10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 5-14
01 October 2002
FLOATING PA
CONNECTOR CONNECTOR
W37P1 J1
W38P1 J2
P41 J3
P4 J4
W40P2 J5
(c) Remove attaching hardware (hexagon nuts and
washers) from rear retaining studs of IPA
module.
(d) Carefully withdraw the IPA module from the
front of the cabinet.
NOTE
If a serviceable RF power module is available,
install it in place of the IPA module. If not, replace
the IPA module with one of the transmitter's existing
RF power modules. The removal procedure for an
RF power module is described in paragraph 5.8.1
and the installation of an RF power module in place
of the IPA module is described in paragraph 5.8.3.
(e) Service defective IPA module using instructions
detailed in the IPA module's instruction booklet.
5.8.3 IPA REPLACEMENT/RF POWER
MODULE INSTALLATION: Install an RF power
module in place of the IPA module as follows:
(a) Verify requirements of paragraphs 5.8 thru
5.8.2 are completed and being met.
(b) Slide the IPA replacement RF power module
into the IPA module's support tray, from the
front of the cabinet, ensuring retaining studs, at
rear of the module chassis, pass through the
access holes in the support tray.
(c) Secure the IPA replacement RF power module
to its support tray, by attaching hardware
(hexagon nuts and washers) on its rear retaining
studs.
NOTE
Ensure nuts are firmly tightened as the retaining
studs provide a ground for the module.
(d) Connect the following mating connectors on the
rear of the IPA replacement module:
FLOATING RF POWER MODULE
CONNECTOR CONNECTOR
P4 J8
P41 J7
W37P1 J5
W38P1 J6
(e) Locate the IPA Input Matching Assembly (182-
5015-**) provided with the ancillary kit.
NOTE
The IPA Input Matching Assembly consists of two
coaxial cables (W1) connected to a male BNC
connector (P1) on one end and a female BNC
connector (P2) on the other end.
(f) Connect P1 of the IPA Input Matching
Assembly to J9 of the IPA replacement RF
power module.
(g) Connect W40P2 to P2 of the IPA Input
Matching Assembly.
(h) Install the two air filter panels on the rear of the
transmitter cabinet.
(i) Set MAIN POWER circuit breaker to ON (up).
The circuit breaker panel's AC ON lamp shall
turn on.
(j) Turn on the exciter.
(k) Press/release the control/monitor panel's RF ON
switch.
NOTE
If an IPA input alarm occurs, increase the exciter's
output power slightly to compensate for added
cabling and increased mismatch.
CONTROL/MONITOR PWB REPLACEMENT/
ADJUSTMENT
5.9
Install and adjust a replacement control/
monitor PWB as follows:
(a) Press the control/monitor panel's RF OFF
switch
and turn off the MAIN POWER and all PWR
MDL
(A thru F) and IPA circuit breakers.
(b) Remove the control/monitor PWB's protective
cover and retain all hardware.
To Next Page
Loading...
