FOR SERVICE TECHNICIAN'S USE ONLY
Serviceable
Component
Side
Appliance Manager
Top
Cavity Thermostat
Top
Magnetron Fan
Top
Motor
Turntable Motor
Bottom
Component Testing Chart - Microwave
Procedure
Check wiring to MW appliance manager:
1.
Unplug microwave oven or disconnect power.
2.
Visually inspect connectors on the microwave appliance
manager, P1, P2, P8, P21, P22, P23, P26, P354, P355,
and the top connectors (relays 4903, 4904, and 4905) to
see whether there are signs of overheating or any signs
of failure due to loose wires, bad crimping, etc.
3.
Reassemble all parts and panels before operating.
4.
Plug in microwave oven or reconnect power.
1.
Unplug microwave oven or disconnect power.
2.
Remove wire leads.
3.
Measure resistance.
4.
Replace wire leads.
5.
Reassemble all parts and panels before operating.
6.
Plug in microwave oven or reconnect power.
1.
Unplug microwave oven or disconnect power.
2.
Remove wire leads.
3.
Measure resistance (ohmmeter scale: Rx1).
4.
Replace wire leads.
5.
Reassemble all parts and panels before operating.
6.
Plug in microwave oven or reconnect power.
1.
Unplug microwave oven or disconnect power.
2.
Remove wire leads.
3.
Measure resistance (ohmmeter scale: Rx1).
4.
Replace wire leads.
5.
Reassemble all parts and panels before operating.
6.
Plug in microwave oven or reconnect power.
Results - Resistance
Normal = Continuity
Abnormal = Infinite
Normal = 15 Ω
Abnormal = Infinite
Normal =2500 Ω (approximately)
Abnormal = Infinite
28
Component
Location
G
V
F
J