Inverter NN-T551CB, Service Manual

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Figure 3
9.6. Inverter Power Supply Unit
Warning
Do not attempt to make any measurements in the high voltage circuitry of the
inverter or magnetron.
See troubleshooting of the inverter circuit and magnetron on P.19 to determine if the
inverter power supply is still functioning.
9.7. Steam Sensor and Digital Programmer circuit
Caution
Do not touch any parts of the circuitry on the digital programmer circuit since static
electric discharge may damage this control panel.
Always ground yourself while working on this panel to discharge any static from
your body.
In order to detemine if the steam sensor programe of the digital programmer circuit is
in working order, do the following test.
1. Place a water load (150cc) inn the oven
2. Set the Auto sensor program 3 fish.
3. Tap the Start pad
4. Steam Sensor detects steam about 1 minute and 30 seconds to four minutes after
the start pad is pressed.