V10/V7.5/V5/V3.5 Installation and Operation Manual Page 5-33
Section 5 System Level Troubleshooting Issue 3.5
(b) Reverse the order of steps in
paragraph 5.12.1.
NOTE
Coaxial cables W51-W82 (V10), W51-
W62, W67-W78 (V7.5), W51-W66 (V5),
W51-W62 (V3.5) have a green label on
both ends (P1 and P2). Except where
physical constraints prevent connector
mating, these cables are interchangeable.
Coaxial cables W19-W50 (V10), W19-
W22, W27-W30, W35-W38, W43-W46
(V7.5), W19-34 (V5), or W19-W22, W27-
W30 (V3.5) have a red label on the P1
end. Except where physical constraints
prevent J1 and P1 connector mating,
these cables are interchangeable. (A
small hole, near a BNC connector at the
top of the reject load module cover,
indicates the connector to which the
furthest PA should connect.) Cables for
module B (V3.5) or in modules B and F
(V7.5) are not interchangeable.
For each reject load PWB (see Figure
MD-14 of the Repair Manual), the coaxial
cables must alternate
between green and
red labels around the ring, in a clockwise
manner. It is recommended that
subsequent red coaxial cables be from the
opposite module (e.g., A, B, A, B, etc.)
For V10/V5, reject load PWB A39A1
accepts all PA outputs of RF power
modules A and B and applies them to
combiner A41A1. For V7.5/V3.5, reject
load PWB A39A1 accepts all PA outputs
of RF power module A and two PA
outputs of RF power module B and
applies them to combiner A41A1.
For V10/V5, reject load PWB A40A1
accepts all PA outputs of RF power
modules C and D and applies them to
combiner A41A2. For V7.5/V3.5, reject
load PWB A40A1 accepts two PA outputs
of RF power module B and all PA outputs
of RF power module C and applies them
to combiner A41A2.
For V10 transmitters, reject load PWB
A39A2 accepts all PA outputs of RF
power modules E and F and applies them
to combiner A41A3. For V7.5 transmitters,
reject load PWB A39A2 accepts all PA
outputs of RF power module E and two
PA outputs of RF power module F and
applies them to combiner A41A3.
For V10 transmitters, reject load PWB
A40A2 accepts all PA outputs of RF
power modules G and H and applies them
to combiner A41A4. For V7.5 transmitters,
reject load PWB A40A2 accepts two PA
outputs of RF power module F and all PA
outputs of RF power module G and
applies them to combiner A41A4.
(c) Turn ac on at the service entrance and
restore the transmitter to operation.
5.13 RF DRIVE SPLITTER/
CHANGOVER ASSEMBLY FAULT
If prior troubleshooting indicates that the
RF drive splitter/changeover assembly is
the likely source for a transmitter fault, and
further trouble-shooting of the sub-
assembly is desired, remove the sub-
assembly from the transmitter as follows:
NOTE
A defective RF drive splitter/changeover
assembly cannot be removed for repair
while the transmitter is on-air. Station policy
will dictate when it is most convenient to
replace/repair the faulty sub-assembly.
5.13.1 RF Drive Splitter/
Changeover Assembly Removal
Remove a defective RF drive splitter/
changeover assembly (A16) 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
5.13 have been completed.
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