Service manual

SOI 12.06 FV 29/43 599 37 42-75
SIGNALS AND TIMES FROM LSI
Signal to sound buzzer
A: Tact switch touch sound.
B: Completion sound.
C: When the temperature of the oven cavity reaches
the preset temperature in the preheating mode,
or when the preheating hold time (30 minutes) is
elapsed.
Magnetron high-voltage circuit driving signal.
ON/OFF time ratio in Micro
cooking
(a. 32second time base)
ON/OFF time ratio in Micro
cooking
(a. 48second time base)
MICRO
COOK
ON OFF MICRO
COOK
ON OFF
100% 32 sec. 0 sec. 100% 48 sec. 0 sec.
70% 24 sec. 8 sec. 70% 36 sec. 12 sec.
50% 18 sec. 14 sec. 50% 26 sec. 22 sec.
30% 12 sec. 20 sec. 30% 16 sec. 32 sec.
To turn on and off the cook relay
(RY2). In 100% operation, the
signals hold "L" level during
microwave cooking and "H" level
while not cooking. In other
cooking modes (70%, 50%, 30%,
10%) the signal turns to "H" level
and "L" level in repetition
according to the power level.
10% 6 sec. 26 sec. 10% 8 sec. 40 sec.
Grill (TOP) heating element driving signal.
Power output On time OFF time
100% 48 sec. 0 sec.
90% 44 sec. 4 sec.
80% 40 sec. 8 sec.
70% 36 sec. 12 sec.
60% 32 sec. 16 sec.
50% 26 sec. 22 sec.
40% 22 sec. 26 sec.
30% 16 sec. 32 sec.
20% 12 sec. 36 sec.
To turn on and off the grill heating element
relay (RY3). "L" level during grill cooking,
convection cooking or dual cooking, "H"
level otherwise. The heater relay turns on
and off within a 48 second time base in
accordance with the special program in LSI.
10% 8 sec. 40 sec.
Convection heating element driving signal.
Power output On time OFF time
100% 48 sec. 0 sec.
90% 44 sec. 4 sec.
80% 40 sec. 8 sec.
70% 36 sec. 12 sec.
60% 32 sec. 16 sec.
50% 26 sec. 22 sec.
40% 22 sec. 26 sec.
30% 16 sec. 32 sec.
20% 12 sec. 36 sec.
To turn on and off the relay (RY4). "L" level
during grill cooking, convection cooking or
dual cooking, "H" level otherwise.
The heater relay turns on and off within a 48
second time base in accordance with the
special program in LSI.
10% 8 sec. 40 sec.