Tech Sheet

FOR SERVICE TECHNICIAN’S USE ONLY
28
Component Testing Chart - Microwave
Component
Serviceable
Side
Procedure Results - Resistance
Component
Location
Appliance Manager Top 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.
G
Cavity Thermostat Top 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.
Normal = Continuity
Abnormal = Innite
V
Magnetron Fan
Motor
Top 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.
Normal = 15 Ω
Abnormal = Innite
F
Turntable Motor Bottom 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.
Normal =2500 Ω (approximately)
Abnormal = Innite
J