Duke DSO 500, Service Manual, Page: 5 / 80

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MAGNETRON COOLING FANS .................................................................................................37
CABINET THERMAL SWITCH ....................................................................................................39
KEYPAD/CONTROL BOARD ......................................................................................................41
INVERTERS ................................................................................................................................43
SYSTEM TESTING ...........................................................................................................................45
POWER OUTPUT MEASUREMENT ..........................................................................................45
MICROWAVE LEAKAGE TEST ...................................................................................................45
COMPONENT TESTING ...................................................................................................................47
POWER TRANSFORMER TEST ................................................................................................47
DISCHARGING THE HIGH VOLTAGE SYSTEM ON THE DUKE SPEED OVEN. .....................48
HIGH VOLTAGE CAPACITOR TEST ..........................................................................................49
HIGH VOLTAGE RECTIFIER TEST ............................................................................................50
MECHANICAL RELAYS AND INTERLOCK SWITCHES ............................................................51
REPAIR PROCEDURES ...................................................................................................................53
RELAY AND SWITCH REPLACEMENT ......................................................................................53
LINE FUSE REPLACEMENT ......................................................................................................54
INVERTER REPLACEMENT .......................................................................................................55
BLOWER MOTOR REPLACEMENT ...........................................................................................56
ELECTRICAL PANEL REPLACEMENT ......................................................................................58
MAGNETRON REPLACEMENT .................................................................................................59
STIRRER MOTOR REPLACEMENT ...........................................................................................60
HEATER ELEMENT REPLACEMENT ........................................................................................61
CABINET THERMAL SWITCH REPLACEMENT ........................................................................62
HIGH VOLTAGE TRANSFORMER REPLACEMENT..................................................................63
FRONT THERMAL COOLING FAN REPLACEMENT .................................................................64
INTAKE AND EXHAUST FANS REPLACEMENT .......................................................................65
ADJUSTMENTS ..........................................................................................................................66
TROUBLESHOOTING ......................................................................................................................67
SCHEMATIC DIAGRAM ....................................................................................................................71
SPARE PARTS LIST .........................................................................................................................72
APPENDIX A INVERTER PROGRAMMING .....................................................................................73
PROGRAMMING PROCEDURE .................................................................................................73
INVERTER SETTINGS................................................................................................................74
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