ELECRAFT 41
Alignment and Test, Part 1
In this section you’ll test most of the circuits on the Control board
and front panel. Along the way you’ll become familiar with basic
operation of the K2, including use of the front panel switches,
display, and menu.
Before proceeding with initial test, turn to the first page of the
Operation section of the manual to familiarize yourself with the
K2’s front panel layout. Do not turn on power to the K2 at this
time.
The Tap/Hold Rule
Each of the push-button switches on the front panel has two
functions, one activated by a TAP (short press) and the other
activated by a HOLD (long press, about 1/2 second). The upper
label on each switch shows the TAP function (white lettering), and
the lower label shows the HOLD function (yellow lettering). To
highlight this in the text, we use two different typographical styles
to identify switches:
T A P and H O L D .
Initial Test
i
If any test or alignment step fails, refer to the
Troubleshooting section (Appendix E).
Set the controls on the front panel as follows:
AF GAIN: midway (12 o’clock)
RF GAIN: maximum (clockwise)
KEYER: midway
POWER: minimum (counter-clockwise)
OFFSET: midway
Locate P7 on the Control board. A shorting jumper should be
installed onto the two pins of P7 nearest the "P7" label.
For the remaining test and alignment steps, you’ll need a well-
regulated 12-14 V power supply or a battery. A power supply rated
at 300 mA or more of output current will suffice for the tests in
Parts I and II, but higher currents (3-3.5 A) will be needed for
transmitter tests in Part III.
If your power supply or battery does not already have a plug
that mates with the power jack (J3), use the supplied mating plug
and prepare a suitable power cable. The center lead of the plug is
positive (+).
Make sure the K2 is turned OFF (power switch S1 out). Plug
your power supply or battery into J3 on the rear panel.
Fold the tilt stand out to improve the viewing angle if desired.
i
If you see or smell smoke when you turn the K2 on for the
first time, turn off power and disconnect the power supply
immediately. Normally, you should hear the relays being reset by
the I/O controller. Next, nonvolatile configuration memory
(EEPROM) will be initialized. This process takes approximately 10
seconds. During this period, you should see I N F O 2 0 1 on the
LCD. Displays of this kind are referred to as "INFO messages," and
are used to alert you to possible problems. In this case, the info
message is just a reminder that EEPROM has been initialized.
Turn on the K2 using S1. After about 10 seconds, you should
see the default K2 frequency display for 40 meters: 7 1 0 0 . 0 0 c .
The letter C indicates CW mode. The annunciator for VFO A will
also be turned on. (If you see any other INFO messages or the
display does not come on, refer to Troubleshooting.)
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