Sears 721.62222300, Manual

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TURNTABLE
MOTOR
(Wire leads removed)
NOTE : • A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY
REASON.
• MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION.
• WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE CONNECTOR, NOT THE WIRES.
FAN MOTOR
(Wire leads removed)
Measure the resistance.
(Select the
Ω
scale on the meter)
Measure the resistance.
(Select the
Ω
scale on the meter)
Normal: Approx. 65 ~ 80 ohm
Abnormal: Infinite or several
ohm.
Normal: Approx. 2 ~ 4K ohm
Abnormal: Infinite or several
ohm.
COMPONENTS TEST PROCEDURE RESULTS
B. CHECKOUT PROCEDURES
(1) CHECKOUT PROCEDURES FOR FUSE BLOWING
CAUTION: REPLACE BLOWN FUSE WITH 20 AMPERE FUSE.
NOTES:
- If the fuse is blown by an improper switch operation, replace the defective switches and the fuse at the same time. After
replacing the defective switches with new ones, make sure that they are correctly connected.
- Check for microwave energy leakage according to “1. ADJUSTMENT PROCEDURES” on page 3, when the primary,
secondary interlock switches and/or the interlock monitor switch are adjusted or replaced.
Fuse blows immediately after
the door is closed.
Fuse blows immediately after
the door is opened.
Fuse blows when the door is closed and
START key is touched.
Improper operation of the primary, secondary interlock switches and/or the
interlock monitor switch.
Malfunction of the high voltage transformer; the high voltage capacitor
including the diode, the magnetron, the blower motor or the circuit board.
PROBLEMS CAUSES
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