Component Testing; The Turntable And Damper Motors - Whirlpool GM8155XJQ Job Aid

COMPONENT TESTING

Before testing any of the components, perform
the following checks:
• The most common cause for control failure is
corrosion on connectors. Therefore, discon-
necting and reconnecting wires will be nec-
essary throughout test procedures.
• All tests/checks should be made with a VOM
or DVM having a sensitivity of 20,000 ohms-
per-volt DC, or greater.

THE TURNTABLE AND DAMPER MOTORS

WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all panels before operating.
Failure to do so could result in death or
electrical shock.
TURNTABLE MOTOR
Refer to page 2-18 for the procedure for servic-
ing the turntable motor.
1. Disconnect the electrical power to the
microwave oven.
2. Disconnect the wires from the turntable
motor terminals.
3. Set the ohmmeter to the R x 1 scale.
4. Touch the ohmmeter leads to the motor
terminals. The meter should indicate 25 Ω.
• Check all connections before replacing com-
ponents, looking for broken or loose wires,
failed terminals, or wires not pressed into
connectors far enough.
• Any voltage checks must be made with all
connectors attached to the boards.
• Resistance checks must be made with power
cord unplugged from outlet, and with wiring
harness or connectors disconnected.
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all panels before operating.
Failure to do so could result in death or
electrical shock.
DAMPER MOTOR
Refer to page 2-8 for the procedure for servic-
ing the damper motor.
1. Disconnect the electrical power to the
microwave oven.
2. Disconnect the wires from the damper
motor terminals.
3. Set the ohmmeter to the R x 1K scale.
4. Touch the ohmmeter leads to the motor
terminals. The meter should indicate be-
tween 2900 and 3400 Ω.
3-1