5.1. Variable power cooking
control
The coil of power relay B (RY1) is energized intermittently by
the digital programmer circuit, when the oven is set at any
power selection except for High power position. The digital
programmer circuit controls the ON-OFF time of power relay B
contacts in order to vary the output power of the microwave
oven from ”Low” to “High” power. One complete ON and OFF
cycle of power relay B is 22 seconds. The relation between
indications on the control panel and the output of the
microwave oven is as shown in table.
NOTE:
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.
OUTPUT
ON-OFF TIME OF
POWERSETTING
POWER(%)
POWER RELAY B (RY1)
APPROX.
ON(SEC)
OFF(SEC)
HIGH
100%
22
0
MEDIUM-HIGH
70%
17
5
MEDIUM
50%
13
9
MEDIUM-LOW
30%
8
14
LOW
15%
5
17
DEFROST
30%
8
14
5.2. Auto Defrost, Auto Reheat,
Auto Cook control
When those Auto Control feature is selected and the Start Pad
is tapped:
1. The digital programmer circuit determines the power level
and cooking time to complete cooking and indicates the
operating state in the display window.
Table
shows
the
corresponding
cooking
times
for
respective serving or weight by categories.
2. When cooking time in the display window has elapsed, the
oven turns off automatically by a control signal from the
digital programmer circuit.
Auto Defrost
WEIGHT SELECTED
COOKING TIME
1.0KG
9 min.23 sec.
Auto Cook
CATEGORY
WEIGHT SELECTED
COOKING TIME
Oatmeal
1 SERV
4 min.30 sec.
5 DESCRIPTION OF OPERATING SEQUENCE
8
NN-S335BF / NN-S335WF / NN-S335WM /
Summary of Contents for NN-S335WM
Page 2: ...2 NN S335BF NN S335WF NN S335WM ...
Page 6: ...4 SCHEMATIC DIAGRAM 4 1 APH RPH 6 NN S335BF NN S335WF NN S335WM ...
Page 7: ...4 2 CPH 7 NN S335BF NN S335WF NN S335WM ...
Page 19: ...11 1 Trouble related to Digital Programmer Circuit 19 NN S335BF NN S335WF NN S335WM ...
Page 20: ...11 2 How To CHECK THE SEMICONDUCTORS USING AN OHM METER 20 NN S335BF NN S335WF NN S335WM ...
Page 21: ...12 EXPLODED VIEW AND PARTS LIST 12 1 EXPLODED VIEW 21 NN S335BF NN S335WF NN S335WM ...
Page 25: ...13 DIGITAL PROGRAMMER CIRCUIT 13 1 SCHEMATIC DIAGRAM 25 NN S335BF NN S335WF NN S335WM ...
