ELECRAFT KX3 - Page 45

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ERR IOA
ERR IOB
RF board I/O expander A or B
unresponsive.
Turn power off and open the KX3’s enclosure. Make sure
the cable between the Control Panel board and RF Board
is fully seated at both ends and is not damaged in any way.
Close the enclosure. Turn power on. Reload MCU and
DSP firmware. If this doesn’t correct the problem, save
your configuration using KX3 Utility, then perform an
EEINIT (pg. 43). If this corrects the problem, restore your
configuration using KX3 Utility. If error codes persist, turn
power off, remove all option modules (KXAT3, KXFL3,
etc.), and turn power back on. Turn off the associated
option module enables in the menu (pg. 35), then turn
power off and back on. If this corrects the problem, re-
install the option modules one at a time to see which one
may be causing the problem. If errors still persist, the
Control Panel or RF Board may have to be replaced. Write
down all error codes and associated data values (displayed
on VFO A), before contacting Customer Support.
ERR KEY
ERR PTT
Attempt to key the transmitter
or activate PTT during power-
on sequence
Usually caused by an incorrect setting of MENU:MIC
BTN for the current microphone, or an external device
shorting the KEY or PTT line to ground, or a shorted
KXPD3 keyer paddle. Turn power off, then disconnect the
KXPD3 (if applicable) and everything plugged into the
left side panel, except for the power supply. Turn power
back on. If the problem has disappeared, plug devices
back in one at a time to see which one caused the error.
ERR OSC
Synthesizer IC unresponsive
Follow steps for ERR IOA.
ERR TX6
ERR TX7
Transmit power MOSFET Q6
or Q7 bias out of range
Follow steps for ERR IOA.
ERR TXG
Transmit gain constant out of
range
If this only occurs on one or two bands, there could be a
problem with a band-pass or low-pass filter. Also try re-
doing Transmit Gain calibration (pg. 33).
ERR TXC
ERR TXS
Transmit attempt without first
calibrating TX BIAS in CW
(TXC) or SSB (TXS) mode
Perform Transmit Bias calibration (pg. 33). This is a
fully-automated procedure that requires no test equipment.
ERR TXN
Transmit attempt without first
nulling the carrier on present
band
Transmit Carrier calibration must be redone (pg. 34).
This procedure requires a spectrum analyzer and is
normally done only at the factory.
ERR TXO
Transmit attempt without first
nulling the opposite sideband
on present band
Transmit Sideband calibration must be redone (pg. 34).
This procedure requires a spectrum analyzer and is
normally done only at the factory.
ERR TXP
Transmit attempt without first
calibrating gain on present band
Follow steps for ERR TXC.
ERR TOS
ERR TPA
Synthesizer or power amplifier
temperature sensor out of range
Follow steps for ERR IOA.
ERR RFB
RF board may be disconnected
from Control Panel board
Follow steps for ERR IOA.
ERR RFK
RF board relay test failure (on
VFO A, d=n nn identifies the
failing relay, e.g. 001 for relay
K1)
Follow steps for ERR IOA.