Elecraft KRC2ACC User Manual

Page 3

Case Assembly

Re-install the PCB into the case top following the procedure on page 14 of the KRC2

Assembly and Operations Manual. Use the hardware you previously removed when
disassembling the KRC2.

KRC2 Test Procedure

The KRC2 should be powered from its DC barrel jack using a +12 volt supply for its initial
power-up. No other connections should be made to the unit.

Connect the power source to the unit. After a short delay while the KRC2 performs

diagnostics, the front-panel LED should turn on to its dim level. If this does not happen, turn
power off to the unit and refer to the troubleshooting section.

Driver Relay Test: You will need a DC voltmeter for this procedure. Connect the BLACK lead
(common) to the ground jumper located near J1 on the KRC2. The RED lead should be used to
measure the voltage on each terminal of J6, J7, J8 and J9. Be sure to check the voltage at the side
connector of each terminal. The initial readings should be 0 volts on each terminal.
The Tap/Hold Rule: Each of the pushbutton switches on the top of the KRC2 has two functions,
one activated by a TAP (short press) and the other activated by a HOLD (long press, about 1/2
second). To highlight this in the text, we use two different typographical styles to identify
switches: TAP and

HOL D

. Shift functions require a key to be held, then a second key to be

pressed. These are indicated by

HOL D

TAP .

Holding

should cause the KRC2 to announce a Morse ‘I’ from the speaker, and brighten

the LED. Now tap

to change the driven band terminal. The KRC2 should emit a CW ‘D’. Only

the 60m source terminal should indicate 12 volts. The LED should be alternating between dim and
bright.

Holding

and tapping

again should cause the 10m source terminal to indicate 12 volts,

and all others to remain off.

Continue this procedure, Holding

and tapping

until all HF source terminals have been

checked.

This completes checkout of the KRC2. Continue to the Final Assembly section on page 16 of the
KRC2 Assembly and Operations Manual.