Page 5-32 V10/V7.5/V5/V3.5 Installation and Operation Manual
Issue 3.5 Section 5 System Level Troubleshooting
5.12 REJECT LOAD MODULE
FAULT
If the module’s resistor ring or reject load is
the likely source for a transmitter fault, and
further troubleshooting of the module is
desired, remove the module from the
transmitter as follows:
NOTE
Do not allow the transmitter to operate with
a faulty reject load. If a reject load if
suspected to be faulty repair the reject load
immediately.
CAUTION
Never disconnect reject load coaxial cables
while the transmitter is on-air.
NOTE
Depending on the type of fault, it may be
possible to troubleshoot/repair a defective
reject load module - with its cover removed
- while still in the transmitter. If the reject
load module requires removal, ensure the
transmitter is off-air before removing.
Depending on the number of failures the
transmitter may be able to resume
operation at a reduced output power level.
Station policy will dictate when it is most
convenient to replace/repair the faulty
module.
5.12.1 Reject Load Module
Removal
Remove a defective reject load module
(A39 or A40) from the transmitter as
follows:
CAUTION
Ensure that the transmitter is off and ac is
switched off at the service entrance.
(a) Verify the requirements of paragraph
5.12 have been completed.
(b) Remove the top, rear filter panel to
gain access to the reject load modules.
Retain the securing hardware [12
(V5/V3.5) or 14 (V10/V7.5) M5 Phillips
screws].
(c) Disconnect the applicable cooling fan
plug (B11P1 or B12P1) for the reject
load module being removed from its
source connector P85 or P86,
respectively.
(d) Disconnect all coaxial cables from the
reject load (both sides, as applicable).
Disconnect 4-pin MTA connector(s)
(P81, P82, P83 or P84, as applicable)
from J17 of either A1 or A2 (if
applicable) of the reject load module.
(e) Remove and retain the hardware that
secures the reject load module to the
transmitter cabinet (six M5 Phillips
head).
(f) Slide the suspect reject load forward
and remove it from the transmitter.
Place it on a suitable workbench for
troubleshooting/repair.
WARNING
The reject load module is heavy. Ensure
adequate manpower is available when
removing it from the transmitter.
NOTE
If an operational reject load module is
available, install it in the transmitter while
servicing the defective reject load module.
Refer to paragraph 5.12.2 to install a reject
load module. Refer to the Repair manual to
troubleshoot or repair a defective reject
load module.
5.12.2 Reject Load Module
Installation
Install an operational reject load module in
the transmitter as follows:
(a) Lift the operational reject load module
into the transmitter.
WARNING
The reject load module is heavy. Ensure
adequate manpower is available when
installing it in the transmitter.
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