Nautel XL12 Technical Instructions

Contents

12 000 WATT AM BROADCAST TRANSMITTERXL12Contents (Page 8)01 January 2002TABLE OF CONTENTS (Continued)Section6 THEORY OF OPERATION (Continued)6.6.14.8 Filter Temperature Alarm................................................................................... 6-106.6.14.9 Power Supply Temperature Alarm ...................................................................... 6-106.6.14.10 Power Module Alarm......................................................................................... 6-106.6.14.11 Power Supply Alarm ......................................................................................... 6-106.6.14.12 Modulation Protection Alarm.............................................................................. 6-106.6.14.13 PDM Inhibit Alarm ............................................................................................ 6-106.6.14.14 Standby Alarm ................................................................................................. 6-106.6.15 REMOTE STATUS INDICATIONS ............................................................................ 6-106.6.15.1 Remote Status ................................................................................................. 6-106.6.15.2 RF On Status................................................................................................... 6-116.6.15.3 Exciter B Status............................................................................................... 6-116.6.15.4 Power Level Status ........................................................................................... 6-116.7 AC/DC POWER SUPPLY ....................................................................................... 6-116.7.1 MAIN POWER TRANSFORMER ............................................................................. 6-116.7.2 B+ POWER SUPPLY/DISTRIBUTION ...................................................................... 6-116.7.2.1 3ø Rectifier ...................................................................................................... 6-126.7.2.2 Power Supply Monitor PWB .............................................................................. 6-126.7.3 DC POWER SUPPLY PWB.................................................................................... 6-126.7.3.1 Power Supply Temp Monitor.............................................................................. 6-126.7.3.2 B+ Monitor....................................................................................................... 6-126.7.3.3 Relay Controls ................................................................................................. 6-126.7.3.4 Low Voltage Supply.......................................................................................... 6-126.7.4 DC POWER SUPPLY MONITOR PWB .................................................................... 6-136.7.4.1 AC Fail Detector............................................................................................... 6-137 COMPONENT LEVEL TROUBLE SHOOTING7.1 TROUBLE SHOOTING REFERENCE DATA ............................................................... 7-17.2 AC/DC POWER SUPPLY ......................................................................................... 7-17.3 EXCITER STAGE..................................................................................................... 7-17.3.1 EXCITER INTERFACE PWB...................................................................................... 7-17.3.2 RF DRIVE PWB....................................................................................................... 7-17.3.3 DC POWER SUPPLY PWB...................................................................................... 7-17.3.4 INTERPHASE PDM DRIVER PWB ............................................................................ 7-17.3.5 FREQUENCY SYNTHESIZER PWB .......................................................................... 7-17.3.6 C-QUAM STEREO EXCITER PWB ............................................................................ 7-17.4 RF DRIVE STAGE.................................................................................................... 7-17.4.1 REGULATED POWER SUPPLY PWB....................................................................... 7-17.4.2 RF DRIVE AMPLIFIER.............................................................................................. 7-17.4.3 RF DRIVE TUNING PWB .......................................................................................... 7-17.5 RF POWER STAGE................................................................................................. 7-17.5.1 DISTRIBUTION PWB ................................................................................................ 7-17.5.2 RF POWER MODULE .............................................................................................. 7-27.6 CONTROL/MONITOR FUNCTION ............................................................................. 7-27.6.1 SYSTEM CONTROL PWB ........................................................................................ 7-2