Checking The Inverter - Whirlpool SPEEDCOOK GH6208 XR Technical Education

Measure Oven Input Current
Connect an ammeter (Valhalla Scientific 2101 or equivalent
recommended) to measure the input current of microwave
oven when the power level is set to Level 10 at the touch
panel.
Check the 1200W Inverter
A
H
G
F
A. CN702
B. Heat sink
C. E701
D. High-voltage output
to magnetron

CHECKING THE INVERTER

15A
Amps
B
C
D
E
E. CN703
F. Control signal in/out
G. CN701
H. 120V AC
If more than 0.5A:
The 1200W inverter is probably OK. Check the magnetron.
See Magnetron test in "Component Tests."
If less than 0.5A:
There is no input to the 1200W inverter.
Check the following:
No AC voltage supply. Check relay control board and
wiring.
No control signal. Check relay control board and wiring.
NOTE: Do not try to repair the inverter board, nor try to make
any adjustments to the board.
Check wiring to 1200W inverter:
1. Unplug microwave oven or disconnect power.
2. Visually inspect 4 connectors on the 1200W inverter
board, CN701, CN702, CN703, E701, to see whether
there are signs of overheating or any signs of failure due
to loose wires, bad crimping, etc.
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