Elecraft KIO2 - Manual (Page 9)

9
Using long-nose pliers, insert the wires of one end of the cable into the holes of J2 on the top side of
the KIO2 board (Figure 4). Insert the wires in this order: BLUE (pin 1--round pad), GREEN (2),
ORANGE (3), BARE (5), BLACK (6), RED/BLACK (7), RED (8), WHITE/BLACK (9), WHITE (10). Be
sure to match the wire colors to their associated pads as shown. Note that the dual-row connectors have
their pins numbered left to right and top to bottom, which is different from IC pin numbering.
Turn the KIO2 board over. Bend the wires slightly so they won't fall out. Solder the wires (about 1-2
seconds per wire--excessive heat could damage the insulation). Trim off excess lead length.
When all wires are soldered, examine the solder joints carefully. All joints should be clean and shiny,
with no solder bridges.
Clamp the AUX2 PC board into a vise or place it on the work bench, using the exact orientation
shown in Figure 4. Connector P1 should be at left, and the pads for J2 should be at right. A connector will
not be used at J2. As before, the wires will be soldered into position here.
Insert the wires of the free end of the cable into the holes of J2 on the AUX2 board (Figure 4). Insert
the wires in the same order as you did on the KIO2 board: BLUE (pin 1), GREEN (2), ORANGE (3),
BARE (5), BLACK (6), RED/BLACK (7), RED (8), WHITE/BLACK (9), WHITE (10).
Turn the AUX2 board over. Carefully solder and trim the wires. Note: The wires must be trimmed as
close to the bottom of the AUX2 board as possible. This will prevent shorting to the voltmeter connector on
theK2 Control board.
Once all wires are soldered, check for (and correct) any cold solder joints or solder bridges.
K2 Control Board Preparation
Make sure the K2's power is turned OFF. If the battery is installed, put its switch in the OFF position.
Remove the 6 top cover screws shown on page 77 of the Rev. C K2 manual (Figure 7-6). Carefully lift
off the top cover and set it to the right, being careful not to short the battery terminals to the case (if
applicable). Disconnect the speaker and all top-cover option connectors.
i
If you have both the KBT2 (internal battery) and KAT2 (ATU) options installed, you should
make sure that their 2-pin connectors are visually distinguished in some manner. Otherwise, you
might reverse them during re-assembly, damaging one or more components. As of this writing, the
KBT2 12V connector was to be replaced with a different type of connector. If your KBT2's 12V connector
is the same type used for the KAT2 RF connector, you should use paint, nail polish, tape, or labels of some
type to make the two connectors easy to tell apart. For example, you could dab red model paint onto both
the male and female KBT2 12V connectors.
i
Touch a grounded, unpainted metal surface before handling the Control board in the
following steps.