Speedcook (Diagnostic Chart) - GE SCA1000 Technical Service Manual

Note: Oven must be at room temperature at the start of Speedcook load test.
Does unit turn off
Normal. YES
at 2 minutes?
Perform low
transformer test.
YES
Replace main
PCB.
Speedcook
Select Speedcook
Manual cook time 2 minutes.
Power: U=L L=L
Place neon in oven.
YES
Press start.
**Do microwave and heaters
cycle properly?
NO
**Heaters on 10 seconds
then off. Microwave on
22 seconds then off.
Repeat.
voltage
NO
OK?
Grouded heater
Replace low
voltage
transformer.
Replace main
YES
PCB.
Do both
microwave and
NO
heaters cycle at
incorrect times?
YES
Replace Main
PCB.
Check relays RY3
and RY8 on sub
circuit or main YES PCB.
PCB.
Relay OK?
NO
Replace sub PCB.
Check thermistor.
Yes
Thermistor OK?
NO
Replace
thermistor.
YES
Check relays RY3
and RY8 on sub
PCB.
YES
Relays OK?
Wiring or Main
Replace sub PCB.
PCB.
– 43 –
Does microwave
NO cycle at correct
time?
YES yes
Do heaters stay
YES
on?
NO
Do heaters come
on but short cycle?
NO
Check heaters.
NO
Heaters OK?
Replace heater.
NO
Replace main
YES
PCB.
NO
Does microwave
stay on
continually?
NO
See microwave
flow chart.