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them and the circuit has been pre-tested at the factory for you. Due to circuit
requirements U7's support parts are also SMT.
GF. GROUNDING FINGER INSTALLATION
I know you are anxious to start soldering parts but first let's install the
beryllium grounding fingers in the case bottom. These fingers have glue that
needs to set before the circuit board can be installed in the case. Let's use
our time efficiently by using the time we are going to take installing parts to
also let the glue set on the fingers.
Locate the 6 brass colored shield 'finger' contacts and the case bottom.
These fingers will be mounted on the two small 'shelves' along the edges of
the case bottom. The shielding fingers MUST be placed so the fingers are all
in the same direction. See the picture below for correct placement.
NOTE: The adhesive is pressure activated and once you press it in place any
attempt to reposition it will result in failure of the adhesive, so make
sure the fingers are all facing the same direction BEFORE pressing
into place! It is best to clean the case bottom with denatured or
rubbing alcohol before attaching the fingers.
1. Remove the protective paper on the double back tape, and position the
finger so it is tight against the side of the case bottom on the small 'shelf'
running the length of the tray.
2. Mount four fingers on the shelf so they are 1/2 inch in from the ends of
the case bottom on each side.
3. The remaining two fingers are mounted mid way between the four
fingers installed in the previous step.
4. Once properly positioned use a flat screwdriver blade to firmly press
the strip onto the case bottom.
5. Set the case bottom aside for now. Full adhesion requires 24 hours.
Be careful not to disturb the fingers once pressed into place.
BACK
IB. INPUT BUFFER CIRCUIT
1. Install R15, a 10K ohm resistor (marked Brown, Black, Orange).
Resistors have no special polarity so they can be installed in either
direction.
MOUNTING TAPE
SLIDE BOARD IN
UAM4SYS • 15
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