TABLE OF CONTENTS
Section Description Page
Pacific Power Source ©2013 vii Document # 126050-10 Rev E
6.0 SERVICE ........................................................................................................... 6-1
6.1 DESCRIPTION ....................................................................................................................... 6-1
6.1.1 MAINFRAME DESCRIPTION .......................................................................................... 6-1
6.1.2 CONTROL MODULE DESCRIPTION ............................................................................. 6-4
6.1.3 INVERTER DESCRIPTION ............................................................................................. 6-6
6.2 THEORY OF OPERATION .................................................................................................... 6-8
6.2.1 THEORY OF OPERATION - POWER CONVERSION CIRCUITS ............................... 6-11
6.2.2 THEORY OF OPERATION - CONTROL CIRCUITS ..................................................... 6-13
6.2.3 THEORY OF OPERATION - DC POWER SUPPLY ..................................................... 6-15
6.2.4 THEORY OF OPERATION - DISPLAY CIRCUITS ....................................................... 6-17
6.2.5 THEORY OF OPERATION - PARALLELING CIRCUITS .............................................. 6-18
6.3 TROUBLESHOOTING PROCEDURE ................................................................................. 6-20
6.3.1 PERFORMANCE CHECK ............................................................................................. 6-21
6.3.2 LVPS SERVICE PROCEDURE ..................................................................................... 6-23
6.3.3 DISPLAY SERVICE PROCEDURE ............................................................................... 6-24
6.3.4 EMER OFF SERVICE PROCEDURE ............................................................................ 6-26
6.3.5 NO-INVERTER-VOLTS SERVICE PROCEDURE ........................................................ 6-28
6.3.6 ABNORMAL VOLTAGE SERVICE PROCEDURE ........................................................ 6-30
6.4 SCHEMATIC DIAGRAMS .................................................................................................... 6-32
6.5 ASSEMBLY REPLACEMENT PROCEDURES .................................................................... 6-35
6.5.1 INVERTER ASSEMBLY REPLACEMENT .................................................................... 6-36
6.5.2 CONTROL PCB ASSEMBLY REPLACEMENT ............................................................ 6-37
6.5.3 MODULATOR PCB ASSEMBLY REPLACEMENT ....................................................... 6-38
6.5.4 DISPLAY PCB ASSEMBLY REPLACEMENT ............................................................... 6-38
6.5.5 LVPS PCB ASSEMBLY REPLACEMENT ..................................................................... 6-39
6.5.6 DISCHARGE PCB ASSEMBLY REPLACEMENT ......................................................... 6-40
6.5.7 DRIVER PCB ASSEMBLY REPLACEMENT ................................................................ 6-41
6.5.8 SNUBBER PCB ASSEMBLY REPLACEMENT ............................................................. 6-42
6.6 COMPONENT REPLACEMENT PROCEDURES ................................................................ 6-42
6.6.1 INPUT POWER PANEL COMPONENT REPLACEMENT ............................................ 6-43
6.6.2 DC POWER SUPPLY COMPONENT REPLACEMENT ............................................... 6-44
6.6.3 INVERTER COMPONENT REPLACEMENT ................................................................ 6-45
6.7 RETURNING ASSEMBLIES FOR REPAIR ......................................................................... 6-46
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