Panasonic NN-CT641M Service Manual page 22

COMPONENTS
L.V.Transformer of P.C.B
(Refer to schemetic diagram)
RELAY 2, RELAY 3
OF P.C.B.
(Wire leads removed.)
Note: Relay
Relay 1: Lamp
Turntable motor
Relay 2: Fan motor
Relay 3: Convection
Relay 4:Grill
Relay 5:Microwave
FAN MOTOR
(Wire leads removed)
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.
TEST PROCEDURE
Check for P.C.B. connector.
Disconnect the 3 pin
*
connector from P.C.B.
1 3 5
Relay 3
Relay 4
Relay 5
Relay 2 Relay 1
Measure the resistance.
(Ohm-meter scale: R x 1)
Measure the resistance.
(Ohm-meter scale: R x 1000)
5-11
RESULTS
Normal
Abnormal
Cooking Start
Ω
Normal:
1 00~500
Abnormal: ∞ or several Ω
Normal: Approx.100~200K
Abnormal: ∞ or several Ω
OFF
Ω