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STEPSTEP
STEPSTEP
STEP SEQUENCESEQUENCE
SEQUENCESEQUENCE
SEQUENCE
Resistance
OK.
Check H.V. Capacitor or H.V.
Diode with an Ohm-Meter after
removing lead wires.
(See page 5)
Normal
resistance
No
operation.
Check operation of Blower
Motor when “START” key
is touched.
Normal
operation.
Check resistance of each
winding after removing
lead wires. (See page 4)
H.V. Transformer.
Resistance
incorrect.
Normal H.V.
Capacitor or
H.V. Diode.
Replace H.V.
Transformer.
Normal H.V.
Transformer.
(4) PROBLEM
Low microwave power
output.
b
a
Replace
Magnetron.
Normal
Magnetron.
Defective
H.V. Capacitor
or H.V. Diode.
Replace H.V.
Capacitor or
H.V. Diode.
Normal H.V.
Capacitor or
H.V. Diode.
Normal
operation.
Replace Thermal Protector
for Magnetron or Thermal
Protector for Cavity.
Normal thermal protector for
Magnetron or Thermal
Protector for Cavity.
Temporarily short
across terminals of
Thermal Protector for
Magnetron or Thermal
Protector for Cavity
by using jumper lead.
No
operation.
Measure resistance
of Blower Motor
Approx. 63 ohms.
Replace Control
Circuit Board.
Normal Control
Circuit Board.
Resistance
incorrect.
Replace
Blower
Motor.
Normal Blower
Motor.
PROBLEM
3-b
Runs
Runs
Runs
Runs
Runs
Runs
RESULRESUL
RESULRESUL
RESUL
TT
TT
T