10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 5-15
01 October 2002
(c)
Disconnect the remote control and status wiring
connected to TB1 and TB2. Disconnect all
mating plugs to the control/monitor PWB and
carefully remove all mounting hardware.
(d)
Install the replacement control/monitor PWB
using the hardware removed in step (c).
Reconnect the mating plugs with their
associated connectors on the control/monitor
PWB and reconnect the remote control and
status wiring at TB1 and TB2.
NOTE
Ensure three 1.5 VDC batteries are installed in the
control/monitor PWB's battery holder (XBT1).
Refer to paragraph 4.10.1 for Control/Monitor
Backup Battery Installation.
(e)
Simultaneously press the control/monitor
panel's
OUTPUT POWER - RAISE
and
OUTPUT
POWER - LOWER
switches (resets the RF
output power to zero watts).
NOTE
It may be necessary to press the
ALARM RESET
switch to clear any false alarms caused by the
latching alarm circuitry on the replacemen tPWB.
(f)
Measure the DC voltage between A14U36-8
(+) and ground (-). Adjust
IPA OUTPUT
potentiometer A14R147 until the voltage
recorded as
Low Intermediate RF (A14U36-8)
in table 5-6 is obtained.
(g)
Temporarily disconnect the 22 AWG white
wire in pin 1 of connector P27. Apply 1.0
VDC between P27-1 (+) and ground (-).
(h)
Measure the DC voltage between A14U35-3
(+) and ground (-). Adjust
FWD PWR
potentiometer A14R129 until the voltage
recorded as
Fwd Pwr Mon Adj (A14U35-3)
in
table 5-6 is obtained.
(i)
Measure the DC voltage between A14U36-11
(+) and ground (-). Adjust
LOW RF
potentiometer A14R151 until the voltage
recorded as
Low RF Mon Adj (A14U36-11)
in
table 5-6 is obtained.
(j)
Remove external power supply from P27-1 and
reconnect wire disconnected in step (g).
(k)
Temporarily disconnect the 22 AWG white
wire in pin 2 of connector P24. Apply 1.0VDC
between P24-2 (+) and ground (-).
(l)
Measure the DC voltage between A14U6-3 (+)
and ground (-). Adjust
REFLD PWR
potentiometer A14R20 until the voltage
recorded as
High Reflected Power (A14U6-3)
in table 5-6 is obtained.
(m) Remove external power supply from P24-2 and
reconnect wire disconnected in step (k).
(n)
Measure the DC voltage between A14U4-3 (+)
and ground (-). Adjust
PA VOLTS
potentiometer A14R11 until the voltage
recorded as
PA Volts Max Adj (A14U4-3)
in
table 5-6 is obtained.
(o)
Measure the DC voltage between A14U33-3
(+) and ground (-). Adjust
IPA VOLTS
potentiometer A14R116 until the voltage
recorded as
IPA Volts Control
(A14TP4) in
table 5-6 is obtained.
(p)
Measure the DC voltage between A14U36-5
(+) and ground (-). Adjust
IPA REFLD
potentiometer A14R130 until the voltage
recorded as
IPA REFLD PWR THRESHOLD
(A14U36-5) in table 5-6 is obtained.
(q)
Measure the DC voltage between A14U36-7
(+) and ground (-). Adjust
IPA HIGH
potentiometer A14R138 until the voltage
recorded as
IPA HIGH PWR THRESHOLD
(A14U36-7) in table 5-6 is obtained.
(r)
Install the control/monitor PWB's protective
cover using the hardware retained in step (b).
(s)
Turn on the
PWR MDL
(
A
thru
F
) and
IPA
circuit breakers and then press the
control/monitor panel's
RF ON
switch.
(t)
Press the
OUTPUT POWER - RAISE
switch until
the RF output power is the desired operating
level.
Summary of Contents for FM10
Page 173: ...Figure SD 1 Electrical Schematic FM10 FM Broadcast Transmitter Overview Page SD 1 15 July 1997...
Page 174: ...Figure SD 2 Electrical Schematic AC DC Power Supply Sheet 1 of 2 Page SD 2 15 July 1997...
Page 175: ...Figure SD 3 Electrical Schematic AC DC Power Supply Sheet 2 of 2 Page SD 3 15 July 1997...
Page 177: ...Figure SD 5 Electrical Schematic 3 Phase Monitor PWB NAPC60 03 Page SD 5 15 July 1997...
Page 178: ...Figure SD 6 Electrical Schematic RF Power Stage Sheet 1 of 2 Page SD 6 15 July 1997...
Page 179: ...Figure SD 7 Electrical Schematic RF Power Stage Sheet 2 of 2 Page SD 7 15 July 1997...
Page 180: ...Figure SD 8 Electrical Schematic RF Combiner Final Filter NAF79 Page SD 8 15 July 1997...
Page 181: ...Figure SD 9 Electrical Schematic Control Monitor Function Page SD 9 15 July 1997...
Page 182: ...Figure SD 10 Electrical Schematic Control Display PWB NAPD05 01A Page SD 10 15 July 1997...
Page 185: ...Figure MD 1 Assembly Detail FM10 FM Broadcast Transmitter Front View Page MD 1 15 July 1997...
Page 186: ...Figure MD 2 Assembly Detail FM10 FM Broadcast Transmitter Rear View Page MD 2 15 July 1997...
Page 189: ...Figure MD 5 Assembly Detail NAG02 01 NAG02 02 Circuit Breaker Panel Page MD 5 15 July 1997...
Page 190: ...Figure MD 6 Assembly Detail NAC76 Power Supply Control Panel Page MD 6 15 July 1997...
Page 192: ...Figure MD 8 Assembly Detail NAPD05 01A Control Display PWB Page MD 8 15 July 1997...
Page 193: ...Figure MD 9 Assembly Detail NAI07 Intermediate RF Drive Splitter Page MD 9 15 July 1997...
Page 194: ...Figure MD 10 Assembly Detail NAFP68 IPA Input Power Probe Page MD 10 15 July 1997...
Page 196: ...Figure MD 12A Assembly Detail NAS43 02 Low Voltage Power Supply Page MD 12A 15 July 1997...
Page 197: ...Figure MD 12B Assembly Detail NAS43 02A Low Voltage Power Supply Page MD 12B 15 July 1997...
Page 199: ...Figure MD 14 Assembly Detail NAPC60 03 3 Phase Monitor PWB age MD 14 15 July 1997...
