Panasonic NN-T559WB, Service Manual

Page: 8 / 32

8
4. DESCRIPTION OF OPERATING SEQUENCE
4.1 Variable power cooking control
HIGH VOLTAGE INVERTER POWER SUPPLY (U) controls
output power by a signal from Digital Programmer Circuit (DPC).
Power relay 1 stays on to supply power to the inverter circuit.
The outpower is controlled by the drive signal level from the
inverter circuit.
NOTE 1: The ON/OFF time ratio does not correspond with
the percentage of microwave power since approximately 2
seconds are required for heating of magnetron filament.
NOTE 2: If microwave cooking is over 8 minutes with HIGH
power, fan motor rotates for 1 minute after cooking to cool
oven and electric components.
4.2 Autoweight defrost, autoweight cook
When those auto control feature is selected and Start pad is
pressed:
1. The digital programmer circuit determines the power level
and cooking time to complete cooking and indicates the
operating state in the display. The table shows the
corresponding cooking times for respective weight by
categories.
2. When cooking time in the display window has elapsed, the
oven turns off automatically by the controlled signal from the
digital programmer circuit.
NOTE: After one touch menu and auto reheat cooking, fan
motor rotates for 1 minute to cool oven and electric
components.
VARIABLE POWER COOKING
AUTOWEIGHT DEFROST
AUTOWEIGHT COOK
POWER
SETTING
OUTPUT
POWER
APPROX.
RY-1 INVERTER
CONTROL
SIGNAL
HIGH 900W stay ON stay ON
DEFROST 270W stay ON ON/OFF
MEDIUM 600W stay ON stay ON
LOW 440W stay ON stay ON
SIMMER 250W stay ON ON/OFF
WARM 100W stay ON ON/OFF
CATEGORY WEIGHT COOKING TIME
BREAD 100g 50 seconds
MEAT ITEMS 200g 3 mins
MEAT JOINTS 400g 6 mins 20 secs
CATEGORY WEIGHT COOKING TIME
CHILLED MEAL 300g 3 mins 45 secs
FROZEN MEAL 300g 7 mins
FRESH VEG 100g 2 mins 20 secs
FRESH FISH 100g 1 min 10 secs
JACKET POTATOES 200g 4 mins 30 secs
BOILED POTATOES 200g 4 mins