Microwave (Diagnostic Chart) - GE SCA1000 Technical Service Manual

Perform Control
Replace main Panel Test.
YES
PCB.
Pass test?
NO
Replace control
panel.
High voltage
system YES
malfunction.
Microwave
Place standard test
load in oven.
Program time cook
for 30 seconds.
YES
Does oven start
without pushing
start button?
Perform
Microwave
Normal. YES Performance Test.
Pass test?
Check line voltage
Did temperature
under full load.
YES rise but less than
Voltage OK?
NO
Notify customer of
Check relay RY2
electrical problem.
om main PCB.
Relay OK?
High voltage
system
malfunction.
– 44 –
Press start button.
NO NO
Do fan and lights
come on?
YES
Does oven time
out and turn off?
YES
NO
NO
28° F?
NO
Replace main
NO
PCB.
YES
Check interlocks.
Repair or replace
NO
interlock.
Interlocks OK?
YES
Perform Control
Panel Test. Replace control
NO
panel.
Pass test?
YES
Replace main
PCB.