Service manual

30
KB-3300JS
KB-3300JK
KB-3300JW
37 P17 OUT Bottom heater relay driving signal.
To turn on and off relay(RYB).
“H” level: During bottom heater relay ON.
“L” level: During bottom heater relay OFF.
38 P16 OUT Turminal not used.
40 P14 OUT Door lock motor driving signal.
To turn on and off relay(RY8).
“H” level: During door lock motor ON.
“L” level: During door lock motor OFF.
41 P13 OUT Oven lamp (Oven) driving signal.
To turn on and off relay(RY7).
“H” level: During oven lamp ON.
“L” level: During oven lamp OFF.
42 P12 OUT Fan motor (Oven) driving signal.
To turn on and off relay(RY6).
“H” level: During fan motor ON.
“L” level: During fan motor OFF.
43 P11 OUT Fan motor (Drawer) driving signal.
To turn on and off relay(RY5).
“H” level: During fan motor ON.
“L” level: During fan motor OFF.
44 P10 OUT Top heater driving signal.
To turn on and off relay(RY4).
“H” level: During top heater ON.
“L” level: During top heater OFF.
45 P07 OUT Oven common relay driving signal.
To turn on and off relay(RY3).
“H” level: During oven common relay ON.
“L” level: During oven common relay OFF.
46 P06 OUT Oven lamp and stirrer motor driving signal.
To turn on and off relay(RY1).
“H” level: During oven lamp and stirrer motor ON.
“L” level: During oven lamp and stirrer motor OFF.
47 P05 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay(RY2). In 100%
power operation, the signals holds “H” level during
microwave cooking and “L” level while not cook-
ing. In other cooking modes (90%, 80%, 70%,
60%, 50%, 40%, 30%, 20%, 10%, 0%) the signal
turns to “H” level and “L” level in repetition accord-
ing to the power level.
48-52 P04-P00 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
53 P57 OUT Common relays driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relays (RY1 and
RY3). The square waveform voltage is delivered
to the relays (RY1 and RY3) driving circuit.
54 P56 IN Signal coming from key unit.
55 TXD1 IN Signal coming from key unit.
56 RXD1 IN Signal coming from key unit.
Pin No. Signal I/O Description
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
Microwave cooking mode
Other cooking mode
VARI MODE ON TIME OFF TIME ON TIME OFF TIME
100% power 32 sec. 0 sec. 60sec. 0ec.
90% power 30 sec. 2 sec. 54sec. 6sec.
80% power 26 sec. 6 sec. 48sec. 12sec.
70% power 24 sec. 8 sec. 42sec. 18sec.
60% power 22 sec. 10 sec. 36sec. 24sec.
50% power 18 sec. 14 sec. 30sec. 30sec.
40% power 16 sec. 16 sec. 24sec. 36sec.
30% power 12 sec. 20 sec. 18sec. 42sec.
20% power 8 sec. 24 sec. 12sec. 48sec.
10% power 6 sec. 26 sec. 4sec. 56sec.
0% power 0 sec. 32 sec. 0sec. 60sec.
ON
OFF
L: GND
H: +5V
During cooking
L: GND
H: +5V
16.7 msec.