Transceiver
25
The Transceiver requires no periodic maintenance.
However, whenever the end cover casing is removed
(for access to the Motor or Transceiver Electronics Module)
ensure that the casting seal is clean and clear of obstacles.
Check that all unit screws are secure whilst the casting end
cover is removed.
26
Whenever the Transceiver Electronics Module is
removed, inspect the input cable connections, look for
worn seals/grommets, traces of water, loose connections
and strands of wire.
27
The Transceiver Unit can be isolated in one of the
following ways:
(1) Switching the display OFF.
(2) Isolating the display.
Access
28
To gain access to PCBs and Modules (refer to
Figure 9b):
(1) Remove the four captive screws securing the
cover to the rear of the Transceiver and remove
the cover.
(2) Disconnect Plugs PLF, G, K, M and L from the
Antenna Terminals PCB.
(3) Remove the four screws securing the RF Head to
the Rotating Joint.
(4) Remove the two bolts securing the Transceiver
Electronics Module to the sliding rails
(5) The Transceiver Electronics Module can now be
removed from the Transceiver.
NOTE:
When refitting any Module/PCB ensure that all
Links/Switch positions are identical to those of the
removed/defective unit.
Original
7b.9
May 01
KH 2020
Chap 7b
WARN INGS
(1) THIS EQUIPMENT IS NOT FITTED WITH SAFETY
INTERLOCKS AND LETHAL VOLTAGES ARE
PRESENT WITHIN THE UNIT. BEFORE REMOVING
ANY SUB-UNIT OR PCB, ALL SUPPLIES MUST BE
SWITCHED OFF.
(2) THE EXTERNAL ISOLATION SWITCH, LOCATED
ON THE TRANSCEIVER CASING, REMOVES THE
+27V MODULATOR SUPPLY INHIBITING THE HIGH
VOLTAGE SUPPLY AND THE +24V AERIAL MOTOR
SUPPLY.
CD-3737
ANTENNA MOTOR
TERMINAL BLOCK
TB2
MOTOR START PCB
OR MOTOR DRIVE PCB
AT BACK OF CASTING
Figure 9b - Transceiver Electronics Module: Access
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 ...
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Page 109: ...THIS PAGE INTENTIONALLY BLANK July 03 viii Amdt 5 KH 2020 Index Chap 1 3 ...
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Page 356: ...Original 7c 19 May 01 KH 2020 Chap 7c CD 2413 Figure 16c Modulator PCB Switches Test Points ...
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