6
The free ends of the wires will be routed to matching labeled holes on KX1 PC board. Due to space
constraints on the top, the holes are labeled on the
bottom
side of the KX1 board (the side that faces the
battery pack). The list below shows where to find the labeled holes, based on nearby top-side components:
5
Just left of U8 (the 5-volt regulator, which is near the MCU)
D
Near pin 15 of U1 (MCU)
G
Between two pins of the encoder (Z1), near the
U6
label (
Note
: C15, on the
bottom of the board, must be folded up temporarily to access this hole)
C
Between C1 and L7, near pin 8 of U6 (NE602)
B
Immediately below the
C26
label and to the right of trimmer CA
A
Just to the right of the
CC
label
G
At the right end of L7, and the left side of the FILTER potentiometer, R2
Insert the
5
and
D
leads (the insulated wires) into their pads on the KX1 board, then solder and trim
the leads on the bottom side. (The two wires will cross over each other after installation.)
i
Do not solder the remaining wires yet.
Insert the remaining leads (bare) into their pads on the KX1 board, then pull them all taut on the
bottom side as you position the KXB30.
Verify that all wire leads have been inserted into the correct labeled pads.
Press down on the KXB30 module so that it is as close as possible to the top of U6.
Turn the KX1 over and verify that the adjustment slots on the KXB30's two trim caps are centered
inside their access holes (
30A
and
30B
). If not, adjust the position of the board as needed.
Adjust
all of the bare wires such that they do not touch each other or adjacent components.
Once you're sure the KXB30 and all of its interconnections are correctly positioned, solder and trim
these leads on the bottom of the KX1 board.
Flush-trim the
G
lead between the encoder pins, then fold capacitor C15 back down so it will not hit
the battery socket.
Using a magnifying glass, examine all of the trimmed leads on the visible side of the KXB30 board.
Flush-trim all leads as short as possible so they can't short to the KX1's top cover. Incorrectly-trimmed
leads may also interfere with installation of the two rubber bumpers in the next step.
