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CON TROL PCB CTX-A246 (Fig ures 8 and 9)
12
A block diagram of the Control PCB is shown in
Figures 4c and 5c
.
13
External cables (except power supply) from the
Display/Interswitch Box and the Tx Monitor Arm are
terminated on the Control/Terminals PCB. The PCB
receives standby, run, pulse length, tune, Rx monitor and Tx
monitor commands from the display and converts them to
the correct format to produce the triggers for the rest of the
transceiver units.
May 01
7c.4
Original
KH 2020
Chap 7c
TX READY
TO DISPLAY
3 SECOND
SELECT
WARM-UP TIMER
180, 90, 3 SECONDS
IC24, 25, 26, 27
RV4 TIMER SET
PSU INTERRUPT
SENSE
C44, IC28A, B
180
90
SEC
LK10
HEATER 1
SENSE
IC3
HEADING LINE
SENSE
IC21A & LK8 OVERRIDE
MUTE OR GATE
D25, D29, D39
HV OFF
GATING
IC7A, B, C
DUMMY
SYNC GATE
IC7C
AE MOTOR
CONTACTOR
SWITCH
TR2 WITH LK1
SELECTED
FROM SOFT
START UNIT
TO SOFT
START UNIT
VIA Tx/Rx
SAFETY
SWITCH
HV OFF TO
POWER UNIT
TO DUMMY
TRIG PULSE
GENERATOR
(SHEET 2)
TO CHARGE
SHUTDOWN
GATE
(SHEET 2)
42Hz
Rx MON MUTE
RUN From Display
MUTE 1 FROM DISPLAY
HEADING LINE
FROM GEARBOX
HTR I MON
FROM MODULATOR
LOCAL OSCILLATOR
REGULATOR
IC2 (ADJUSTABLE)
R11
R10
+15V
L.O. 9/12V
L.O. +ve SELECT
SET VOLTAGE
RESISTORS
POWER ON
RESET (SHEET 2)
FS1
0.3A
+24 V
FAN ON
TR7
TO FAN
TO RECEIVER
FROM RF HEAD
CD-1378
Figure 4c - Control PCB (CTX-A246): Block Diagram (1)
Summary of Contents for Kelvin Hughes Nucleus 3 5000 Series
Page 27: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 ii Amdt 1 KH 2020 Index Introduction ...
Page 73: ...THIS PAGE IS INTENTIONALLY BLANK KH 2020 Chap 2a July 03 2a 6 Amdt 5 ...
Page 101: ...THIS PAGE IS INTENTIONALLY BLANK May 01 3 6 Original KH 2020 Chap 3 ...
Page 109: ...THIS PAGE INTENTIONALLY BLANK July 03 viii Amdt 5 KH 2020 Index Chap 1 3 ...
Page 119: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 x Amdt 1 KH 2020 Contents Chap 4 5 ...
Page 150: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4b 12 Original KH 2020 Chap 4b ...
Page 157: ...THIS PAGE IS INTENTIONALLY BLANK May 01 4c 6 Original KH 2020 Chap 4c ...
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Page 275: ...THIS PAGE IS INTENTIONALLY BLANK July 03 5 18 Amdt 5 KH 2020 Chap 5 ...
Page 279: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 iv Amdt 1 KH 2020 Index Chap 4 5 ...
Page 309: ...THIS PAGE IS INTENTIONALLY BLANK Sep 01 xiv Amdt 1 KH 2020 Contents Chap 7 8 ...
Page 356: ...Original 7c 19 May 01 KH 2020 Chap 7c CD 2413 Figure 16c Modulator PCB Switches Test Points ...
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Page 445: ...THIS PAGE INTENTIONALLY BLANK July 03 8aA 16 Amdt 5 KH 2020 Chap 8a Annex A ...
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