behind the
bottom chassis. See figure 2.
5. Now refer to the jumper location diagram on the following
page to move any jumpers you wish.
6. To move a jumper, use tweezers or your fingernails to
gently pull the jumper off of it’s header pins. To reposition
the jumper, double check the diagram, then gently press
the jumper back down in the correct location.
7. J2, J17, J18 all reside on 2-pin headers. If you wish to set
these to a non-jumpered setting, simply push one side of
the jumper down onto one pin, so that the two pins are
not connected.
Fig.1 removing the chassis screws
Fig. 2 opening the chassis
8. When you are finished adjusting the jumpers, make sure
there are no loose jumpers or any other junk lying around
inside your Felix.
9. Then carefully reassemble the top and bottom chassis,
making sure to let the ribbon cable fold easily back in
place. If there is any tension or something isn’t fitting
properly, carefully pull the top and bottom back apart and
inspect for interference.
10. Once you have put the unit back together, replace the 4
screws, making sure they go in straight and true. You may
need to nudge the top panel back and forth a bit to ensure
the holes in the top panel chassis line up evenly with the
inner threaded holes.
11. Do not tighten the screws until all 4 are cleanly started in
the threads. Take your time and remember, cross-threading
is a crime.
If you get stuck or something doesn’t look right, call us right
away and we’ll get you taken care of.
