4
12.4
O
VER
-
TEMPERATURE CUT
-
OFF
........................................................................................................................................... 20
12.5
O
VER
-
CURRENT CUT
-
OFF
................................................................................................................................................... 21
12.6
I
G
2
BLINKS FAST
-
N
O PLATE VOLTAGE
.............................................................................................................................. 21
12.7
S
PARKS
/
D
ISCHARGES IN
RF
AREA
.................................................................................................................................... 21
12.8
SWR
CUT
-
OFF
.................................................................................................................................................................... 21
12.9
F
REQUENT OVER
-
DRIVE PROTECTION CUT
-
OFF
.................................................................................................................. 21
12.10
T
UBE REPLACEMENT
...................................................................................................................................................... 21
13
WARRANTY / SERVICE .................................................................................................................................................. 21
14
GLOSSARY......................................................................................................................................................................... 22
15
APPENDIX 1: SCHEMATIC DIAGRAMS ..................................................................................................................... 23
15.1
DX-3
B
LOCK
D
IAGRAM
..................................................................................................................................................... 23
15.2
C
IRCUIT
D
IAGRAM
–
HIGH
VOLTAGE
POWER
SUPPLY.............................................................................................. 24
15.3
C
ONTROL
B
OARD AND
A
DJUSTMENT
P
OINTS
..................................................................................................................... 25
15.4
C
IRCUIT
D
IAGRAM
–
AC
INPUT
AND
WIRING
DIAGRAM
–
S
TANDARD
..................................................................... 26
15.5
C
IRCUIT
D
IAGRAM
–
AC
INPUT
AND
WIRING
DIAGRAM
–
U.S.
V
ERSION
................................................................. 27
15.6
C
IRCUIT
D
IAGRAM
–
SOFT
START
(200
TO
240
V
OPERATION) ................................................................................. 28
15.7
C
IRCUIT
D
IAGRAM
–
QSK ................................................................................................................................................. 29
15.8
C
IRCUIT
D
IAGRAM
–
RF
MODULE................................................................................................................................... 30
15.9
C
IRCUIT
D
IAGRAM
–
CONTROL
BOARD ........................................................................................................................ 32
15.10
CONTROL
BOARD
–
C
OMPONENT
L
EGEND
(S
ILKSCREEN
TOP) ................................................................................ 33
C
ONTROL
B
OARD
–
S
OLDER
S
IDE
T
RACK WORK
............................................................................................................................ 34
16
APPENDIX 2: WAVEFORMS .......................................................................................................................................... 35
16.1
QSK
(O
PTIONAL MODULE
)
S
WITCHING
.............................................................................................................................. 35
16.2
L
INEARITY
......................................................................................................................................................................... 35
17
APPENDIX 3: ADJUSTMENTS ....................................................................................................................................... 36
17.1
CONTROL
BOARD ......................................................................................................................................................... 36
17.1.1
PRE-BIAS ADJUSTMENT (Adjustment: POT7, marked PRE_BIAS)....................................................................... 36
17.1.2
BIAS ADJUSTMENT (Adjustment: POT3, marked BIAS)......................................................................................... 36
17.1.3
SWR Protection adjustment....................................................................................................................................... 37
17.1.4
EBS ADJUSTMENT (Adjustment: POT4, marked EBS). .......................................................................................... 37
17.1.5
SCREEN VOLTAGE ADJUSTMENT (Adjustment: POT2, marked SCREEN) ......................................................... 38
17.1.6
SCREEN CURRENT LIMIT ADJUSTMENT (Adjustment: POT1, IG2LIMIT)........................................................ 38
17.1.7
IPTRIP ADJUSTMENT (Adjustment: POT6, marking: IP TRIP) ............................................................................. 38
17.2
DISPLAY
BOARD
ADJUSTMENTS .............................................................................................................................. 40
17.2.1
PLATE CURRENT (Adjustment: VR4, Marked: AMP) ............................................................................................. 40
17.2.2
PLATE VOLTATE (Adjustment: VR2, marked: VOLT)............................................................................................. 40
17.2.3
REFLECTED POWER (Adjustment: VR3, marked: RF R) ....................................................................................... 40
17.2.4
FORWARD POWER (Adjustment: VR1, marked: RF F)........................................................................................... 41
17.2.5
SCREEN CURRENT (Adjustment: VR6, marked IG2+, VR5, marked IG2-) ............................................................ 41
17.3
RF
SENSOR
ADJUSTMENT ........................................................................................................................................... 42