
XR12 Troubleshooting Manual
Responding to alarms
Page 1-6
Issue 3.0 2009-07-28
Table 1.1: Troubleshooting Alarms
System Diagram LEDs =
SD
Remote Interface Alarms =
RI
Status
Message
System Diagram LEDs
Remote Interface
Alarms
Description/Action
Auto
Changeover
SD: Changeover
RI:
Exciter Changeover
This event is caused by a fail in the active
exciter while the Auto Changeover function is
enabled. See
Cutback Level
(1-8)
RI:
Cutback
If three shutbacks occur within five seconds, the
transmitter will enter a power reduction mode
called a cutback. See
.
Ext. Interlock
Open
SD: External Alarm
The external interlock input is wired to the
remote interface PWB by the user. An alarm will
be triggered by user-set conditions (e.g., the
state of the door to the transmitter room). See
Ext. PDM
Inhibit
SD: External Alarm
The external PDM Inhibit is wired to the remote
interface PWB. See
.
Fan P/S Fault
SD: Low Voltage
Power Supply
RI:
LVPS Fail
The fan power supply is monitored. An alarm will
be triggered if the fan power supply voltage
varies more than the specified limits. See
High B
+
Voltage
SD: AC Mains
An alarm occurs if the B
+
voltage exceeds its set
threshold. See
High DC
Current
SD: Power Supply
This alarm occurs when the dc current goes
above its factory set threshold -
83 A.
High RF
Current
SD: Output Network
RI:
RF OverCurrent
Alarm
This alarm occurs when the RF current exceeds
its factory-set threshold.
High VSWR
Shutback
SD: Output Network
RI:
High VSWR
This alarm occurs when the reflected power
exceeds its factory-set threshold - approximately
1,920 W. See also
.
Summary of Contents for XR12
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Page 8: ...XR12 Troubleshooting Manual Table of contents Page viii Issue 3 0 2009 07 28...
Page 12: ...XR12 Troubleshooting Manual Page xii Issue 3 0 2009 07 28...
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Page 100: ...XR12 Troubleshooting Manual Detailed Circuit Descriptions Page 2 32 Issue 3 0 2009 07 28...
Page 108: ...XR12 Troubleshooting Manual Parts Lists Page 3 8 Issue 3 0 2009 07 28...
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Page 214: ...XR12 Troubleshooting Manual Reading Electrical Schematics Page 5 6 Issue 3 0 2009 07 28...
Page 223: ...Issue 3 1 2014 05 07 SD 9 Figure SD 9 NAPX05E 02 Dynamic Carrier Control PWB Sheet 1of 2...
Page 224: ...Issue 3 1 2014 05 07 SD 10 Figure SD 10 NAPX05E 02 Dynamic Carrier Control PWB Sheet 2 of 2...
Page 233: ...Issue 3 1 2014 05 07 SD 19 Figure SD 19 NAP34A RF Power Module Overall Sheet 1 of 2...
Page 234: ...Issue 3 1 2014 05 07 SD 20 Figure SD 20 NAP34A RF Power Module Modulator Stage Sheet 2 of 2...
Page 235: ...Issue 3 1 2014 05 07 SD 21 Figure SD 21 NAPC150A RF Drive Control PWB Sheet 1 of 3...
Page 236: ...Issue 3 1 2014 05 07 SD 22 Figure SD 22 NAPC150A RF Drive Control PWB Sheet 2 of 3...
Page 237: ...Issue 3 1 2014 05 07 SD 23 Figure SD 23 NAPC150A RF Drive Control PWB Sheet 3 of 3...
Page 238: ...Issue 3 1 2014 05 07 SD 24 Figure SD 24 NASM07H Modulator Assembly...
Page 239: ...Issue 3 1 2014 05 07 SD 25 Figure SD 25 NAA51A 03 RF Amplifier Assembly...
Page 245: ...Issue 3 1 2014 05 07 SD 31 Figure SD 31 NAPS10C RF Drive Power Supply PWB...
Page 248: ...Issue 3 0 2009 07 28 MD 1 Figure MD 1 XR12 Transmitter...
Page 257: ...Issue 3 0 2009 07 28 MD 10 Figure MD 10 NAPP02 01A RF Current Probe PWB...
Page 259: ...Issue 3 0 2009 07 28 MD 12 Figure MD 12 NAFP103 05 Forward Reflected Power Probe A1 DETAIL...
Page 263: ...Issue 3 0 2009 07 28 MD 16 Figure MD 16 NAPC150A RF Drive Control PWB...
Page 265: ...Issue 3 0 2009 07 28 MD 18 Figure MD 18 NASM07H Modulator Assembly...
Page 266: ...Issue 3 0 2009 07 28 MD 19 Figure MD 19 PA Input Output PWB 176 1065 04 and 05...
Page 267: ...Issue 3 0 2009 07 28 MD 20 Figure MD 20 NAA51A 03 RF Amplifier Assembly...
Page 268: ...Issue 3 0 2009 07 28 MD 21 Figure MD 21 NAPI47B Modulator Input Output PWB...
Page 271: ...Issue 3 0 2009 07 28 MD 24 Figure MD 24 Relay Assy 202 7019...
Page 272: ...Issue 3 0 2009 07 28 MD 25 Figure MD 25 Fan Tray 202 7020 J1 B1 B2...
Page 273: ...Issue 3 0 2009 07 28 MD 26 Figure MD 26 NAPS10C RF Drive Power Supply 62 V...
Page 275: ...Issue 3 0 2009 07 28 MD 28 Figure MD 28 Rectifier Assembly 202 7017...
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