TECH SHEET - DO NOT DISCARD
PAGE 7
FOR SERVICE TECHNICIAN'S USE ONLY
PART NO. 8184997
/4619-651-98301
Complete the following steps before
checking microwave circuitry:
1.
Check the line voltage, household fuses or
circuit breakers.
2.
Check for loose wiring or miswiring within
microwave.
3.
Disconnect white wire from power transformer
and discharge high-voltage capacitor.
4.
All testing must be done with an
ohmmeter having a sensitivity of 20,000
ohms per volt DC or greater, and powered
by at least a 9-volt battery.
5.
All operational checks using microwave
energy must be done with the microwave
oven loaded with a minimum of 300 ml
(10 oz.) of water in a microwave-safe
container.
TROUBLESHOOTING GUIDE
1P2
3P2
FUSE
20 AMP
SECONDARY
INTERLOCK
SWITCH
TURNTABLE
MOTOR
2.7k-3.8k
Ω
HIGH VOLTAGE
SYSTEM
MAGNETRON
THERMOSTAT
PRIMARY
INTERLOCK
SWITCH
MONITOR
SWITCH
BL
TT
ON/OFF
RELAY
(F/L)
CAVITY
THERMOSTAT 2
MICROWAVE
MICROCOMPUTER BOARD
CAVITY
THERMOSTAT 1
BL
RELAY
R
BR
GR
BL
B
CAVITY LIGHT
G
W
W
4P4
CAV LT/DOOR
RELAY
R
6P4
2
1
W
B
W
L1
B
B
N
TT
R
BR
W
BL
W
3P3
4P3
B
FAN
HIGH/LOW
RELAY
MOTOR
CAPACITOR
B
R
R
Y
Y
BL
BL
W
FAN ON
RELAY
LOW VOLTAGE
TRANSFORMER
MICROWAVE COOKING
BL
W
EXHAUST FAN
THERMOSTAT
HOOD FAN
MOTOR
79-119
(approx.)
Ω
W
CAVITY
CAVITY
THERMOSTAT 1
BL
R
3P3
2P3
MICROCOMPUTER BOARD
L1
B
N
4P3
B
B
R
R
Y
Y
BL
BL
W
FAN
HIGH/LOW
RELAY
THERMOSTAT 2
MOTOR
CAPACITOR
FUSE
20 AMP
BLOWER FAN TURNS ON AUTOMATICALLY
MICROCOMPUTER BOARD
L1
BR
LOW VOLTAGE
TRANSFORMER
N
B
R
1P2
3P2
3P3
4P3
W
W
HOOD FAN
MOTOR
W
CAVITY
CAVITY
THERMOSTAT 1
BL
B
B
R
R
Y
Y
BL
BL
MOTOR
CAPACITOR
W
BR
G
79-119
(approx.)
Ω
THERMOSTAT 2
FAN
HIGH/LOW
RELAY
FAN ON
RELAY
FUSE
20 AMP
BLOWER FAN ON HIGH
B:
BL:
BR:
G:
GR:
R:
W:
Y:
BLACK
BLUE
BROWN
GREEN
GRAY
RED
WHITE
YELLOW
