64
ERR IF1
RF board IF
GRO UP
not responding (A6810
or KNB3-U2)
*
De -install
the KNB3 module on RF
board.
Note:
The K3 cannot be operated
without a KNB3, because this module
includes T -R switching circuitry. Do not
attempt to bypass it using jumpers.
ERR IF2
Sub RX IF GROUP not responding (A6810 or
KNB3-U2)
*
De -install
the KNB3 module on KRX3
first (tap SUB when in the KNB3 menu
entry).
Note:
The sub receiver can be
operated without a KNB3 if a jumper is
placed between pins 1 and 7 of J78 on the
KRX3 module.
ERR IO1
MISO line stuck low (asserted)
*
De -install
option modules one at a time.
If no failing option module can be found,
there may be a problem on the RF board.
ERR IO3
KIO3 not responding
The KIO3 may be defective.
Note :
The K3
can
be operated temporarily without the
KI
O3
i
ns
t
al
l
ed.
You’
l
l
need
t
o
us
e
headphones, and there will be no computer
or AF I/O available on the rear panel.
ERR KEY
ERR PTT
Attempt to key the transmitter or activate PTT
during power-on
Usually caused by an external device
shorting KEY or PTT to ground;
di
s
connec
t
s
uch
devi
c
es
unt
i
l
t
he
y’
r
e
initialized properly. Also see
CONFIG:PTT-KEY
. If necessary, try
removing the KIO3 module or its digital
I/O daughter board.
ERR LPF
No response from LPF shift registers
*
De -install
option modules one at a time.
If no failing option module can be found,
there may be a problem on the RF board.
ERR PA1
KPAIO3 module not responding
*De -install
the KPA3 module and set
CONFIG:KPA3
to
P AIO NO R
. If this
eliminates the error message, the problem
is likely to be on the KPA3 module. If not,
the problem may be on the KPAIO3
module; remove it as well, and set
CONFIG:KPA3
to
NO T I NS T
.
ERR PL1/2
ERR SY1/2
ERR SY3/4
ERR SY5/6
ERR VCO
ERR VC4
VPLL out of range on band change (to view
actual PLL voltage, set
CONFIG: TECH MD
to
O N
, then tap
D I S P
and use VFO B to locate
the
P LL1
and
P LL2
voltage displays).
General problem with PLL, VCO, or other
circuitry on a synthesizer module.
VCO calibration errors. VFO A will show error
data, e.g.
E 0 0 03 9
; report this value to
Elecraft customer support.
Verify that the oscillator can on the
KREF3 is fully plugged in and is not in
backwards. Make sure all internal cables
are plugged in, specifically the cables
between the KREF3 and KSYN3 modules
(synthesizers). Try re-calibrating the
applicable VCO (
CONFIG:VCO MD
) (tap
SUB within the menu entry if you saw
ERR
PL2,
t
o
ma
ke
s
ur
e
you’
r
e
cal
i
br
a
t
i
ng
t
he
s
ub
r
ecei
ver
’
s
s
ynt
hes
i
zer
)
.
I
f
t
hi
s
does
n’
t
wor
k,
t
r
y
r
e
movi
ng
t
he
2
nd
synthesizer (for the sub receiver), and set
CONFIG:KRX3
to
NO T I NS T
. If this
eliminates the error, the sub synth may be
defective. You can also try swapping it
with the main synth to see if it can be
calibrated in this slot.
Summary of Contents for K3
Page 71: ...71 K3 Block Diagram ...
