-31-
CONDITION
CHECK
RESULT
CAUSE
REMEDY
No microwave
oscillation.
No continuity.
Continuity.
Defective PCB
assembly.
Replace PCB
assembly.
Disconnect the
wire leads from
relay 2 and
check continuity
of relay2.
(Operate the unit)
Abnormal
Normal
Defective high
voltage
transformer.
Replace high
voltage
transformer.
Check high vol-
tage transformer
Normal
Normal
Abnormal
Defective high
voltage diode.
Replace high
voltage diode.
Check high vol-
tage diode
Abnormal
Defective high
voltage capacitor.
Replace high
voltage capacitor.
Check high vol-
tage capacitor
Abnormal
Defective
magnetron.
Replace
magnetron.
Check
magnetron.
(TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run.
(Display operates properly)
NOTE : • Make sure the wire leads correct position.
• When Removing the wire leads from the parts, be sure to grasp the connector, not the wires.
• When removing the magnetron, be sure to install the magnetron gasket in the correct position
and in good condition.
Output is full power
when you set lower
power level.
Abnormal.
Disconnect the
wire leads from
relay 2 and check
continuity relay 2.
(Operate the unit)
Defective PCB
assembly.
Replace PCB
assembly.
Summary of Contents for 721.62222300
Page 8: ...6 OVERALL CIRCUIT DIAGRAM A I SCHEMATIC DIAGRAM Check the Model No 7...
Page 9: ...8 A II SCHEMATIC DIAGRAM Check the Model No ADD Noise filter...
Page 10: ...9 B MATRIX CIRCUIT FOR TOUCH KEY BOARD Figure 4...
Page 34: ...33 1003 1001 1000 1006 1007 1004 1005 1013 1002 EV DOOR PARTS...
Page 35: ...34 2000 2002 2001 2381 2006 W106 2003 2005 2007 2004 2010 EV CONTROL PANEL PARTS...
Page 37: ...36 4003 4000 4002 4002 W102 EV LATCH BOARD PARTS...
Page 40: ...39 W101 6002 W109 W108 5008 6000 6001 9001 EV BASE PLATE PARTS...
